TEF6904AH/V5S,557 - NXP Semiconductors

1. General description

The TEF6904A is a single-chip car radio integrated circuit with FM/AM tuner, stereo

decoder, weak signal processing and audio processing.

FM tuner with double conversion to IF1 = 10.7 MHz and IF2 = 450 kHz with integrated

image rejection for both IF1 and IF2; integrated channel ﬁlter with variable bandwidth

control; capable of US FM, Europe FM, Japan FM and Eastern Europe FM. AM tuner with

double conversion to IF1 = 10.7 MHz and IF2 = 450 kHz; capable of Long Wave (LW),

Medium Wave (MW) and full range Short Wave (SW) (11 m to 120 m bands).

Multiplex (MPX) stereo decoder, ignition noise blanker and extensive weak signal

processing.

Audio processing with ﬂexible source selection, volume, balance, fader, input gain control

and inaudible tuning mute. The application of an external processor is possible. Integrated

audio ﬁlters for bass and treble and loudness control function.

The device can be controlled via the fast-mode I2C-bus (400 kHz) and includes

autonomous tuning functions for easy control without microcontroller timing. No manual

alignments are required.

2. Features

nFM Radio Frequency (RF) front-end with large dynamic range

nIntegrated FM channel ﬁlter with controlled bandwidth

nFully integrated FM demodulator

nFully integrated stereo decoder with high immunity for birdy noise

nFM noise blanker with adaptive detection at MPX and level

nSignal quality detection: level, AM wideband, frequency deviation, ultrasonic

noise/adjacent channel

nFM weak signal processing: stereo blend, high cut control and soft mute

nAM RF Automatic Gain Control (AGC) circuit for external cascode AGC and Positive

Intrinsic Negative (PIN) diode AGC

nDual AM noise blanking system

nAM weak signal processing: high cut control and soft mute

nLow phase noise local oscillator

nIn-lock detection for optimized adaptive Phase-Locked Loop (PLL) tuning speed

nCrystal oscillator reference with low harmonics

nInaudible soft slope tuning mute for AM and FM

nSequential state machine supporting each tuning action

nFlexible audio input source selection

TEF6904A

Integrated car radio

Rev. 03 — 20 March 2008 Product data sheet

Product data sheet Rev. 03 — 20 March 2008 2 of 108

NXP Semiconductors TEF6904A

Integrated car radio

nIntegrated audio processing and tone ﬁltering

nTreble, bass and loudness tone control

nVolume, balance, fader and input gain control

nOptional connection of external sound processor, navigation voice or beep input

nAudio controls with Audio Step Interpolation (ASI) for pop-free function

nCompact Disc (CD) dynamics compression

nVolume Unit (VU)-meter audio level read-out

3. Quick reference data

Table 1. Quick reference data

Symbol Parameter Conditions Min Typ Max Unit

Supply voltage

VCC analog supply voltage on pins VCC,

VCCPLL, VCCVCO, VCCRF,

AMMIX2OUT1, AMMIX2OUT2,

MIX1OUT1 and MIX1OUT2

8 8.5 9 V

Supply current in FM mode

ICC total supply current inclusive IV60 - 102 - mA

Supply current in AM mode

ICC total supply current inclusive IV60 -89- mA

AM overall system parameters

ftune AM tuning frequency LW 144 - 288 kHz

MW 522 - 1710 kHz

SW 2.3 - 26.1 MHz

Vsens sensitivity voltage fRF = 990 kHz; m = 0.3;

fmod = 1 kHz; BAF = 2.15 kHz;

(S+N)/N = 26 dB; dummy aerial

15 pF/60 pF

-50- µV

S/N ultimate signal-to-noise ratio 54 58 - dB

THD total harmonic distortion 200 µV < VRF < 1 V; m = 0.8;

fAF = 400 Hz - 0.4 1 %

IP3 3rd-order intercept point ∆f = 40 kHz - 130 - dBµV

FM overall system parameters

ftune FM tuning frequency 65 - 108 MHz

Vsens sensitivity voltage (RF input voltage

at (S+N)/N = 26 dB) ∆f = 22.5 kHz; fmod = 1 kHz;

DEMP = 1; B = 300 Hz to 22 kHz;

measured with 75 Ω dummy

antenna and test circuit

-2- µV

(S+N)/N maximum signal plus noise-to-noise

ratio of MPXAM output voltage Vi= 3 mV; ∆f = 22.5 kHz;

fmod = 1 kHz; DEMP = 1;

B = 300 Hz to 22 kHz; measured

with 75 Ω dummy antenna and test

circuit

-60- dB

THD total harmonic distortion ∆f = 75 kHz - 0.5 1 %

IP3 3rd-order intercept point ∆f = 400 kHz - 120 - dBµV

Product data sheet Rev. 03 — 20 March 2008 3 of 108

NXP Semiconductors TEF6904A

Integrated car radio

[1] The input gain setting ING and the volume setting VOL deﬁne the overall volume. The overall range is limited to −83 dB to +28 dB. For

values > +28 dB the actual value is +28 dB. For overall values < −83 dB the actual value is mute.

4. Ordering information

Stereo decoder path

αcs channel separation fFMMPX = 1 kHz 40 - - dB

S/N signal-to-noise ratio fMPXAMIN = 20 Hz to 15 kHz;

referenced to 1 kHz at 91 % FM

modulation; DEMP = 1

70 - - dB

THD total harmonic distortion FM mode; DEMP = 1; measured

with 15 kHz brick-wall low-pass

ﬁlter; fMPXAMIN = 200 Hz to 15 kHz

- - 0.3 %

Tone/volume control

Vi(max) maximum input voltage THD = 0.2 %; Gvol =−6 dB;

pins INAL, INAR, INAC, INAD,

INBL, INBR, INC and IND

2- - V

THD total harmonic distortion conﬁgured as non-inverting,

single-ended inputs;

faudio = 20 Hz to 10 kHz;

Vi= 1 V (RMS)

- 0.02 0.1 %

Gvol volume/balance gain control see Table 83

maximum setting [1] -20- dB

minimum setting [1] -−75 - dB

Gstep(vol) step resolution - 1 - dB

Gtreble treble gain control TRE[2:0] = 111; TREM = 1 - 14 - dB

TRE[2:0] = 111; TREM = 0 - −14 - dB

Gstep(treble) step resolution gain - 2 - dB

Gbass bass gain control BAS[3:0] = 0111; BASM = 1 - 14 - dB

BAS[3:0] = 0111; BASM = 0 - −14 - dB

Gstep(bass) step resolution gain - 2 - dB

Table 1. Quick reference data

…continued

Symbol Parameter Conditions Min Typ Max Unit

Table 2. Ordering information

Type number Package

Name Description Version

TEF6904AH QFP80 plastic quad ﬂat package; 80 leads (lead length 1.6 mm); body 14 ×14 ×2.7 mm SOT496-1

xxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx x xxxxxxxxxxxxxx xxxxxxxxxx xxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx

xxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxx

xxxxxxxxxxxxxxxx xxxxxxxxxxxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxx x x

Product data sheet Rev. 03 — 20 March 2008 4 of 108

NXP Semiconductors TEF6904A

Integrated car radio

5. Block diagram

Fig 1. Block diagram of TEF6904AH

reset

hold

fast

readhold

008aaa014

77 vco

vco

3pll

pll

i.c.

vcm

vtc

10 to 13

rf rf i.c. dc mix1 if1

18 19 20 21 22 23 26 27 28 29 38 39 40

555653

from/to EXP SEL. 1, 2

646566676869707172, 73, 7475766263

30, 31, 32, 33

iAM

iFM

CPOUT

VCOGND

VCOTNK

VCOFDB

VCCVCO

VTUNE

VCCPLL

PLLGND

i.c.

VTCM

VTC

n.c.

DAAOUT

FMMIX1IN1

FMMIX1IN2

IFMAGC

TRFAGC

VCCRF RFGND IAMAGC

i.c.

VDCPIN

VAMCASFB

VAMCAS AMMIX1REF MIX1OUT2 IF1DEC TAMIFKAGC AMIF2IN

V60

VREF

GND

VCC

LEVEL

SDA

SCL

ADDR

RROUT

LROUT

RFOUT

LFOUT

AGND

INPRINPL

PROUT

PLOUT

INDINCINBRINBLINADINACINARINALn.c.MPXAMIN

MPXAMOUT

XTAL1

XTAL2

n.c.

MIX1OUT1 IFGND IF1IN AMIF2DEC

TEF6904AH

STEREO

DECODER

AM NOISE

DETECTOR

FM NOISE

DETECTOR

NOISE

BLANKER HIGH

CUT

SNC

MULTIPATH,

LEVEL,

ADJACENT CHANNEL,

MODULATION AND

OFFSET

DETECTION

WEAK SIGNAL AND

FM BANDWIDTH

CONTROL LOGIC

HCC

EXP

SEL. 1

INPUT

SELECT

DE-EMPHASIS

50 µs/75 µs

INPUT GAIN,

VOLUME,

BALANCE,

MUTE

LOUDNESS,

BASS,

TREBLE

I2C-BUS

TUNING

STATE

MACHINE

DEMODULATOR

AM IF NOISE

DETECTOR

FM/AM

RF AGC CASCODE

CONTROL

IF COUNT

AUDIO STEP INTERPOLATION

EXP

SEL. 2 F/R

FADER

DIV

fREF

PLL

÷N BAND

÷M

÷2

LO2 90°

soft mute

tuning

mute

ana

vcc

gnd

vref

swap

snc hcc

LO1 90°

ifbw

90°

antenna DAA

LEVEL

USN

MOD

WAM

OFFS

DEMODULATOR

DGND1

i.c.

DGND2dig2

dig1

i.c.

34 35 36 37

AMMIX2OUT1

AMMIX2OUT2

MIXER

LO2 90°

MIXER

LO2

2524

AMMIX1DEC

AMMIX1IN

LO1

MIXER

LO1 90°

Product data sheet Rev. 03 — 20 March 2008 5 of 108

NXP Semiconductors TEF6904A

Integrated car radio

6. Pinning information

6.1 Pinning

6.2 Pin description

Fig 2. Pin conﬁguration for QFP80

TEF6904AH

CPOUT LFOUT

VTUNE RFOUT

VCCPLL LROUT

PLLGND RROUT

i.c. INPL

VTCM INPR

VTC PLOUT

IFMAGC PROUT

TRFAGC ADDR

n.c. SCL

n.c. SDA

n.c. DGND2

n.c. i.c.

DAAOUT i.c.

FMMIX1IN1 DGND1

FMMIX1IN2 LEVEL

VCCRF VCC

RFGND GND

IAMAGC VREF

i.c. V60

VDCPIN VCOGND

VAMCASFB VCOTNK

VAMCAS VCOFDB

AMMIX1DEC VCCVCO

AMMIX1IN MPXAMOUT

AMMIX1REF MPXAMIN

MIX1OUT1 n.c.

MIX1OUT2 n.c.

IFGND n.c.

n.c. INAL

n.c. INAR

n.c. INAC

n.c. INAD

IF1DEC INBL

IF1IN INBR

AMMIX2OUT1 INC

AMMIX2OUT2 IND

TAMIFKAGC XTAL2

AMIF2DEC XTAL1

AMIF2IN AGND

008aaa015

Table 3. Pin description

Symbol Pin Description

CPOUT 1 charge pump output

VTUNE 2 tuning voltage; 3 mA charge pump output

VCCPLL 3 tuning PLL supply voltage

PLLGND 4 PLL ground

i.c. 5 internally connected; leave open

VTCM 6 IF ﬁlter reference voltage

VTC 7 IF ﬁlter center voltage

Product data sheet Rev. 03 — 20 March 2008 6 of 108

NXP Semiconductors TEF6904A

Integrated car radio

IFMAGC 8 PIN diode current FM AGC

TRFAGC 9 FM and AM RF AGC time constant

n.c. 10 not connected

n.c. 11 not connected

n.c. 12 not connected

n.c. 13 not connected

DAAOUT 14 antenna DAA output

FMMIX1IN1 15 FM mixer 1 input 1

FMMIX1IN2 16 FM mixer 1 input 2

VCCRF 17 AM/FM RF supply voltage

RFGND 18 RF ground

IAMAGC 19 PIN diode current AM AGC

i.c. 20 internally connected; leave open

VDCPIN 21 AM PIN diode DC bias voltage

VAMCASFB 22 feedback for cascode AM AGC

VAMCAS 23 cascode AM AGC

AMMIX1DEC 24 AM mixer 1 decoupling

AMMIX1IN 25 AM mixer 1 input

AMMIX1REF 26 AM mixer 1 reference

MIX1OUT1 27 AM and FM mixer 1 output 1 at IF1

MIX1OUT2 28 AM and FM mixer 1 output 2 at IF1

IFGND 29 IF ground

n.c. 30 not connected

n.c. 31 not connected

n.c. 32 not connected

n.c. 33 not connected

IF1DEC 34 AM and FM mixer 2 decoupling

IF1IN 35 AM and FM mixer 2 input

AMMIX2OUT1 36 AM mixer 2 output 1 at IF2

AMMIX2OUT2 37 AM mixer 2 output 2 at IF2

TAMIFKAGC 38 AM IF AGC and FM keyed AGC time constant

AMIF2DEC 39 AM IF2 input decoupling

AMIF2IN 40 AM IF2 input

V60 41 input for FM ﬁlter and demodulator supply current

VREF 42 reference voltage for noise decoupling

GND 43 ground

VCC 44 8.5 V supply voltage

LEVEL 45 AM and FM level voltage output

DGND1 46 digital ground 1

i.c. 47 internally connected; leave open

i.c. 48 internally connected; leave open

Table 3. Pin description

…continued

Symbol Pin Description

Product data sheet Rev. 03 — 20 March 2008 7 of 108

NXP Semiconductors TEF6904A

Integrated car radio

7. Functional description

7.1 FM mixer 1

The FM quadrature mixer 1 converts FM RF (65 MHz to 108 MHz) to an IF frequency of

10.7 MHz. The FM mixer provides image rejection and a large dynamic range. Low and

high injection Local Oscillator (LO) can be selected via the I2C-bus.

DGND2 49 digital ground 2

SDA 50 I2C-bus SDA input and output

SCL 51 I2C-bus SCL input

ADDR 52 I2C-bus slave address select input

PROUT 53 audio output to external processor; right channel

PLOUT 54 audio output to external processor; left channel

INPR 55 audio input from external processor; right channel

INPL 56 audio input from external processor; left channel

RROUT 57 right rear audio output

LROUT 58 left rear audio output

RFOUT 59 right front audio output

LFOUT 60 left front audio output

AGND 61 analog ground

XTAL1 62 crystal oscillator 1

XTAL2 63 crystal oscillator 2

IND 64 audio input D, signal input

INC 65 audio input C, common mode or signal input

INBR 66 audio input B, right channel

INBL 67 audio input B, left channel

INAD 68 audio input A, right channel inverted (or other options)

INAC 69 audio input A, left channel inverted (or other options)

INAR 70 audio input A, right channel

INAL 71 audio input A, left channel

n.c. 72 not connected

n.c. 73 not connected

n.c. 74 not connected

MPXAMIN 75 MPX and AM audio input to radio processing

MPXAMOUT 76 MPX and AM audio output from tuner part

VCCVCO 77 Voltage-Controlled Oscillator (VCO) supply voltage

VCOFDB 78 VCO feedback

VCOTNK 79 VCO tank circuit

VCOGND 80 VCO ground

Table 3. Pin description

…continued

Symbol Pin Description

Product data sheet Rev. 03 — 20 March 2008 8 of 108

NXP Semiconductors TEF6904A

Integrated car radio

7.2 FM RF AGC

AGC detection at the FM front-end mixer input with programmable threshold. When the

threshold is exceeded, the PIN diode drive circuit sources a current to an external PIN

diode circuit, keeping the RF signal level constant. Keyed AGC function is selectable via

the I2C-bus and uses the in-band level information derived from the limiter. The AGC PIN

diode drive circuit can optionally deliver a ﬁxed current; this local mode can be used for

search tuning on absolute RF levels. In AM mode, the FM AGC PIN diode drive circuit can

be set to source a ﬁxed current into the external FM PIN diode circuitry.

7.3 FM mixer 2

The FM quadrature mixer 2 converts 10.7 MHz IF1 to 450 kHz IF2 and includes image

rejection with the integrated channel ﬁlter. Two gain settings can be selected to

compensate for high ceramic ﬁlter insertion loss.

7.4 FM IF2 channel ﬁlter

The order and dynamic range of the FM IF2 channel ﬁlter is designed for operation with

only one external ceramic ﬁlter. The ﬁlter characteristic is optimized to combine high

selectivity with low distortion. The bandwidth of the ﬁlter can be set to a range of ﬁxed

settings or automatically via the bandwidth control algorithm. When the automatic mode is

selected the bandwidth depends on the signal conditions.

7.5 FM limiter and level detection

The limiter ampliﬁes the IF ﬁlter output signal, removes AM modulations from the IF signal

and supplies a well deﬁned signal for the FM demodulator. From the limiter also the Radio

Signal Strength Information (RSSI) is derived whichis converted to a suitable level voltage

with minimum temperature drift.

7.6 FM demodulator

The fully integrated FM demodulator converts the IF signal from the limiter to the

FM multiplex output signal with low distortion.

7.7 Center frequency and bandwidth tuning and center frequency DAA

The center frequency as well as the bandwidth of both the IF ﬁlter and demodulator are

coupled to the crystal reference frequency. A coarse alignment (IFCAP) sets the circuit

operating range and the center frequency ﬁne adjustment is achieved with a 6-bit

alignment (IFCF).

7.8 Bandwidth control algorithm

The bandwidth of the IF ﬁlter can be selected with 5 bits, directly via I2C-bus or

automatically via the bandwidth control algorithm. The bandwidth control algorithm

detects the amount of adjacent channel interference, the deviation of the desired signal,

detuning, multipath and signal strength to deﬁne the optimum bandwidth setting of the

IF ﬁlter. Flexibility on the algorithm settings is provided via the I2C-bus control.

Product data sheet Rev. 03 — 20 March 2008 9 of 108

NXP Semiconductors TEF6904A

Integrated car radio

7.9 VCO and dividers

The varactor tuned LC oscillator together with the dividers provides the local oscillator

signal for both AM and FM front-end mixers. The VCO has an operating frequency of

approximately 160 MHz to 250 MHz. In FM mode the VCO frequency is divided by 2 or 3.

These dividers generate in-phase and quadrature-phase output signals used in the

FM front-end mixer for image rejection. In AM mode the VCO frequency is divided by 6, 8,

10, 16 or 20 depending on the selected AM band. The amplitude of the VCO is controlled

by a digital AGC to ensure a safe oscillation start-up at a wide range of the loaded Q.

7.10 Crystal oscillator

The crystal oscillator provides a 20.5 MHz signal. A divider-by-two generates in-phase

and quadrature-phase mixer frequencies for the conversion from IF1 to IF2 including

image rejection. The reference divider generates from the crystal frequency various

reference frequencies for the tuning PLL. Also timing signals for the sequential machine

as well as references for the integrated FM channel ﬁlter, the stereo decoder and the

integrated audio ﬁlters are derived from the crystal reference.

7.11 Tuning PLL

The tuning PLL locks the VCO frequency divided by the programmable divider ratio to the

reference frequency. Due to the combination of different charge pump signals in the

PLL loop ﬁlter, the loop parameters are adapted dynamically. Tuning to different

RF frequencies is done by changing the programmable divider ratio. The tuning step size

is selected with the reference frequency divider setting.

7.12 Antenna DAA

For FM operation the antenna Digital Auto Alignment (DAA) measures the VCO tuning

voltage and multiplies it with a factor deﬁned by the 7-bit DAA setting to generate a tuning

voltage for the FM antenna tank circuit (RF selectivity). In AM mode the DAA setting

controls a ﬁxed voltage.

7.13 AM RF AGC control

The AM front-end is designed for the application of an external Junction Field Effect

Transistor (JFET) low noise ampliﬁer with cascode AGC and PIN diode AGC both

controlled by an integrated AGC control circuit. Four AGC thresholds of the detector at the

ﬁrst mixer input are selectable via I2C-bus. Detectors at the RF mixer input and at the

AMIF2 input prevent undesired overload (see Figure 39). AGC information can be read

out via I2C-bus. The PIN diode current drive circuit includes a pull-up current source for

reverse biasing of the PIN diode, when the AGC is not active to achieve a low parasitic

capacitance.

7.14 AM mixer 1

The large dynamic range AM mixer converts AM RF (144 kHz to 26.1 MHz) to an IF

frequency of 10.7 MHz.

Product data sheet Rev. 03 — 20 March 2008 10 of 108

NXP Semiconductors TEF6904A

Integrated car radio

7.15 AM IF noise blanker

The spike detection for the AM IF noise blanker is at the output of the AM front-end mixer.

Blanking is realized at the second AM mixer.

7.16 AM IF AGC ampliﬁer and demodulator

The 450 kHz IF2 signal after the ceramic channel selection ﬁlter is ampliﬁed by the

IFAGC ampliﬁer and demodulated.

7.17 AM level detection

The IF2 signal used for AM IF AGC and demodulation is also used in the limiter circuit for

in-band level detection.

7.18 AM and FM level DAA

The start and slope of the level detector output are programmable to achieve level

information independent of gain spread in the signal channel.

7.19 AM and FM IF counter

The output signal from the limiter is used for IF counting in both AM and FM.

7.20 Tuning mute

A soft slope tuning mute is controlled by the sequential machine for different tuning

actions to eliminate audible effects of tuning and band switching.

7.21 FM stereo decoder

A low-pass ﬁlter provides additional suppression of high frequency interferences at the

stereo decoder input and the necessary signal delay for FM noise blanking.

The MPX signal is decoded in the stereo decoder part. An integrated oscillator and pilot

PLL is used for the regeneration of the 38 kHz subcarrier. The required 19 kHz

and 38 kHz signals are generated by division of the oscillator output signal in logic

circuitry.

By means of a 19 kHz quadrature detector the pilot PLL oscillator frequency is locked to

the incoming 19 kHz stereo pilot. A pilot level voltage derived from a 19 kHz in-phase

detector is used for stereo detection and for generation of an anti-phase 19 kHz signal to

remove the pilot tone from the audio signal.

The signal is then decoded in the decoder part. The L-R side signal is demodulated using

the 38 kHz subcarrier and combined with the main signal to the left and right audio

channel. A ﬁne adjustment is done by adjusting the gain of the L-R signal. A smooth mono

to stereo takeover is achieved by controlling the efﬁciency of the matrix by the Stereo

Noise Control (SNC) signal from the weak signal processing block.

Product data sheet Rev. 03 — 20 March 2008 11 of 108

NXP Semiconductors TEF6904A

Integrated car radio

7.22 FM and AM AF noise blanker

The FM or AM tuner operation selects between two noise blanker operations optimized for

FM or AM ignition noise suppression.

In FM mode the noise blanker operates as a modiﬁed sample and hold circuit with

ultrasonic noise detection on MPX and detection of noise spikes on level.

In AM mode the audio signal is muted during the interference pulse triggered by slew-rate

detection of the audio signal.

7.23 Fixed high cut and high cut control

The high cut part is a low-pass ﬁlter circuit with seven bandwidth settings. The cut-off

frequencies of the ﬁlter curves can be selected to match different application requirements

(ﬁxed high cut).

The high cut circuit also provides a dynamic control of the ﬁlter response, the High Cut

Control (HCC). This function is controlled by the HCC signal from the weak signal

processing.

7.24 De-emphasis

The signal passes the low-pass ﬁlter de-emphasis block and is then fed to the source

selector. The de-emphasis time constant can be selected between the standards of 50 µs

and 75 µs.

7.25 Weak signal processing

The weak signal processing block detects quality degradations in the incoming signal and

controls the processing of the audio signal accordingly. The weak signal processing block

has three different quality criteria: The average value of the level voltage, AM components

on the level voltage (WAM = wideband AM) and high frequency components in the MPX

signal (USN = ultrasonic noise).

In the weak signal processing block these signals are combined in speciﬁc ways and used

for the generation of control signals for soft mute, stereo blend (SNC = stereo noise

control) and HCC. Detector time constants of soft mute, HCC and SNC can be selected

independently.

In AM mode, soft mute and HCC are controlled by the average value of the level voltage.

7.26 Audio step interpolation

The tone/volume blocks of source selector, volume/balance, bass/loudness, fader and

output mute include the Audio Step Interpolation (ASI) function. This minimizes audible

pops by smoothing the transitions in the audio signal during the switching of the controls.

7.27 Source selector

The source selector selects one out of several input sources:

•One internal stereo signal (AM/FM tuner)

•Eight input pins allow many combinations of external sources by means of ﬂexible

input selection

Product data sheet Rev. 03 — 20 March 2008 12 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Four of the eight input pins can connect to:

–1 stereo signal with differential input (CD-symmetrical)

–1 stereo signal with common mode rejection (CD-2) and 1 mono signal (e.g.

BEEP)

–2 stereo signals (AUX and AUX-2)

–1 stereo signal (AUX) and 2 mono signals (e.g. NAV and BEEP)

The other four input pins can connect to the same options and allow additional

connection to:

–1 stereo signal and 1 mono signal with common mode rejection or differential input

(PHONE)

Alternatively the 8 input pins can connect to 2 stereo signals with common mode rejection

and 1 stereo signal or 1 mono signal with common mode rejection or differential input.

7.28 VU-meter read

The input audio level of external sources can read out via the I2C-bus. Audio level

information is available on a logarithmic scale. In radio mode the AM or FM modulation

index is available in the same way.

7.29 Volume and balance

The volume/balance control is used for volume setting and also for balance adjustment.

The control range of the volume/balance control is between +20 dB and −75 dB in steps

of 1 dB.

7.30 CD compression

Dynamic volume compression is available for external input sources. This option is

generally used for audio from CD or other digital formats to reduce the very high dynamic

range of these signals into a range suitable for the car environment.

7.31 Bass

The bass tone control stage controls the low audio frequencies with a modiﬁed shelve

curve response. The control range is between +14 dB and −14 dB in steps of 2 dB. Four

different ﬁlter cut-off frequencies can be selected.

7.32 Treble

The treble tone control stage controls the high audio frequencies with a shelve curve

response. The control range is between +14 dB and −14 dB in steps of 2 dB. Four

different ﬁlter cut-off frequencies can be selected.

7.33 Loudness

An integrated loudness function can be activated which controls bass and treble in relation

to the user volume setting. The control range of the bass frequencies is limited to 20 dB

and the optional treble range to 4 dB. Different volume ranges can be selected for the

loudness control.

Product data sheet Rev. 03 — 20 March 2008 13 of 108

NXP Semiconductors TEF6904A

Integrated car radio

7.34 Fader

The fader is located at the end of the tone/volume chain. The balance between the front

and rear channel can be controlled by attenuation of either the front or the rear channel.

Control range is 0 dB to −64 dB with a step size of 1 dB. Optionally the fader attenuation

can be activated for front and rear channels together.

7.35 External processor I/O

The tone control output signal is available on two pins. Furthermore two input pins allow

connection to the fader block for front and rear line outputs, or alternatively for rear output

only. This allows connection of an external sound processing circuit for equalizing,

surround sound or sound stage positioning. Also input or mixing of an external signal

source like navigation voice or beep can be realized.

8. I2C-bus protocol

SDA and SCL HIGH and LOW internal thresholds are speciﬁed according to both 2.5 V

and 3.3 V I2C-bus, however also SDA and SCL signals froma5Vbusaresupported. The

maximum I2C-bus communication speed is 400 kbit/s in accordance with the I2C-bus fast

mode speciﬁcation.

Fig 3. Write mode

ACK-s ACK-s

DATASLAVE ADDRESS W

data transferred

(n bytes + acknowledge)

001aad051

PS ACK-s

MSA

Fig 4. Read mode

DATA

ACK-s ACK-m DATA NASLAVE ADDRESS R

001aad049

data transferred

(n − 1 bytes + acknowledge)

Table 4. Description of I2C-bus format

Code Description

S START condition

Slave address W 1100 0000b for pin ADDR grounded

1100 0010b for pin ADDR ﬂoating

Slave address R 1100 0001b for pin ADDR grounded

1100 0011b for pin ADDR ﬂoating

ACK-s acknowledge generated by the slave

ACK-m acknowledge generated by the master

NA not acknowledge generated by the master

Product data sheet Rev. 03 — 20 March 2008 14 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.1 Read mode

Application restriction to use the read mode: Read transmissions should not be

stopped after read byte 4 (IFBW) since this will disturb level read-out, weak signal

processing and bandwidth control. Read transmission can be stopped after any of the

other read bytes 0 to 3, 5 or 6.

The read data is loaded into the I2C-bus output register at the ACK clock pulse preceding

the data byte.

8.1.1 Read mode: data byte IFCOUNTER

MSA mode and subaddress byte

Data data byte

P STOP condition

Table 4. Description of I2C-bus format

…continued

Code Description

Table 5. Read register overview

Data byte Name Reference

0 IFCOUNTER Section 8.1.1

1 LEVEL Section 8.1.2

2 USN/WAM Section 8.1.3

3 MOD Section 8.1.4

4 IFBW Section 8.1.5

5ID

Section 8.1.6

6 TEMP Section 8.1.7

Table 6. IFCOUNTER - format of data byte 0

7 6 5 4 3 2 1 0

IFCM1 IFCM0 IFCS IFCA IFC3 IFC2 IFC1 IFC0

Table 7. IFCOUNTER - data byte 0 bit description

Bit Symbol Description

7 and 6 IFCM[1:0] IF counter mode; IFCM reads 00 immediately after I2C-bus start of

PRESET, SEARCH, AFU, JUMP or CHECK until the ﬁrst IFC result of the

new tuning is available.

00 = no new counter result available (IFC value is previous result or

reset state)

01 = new counter result available (IFC value is new result)

10 = counter result from AF update (IFC value is AF result, value is

held until I2C-bus read). Also the detector information of LEV, USN,

WAM and MOD shows AF update results.

11 = Power-On Reset (POR) or undeﬁned state of the state machine is

detected. The I2C-bus data is reset to POR state.

5 IFCS IF counter sign

0 = the IF counter result indicates a positive RF frequency error

1 = the IF counter result indicates a negative RF frequency error

Product data sheet Rev. 03 — 20 March 2008 15 of 108

NXP Semiconductors TEF6904A

Integrated car radio

After a tuning action, which is activated by the state machine, the IF counter is reset at

that moment when tuning is established (PLL in-lock). The ﬁrst counter result is available

from 2 ms after reset. For FM further results can be obtained from 4 ms, 8 ms, 16 ms and

32 ms after reset, the increasing count time attenuates inﬂuence of FM modulation on the

counter result. After this, the counter continues at the maximum count time of 32 ms (see

Figure 5). For AM the count time is ﬁxed to 2 ms and results are available every 2 ms.

After AF Update (AFU) sampling the IF counter read value is held (IFCM = 10) (see

Figure 6,Figure 17 and Figure 18) for easy I2C-bus read-out. The counter itself remains

active in the background in 2 ms count time mode. The IF counter data hold is released

after I2C-bus read.

IFCM reads 00 immediately after I2C-bus start of PRESET, SEARCH, AFU, JUMP or

CHECK until the ﬁrst new tuning IFC result is available.

4 IFCA IF counter accuracy

0 = IF counter result with 1 kHz resolution in FM mode and 0.5 kHz

resolution in AM mode

1 = IF counter result with 8 kHz resolution in FM mode and 4 kHz

resolution in AM mode

3 to 0 IFC[3:0] IF counter result; see Table 8

Table 7. IFCOUNTER - data byte 0 bit description

…continued

Bit Symbol Description

Table 8. IF counter result

IFC3 IFC2 IFC1 IFC0 Deviation from nominal value in FM Deviation from nominal value in AM

IFCA = 0 IFCA = 1 IFCA = 0 IFCA = 1

0 0 0 0 0 kHz to 1 kHz reset state 0 kHz to 0.5 kHz reset state

0 0 0 1 1 kHz to 2 kHz - 0.5 kHz to 1 kHz -

0 0 1 0 2 kHz to 3 kHz 16 kHz to 24 kHz 1 kHz to 1.5 kHz 8 kHz to 12 kHz

0 0 1 1 3 kHz to 4 kHz 24 kHz to 32 kHz 1.5 kHz to 2 kHz 12 kHz to 16 kHz

0 1 0 0 4 kHz to 5 kHz 32 kHz to 40 kHz 2 kHz to 2.5 kHz 16 kHz to 20 kHz

0 1 0 1 5 kHz to 6 kHz 40 kHz to 48 kHz 2.5 kHz to 3 kHz 20 kHz to 24 kHz

0 1 1 0 6 kHz to 7 kHz 48 kHz to 56 kHz 3 kHz to 3.5 kHz 24 kHz to 28 kHz

0 1 1 1 7 kHz to 8 kHz 56 kHz to 64 kHz 3.5 kHz to 4 kHz 28 kHz to 32 kHz

1 0 0 0 8 kHz to 9 kHz 64 kHz to 72 kHz 4 kHz to 4.5 kHz 32 kHz to 36 kHz

1 0 0 1 9 kHz to 10 kHz 72 kHz to 80 kHz 4.5 kHz to 5 kHz 36 kHz to 40 kHz

1 0 1 0 10 kHz to 11 kHz 80 kHz to 88 kHz 5 kHz to 5.5 kHz 40 kHz to 44 kHz

1 0 1 1 11 kHz to 12 kHz 88 kHz to 96 kHz 5.5 kHz to 6 kHz 44 kHz to 48 kHz

1 1 0 0 12 kHz to 13 kHz 96 kHz to 104 kHz 6 kHz to 6.5 kHz 48 kHz to 52 kHz

1 1 0 1 13 kHz to 14 kHz 104 kHz to 112 kHz 6.5 kHz to 7 kHz 52 kHz to 56 kHz

1 1 1 0 14 kHz to 15 kHz 112 kHz to 120 kHz 7 kHz to 7.5 kHz 56 kHz to 60 kHz

1 1 1 1 15 kHz to 16 kHz ≥120 kHz 7.5 kHz to 8 kHz ≥60 kHz

Product data sheet Rev. 03 — 20 March 2008 16 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Fig 5. IF counter in FM mode after tuning

001aab785

2 ms 2 ms 4 ms 8 ms 16 ms 32 ms32 ms

tuning

f1 f2

time

I2C-bus

2 ms

4 ms

8 ms

16 ms

32 ms 32 ms 32 ms

reset f2

counter time

Fig 6. IF counter in FM mode during and after AF update

001aab786

tuning for AF update

2 ms 2 ms 16 mstime

I2C-bus

2 ms

4 ms

8 ms

16 ms

32 ms

2 ms

2 ms 2 ms 4 ms 8 ms

hold of counter result of f2 until read-out

read-out of counter result f2

2 ms 2 ms 2 ms 2 ms 2 ms 2 ms 2 ms

2 ms

reset

counter time

reset

f1 f2 f2 f1

Product data sheet Rev. 03 — 20 March 2008 17 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.1.2 Read mode: data byte LEVEL

After AF update sampling the level read value is held (indicated by IFCM = 10) for easy

I2C-bus read-out. The level detector remains active in the background. The LEV data hold

is released after I2C-bus read.

To reduce the inﬂuence of modulation in AM mode the LEV information is additionally

ﬁltered by a slow 60 ms detector. Fast level information is made available during

AF update and check tuning.

For standard operation the following level alignment (byte LEVELALGN; see Table 43) is

used:

FM and AM level slope; ∆LEV = 51 (∆VLEVEL = 0.80 V) at ∆VRF = 20 dB (measured at

VRF = 200 µVand VRF =20µV)

FM mode level start; LEV = 78 (VLEVEL = 1.47 V) at VRF =20µV

AM mode level start; LEV = 63 (VLEVEL = 1.24 V) at VRF =20µV

Table 9. LEVEL - format of data byte 1

7 6 5 4 3 2 1 0

LEV7 LEV6 LEV5 LEV4 LEV3 LEV2 LEV1 LEV0

Table 10. LEVEL - data byte 1 bit description

Bit Symbol Description

7 to 0 LEV[7:0] level detector; this byte indicates the LEVEL voltage between

0.25 V (LEV = 0) and 4.25 V (LEV = 255) from the tuner part;

VLEVEL =1⁄64LEV[7:0] + 0.25 V; see Figure 7

Fig 7. FM RF antenna input signal and level output voltage

VANT (mV)

10−4102

10110−310−1

10−2

001aab521

VLEVEL

(V)

Product data sheet Rev. 03 — 20 March 2008 18 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.1.3 Read mode: data byte USN/WAM

After AF update sampling the USN and WAM read value is held (indicated by IFCM = 10)

for easy I2C-bus read-out. The USN and WAM detectors remain active in the background.

The USN and WAM data hold is released after I2C-bus read.

8.1.4 Read mode: data byte MOD

Table 11. USN/WAM - format of data byte 2

7 6 5 4 3 2 1 0

USN3 USN2 USN1 USN0 WAM3 WAM2 WAM1 WAM0

Table 12. USN/WAM - data byte 2 bit description

Bit Symbol Description

7 to 4 USN[3:0] ultrasonic noise detector; this value indicates the USN content of the

MPX audio signal; see Figure 24

3 to 0 WAM[3:0] wideband AM detector; this value indicates the WAM content of the

LEVEL voltage; see Figure 24

Table 13. MOD - format of data byte 3

7 6 5 4 3 2 1 0

MOD4 MOD3 MOD2 MOD1 MOD0 STIN TAS1 TAS0

Table 14. MOD - data byte 3 bit description

Bit Symbol Description

7 to 3 MOD[4:0] modulation detector; this value indicates the audio modulation; see

Table 15

FM between 0 kHz and 150 kHz FM deviation

AM between 0 % and 200 % modulation

FM offset detector; a read value of 31 indicates offset detection. The

offset detector is part of the FM bandwidth control algorithm and detects

adjacent channel breakthrough.

VU-meter; when an external audio source is selected and VU-meter read

is active (see subaddress 17h; see Table 98) MOD indicates the audio

input level (RMS) between 0 V and 2 V; see Table 15.

2 STIN stereo indicator; this bit indicates if a stereo pilot signal has been

detected

0 = no pilot signal detected

1 = pilot signal is detected and the FM stereo decoder is activated

1 and 0 TAS[1:0] Tuning action state; state machine information. The signal TAS informs

about internal control functions of the tuner action state machine. This

way the progress of tuner actions can be monitored by the

microcontroller.

00 = inactive

01 = starting mute

10 = PLL tuning

11 = tuning ready with mute active

Product data sheet Rev. 03 — 20 March 2008 19 of 108

NXP Semiconductors TEF6904A

Integrated car radio

The indicated amplitude levels are approximate values.

In the case of FM radio, carrier modulation is measured (MPX FM deviation). Timing is

ﬁxed with fast 30 ms release time. Depending upon reception conditions and internal

offsets small modulation levels may be indicated as MOD[4:0] = 0 0000b. After AF update

sampling the MOD read value is held (indicated by IFCM = 10) for easy I2C-bus read-out.

The MOD detector remains active in the background. The MOD data hold is released after

I2C-bus read.

In the case of AM radio, carrier modulation is measured (AM). Timing is ﬁxed with fast

30 ms release time. Modulation may exceed 100 % in cases of special modulation

schemes as used by some stations. After AF update sampling, the MOD read value is

held (indicated by IFCM = 10) for easy I2C-bus read-out. The MOD detector remains

active in the background. The MOD data hold is released after I2C-bus read.

With external source selection and VU-meter mode disabled (AVUM = 0 and COMP = 0)

FM or AM modulation is indicated equal to radio mode.

Table 15. MOD detector

MOD4 MOD3 MOD2 MOD1 MOD0 FM radio ∆f AM radio m VU External source

0 0 0 0 0 < 1.5 kHz < 2 % - < 0.02 V

0 0 0 0 1 1.5 kHz 2 % −34 dB 0.02 V

000103 kHz 4% −28 dB 0.04 V

0 0 0 1 1 4.5 kHz 6 % −24 dB 0.06 V

001006 kHz 8% −22 dB 0.08 V

0 0 1 0 1 7.5 kHz 10 % −20 dB 0.1 V

0 0 1 1 0 9.5 kHz 13 % −18 dB 0.13 V

0 0 1 1 1 12 kHz 16 % −16 dB 0.16 V

0 1 0 0 0 15 kHz 20 % −14 dB 0.2 V

0 1 0 0 1 19 kHz 25 % −12 dB 0.25 V

0 1 0 1 0 24 kHz 32 % −10 dB 0.32 V

0 1 0 1 1 30 kHz 40 % −8 dB 0.4 V

0 1 1 0 0 38 kHz 50 % −6 dB 0.5 V

0 1 1 0 1 47 kHz 63 % −4 dB 0.63 V

0 1 1 1 0 60 kHz 80 % −2 dB 0.8 V

0 1 1 1 1 75 kHz 100 % 0 dB 1 V

1 0 0 0 0 95 kHz 125 % 2 dB 1.25 V

1 0 0 0 1 120 kHz 160 % 4 dB 1.6 V

1 0 0 1 0 150 kHz 200 % 6 dB 2 V

10011- - - -

:::::: : : :

11110- - - -

1 1 1 1 1 offset

detection ---

Product data sheet Rev. 03 — 20 March 2008 20 of 108

NXP Semiconductors TEF6904A

Integrated car radio

With external source selection and VU-meter mode enabled (AVUM=1orCOMP = 1) the

audio input level of the external source is indicated (i.e. the audio level as found on the line

input pins). For stereo signals left and right channels are combined for MOD read

(0.5 ×L+0.5× R). VU-meter timing is deﬁned by setting HTC. For AVUM control see

subaddress 17h; see Table 98. In case of AF update sampling the AM or FM modulation

value is indicated with data hold (indicated by IFCM = 10) for easy I2C-bus read-out. The

MOD data hold is released after I2C-bus read and VU-meter indication continues.

8.1.5 Read mode: data byte IFBW

8.1.6 Read mode: data byte ID

Table 16. IFBW - format of data byte 4

7 6 5 4 3 2 1 0

RAGC1 RAGC0 ASIA IFBW4 IFBW3 IFBW2 IFBW1 IFBW0

Table 17. IFBW - data byte 4 bit description

Bit Symbol Description

7 and 6 RAGC[1:0] RF AGC indicator; PIN diode current on pins IAMAGC or IFMAGC

00 =

FM: < 0.05 mA

AM: < 0.1 mA

01 =

FM: 0.05 mA to 0.5 mA

AM: 0.1 mA to 0.5 mA

10 = 0.5 mA to 2.5 mA

11 = > 2.5 mA

5 ASIA ASI active; this bit indicates activity of the audio step interpolation

function

0 = ASI is not active

1 = ASI step is in progress

4 to 0 IFBW[4:0] FM IF ﬁlter bandwidth control; 57 kHz (0 0000) to 165 kHz (1 1111). The

bandwidth read data equals the write data deﬁnition (at DYN = 0; see

Table 28).

Table 18. ID - format of data byte 5

7 6 5 4 3 2 1 0

IFCAPG - - - - ID2 ID1 ID0

Table 19. ID - data byte 5 bit description

Bit Symbol Description

7 IFCAPG IF ﬁlter gear; read value is used for IFCAP adjustment (byte IFCAP);

see Table 47

6 to 3 - reserved

2 to 0 ID[2:0] device type identiﬁcation 011 = TEF6904A

Product data sheet Rev. 03 — 20 March 2008 21 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.1.7 Read mode: data byte TEMP

8.2 Write mode

The device is controlled by the I2C-bus. After the Integrated Circuit (IC) address the MSA

byte contains the control of the tuning action via the bits MODE[2:0] and subaddressing

via bits SA[4:0] (see Figure 8).

All circuits are controlled by the CONTROL register. Any data change in the CONTROL

subaddress range 00h to 05h includes data that may lead to audible disturbance when

changed. Therefore the subaddress range 00h to 05h is not loaded in the CONTROL

of tuning actions and mute control, freeing the microcontroller from cumbersome controls

and timings. The subaddress range of 06h onwards does not contain such critical data.

I2C-bus information in this range will be loaded in the CONTROL register directly (at

acknowledge of each byte).

Controlled by a state machine the BUFFER data will be loaded in the CONTROL register

for new settings. However at the same time the CONTROL data is loaded in the BUFFER

previous data remains available in the BUFFER register (see Figure 10,Figure 11 and

Figure 12).

Via MODE several operational modes can be selected for the state machine. MODE offers

all standard tuning actions as well as generic control for ﬂexibility. The state machine

controls the tuner directly by controlling the I2C-bus data. Internal circuits like the IF

counter, mute and weak signal processing are controlled complementary to the tuner

action. The state machine operation starts at the end of transmission (P = STOP). In case

a previous action is still active this is overruled and the new action deﬁned by MODE is

started immediately.

When only the address byte is transmitted no action is started and no setting is changed,

this can be used to test the presence of the device on the bus. To minimize the I2C-bus

transmission time only bytes that include data changes need to be written. Following the

MSA byte the transmission can start at any given data byte deﬁned by the subaddress

(SA) bits. In case of MODE = preset, search or load the value of buffered data that is not

overwritten by the new transmission will equal the control register content, i.e. the current

tuner state. Instead in case of MODE = buffer, AF update, jump, check or end any not

overwritten BUFFER data remains to be the existing BUFFER register content, i.e. the

previous tuner state.

Table 20. TEMP - format of data byte 6

7 6 5 4 3 2 1 0

TEMP7 TEMP6 TEMP5 TEMP4 TEMP3 TEMP2 TEMP1 TEMP0

Table 21. TEMP - data byte 6 bit description

Bit Symbol Description

7 to 0 TEMP[7:0] on-chip temperature; 1 step ≈ 1 K; relative indication

Product data sheet Rev. 03 — 20 March 2008 22 of 108

NXP Semiconductors TEF6904A

Integrated car radio

After power-on reset, all registers, including the reserved registers, should be initialized

with their default settings (see Table 22) using a preset mode tuning action (see Table 25).

The tuning mute circuit is muted. An action of the state machine is required to de-mute the

circuit, for this purpose preset mode (bits MODE[2:0] = 001) is best ﬁtted since it assures

fast settling of all parameters before mute is released.

Table 22. Write mode subaddress overview

Subaddress Name Default Reference

00h BANDWIDTH 1111 1110 Section 8.2.2

01h PLLM 0000 1000 Section 8.2.3

02h PLLL 0111 1110 Section 8.2.3

03h DAA 0100 0000 Section 8.2.4

04h AGC 0000 0000 Section 8.2.5

05h BAND 0010 0000 Section 8.2.6

06h LEVELALGN 1000 0100 Section 8.2.8

07h IFCF 0010 0000 Section 8.2.9

08h IFCAP 0000 1000 Section 8.2.10

09h ACD 0100 1010 Section 8.2.11

0Ah SENSE 1000 0101 Section 8.2.12

0Bh TIMING 0110 0110 Section 8.2.13

0Ch SNC 0111 0100 Section 8.2.14

0Dh HIGHCUT 0110 1111 Section 8.2.15

0Eh SOFTMUTE 0110 1010 Section 8.2.16

0Fh RADIO 0001 1010 Section 8.2.17

10h INPUT 0000 1010 Section 8.2.18

11h VOLUME 0011 0000 Section 8.2.19

12h TREBLE 0000 1100 Section 8.2.20

13h BASS 0000 1100 Section 8.2.21

14h FADER 0000 0000 Section 8.2.22

15h OUTPUT 0000 1111 Section 8.2.23

16h BALANCE 1000 0000 Section 8.2.24

17h LOUDNESS 0000 1100 Section 8.2.25

18h POWER 0000 0110 Section 8.2.26

19h to 1Eh reserved 0000 0000 Section 8.2.27

1Fh TEST 0000 0000 Section 8.2.28

Product data sheet Rev. 03 — 20 March 2008 23 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Fig 8. I2C-bus and state machine control

001aab522

IF COUNTER

LOAD

PRESET,

AFU, JUMP,

CHECK SWAP PRELOAD

WS DETECTORS

WS PROCESSING

TUNING MUTE

BUFFER REGISTER

SA = 00h to 05h

I2C-BUS

MODE DECODER

STATE MACHINE

CONTROL REGISTER

SA = 00h to 05h

SA = 00h to 05hMODE

SA = 06h to 1Fh

TUNER AND AUDIO CIRCUIT

Product data sheet Rev. 03 — 20 March 2008 24 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Fig 9. Write without state machine action, no preload, no register swap

001aab523

address MSA

byte 1

byte 2

byte 3

byte 4

byte 5

byte 2 byte 3 byte 4 P

BUFFER

CONTROL

byte 0

byte 1

byte 2

byte 3

byte 4

byte 5

byte 0

new

current

new

MODE = buffer or end

SA = 2

current

current current

state machine stop

for MODE = end only

Product data sheet Rev. 03 — 20 March 2008 25 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Fig 10. Write with state machine action and swap, no preload

001aab524

address MSA

byte 1

byte 2

byte 3

byte 4

byte 5

byte 2 byte 3 byte 4 byte 5 P

swap

BUFFER

CONTROL

byte 0

byte 1

byte 2

byte 3

byte 4

byte 5

byte 0

new

current

MODE = AFU, jump or check

SA = 2

state machine start

Product data sheet Rev. 03 — 20 March 2008 26 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Fig 11. Write with state machine action, preload and swap

address MSA

byte 1

byte 2

byte 3

byte 4

byte 5

byte 3 byte 4 byte 5 P

BUFFER

CONTROL

byte 0

new

current

MODE = preset or search

SA = 3

preload

current

state machine start

current

byte 1 current current

byte 2 current current

byte 3 current new

byte 4 current new

byte 5 current new

001aab525

swap

Product data sheet Rev. 03 — 20 March 2008 27 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.1 Mode and subaddress byte for write

Fig 12. Write without state machine action, with preload and swap

byte 1

byte 2

byte 3

byte 4

byte 5

BUFFER

CONTROL

byte 0

byte 1

byte 2

byte 3

byte 4

byte 5

byte 0

new

current

address MSA byte 3 byte 4 byte 5 P

MODE = load

SA = 3

preload

001aab526

swap

Table 23. MSA - format of mode and subaddress byte

7 6 5 4 3 2 1 0

MODE2 MODE1 MODE0 SA4 SA3 SA2 SA1 SA0

Table 24. MSA - mode and subaddress byte bit description

Bit Symbol Description

7 to 5 MODE[2:0] mode tuning action; see Table 25

4 to 0 SA[4:0] Subaddress; 0 0000 to 1 1111 = write data byte subaddress 00h to 1Fh.

The subaddress value is auto-incremented and will revert from

SA = 1Fh to SA = 00h. The auto-increment function cannot be disabled.

Product data sheet Rev. 03 — 20 March 2008 28 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Since buffer mode (bits MODE[2:0] = 000) does not change any tuner action or register

other then those deﬁned by the I2C-bus write transmission it generally is the mode used

for writing outside the buffered subaddress range (i.e. bits SA[4:0] = 06h to 1Fh). Writing

in the subaddress range of 06h to 1Fh is executed immediately and is not controlled by

the state machine. Load mode does not interrupt a state machine process, the preload

action changes the content of the BUFFER register which may interfere with a tuner

action in progress.

When a new state machine tuning action is started during a mute state of the state

machine, the new action skips the unnecessary activation of mute and starts immediately

with the actions that follow the mute period in the standard sequence. In this way fastest

timing is possible e.g. for search tuning (see Figure 14,Figure 16,Figure 20 and

Figure 22). When AF update mode is started during a mute state only the return tuning

action will be performed; in combination with check mode an AF update can be created

with the AF sampling time deﬁned by I2C-bus control (see Figure 18).

The FM IF2 signal path contains a digital controlled AGC function with a maximum AGC

decay time of 13 ms to realize sufﬁcient AM suppression during changing signal

conditions and high modulation situations. During the settling of the AGC (e.g. after a

tuning action), the gain of the FM path and the level detection can be affected. To get

correct signal quality information, a minimum time of 13 ms should be used between two

tuning actions.

Table 25. Tuning action modes

MODE2 MODE1 MODE0 Symbol Description

0 0 0 buffer write BUFFER register, no state machine action, no

0 0 1 preset tune to new program with 60 ms mute control; swap;

see Figure 13 and Figure 14; BUFFER is preloaded with

CONTROL register; immediate swap; see Figure 11

0 1 0 search tune to new program and stay muted (to release use

end); swap; see Figure 15 and Figure 16; BUFFER is

preloaded with CONTROL register; see Figure 11

0 1 1 AF update tune to AF program; check AF quality and tune back to

main program; two register swap operations;

see Figure 10,Figure 17 and Figure 18

1 0 0 jump tune to AF program in minimum time; register swap;

see Figure 10,Figure 19 and Figure 20

1 0 1 check tune to AF program and stay muted (to release use end);

1 1 0 load write CONTROL register via BUFFER; no state machine

action; BUFFER is preloaded with CONTROL register;

immediate swap; see Figure 12

1 1 1 end end action; release mute; no register swap; see Figure 9

and Figure 23

Product data sheet Rev. 03 — 20 March 2008 29 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Fig 13. Preset mode

Fig 14. Preset mode, started during mute

001aab527

1 ms 1 msPLL 60 ms

tuning

tuning mute

WS processing

IF counter reset

quality detector reset

time

I2C-bus P

FAST

TAS read '00' '01' '10' '11' '11' '00'

f1 f2

001aab528

tuning

tuning mute

WS processing

IF counter reset

quality detector reset

time

I2C-bus

TAS read

PLL 60 ms

HOLD

FAST

'11' '10' '11' '11' '00'

f1 f2

FAST

1 ms

Product data sheet Rev. 03 — 20 March 2008 30 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Fig 15. Search mode

Fig 16. Search mode, started during mute

001aab529

tuning

tuning mute

WS processing

IF counter reset

quality detector reset

time

I2C-bus

TAS read

FAST

1 ms PLL

'00' '01' '10' '11' '11'

f1 f2

001aab530

tuning

tuning mute

WS processing

IF counter reset

quality detector reset

time

I2C-bus

TAS read

PLL

'11' '10' '11' '11'

f1 f2

HOLD

FAST FAST

Product data sheet Rev. 03 — 20 March 2008 31 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Fig 17. AF update mode

Fig 18. AF update mode, started during mute

001aab531

1 ms PLL 2 ms PLL 0.5 ms

counter and detector result HOLD until I2C-bus read

HOLD

'00' '01' '10'

'11'

'10' '00''00'

tuning

tuning mute

WS processing

IF counter reset

quality detector reset

IF counter hold

quality detector hold

time

I2C-bus

TAS read

f1 f2 f2 f1

1 ms

001aab532

PLL 0.5 ms

counter and detector result HOLD until I2C-bus read

HOLD

FAST

'10'

'11' '00' '00'

tuning

tuning mute

WS processing

IF counter reset

quality detector reset

IF counter hold

quality detector hold

time

I2C-bus

TAS read

f2 f1

1 ms

Product data sheet Rev. 03 — 20 March 2008 32 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Fig 19. Jump mode

Fig 20. Jump mode, started during mute

001aab533

1 ms PLL 0.5 ms

HOLD

'00' '01' '10' '00' '00'

'11'

tuning

tuning mute

WS processing

IF counter reset

quality detector reset

time

I2C-bus

TAS read

f1 f2

1 ms

001aab534

PLL 0.5 ms

HOLD

'11' '10' '00' '00'

'11'

tuning

tuning mute

WS processing

IF counter reset

quality detector reset

time

I2C-bus

TAS read

f1 f2

HOLD

FAST

1 ms

Product data sheet Rev. 03 — 20 March 2008 33 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Fig 21. Check mode

Fig 22. Check mode, started during mute

001aab535

HOLD

tuning

tuning mute

WS processing

IF counter reset

quality detector reset

time

I2C-bus

TAS read '00' '01' '10' '11' '11'

1 ms PLL

f1 f2

'11' '10' '11' '11'

001aab536

tuning

tuning mute

WS processing

IF counter reset

quality detector reset

time

I2C-bus

TAS read

PLL

f1 f2

HOLD

FAST

Product data sheet Rev. 03 — 20 March 2008 34 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.2 Write mode: data byte BANDWIDTH

Fig 23. End mode

'11' '00''00'

001aab537

tuning mute

WS processing

time

I2C-bus

TAS read

HOLD

FAST

1 ms

Table 26. BANDWIDTH - format of data byte 00h with default setting (buffered)

7 6 5 4 3 2 1 0

DYN BW4 BW3 BW2 BW1 BW0 TE1 TE0

11111110

Table 27. BANDWIDTH - data byte 00h bit description

Bit Symbol Description

7 DYN dynamic bandwidth; see Table 28

0 = FM IF bandwidth set by BW

1 = FM IF bandwidth dynamically controlled

6 to 2 BW[4:0] FM IF bandwidth; see Table 28

DYN = 0

00h to 1Fh = FM ﬁxed IF bandwidth 57 kHz to 165 kHz

DYN = 1

00h to 0Fh = minimum dynamic bandwidth 57 kHz to 109 kHz

10h to 1Fh = maximum dynamic bandwidth 113 kHz to 165 kHz

1 and 0 TE[1:0] threshold extension

00 = no threshold extension

01 = threshold extension low

10 = threshold extension standard

11 = threshold extension high

Product data sheet Rev. 03 — 20 March 2008 35 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Table 28. FM IF bandwidth selection

BW4 BW3 BW2 BW1 BW0 DYN = 0 DYN = 1

0000057kHz 57kHzto165kHz

0000160kHz 60kHzto165kHz

0001064kHz 64kHzto165kHz

0001167kHz 67kHzto165kHz

0010071kHz 71kHzto165kHz

0010174kHz 74kHzto165kHz

0011078kHz 78kHzto165kHz

0011181kHz 81kHzto165kHz

0100085kHz 85kHzto165kHz

0100188kHz 88kHzto165kHz

0101092kHz 92kHzto165kHz

0101195kHz 95kHzto165kHz

0110099kHz 99kHzto165kHz

0 1 1 0 1 102 kHz 102 kHz to 165 kHz

0 1 1 1 0 106 kHz 106 kHz to 165 kHz

0 1 1 1 1 109 kHz 109 kHz to 165 kHz

1 0 0 0 0 113 kHz 57 kHz to 113 kHz

1 0 0 0 1 116 kHz 57 kHz to 116 kHz

1 0 0 1 0 120 kHz 57 kHz to 120 kHz

1 0 0 1 1 123 kHz 57 kHz to 123 kHz

1 0 1 0 0 127 kHz 57 kHz to 127 kHz

1 0 1 0 1 130 kHz 57 kHz to 130 kHz

1 0 1 1 0 134 kHz 57 kHz to 134 kHz

1 0 1 1 1 137 kHz 57 kHz to 137 kHz

1 1 0 0 0 141 kHz 57 kHz to 141 kHz

1 1 0 0 1 144 kHz 57 kHz to 144 kHz

1 1 0 1 0 148 kHz 57 kHz to 148 kHz

1 1 0 1 1 151 kHz 57 kHz to 151 kHz

1 1 1 0 0 155 kHz 57 kHz to 155 kHz

1 1 1 0 1 158 kHz 57 kHz to 158 kHz

1 1 1 1 0 162 kHz 57 kHz to 162 kHz

1 1 1 1 1 165 kHz 57 kHz to 165 kHz

Product data sheet Rev. 03 — 20 March 2008 36 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.3 Write mode: data bytes PLLM and PLLL

8.2.4 Write mode: data byte DAA

Table 29. PLLM - format of data byte 01h with default setting (buffered)

7 6 5 4 3 2 1 0

RFGAIN PLL14 PLL13 PLL12 PLL11 PLL10 PLL9 PLL8

00001000

Table 30. PLLL - format of data byte 02h with default setting (buffered)

7 6 5 4 3 2 1 0

PLL7 PLL6 PLL5 PLL4 PLL3 PLL2 PLL1 PLL0

01111110

Table 31. PLLM and PLLL - data byte 01h and data byte 02h bit description

Bit Symbol Description

7 (PLLM) RFGAIN RF gain setting in FM mode

0 = standard RF gain

1 = +6 dB additional RF gain at FM mixer 1

6to0

(PLLM)

7to0

(PLLL)

PLL[14:0] VCO programmable divider N; application range of N = 1024 to 32767;

see Section 8.2.7

Table 32. DAA - format of data byte 03h with default setting (buffered)

7 6 5 4 3 2 1 0

0 DAA6 DAA5 DAA4 DAA3 DAA2 DAA1 DAA0

1000000

Table 33. DAA - data byte 03h bit description

Bit Symbol Description

7 - reserved; 0 = normal operation

6 to 0 DAA[6:0] RF selectivity alignment

FM: alignment of antenna circuit tuning voltage

(0.1 ×VVCO to 2.0 ×VVCO)

AM: voltage Digital-to-Analog Converter (DAC) output

(0.1 ×4.3 V to 2.0 ×4.3 V)

Product data sheet Rev. 03 — 20 March 2008 37 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.5 Write mode: data byte AGC

Table 34. AGC - format of data byte 04h with default setting (buffered)

7 6 5 4 3 2 1 0

AGCSW IFGAIN 0 0 AGC1 AGC0 KAGC LODX

00 0000

Table 35. AGC - data byte 04h bit description

Bit Symbol Description

7 AGCSW RF AGC switch

0 = no control of unused RF AGC

1 = unused AM RF AGC PIN diode at FM mode, or unused FM RF

AGC PIN diode at AM mode is supplied with a constant current for ﬁxed

attenuation

6 IFGAIN IF gain

0 = IF gain for low loss 10.7 MHz ﬁlter

1 = increased IF gain (3 dB) for high loss 10.7 MHz ﬁlter

5 and 4 - reserved; 0 = normal operation

3 and 2 AGC[1:0] setting of RF AGC threshold voltage

FM mixer 1 input voltage (RMS value)

00 = 24 mV

01 = 17 mV

10 = 12 mV

11 = 9 mV

AM mixer 1 input voltage (peak-to-peak value)

00 = 1000 mV

01 = 700 mV

10 = 500 mV

11 = 350 mV

1 KAGC keyed AGC

FM mode

0 = keyed AGC off

1 = keyed AGC on; the AGC start level is shifted to a value 10 dB above

the standard AGC start level, when the level voltage of the wanted RF

signal is below the threshold level voltage for narrow-band AGC

AM mode

0 = RF cascode AGC enabled with full range

1 = RF cascode AGC enabled with limited range

0 LODX FM mode: local switch

0 = standard operation (DX)

1 = forced FM RF AGC attenuation (LOCAL)

AM mode: trigger signal from AM IF noise blanker to AM audio noise

blanker

0 = trigger signal active for low modulation only (m < 0.05)

1 = trigger signal always active, independent of modulation

Product data sheet Rev. 03 — 20 March 2008 38 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.6 Write mode: data byte BAND

Different PLL charge pump currents are used for different reference frequencies to

maintain best PLL loop stability; see Table 40.

Settings FREF[2:0] = 000 (100 kHz) and FREF[2:0] = 001 (50 kHz) include additional high

current charge pump control to realize fast PLL locking within 1 ms.

Table 36. BAND - format of data byte 05h with default setting (buffered)

7 6 5 4 3 2 1 0

BAND2 BAND1 BAND0 FREF2 FREF1 FREF0 LOINJ 0

0010000

Table 37. BAND - data byte 05h bit description

Bit Symbol Description

7 to 5 BAND[2:0] FM and AM band selection; see Table 38

4 to 2 FREF[2:0] PLL reference frequency; see Table 39

1 LOINJ FM mixer 1 image suppression

0 = high injection image suppression

1 = low injection image suppression

0 - reserved; 0 = normal operation

Table 38. Decoding of BAND bits

BAND2 BAND1 BAND0 Divider ratio M Receiver band

000- reserved

0012FM

0103FM

0116AM

1008AM

10110AM

11016AM

11120AM

Table 39. Reference frequencies

FREF2 FREF1 FREF0 fref

0 0 0 100 kHz

0 0 1 50 kHz

0 1 0 25 kHz

0 1 1 20 kHz

1 0 0 10 kHz

1 0 1 reserved

1 1 0 reserved

1 1 1 reserved

Product data sheet Rev. 03 — 20 March 2008 39 of 108

NXP Semiconductors TEF6904A

Integrated car radio

[1] X = don’t care.

8.2.7 Tuning overview

High injection LO (Europe FM, US FM and AM):

with LOINJ = 0 to achieve full image suppression in FM.

Low injection LO (Japan FM and OIRT):

with LOINJ = 1 to achieve full image suppression in FM.

where: M is the divider ratio of the VCO frequency for AM mixer 1 and FM mixer 1

Table 40. Charge pump source[1]

FREF2 FREF1 FREF0 LOINJ Charge pump

current fref

0 0 0 X CP1 100 kHz

0 0 1 X CP2 50 kHz

0 1 0 X CP3 25 kHz

0 1 1 1 CP3 20 kHz

0 1 1 0 CP4 20 kHz

1 0 0 X CP5 10 kHz

1 0 1 X reserved

1 1 0 X reserved

1 1 1 X reserved

Table 41. Standard tuner settings

Broadcast band BAND[2:0] M FREF[2:0] fref LOINJ Tuning step

Europe FM and US FM 001 2 000 100 kHz 0 50 kHz

Japan FM 010 3 000 100 kHz 1 33.3 kHz

Eastern Europe FM

(OIRT FM) 010 3 011 20 kHz 1 6.67 kHz

AM MW and LW 111 20 011 20 kHz 0 1 kHz

AM SW 120 m to 60 m 110 16 100 10 kHz 0 0.625 kHz

AM SW 49 m to 22 m 101 10 100 10 kHz 0 1 kHz

AM SW 25 m to 15 m 100 8 100 10 kHz 0 1.25 kHz

AM SW 16 m to 11 m 011 6 100 10 kHz 0 1.67 kHz

NfRF 10.7 MHz+()M×

fref

-----------------------------------------------------

NfRF 10.7 MHz–()M×

fref

-----------------------------------------------------

tuning step fref

------

MfVCO

fmixer 1

---------------

Product data sheet Rev. 03 — 20 March 2008 40 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.8 Write mode: data byte LEVELALGN

For I2C-bus reading of the level voltage and standard alignment see read data byte 1

(see Table 10).

Level alignment should begin with slope alignment (LSL): the level slope does not change

with level start alignment (LST) or broadcast band; therefore a single LSL alignment

setting can be used for all FM and AM band selections.

Level start may change between broadcast bands; therefore generally a separate LST

alignment and setting is used for every broadcast band.

8.2.9 Write mode: data byte IFCF

Table 42. LEVELALGN - format of data byte 06h with default setting

7 6 5 4 3 2 1 0

LST4 LST3 LST2 LST1 LST0 LSL2 LSL1 LSL0

10000100

Table 43. LEVELALGN - data byte 06h bit description

Bit Symbol Description

7 to 3 LST[4:0] level start voltage alignment

2 to 0 LSL[2:0] level slope alignment

Table 44. IFCF - format of data byte 07h with default setting

7 6 5 4 3 2 1 0

IFCFA IFNBW IFCF5 IFCF4 IFCF3 IFCF2 IFCF1 IFCF0

00100000

Table 45. IFCF - data byte 07 bit description

Bit Symbol Description

7 IFCFA FM IF ﬁlter align mode

0 = normal operation

1 = align mode (fast frequency settling)

6 IFNBW FM IF ﬁlter narrow

0 = normal operation

1 = FM IF ﬁlter at minimum bandwidth (57 kHz)

5 to 0 IFCF[5:0] FM IF ﬁlter center frequency alignment

Product data sheet Rev. 03 — 20 March 2008 41 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.10 Write mode: data byte IFCAP

The fully integrated IF2 ﬁlter of the TEF6904A has to be aligned in order to achieve the

optimum performance at all ambient conditions.

8.2.10.1 Factory alignment of bits IFCAP[3:0]

FM IF ﬁlter operation point alignment: data byte IFCAP: a single alignment of the FM IF

ﬁlter operation range secures an accurate and continuous frequency setting over the full

temperature range and all FM bands.

1. Set bit IFCAPA to logic 1 to disable internal IFCAP control

2. Decrease IFCAP from 15 downwards until I2C-bus read bit IFCAPG (read byte 5; ID)

changes from logic 1 to logic 0

3. Save this IFCAP setting as alignment value

4. Set bit IFCAPA to logic 0 to return to normal operation

8.2.10.2 Initialization of the radio

During radio initialization bit IFCAPA (is logic 1) is used for writing the stored IFCAP[3:0]

value. Afterwards set bit IFCAPA to a logic 0 to start normal operation. Writing of the

IFCAP byte with the alignment value is allowed during radio operation but requires a

setting of bit IFCAPA to logic 0.

8.2.10.3 Factory alignment of IFCF

FM IF ﬁlter center frequency alignment: data byte IFCF: to correct IF frequency errors

caused by an error in the crystal frequency the alignment is preferably performed for every

FM band in use. A test frequency in the center of the band is preferred. An accurate

alignment result is realized by testing for symmetrical ﬁlter attenuation.

1. Set RF generator level VRF = 200 µV

2. Set bit IFCFA to logic 1 to enable fast settling of the ﬁlter frequency

3. Set bit IFNBW to logic 1 for accuracy (ﬁlter is set to narrow 57 kHz bandwidth)

4. Test high side of ﬁlter curve: tune to fRF − 50 kHz (Europe/USA) or fRF + 33.3 kHz

(Japan/OIRT)

Table 46. IFCAP - format of data byte 08h with default setting

7 6 5 4 3 2 1 0

IFCAPA 0 0 0 IFCAP3 IFCAP2 IFCAP1 IFCAP0

01000

Table 47. IFCAP - data byte 08h bit description

Bit Symbol Description

7 IFCAPA FM IF ﬁlter capacitor align

0 = standard operation

1 = align mode and initialization mode (auto correct disabled)

6 to 4 - reserved; 0 = normal operation

3 to 0 IFCAP[3:0] IF ﬁlter capacitor. Setting of FM IF ﬁlter capacitor value by means of

bit IFCAPG of read data byte 5, ID; see Table 19 (For initialization set

IFCAPA = 1. For alignment set IFCAPA = 1 and check, when read bit

IFCAPG changes from logic 0 to logic 1).

Product data sheet Rev. 03 — 20 March 2008 42 of 108

NXP Semiconductors TEF6904A

Integrated car radio

5. Change IFCF from 0 to 63 and note the level read result (level voltages)

6. Test low side of ﬁlter curve: tune to fRF + 50 kHz (Europe/USA) or fRF − 33.3 kHz

(Japan/OIRT)

7. Change IFCF from 0 to 63 and note the level voltages

8. Find the IFCF value where both level curves cross (lowest difference) and save this

IFCF value

9. Set bits IFCFA and IFNBW to logic 0 to return to normal operation

The bits IFCFA and IFNBW are intended for factory alignment use only. Normal radio

operation requires a setting of bits IFCFA and IFNBW to logic 0.

8.2.11 Write mode: data byte ACD

Table 48. ACD - format of data byte 09h with default setting

7 6 5 4 3 2 1 0

ACDLEV ACDLAP1 ACDLAP0 ACDBAL1 ACDBAL0 ACDWAM1 ACDWAM0 HCSFH

01 0 0 1 0 1 0

Table 49. ACD - data byte 09h bit description

Bit Symbol Description

7 ACDLEV level threshold; start level of threshold extension and latch protection

0 = start at LEV = 40 (VLEVEL = 0.88 V), normal operation

1 = start at LEV = 48 (VLEVEL =1V)

6 and 5 ACDLAP[1:0] latch protection limit; protect against narrow bandwidth locking at high

modulation, low RF signal condition

00 = no protection

01 = low protection

10 = standard protection

11 = high protection

4 and 3 ACDBAL[1:0] control balance; bandwidth control priority towards adjacent channel

(prevent breakthrough) or towards modulation (low distortion)

00 = high adjacent channel priority

01 = medium adjacent channel priority, standard operation

10 = medium modulation priority

11 = high modulation priority

2 and 1 ACDWAM[1:0] WAM threshold; desensitize bandwidth control at detection of WAM

00 = no desensitization on WAM

01 = low sensitivity; 40 %

10 = medium sensitivity; 30 %

11 = high sensitivity; 20 %

0 HCSFH HCC minimum bandwidth; combined control with bit HCSF;

see Table 57,Table 60 and Figure 26

0 = minimum bandwidth of high cut control is 2.2 kHz or 3.3 kHz

1 = minimum bandwidth of high cut control is 3.9 kHz or 5.6 kHz

Product data sheet Rev. 03 — 20 March 2008 43 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.12 Write mode: data byte SENSE

The input control value for weak signal control derived from USN is denoted by Veq.LEVEL;

equivalent level voltage. This indicates a weak signal control amount equal to the weak

signal control generated by a certain VLEVEL voltage.

The USS setting does not inﬂuence the I2C-bus read quality information of USN; read

data byte 2, USN/WAM; see Table 12.

The input control value for weak signal control derived from WAM is denoted by Veq.LEVEL;

equivalent level voltage. This indicates a weak signal control amount equal to the weak

signal control generated by a certain VLEVEL voltage.

The WAS setting does not inﬂuence the I2C-bus read quality information of WAM; read

data byte 2, USN/WAM; see Table 12.

Table 50. SENSE - format of data byte 0Ah with default setting

7 6 5 4 3 2 1 0

CSA3 CSA2 CSA1 CSA0 USS1 USS0 WAS1 WAS0

10000101

Table 51. SENSE - data byte 0Ah bit description

Bit Symbol Description

7 to 4 CSA[3:0] alignment of FM stereo channel separation

3 and 2 USS[1:0] USN sensitivity; USN weak signal control equivalent level

voltage/frequency deviation for weak signal processing; see Figure 24

00 = −0.06 V/kHz

01 = −0.08 V/kHz

10 = −0.12 V/kHz

11 = −0.16 V/kHz

1 and 0 WAS[1:0] WAM sensitivity; WAM weak signal control equivalent level

voltage/VLEVEL (peak-to-peak) for weak signal processing; see Figure 24

00 = −7.5

01 = −10

10 = −15

11 = −20

Product data sheet Rev. 03 — 20 March 2008 44 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.13 Write mode: data byte TIMING

[1] During the tuning mute of the preset and search mode tuning action the time constants set by STC, HTC and MTC change to

tattack = 50 ms and trecovery = 50 ms to enable fast settling of the weak signal processing to new conditions.

a. MPX signal. b. Level variation.

Fig 24. Weak signal control sensitivity versus MPX signal at 150 kHz (USN) and level variation at 21 kHz (WAM)

001aab831

∆f (kHz)

I2C-bus:

USN = 15

755025

Veq. LEVEL

(V)

11 10 01 00

USS[1:0]

001aab538

VLEVEL (V)

0 0.60.40.2

Veq. LEVEL

(V)

11 10 01 00

WAS[1:0]

I2C-bus: 15

0WAM =

Table 52. TIMING - format of data byte 0Bh with default setting

7 6 5 4 3 2 1 0

STC1 STC0 HTC2 HTC1 HTC0 MTC2 MTC1 MTC0

10100110

Table 53. TIMING - data byte 0Bh bit description[1]

Bit Symbol Description

7 and 6 STC[1:0] setting of the stereo noise control time constants; see Table 54

5 to 3 HTC[2:0] setting of the high cut control time constants; see Table 55

2 to 0 MTC[2:0] setting of the soft mute control time constants; see Table 56

Table 54. SNC weak signal processing control speed setting

STC1 STC0 tattack trecovery

0 0 0.1 s 1.25 s

0 1 0.1 s 2.5 s

1 0 0.1 s 5 s

1 1 0.1 s 10 s

Product data sheet Rev. 03 — 20 March 2008 45 of 108

NXP Semiconductors TEF6904A

Integrated car radio

[1] When for an external audio source VU-meter mode is enabled (bits AVUM or COMP are logic 1) the HTC

setting controls the trecovery VU-meter timing, tattack has a ﬁxed value of 20 ms; see Table 100.

[1] When for an external audio source dynamic compression is enabled (bit COMP is logic 1) the MTC setting

controls the trecovery compression timing, tattack has a ﬁxed value of 20 ms; see Table 80.

[2] The attack time is the time, which the weak signal processing needs to realize a full control change for a

level voltage change between HIGH level (where the weak signal processing is inactive) and 0.75 V level

voltage.

[3] The recovery time is the time needed for the full control change when the level voltage rises from 0.75 V to

HIGH level.

Table 55. HCC speed setting[1]

HTC2 HTC1 HTC0 tattack trecovery

0 0 0 0.03 s 0.04 s

0 0 1 0.03 s 0.08 s

0 1 0 0.06 s 0.3 s

0 1 1 0.25 s 0.3 s

1 0 0 0.25 s 0.6 s

1 0 1 0.5 s 0.6 s

1101 s1.25 s

1111 s2.5 s

Table 56. Soft mute weak signal processing control speed setting[1]

MTC2 MTC1 MTC0 tattack[2] trecovery[3]

0 0 0 0.01 s 0.01 s

0 0 1 0.01 s 0.03 s

0 1 0 0.03 s 0.1 s

0 1 1 0.1 s 0.1 s

1 0 0 0.1 s 0.2 s

1 0 1 0.2 s 0.2 s

1 1 0 0.4 s 0.4 s

1 1 1 0.4 s 0.8 s

Product data sheet Rev. 03 — 20 March 2008 46 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.14 Write mode: data byte SNC

Table 57. SNC - format of data byte 0Ch with default setting

7 6 5 4 3 2 1 0

SST3 SST2 SST1 SST0 SSL1 SSL0 HCMP HCSF

01110100

Table 58. SNC - data byte 0Ch bit description

Bit Symbol Description

7 to 4 SST[3:0] SNC start; start setting of the stereo noise control; see Table 59 and

Figure 25

3 and 2 SSL[1:0] SNC slope; slope setting of the stereo noise control (αsep /V

eq.LEVEL);

see Figure 25

00 = 38 dB/V

01 = 51 dB/V

10 = 63 dB/V

11 = 72 dB/V

1 HCMP HCC control source

0 = high cut control is only controlled by the level information

1 = high cut control is controlled by level, USN and WAM

0 HCSF HCC minimum bandwidth; combined control with bit HCSFH;

see Table 49,Table 60 and Figure 26

Table 59. Start of stereo noise control weak signal processing

SST3 SST2 SST1 SST0 Stereo noise control start (Veq.LEVEL)

0 0 0 0 1.88 V

0 0 0 1 1.94 V

0 0 1 0 2.00 V

0 0 1 1 2.06 V

0 1 0 0 2.13 V

0 1 0 1 2.19 V

0 1 1 0 2.25 V

0 1 1 1 2.31 V

1 0 0 0 2.38 V

1 0 0 1 2.44 V

1 0 1 0 2.5 V

1 0 1 1 2.56 V

1 1 0 0 2.63 V

1 1 0 1 2.69 V

1 1 1 0 2.75 V

1 1 1 1 2.81 V

Product data sheet Rev. 03 — 20 March 2008 47 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.15 Write mode: data byte HIGHCUT

Table 60. HCC minimum bandwidth

HCSFH HCSF High cut control minimum bandwidth

0 0 2.2 kHz

0 1 3.3 kHz

1 0 3.9 kHz

1 1 5.6 kHz

SSL = 63 dB/V. SST = 2.5 V.

a. Start. b. Slope.

Fig 25. SNC start and slope settings versus equivalent level voltage; SNC detector (level, USN and WAM), USN

detector and WAM detector

Veq. LEVEL (V)

0.5 32.51.5 21

001aab493

αcs

(dB)

0000 0111 1000 1111

SST[3:0]

Veq. LEVEL (V)

0.5 32.51.5 21

001aab539

αcs

(dB)

00 01 10

SSL[1:0]

Table 61. HIGHCUT - format of data byte 0Dh with default setting

7 6 5 4 3 2 1 0

HST2 HST1 HST0 HSL1 HSL0 HCF2 HCF1 HCF0

01101111

Table 62. HIGHCUT - data byte 0Dh bit description

Bit Symbol Description

7 to 5 HST[2:0] HCC start; start setting of the high cut control; see Table 63 and Figure 26

4 and 3 HSL[1:0] HCC slope; slope setting of the high cut control (α10 kHz /V

eq.LEVEL); see Figure 26

00 = 9 dB/V

01 = 11 dB/V

10 = 14 dB/V

11 = 18 dB/V

2 to 0 HCF[2:0] HCC maximum bandwidth; setting of the ﬁxed high cut control; see Table 64,Figure 26 and

Figure 27

Product data sheet Rev. 03 — 20 March 2008 48 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Table 63. Start of high cut control weak signal processing

HST2 HST1 HST0 High cut control start (Veq.LEVEL)

0 0 0 1.5 V

0 0 1 1.75 V

0 1 0 2.0 V

0 1 1 2.25 V

1 0 0 2.5 V

1 0 1 3.0 V

1 1 0 3.5 V

1 1 1 4.0 V

Table 64. Fixed high cut settings

HCF2 HCF1 HCF0 Fixed high cut; HCC Bmax

0 0 0 reserved

0 0 1 2 kHz

0 1 0 3 kHz

0 1 1 5 kHz

1 0 0 7 kHz

1 0 1 10 kHz

1 1 0 wide bandwidth

1 1 1 full bandwidth

Product data sheet Rev. 03 — 20 March 2008 49 of 108

NXP Semiconductors TEF6904A

Integrated car radio

HCF = 111, HCSF = 0, HCSFH = 0, HSL = 10. HST = 100.

(1) HCSFH = 1; HCSF = 1; Bmin = 5.6 kHz.

(2) HCSFH = 1; HCSF = 0; Bmin = 3.9 kHz.

(3) HCSFH = 0; HCSF = 1; Bmin = 3.3 kHz.

(4) HCSFH = 0; HCSF = 0; Bmin = 2.2 kHz.

a. Start. b. Slope and minimum bandwidth.

Fig 26. High cut control start and slope settings versus equivalent level voltage; HCC detector (HCMP = 0 for level

or HCMP = 1 for level, WAM and USN)

001aab597

Veq.LEVEL (V)

0.5 3.52.51.5

α10 kHz

(dB)

111110101100

000

001

010

011

HST[2:0]

Veq.LEVEL (V)

0.5 2.51.5

001aad655

α10 kHz

(dB)

(4)

(3)

(2)

10 11 3

wide bandwidth

full bandwidth

(kHz)

(1)

HSL[1:0] 01

Fig 27. Fixed high cut setting characteristics

001aab542

−8

−16

gain

(dB)

−24

f (kHz)

10−2102

1010−11

111

110

101

100

011

010

001

HCF[2:0]

Product data sheet Rev. 03 — 20 March 2008 50 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.16 Write mode: data byte SOFTMUTE

[1] When for an external audio source dynamic compression is enabled (bit COMP is logic 1) the MSL setting

controls the compression ratio. For default 2 : 1 compression MSL = 01 is used; see Table 82.

[1] When for an external audio source dynamic compression is enabled (COMP = 1) the MST setting controls

the compression range. For default full compression MST = 7 is used; see Table 81.

Table 65. SOFTMUTE - format of data byte 0Eh with default setting

7 6 5 4 3 2 1 0

MST2 MST1 MST0 MSL1 MSL0 UMD1 UMD0 MSLE

01101010

Table 66. SOFTMUTE - data byte 0Eh bit description

Bit Symbol Description

7 to 5 MST[2:0] soft mute start; start setting of the soft mute; for FM see Table 67 and

Figure 28; for AM see Table 68 and Figure 29

4 and 3 MSL[1:0] soft mute slope[1]; slope setting of the soft mute (α10 kHz /V

eq.LEVEL); for

FM see Table 69 and Figure 28; for AM see Table 70 and Figure 29

2 and 1 UMD[1:0] USN soft mute depth; setting of the maximum attenuation of the USN fast

soft mute control; see Figure 30

00 = 3 dB

01 = 6 dB

10 = 9 dB

11 = 12 dB

0 MSLE soft mute slope extension; additional slope setting of the soft mute; for

FM see Table 69 and Figure 28; for AM see Table 70 and Figure 29

Table 67. Start of soft mute control weak signal processing; FM mode[1]

MST2 MST1 MST0 Soft mute control start (Veq.LEVEL)

0 0 0 0.88 V

0 0 1 1.0 V

0 1 0 1.12 V

0 1 1 1.25 V

1 0 0 1.38 V

1 0 1 0.75 V

1 1 0 0.81 V

1 1 1 0.94 V

Product data sheet Rev. 03 — 20 March 2008 51 of 108

NXP Semiconductors TEF6904A

Integrated car radio

[1] When for an external audio source dynamic compression is enabled (COMP = 1) the MST setting controls

the compression range. For default full compression MST = 7 is used; see Table 81.

[1] When for an external audio source dynamic compression is enabled (COMP = 1) the MSL setting controls

the compression range. For default 2 : 1 compression MSL = 1 is used; see Table 82.

[1] When for an external audio source dynamic compression is enabled (COMP = 1) the MSL setting controls

the compression range. For default 2 : 1 compression MSL = 1 is used; see Table 82.

Table 68. Start of soft mute control weak signal processing; AM mode[1]

MST2 MST1 MST0 Soft mute control start (Veq.LEVEL)

0 0 0 1.5 V

0 0 1 1.75 V

0 1 0 2.0 V

0 1 1 1.25 V

1 0 0 1.38 V

1 0 1 1.62 V

1 1 0 1.88 V

1 1 1 2.12 V

Table 69. Slope of soft mute control weak signal processing; FM mode[1]

MSLE MSL1 MSL0 Soft mute control slope (αAF /V

eq.LEVEL)

0 0 0 8 dB/V

0 0 1 16 dB/V

0 1 0 24 dB/V

0 1 1 32 dB/V

1 0 0 40 dB/V

1 0 1 48 dB/V

1 1 0 reserved

1 1 1 reserved

Table 70. Slope of soft mute control weak signal processing; AM mode[1]

MSL1 MSL0 MSLE Soft mute control slope (αAF /V

eq.LEVEL)

0 0 0 8 dB/V

0 0 1 12 dB/V

0 1 0 16 dB/V

0 1 1 20 dB/V

1 0 0 24 dB/V

1 0 1 28 dB/V

1 1 0 32 dB/V

1 1 1 36 dB/V

Product data sheet Rev. 03 — 20 March 2008 52 of 108

NXP Semiconductors TEF6904A

Integrated car radio

MSL[1:0] = 11. MST[2:0] = 000.

(0) MSLE = 0; MSL[1:0] = 00.

(1) MSLE = 0; MSL[1:0] = 01.

(2) MSLE = 0; MSL[1:0] = 10.

(3) MSLE = 0; MSL[1:0] = 11.

(0E) MSLE = 1; MSL[1:0] = 00.

(1E) MSLE = 1; MSL[1:0] = 01.

a. Start. b. Slope.

Fig 28. Soft mute start and slope settings versus equivalent level voltage (FM mode)

Veq.LEVEL (V)

0.5 2.52.01.0 1.5

001aad656

αmute

(dB)

MST[2:0]

101

110

000

111

001

010

011

100

Veq.LEVEL (V)

0.5 1.51.250.75 1.0

001aad658

αmute

(dB)

(0)

(1)

(2)

(3)

(0E)

(1E)

Product data sheet Rev. 03 — 20 March 2008 53 of 108

NXP Semiconductors TEF6904A

Integrated car radio

MSL[1:0] = 11. MST[2:0] = 011.

(0) MSL[1:0] = 00; MSLE = 0.

(0E) MSL[1:0] = 00; MSLE = 1.

(1) MSL[1:0] = 01; MSLE = 0.

(1E) MSL[1:0] = 01; MSLE = 1.

(2) MSL[1:0] = 10; MSLE = 0.

(2E) MSL[1:0] = 10; MSLE = 1.

(3) MSL[1:0] = 11; MSLE = 0.

(3E) MSL[1:0] = 11; MSLE = 1.

a. Start. b. Slope.

Fig 29. Soft mute start and slope settings versus equivalent level voltage (AM mode)

Veq.LEVEL (V)

0.5 2.52.01.0 1.5

001aad657

αmute

(dB)

MST[2:0]

011

100

000

101

001

110

010

111

Veq.LEVEL (V)

0.5 1.51.250.75 1.0

001aad659

αmute

(dB)

(0)

(0E)

(1)

(1E)

(2)

(3)

(2E)

(3E)

MST[2:0] = 011, MSL[1:0] = 10.

Fig 30. USN soft mute depth settings; USN detector

Veq.LEVEL (V)

0.5 1.51.250.75 1

001aab544

αmute

(dB)

UMD[1:0]

Product data sheet Rev. 03 — 20 March 2008 54 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.17 Write mode: data byte RADIO

Table 71. RADIO - format of data byte 0Fh with default setting

7 6 5 4 3 2 1 0

0 MONO DEMP 1 NBS1 NBS0 NBL1 NBL0

00 1010

Table 72. RADIO - data byte 0Fh bit description

Bit Symbol Description

7 - reserved; 0 = normal operation

6 MONO FM forced mono; stereo decoder disable option

0 = stereo decoder is set to FM stereo

1 = stereo decoder is set to FM mono

5 DEMP de-emphasis; selection of the de-emphasis time constant; see Figure 31

0 = de-emphasis is 75 µs

1 = de-emphasis is 50 µs

4 - reserved; 1 = normal operation

3 and 2 NBS[1:0] noise blanker audio sensitivity

FM audio noise blanker sensitivity setting of FM MPX ignition noise

detector (peak value of noise pulse at MPX signal)

00 = 65 mV (high sensitivity)

01 = 100 mV

10 = 125 mV

11 = 160 mV (low sensitivity)

AM audio noise blanker sensitivity setting of audio ignition noise detector

(trigger slew rate of MPX signal)

00 = 16.5 V/ms (high sensitivity)

01 = 18.6 V/ms

10 = 21 V/ms

11 = 23.5 V/ms (low sensitivity)

1 and 0 NBL[1:0] noise blanker IF or level sensitivity

FM audio noise blanker sensitivity setting of FM level ignition noise

detector (peak value of noise pulse at level voltage)

00 = 10 mV (high sensitivity)

01 = 25 mV

10 = 36 mV

11 = 50 mV (low sensitivity)

AM IF noise blanker sensitivity setting of IF ignition noise detector (peak

voltage of noise pulse at RF dummy aerial input)

00 = 1.4 V (low sensitivity)

01 = 1.0 V

10 = 0.7 V (high sensitivity)

11 = AM IF noise blanker disabled

Product data sheet Rev. 03 — 20 March 2008 55 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.18 Write mode: data byte INPUT

Fig 31. De-emphasis setting characteristics

001aab545

−8

−16

gain

(dB)

−24

f (kHz)

10−2102

1010−11

DEMP

Table 73. INPUT - format of data byte 10h with default setting

7 6 5 4 3 2 1 0

INP3 INP2 INP1 INP0 ING3 ING2 ING1 ING0

00001010

Table 74. INPUT - data byte 10h bit description

Bit Symbol Description

7 to 4 INP[3:0] input selection; selection of the audio source for the tone/volume part;

see Table 75

3 to 0 ING[3:0] Input gain; −10 dB to +18 dB input gain. The ING input gain setting is

added to the VOL volume setting to deﬁne the actual volume control;

see Table 76.

Product data sheet Rev. 03 — 20 March 2008 56 of 108

NXP Semiconductors TEF6904A

Integrated car radio

[1] The input gain setting ING and the volume setting VOL deﬁne the overall volume. The overall range is

limited to −83 dB to +26 dB. For overall values > +28 dB the actual gain is +28 dB. For overall values

<−83 dB the circuit is muted.

Table 75. Input select

INP3 INP2 INP1 INP0 Audio source for tone/volume processing

0000radio

0001stereo with Common Mode Rejection (CMR) (pins INAL,

INAR and INAC)

0010stereo (pins INBL and INBR)

0011mono symmetrical or mono with CMR (pins INC and IND)

0100stereo (pins INC and IND)

0101mono (pin INC)

0110mono (pin IND)

0111stereo with CMR (pins INBL, INBR and INC)

1000stereo symmetrical (pins INBL, INBR, INC and IND)

1001stereo (pins INAL and INAR)

1010mono (pin INAC)

1011stereo symmetrical (pins INAL, INAR, INAC and INAD)

1100stereo (pins INAC and INAD)

1101stereo with CMR (pins INBL, INBR and INAD)

1110mono (pin INAD)

1111reserved

Table 76. Input gain setting

ING3 ING2 ING1 ING0 Input gain control

1011−10 dB[1]

1100−8 dB

1101−6 dB

1110−4 dB

1111−2 dB

00000 dB

00012 dB

00104 dB

00116 dB

01008 dB

010110 dB

[1]

011012 dB

[1]

011114 dB

[1]

100016 dB

[1]

100118 dB

[1]

1010mute

Product data sheet Rev. 03 — 20 March 2008 57 of 108

NXP Semiconductors TEF6904A

Integrated car radio

[1] M−, L− and R− indicate inverted polarity of audio signal.

8.2.19 Write mode: data byte VOLUME

[1] Dynamic compression can be used with external sources only. When dynamic compression is active, the radio quality detection of USN,

MOD and offset is limited to AF update tuning only. For dynamic compression the bits MOD[4:0] indicate the external source input

amplitude as in the VU-meter mode; AVUM; data byte 17h (see Table 98). The FM dynamic bandwidth control is disabled and a ﬁxed

bandwidth of 113 kHz is deﬁned. However, other ﬁxed bandwidth settings are available by DYN = 0 and the setting of BW; data byte 0h

(see Table 28). The compression recovery timing is controlled by data byte 0Bh; TIMING (see Table 80). Compression start and slope

are controlled by data byte 0Eh; SOFTMUTE (see Table 81 and Table 82). Standard compression requires a setting of MST = 7 and

MSL = 1.

Table 77. Input select pin use and suggested combinations of input sources[1]

INP[3:0] Input pin use Audio

source Source combinations

INAL INAR INAC INAD INBL INBR INC IND

0000 radio xxxxxxxxxxxxxxxx

0001 L R GND stereo CMR xxxxxx

0010 L R stereo x x x x x x xxxxx

0011 M−M+ mono

symmetrical xxxxx

0100 L−R−stereo x x x x

0101 M−mono x x x x

0110 M mono x x x x x x

0111 L R GND stereo CMR x x

1000 L+ R+ L−R−stereo

symmetrical x

1001 L R stereo xxxxx

1010 M−mono x x

1011 L+ R+ L−R−mono

symmetrical xxxxx

1100 L−R−stereo x x x

1101 GND L R stereo CMR x x

1110 M−mono xxxx xx

Table 78. VOLUME - format of data byte 11h with default setting

7 6 5 4 3 2 1 0

COMP VOL6 VOL5 VOL4 VOL3 VOL2 VOL1 VOL0

00110000

Table 79. VOLUME - data byte 11h bit description

Bit Symbol Description

7 COMP dynamic compression[1]; see Figure 34

0 = compression is disabled (standard use)

1 = dynamic compression is enabled

6 to 0 VOL[6:0] volume setting (see Table 83); for balance control see data byte 16h (see Table 95), for

loudness control see data byte 17h (see Table 98)

Product data sheet Rev. 03 — 20 March 2008 58 of 108

NXP Semiconductors TEF6904A

Integrated car radio

[1] Setting MTC is also in use for setting the timing of weak signal soft mute control during radio operation.

[1] Setting MST is also in use for setting the start of weak signal soft mute control during radio operation.

[1] Setting MSL is also in use for setting the slope of weak signal soft mute control during radio operation.

Table 80. Dynamic compression timing; MTC[2:0] of data byte 0Bh; TIMING[1]

MTC2 MTC1 MTC0 tattack trecovery

0 0 0 0.02 s 0.03 s

0 0 1 0.02 s 0.06 s

0 1 0 0.02 s 0.2 s

0 1 1 0.02 s 5 s

1 0 0 0.02 s 0.6 s

1 0 1 0.02 s 10 s

1 1 0 0.02 s 1 s

1 1 1 0.02 s 2 s

Table 81. Dynamic compression start; MST[2:0] of data byte 0Eh; SOFTMUTE[1]

MST2 MST1 MST0 Compression range

0 0 0 reserved

0 0 1 reserved

0 1 0 reserved

0 1 1 start = 4 dBV; 2:1range = 2 dB

1 0 0 start = −4 dBV; 2:1range=6dB

1 0 1 start = −12 dBV; 2:1range = 10 dB

1 1 0 start = −20 dBV; 2:1range = 14 dB

1 1 1 start = −34 dBV; full range (2:1=18dB)

Table 82. Dynamic compression slope; MSL[1:0] of data byte 0Eh; SOFTMUTE[1]

MSL1 MSL0 Compression ratio

0 0 4 : 3; full range = 9 dB

0 1 standard compression (2 : 1); full range = 18 dB

1 0 4 : 1; full range = 27 dB

1 1 limiting; full range = 36 dB

Product data sheet Rev. 03 — 20 March 2008 59 of 108

NXP Semiconductors TEF6904A

Integrated car radio

1 V = 0 dBV, (MST, MSL) control.

Fig 32. Dynamic compression volume control; non-standard characteristics

1 V = 0 dBV, MST = 7 (MST[2:0] = 111), MSL = 1 (MSL[1:0] = 01).

Fig 33. Dynamic compression volume control; typical setting

−10

−20

−60 −50 −40 −30 −20 −10 0 6

001aac443

∆ volume

(dB)

(7, 0)

(7, 1)

(7, 2)

(7, 3)

(3, 0)

(3, 1)

(3, 2)

(3, 3)

(6, 1) (5, 1) (4, 1)

line input (dBV)

−10

−20

−60 −50 −40 −30 −20 −10 0 6

001aab835

24 dB

40 dB

> 1 : 1

2 : 1

∆ volume

(dB)

line input (dBV)

Product data sheet Rev. 03 — 20 March 2008 60 of 108

NXP Semiconductors TEF6904A

Integrated car radio

1V=0dBV.

Dynamic compression is realized by attenuation of the volume setting. To match the audio

amplitudes with and without compression a higher volume (VOL) setting should be selected

when compression is activated. The VOL correction value used deﬁnes the positioning of the

compression characteristic high signal attenuation and low signal ampliﬁcation.

In this example: COMP = 0: VOL = ‘user volume’; COMP = 1: VOL = ‘user volume’ + 15.

Fig 34. Example of input to output compression

Table 83. Volume setting

VOL6 VOL5 VOL4 VOL3 VOL2 VOL1 VOL0 Volume (dB)

000000028

[1]

000000127

[1]

000001026

[1]

000001125

[1]

000010024

[1]

000010123

[1]

000011022

[1]

000011121

[1]

000100020

[1]

000100119

[1]

000101018

[1]

000101117

[1]

000110016

[1]

000110115

[1]

000111014

[1]

000111113

[1]

001000012

[1]

001000111

[1]

001001010

00100119

line input (dBV)

−60 200 +6−40 −20

001aab549

−40

−60

−20

line output

(dBV)

−80

15 dB

COMP = 1;

VOL = −5 dB

COMP = 0;

VOL = −20 dB

Product data sheet Rev. 03 — 20 March 2008 61 of 108

NXP Semiconductors TEF6904A

Integrated car radio

00101008

00101017

00101106

00101115

00110004

00110013

00110102

00110111

00111000

0011101−1

0011110−2

0011111−3

0100000−4

0100001−5

0100010−6

0100011−7

0100100−8

0100101−9

0100110−10

0100111−11

0101000−12

0101001−13

0101010−14

0101011−15

0101100−16

0101101−17

0101110−18

0101111−19

0110000−20

0110001−21

0110010−22

0110011−23

0110100−24

0110101−25

0110110−26

0110111−27

0111000−28

0111001−29

0111010−30

0111011−31

0111100−32

Table 83. Volume setting

…continued

VOL6 VOL5 VOL4 VOL3 VOL2 VOL1 VOL0 Volume (dB)

Product data sheet Rev. 03 — 20 March 2008 62 of 108

NXP Semiconductors TEF6904A

Integrated car radio

0111101−33

0111110−34

0111111−35

1000000−36

1000001−37

1000010−38

1000011−39

1000100−40

1000101−41

1000110−42

1000111−43

1001000−44

1001001−45

1001010−46

1001011−47

1001100−48

1001101−49

1001110−50

1001111−51

1010000−52

1010001−53

1010010−54

1010011−55

1010100−56

1010101−57[2]

1010110−58[2]

1010111−59[2]

1011000−60[2]

1011001−61[2]

1011010−62[2]

1011011−63[2]

1011100−64[2]

1011101−65[2]

1011110−66[2]

1011111−67[2]

1100000−68[2]

1100001−69[2]

1100010−70[2]

1100011−71[2]

1100100−72[2]

1100101−73[2]

Table 83. Volume setting

…continued

VOL6 VOL5 VOL4 VOL3 VOL2 VOL1 VOL0 Volume (dB)

Product data sheet Rev. 03 — 20 March 2008 63 of 108

NXP Semiconductors TEF6904A

Integrated car radio

[1] The overall gain is the sum of the input gain setting ING[3:0] and the volume setting VOL[6:0].

The overall gain has a range of +28 dB to −83 dB.

For ING + VOL > 28 dB the overall gain is 28 dB.

For ING + VOL < −83 dB the mute is active.

[2] For overall gain values below −75 dB (ING + VOL < −75 dB) the gain steps have a monotonous sequence.

The values of gain set error, gain step error and gain tracking error are not speciﬁed. The minimum gain

value is determined by the mute value.

1100110−74[1][2]

1100111−75[1][2]

1101000−76[1][2]

1101001−77[1][2]

1101010−78[1][2]

1101011−79[1][2]

1101100−80[1][2]

1101101−81[1][2]

1101110−82[1][2]

1101111−83[1][2]

1110000−84[1][2]

1110001−85[1][2]

1110010−86[1][2]

1110011−87[1][2]

1110100−88[1][2]

1110101−89[1][2]

1110110−90[1][2]

1110111−91[1][2]

1111000−92[1][2]

1111001−93[1][2]

1111010−94[1][2]

1111011−95[1][2]

1111100−96[1][2]

1111101−97[1][2]

1111110−98[1][2]

1111111mute

Table 83. Volume setting

…continued

VOL6 VOL5 VOL4 VOL3 VOL2 VOL1 VOL0 Volume (dB)

Product data sheet Rev. 03 — 20 March 2008 64 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.20 Write mode: data byte TREBLE

Table 84. TREBLE - format of data byte 12h with default setting

7 6 5 4 3 2 1 0

0 TRE2 TRE1 TRE0 TREM TRF1 TRF0 0

000110

Table 85. TREBLE - data byte 12h bit description

Bit Symbol Description

7 - reserved; 0 = normal operation

6 to 4 TRE[2:0] treble setting; treble ampliﬁcation or gain setting; see Table 86 and

Figure 35

3 TREM treble control mode; treble control of attenuation or gain; see Table 86

0 = treble mode is set to attenuation

1 = treble mode is set to gain

2 and 1 TRF[1:0] treble frequency

00 = 8 kHz

01 = 10 kHz

10 = 12 kHz

11 = 15 kHz

0 - reserved; 0 = normal operation

Table 86. Treble control setting

TRE2 TRE1 TRE0 Treble control

TREM = 0

0000 dB

001−2 dB

010−4 dB

011−6 dB

100−8 dB

101−10 dB

110−12 dB

111−14 dB

TREM = 1

0000 dB

0012 dB

0104 dB

0116 dB

1008 dB

1 0 1 10 dB

1 1 0 12 dB

1 1 1 14 dB

Product data sheet Rev. 03 — 20 March 2008 65 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.21 Write mode: data byte BASS

Fig 35. Treble amplitude control characteristics; treble frequency (TRF) = 10 kHz

001aab550

−8

gain

(dB)

−16

faudio (kHz)

10−21010−11

Table 87. BASS - format of data byte 13h with default setting

7 6 5 4 3 2 1 0

BAS3 BAS2 BAS1 BAS0 BASM BAF1 BAF0 0

0000110

Table 88. BASS - data byte 13h bit description

Bit Symbol Description

7 to 4 BAS[3:0] bass setting; bass ampliﬁcation or gain setting; see Table 89 and Figure 36

3 BASM bass control mode; bass control of attenuation or gain; see Table 89

0 = bass mode is set to attenuation

1 = bass mode is set to gain

2 and 1 BAF[1:0] bass frequency

00 = 60 Hz

01 = 80 Hz

10 = 100 Hz

11 = 120 Hz

0 - reserved; 0 = normal operation

Product data sheet Rev. 03 — 20 March 2008 66 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Table 89. Bass control setting

BAS3 BAS2 BAS1 BAS0 Bass control

BASM = 0

00000 dB

0001−2 dB

0010−4 dB

0011−6 dB

0100−8 dB

0101−10 dB

0110−12 dB

0111−14 dB

1000−16 dB

1001−18 dB

1010−20 dB

BASM = 1

00000 dB

00012 dB

00104 dB

00116 dB

01008 dB

010110 dB

011012 dB

011114 dB

100016 dB

100118 dB

101020 dB

Fig 36. Bass amplitude control characteristics; bass frequency (BAF) = 60 Hz

001aab551

−8

Gbass

(dB)

−16

faudio (kHz) 102

1010−11

Product data sheet Rev. 03 — 20 March 2008 67 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.22 Write mode: data byte FADER

Table 90. FADER - format of data byte 14h with default setting

7 6 5 4 3 2 1 0

FADM1 FADM0 FAD5 FAD4 FAD3 FAD2 FAD1 FAD0

00000000

Table 91. FADER - data byte 14h bit description

Bit Symbol Description

7 and 6 FADM[1:0] fader mode; enable fader control for front or rear

00 = no fader; front output = 0 dB; rear output = 0 dB

01 = rear fader; front output = 0 dB; rear output = FAD[5:0]

10 = front fader; front output = FAD[5:0]; rear output = 0 dB

11 = output volume; front output = FAD[5:0]; rear output = FAD[5:0]

5 to 0 FAD[5:0] Fader attenuation setting; 00 0000 to 11 1111 = −1 dB to −64 dB. For

output mute control see data byte 15h; OUTPUT (see Table 92).

Product data sheet Rev. 03 — 20 March 2008 68 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.23 Write mode: data byte OUTPUT

[1] Output gain (OUTA) and output mute (MUxx) control is active for all signal selections. Fader control (FADM,

FAD) is active for every signal selection except for the internal audio of ‘external I/O rear only’ mode at the

front output.

The internal audio signal is available on output pins PLOUT and PROUT independent of the EXP bit

setting.

The output level on pins PLOUT and PROUT as well as the input level for pins INPL and INPR is 1 V for the

maximum line output level of 1.4 V (OUTA = 0) or 2 V (OUTA = 1).

Table 92. OUTPUT - format of data byte 15h with default setting

7 6 5 4 3 2 1 0

EXP1 EXP0 EXPS OUTA MULF MURF MULR MURR

00001111

Table 93. OUTPUT - data byte 15h bit description[1]

Bit Symbol Description

7 and 6 EXP[1:0] external processor selection; enable I/O between tone and fader; see

Table 94 and Figure 37

5 EXPS output selector for external processor; see Figure 37

0 = output signal from TREBLE output

1 = output signal from source selector output

4 OUTA output gain

0 = standard output gain

1 = output gain is 3 dB

3 MULF left front output mute

0 = output LFOUT is enabled

1 = output LFOUT is muted

2 MURF right front output mute

0 = output RFOUT is enabled

1 = output RFOUT is muted

1 MULR left rear output mute

0 = output LROUT is enabled

1 = output LROUT is muted

0 MURR right rear output mute

0 = output RROUT is enabled

1 = output RROUT is muted

Table 94. External processor selection

EXP1 EXP0 External I/O mode Front output Rear output

0 0 internal internal audio internal audio

0 1 external input into tone/volume

part external signal via

tone/volume part external signal via

tone/volume part

1 0 external input into fader part external signal external signal

1 1 external input into fader part,

rear only internal signal at

PLOUT/PROUT external signal

Product data sheet Rev. 03 — 20 March 2008 69 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.24 Write mode: data byte BALANCE

[1] The maximum obtainable attenuation of volume and balance is limited to −83 dB. For VOL + BAL attenuation settings below −83 dB;

mute is activated.

Fig 37. External processor connections

001aab552

INPUT GAIN,

VOLUME,

BALANCE,

MUTE

INPUT

SELECT

FRONT/REAR

FADER

BASS,

TREBLE,

LOUDNESS

LROUT

RROUT

INPL

INPR

1 V

INPUT

2 V

−6 dB +3 dB

+3 dB

(+6 dB)

EXP

EXPS

EXP

LFOUT

RFOUT

1.4 V

(2 V)

PLOUT

PROUT

1 V

Table 95. BALANCE - format of data byte 16h with default setting

7 6 5 4 3 2 1 0

BALM BAL6 BAL5 BAL4 BAL3 BAL2 BAL1 BAL0

10000000

Table 96. BALANCE - data byte 16h bit description

Bit Symbol Description

7 BALM balance control mode; sets the balance mode to left or right attenuation

0 = left channel is attenuated

1 = right channel is attenuated

6 to 0 BAL[6:0] balance setting; see Table 97

Table 97. Balance attenuation setting[1]

BAL6 BAL5 BAL4 BAL3 BAL2 BAL1 BAL0 Balance (dB)

00000000

0000001−1

::::::::

1101110−110

1101111−111

1110000mute

Product data sheet Rev. 03 — 20 March 2008 70 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.25 Write mode: data byte LOUDNESS

[1] The VU-meter mode can be used with external sources only. When the VU-meter mode is active, the radio

quality detection of USN, MOD and offset is limited to AF update tuning only. During VU-meter mode the

bits MOD[4:0] indicate the external source input amplitude. The FM dynamic bandwidth control is disabled

and a ﬁxed bandwidth of 113 kHz is deﬁned. However, other ﬁxed bandwidth settings are available by

DYN = 0 and the setting of BW; data byte 0h (see Table 28). See Table 100 for compression recovery timing

control. VU-meter mode is automatically activated when audio compression is on (COMP = 1).

[1] Setting HTC[2:0] is also in use for setting the timing of weak signal high cut control during radio operation.

Table 98. LOUDNESS - format of data byte 17h with default setting

7 6 5 4 3 2 1 0

AVUM ASFD 0 LDON LDHB LDS2 LDS1 LDS0

00 01100

Table 99. LOUDNESS - data byte 17h bit description

Bit Symbol Description

7 AVUM audio VU-meter mode[1]

0 = MOD read information indicates the modulation of the radio

channel

1 and an external input source is selected = MOD read information will

indicate the input amplitude of the selected source

6 ASFD ASI ﬁlter disable

0 = normal operation

1 = no low-pass ﬁlter inserted during ASI

5 - reserved; 0 = normal operation

4 LDON loudness on

0 = loudness control is disabled

1 = loudness control is active; loudness is controlled by the volume

setting

3 LDHB loudness high boost; see Figure 38

0 = loudness control is limited to bass gain

1 = loudness controls bass gain and treble gain

2 to 0 LDS[2:0] loudness start setting; loudness start deﬁnes the volume setting below

which loudness control is activated; see Table 101 and Figure 38

Table 100. VU-meter timing; HTC[2:0] of data byte 0Bh; TIMING[1]

HTC2 HTC1 HTC0 tattack trecovery

0 0 0 0.02 s 0.03 s

0 0 1 0.02 s 0.06 s

0 1 0 0.02 s 0.2 s

0 1 1 0.02 s 5 s

1 0 0 0.02 s 0.6 s

1 0 1 0.02 s 10 s

1 1 0 0.02 s 1 s

1 1 1 0.02 s 2 s

Product data sheet Rev. 03 — 20 March 2008 71 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Table 101. Loudness start

LDS2 LDS1 LDS0 Start of loudness at volume setting

000−12 dB

001−16 dB

010−20 dB

011−24 dB

100−28 dB

101−32 dB

110−36 dB

111−40 dB

a. LDON = 1, LDHB = 0.

b. LDON = 1, LDHB = 1.

Fig 38. Loudness control characteristics; loudness start = −20 dB, bass frequency = 60 Hz,

treble frequency = 10 kHz; bass gain = 0 dB, treble gain = 0 dB

001aab599

−28

−36

−20

−12

gain

(dB)

−44

faudio (kHz) 10 202 × 10−2

−20

VOL =

−22

−24

−26

−28

−30

−32

−34

−36

−38

−40

10−11

001aab553

−28

−36

−20

−12

gain

(dB)

−44

faudio (kHz) 1010−11

VOL =

−22

−20

−24

−26/−28

−30

−32

−34/−36

−38

−40

202 × 10−2

Product data sheet Rev. 03 — 20 March 2008 72 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.26 Write mode: data byte POWER

[1] The power saving offered by the Standby modes is limited and is not intended to realize an effective

power-down.

8.2.27 Write mode: data bytes RESERVED

[1] Reserved bits may control test options for factory testing.

Table 102. POWER - format of data byte 18h with default setting

7 6 5 4 3 2 1 0

0 STBT 0 ASC1 ASC0 ASI AST1 AST0

0 00110

Table 103. POWER - data byte 18h bit description[1]

Bit Symbol Description

7 - reserved; 0 = normal operation

6 STBT standby tuner

0 = normal operation

1 = power consumption is reduced by disabling part of the tuner circuit;

radio operation is disabled

5 - reserved; 0 = normal operation

4 and 3 ASC[1:0] ASI clock frequency

00 = 10 MHz

01 = 5 MHz

10 = 2.5 MHz

11 = 1.3 MHz

2 ASI audio step interpolation

0 = audio step interpolation is disabled

1 = audio step interpolation is enabled

1 and 0 AST[1:0] ASI step time; selection of the audio step interpolation time

00 = 1 ms

01 = 3 ms

10 = 10 ms

11 = 30 ms

Table 104. RESERVED - format of data byte 19h to 1Eh

7 6 5 4 3 2 1 0

00000000

Table 105. RESERVED - data byte 19h to 1Eh bit description[1]

Bit Symbol Description

7 to 0 - reserved; 0 = normal operation

Product data sheet Rev. 03 — 20 March 2008 73 of 108

NXP Semiconductors TEF6904A

Integrated car radio

8.2.28 Write mode: data bytes TEST

9. Limiting values

[1] The maximum voltage should be less than 10 V.

[2] Class 2 according to JESD22-A114D.

[3] Class B according to EIA/JESD22-A115-A.

[4] Class 1C according to JESD22-A114D.

[5] Class A according to EIA/JESD22-A115-A.

Table 106. RESERVED - format of data byte 1Fh

7 6 5 4 3 2 1 0

RBWR 0 TEST5 TEST4 TEST3 TEST2 TEST1 TEST0

0 000000

Table 107. TEST - data byte 1Fh bit description

Bit Symbol Description

7 RBWR next I2C-bus read contains write register data (RBWR will be reset to logic 0 after read)

6 - reserved; 0 = normal operation

5 to 0 TEST[5:0] test mode

00 0000 = normal operation

00 1011 = AM IF noise blanker disabled

00 1110 = AM IF noise blanker disabled

01 1001 = AM audio noise blanker and FM noise blanker disabled

all other settings are reserved

Table 108. Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134).

Symbol Parameter Conditions Min Max Unit

VCC analog supply voltage on pins VCC,

VCCPLL, VCCVCO, VCCRF,

AMMIX2OUT1, AMMIX2OUT2, MIX1OUT1

and MIX1OUT2

−0.3 +10 V

∆VCC voltage difference between any VCC pins −0.3 +0.3 V

VV60 supply voltage for FM ﬁlter and demodulator [1] −0.3 VCC + 0.3 V

VIdigital input voltage on pins SCL, SDA and

ADDR −0.3 +5.5 V

Vnvoltage on all other pins [1] −0.3 VCC + 0.3 V

Tstg storage temperature −40 +150 °C

Tjjunction temperature - +150 °C

Tamb ambient temperature −40 +85 °C

Vesd electrostatic discharge voltage on

all pins except VCCVCO human body model [2] −2000 +2000 V

machine model [3] −200 +200 V

pin VCCVCO human body model [4] −1750 +1750 V

machine model [5] −175 +175 V

Product data sheet Rev. 03 — 20 March 2008 74 of 108

NXP Semiconductors TEF6904A

Integrated car radio

10. Thermal characteristics

11. Static characteristics

Table 109. Thermal characteristics

Symbol Parameter Conditions Typ Unit

Rth(j-a) thermal resistance from junction to ambient in free air 53 K/W

Rth(j-c) thermal resistance from junction to case 14 K/W

Table 110. Static characteristics

= 8.5 V; T

amb

=25

C; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Supply voltage

VCC analog supply voltage on pins VCC,

VCCPLL, VCCVCO, VCCRF,

AMMIX2OUT1, AMMIX2OUT2,

MIX1OUT1 and MIX1OUT2

8 8.5 9 V

VV60 supply voltage for FM ﬁlter and

demodulator 5.5 7.2 - V

Current in FM mode

ICC supply current Tamb =−40 °C - 49 - mA

Tamb =25°C 404960mA

Tamb =85°C - 49 - mA

ICCPLL supply current for tuning PLL Tamb =−40 °C - 4.0 - mA

Tamb =25°C 2.9 3.6 5 mA

Tamb =85°C - 3.3 - mA

ICCVCO supply current for VCO Tamb =−40 °C - 2.2 - mA

Tamb =25°C - 2.1 - mA

Tamb =85°C - 2.0 - mA

ICCRF supply current for RF Tamb =−40 °C - 12 16 mA

Tamb =25°C 10.5 13.5 16.5 mA

Tamb =85°C - 14 18.5 mA

IV60 supply current for FM ﬁlter and

demodulator Tamb =−40 °C - 28 - mA

Tamb =25°C 222834mA

Tamb =85°C - 28 - mA

IMIX1OUT1;

IMIX1OUT2

bias current of FM and AM mixer 1 at

output 1 or output 2 Tamb =−40 °C - 5.3 - mA

Tamb =25°C 4.3 5.7 7.5 mA

Tamb =85°C - 6.0 8.0 mA

Current in AM mode

ICC supply current Tamb =−40 °C - 58 - mA

Tamb =25°C 445875mA

Tamb =85°C - 58 - mA

Product data sheet Rev. 03 — 20 March 2008 75 of 108

NXP Semiconductors TEF6904A

Integrated car radio

ICCPLL supply current for tuning PLL Tamb =−40 °C - 3.9 - mA

Tamb =25°C 2.9 3.6 5 mA

Tamb =85°C - 3.2 - mA

ICCVCO supply current for VCO Tamb =−40 °C - 2.2 - mA

Tamb =25°C - 2.1 - mA

Tamb =85°C - 2.0 - mA

ICCRF supply current for RF Tamb =−40 °C - 8.8 - mA

Tamb =25°C 6.7 8.8 13 mA

Tamb =85°C - 8.8 - mA

IV60 supply current for FM ﬁlter and

demodulator Tamb =−40 °C - 8.0 - mA

Tamb =25°C 6 7.8 10.2 mA

Tamb =85°C - 7.5 - mA

IMIX1OUT1;

IMIX1OUT2

bias current of FM and AM mixer 1 at

output 1 or output 2 Tamb =−40 °C - 3.6 - mA

Tamb =25°C 2.6 3.45 4.5 mA

Tamb =85°C - 3.3 - mA

IAMMIX2OUT1;

IAMMIX2OUT2

bias current of AM mixer 2 at output 1

or output 2 Tamb =−40 °C - 5.5 - mA

Tamb =25°C 3.7 4.6 5.5 mA

Tamb =85°C - 3.7 - mA

Logic: pin ADDR

VIH HIGH-level input voltage 1.75 - 5.5 V

VIL LOW-level input voltage −0.2 - +1.0 V

Power-on reset; all registers in default setting, outputs muted, Standby mode

Vth(POR) threshold value of VCC for power-on

reset VCC drop during

operation

Tamb =−40 °C - 6.8 - V

Tamb =25°C 6.15 6.3 6.45 V

Tamb =85°C - 5.8 - V

Table 110. Static characteristics

…continued

= 8.5 V; T

amb

=25

C; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 03 — 20 March 2008 76 of 108

NXP Semiconductors TEF6904A

Integrated car radio

12. Dynamic characteristics

12.1 Dynamic characteristics of the tuner

Table 111. Dynamic characteristics of the tuner

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Crystal oscillator

fxtal crystal frequency - 20.5 - MHz

C/N carrier-to-noise ratio fxtal = 20.5 MHz; ∆f = 10 kHz 112 - -

Circuit inputs: pins XTAL1 and XTAL2

Vo(osc)(rms) oscillator output voltage

(RMS value) [1] 80 100 160 mV

Rireal part of input

impedance VXTAL1-XTAL2 =1mV [1] -−500 −250 Ω

Ciinput capacitance [1] -8 - pF

Tuning system; see Table 38,Table 39 and Table 41

Voltage controlled oscillator

fosc(min) minimum oscillator

frequency - - 153.6 MHz

fosc(max) maximum oscillator

frequency 256 - - MHz

C/N carrier-to-noise ratio fosc = 200 MHz; ∆f = 10 kHz;

Q≥ 30 -98-

RR ripple rejection; fripple = 100 Hz;

VCC(ripple) = 50 mV (RMS);

fosc = 200 MHz; FM mode

44 50 - dB

Charge pump: pin CPOUT; see Table 40

Isink(CP1) charge pump CP1 sink

current VCPOUT = 0.5 V to

VCCPLL −1.3 V; fref = 100 kHz 130 180 240 µA

Isource(CP1) charge pump CP1

source current VCPOUT = 0.5 V to

VCCPLL −1.3 V; fref = 100 kHz −240 −180 −130 µA

Isink(CP2) charge pump CP2 sink

current VCPOUT = 0.7 V to

VCCPLL −1.5 V; fref = 50 kHz 270 360 480 µA

Isource(CP2) charge pump CP2

source current VCPOUT = 0.7 V to

VCCPLL −1.5 V; fref = 50 kHz −480 −360 −270 µA

Isink(CP3) charge pump CP3 sink

current VCPOUT = 0.7 V to

VCCPLL −0.7 V;

fref = 20 kHz or 25 kHz

580 780 1050 µA

Isource(CP3) charge pump CP3

source current VCPOUT = 0.7 V to

VCCPLL −0.7 V;

fref = 20 kHz or 25 kHz

−1050 −780 −580 µA

Isink(CP4) charge pump CP4 sink

current VCPOUT = 0.7 V to

VCCPLL −0.7 V; fref = 20 kHz 1040 1400 1900 µA

Isource(CP4) charge pump CP4

source current VCPOUT = 0.7 V to

VCCPLL −0.7 V; fref = 20 kHz −1900 −1400 −1040 µA

dBc

----------

dBc

----------

RR VCC(ripple)

VMPXAM

------------------------

Product data sheet Rev. 03 — 20 March 2008 77 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Isink(CP5) charge pump CP5 sink

current VCPOUT = 0.7 V to

VCCPLL −0.7 V; fref = 10 kHz 1630 2200 2970 µA

Isource(CP5) charge pump CP5

source current VCPOUT = 0.7 V to

VCCPLL −0.7 V; fref = 10 kHz −2970 −2200 −1630 µA

Charge pump: pin VTUNE

Isink charge pump sink

current VVTUNE = 0.8 V to

VCCPLL −0.7 V 2070 2800 3780 µA

Isource charge pump source

current VVTUNE = 0.8 V to

VCCPLL −0.7 V −3780 −2800 −2070 µA

ttune tuning time Europe FM and US FM band;

fref = 100 kHz; fRF = 87.5 MHz

to 108 MHz

- 0.75 1 ms

AM MW band; fref = 20 kHz;

fRF = 0.53 MHz to 1.7 MHz - 5 20 ms

Tcy inaudible AF update

cycle time including

1 ms mute start and

1 ms mute release time

- 6 6.5 ms

Antenna Digital Auto Alignment (DAA)

DAA: pin DAAOUT[2]

Ileak(DAA) antenna DAA input

leakage current on pin

VTUNE (test mode)

VVTUNE = 0.4 V to 8 V −10 - +10 nA

∆Vo(T) output voltage variation

with temperature Tamb =−40 °C to +85 °C;

DAA[6:0] = 100 0000 −30 - +30 mV

∆Vo(sink) output voltage variation

caused by sink current VVTUNE =4V; I

L=50µA−VLSB -+V

LSB

∆Vo(source) output voltage variation

caused by source

current

VVTUNE =4V; I

L=−50 µA−VLSB -+V

LSB

tst settling time VDAAOUT = 0.2 V to 8.25 V;

CL= 270 pF -3060 µs

AM mode

Vooutput voltage DAA[6:0] = 000 0000 - - 0.5 V

DAA[6:0] = 111 1111 8.0 - 8.5 V

FM mode

Vo(n) output noise voltage VVTUNE =4V;

DAA[6:0] = 100 0000;

B = 300 Hz to 22 kHz

- 30 100 µV

RR ripple rejection VVTUNE =4V;

DAA[6:0] = 101 0101;

fripple = 100 Hz;

VCC(ripple) = 100 mV

-40- dB

∆Vo(step) step accuracy VVTUNE =2V −0.5VLSB 0 +0.5VLSB

Table 111. Dynamic characteristics of the tuner

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 03 — 20 March 2008 78 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Vooutput voltage VVTUNE = 0.5 V;

DAA[6:0] = 000 0000 - - 0.5 V

VVTUNE = 4.25 V;

DAA[6:0] = 111 1111 8- - V

VVTUNE =4V

DAA[6:0] = 000 0000 - - 0.5 V

DAA[6:0] = 100 0000 3.8 4.23 4.65 V

VVTUNE =2V

DAA[6:0] = 101 0101 2.45 2.74 3.05 V

DAA[6:0] = 010 1010 1.3 1.46 1.6 V

AM channel

AM RF AGC detector A: pin AMMIX1IN; see Figure 39

VAMMIX1IN(p-p) AM AGC start level

(peak-to-peak value) AGC[1:0] = 00; m = 1 700 1000 1400 mV

AM RF AGC detector B: pin AMIF2IN; see Figure 39

VAMIF2IN(p-p) IF voltage on pin

AMIF2IN for AGC start

(peak-to-peak value)

m = 1; fmod = 400 Hz - 0.23 - V

RF cascode AGC

∆AGC AGC control range - 10 - dB

VVAMCAS cascode base voltage AGC[1:0] = 00; maximum gain

at cascode AGC -5 - V

RVAMCAS cascode base source

resistance - 1.6 - kΩ

IVAMCAS cascode base current

drive capability source current 100 - - µA

sink current - 0 - µA

VVAMCASFB cascode emitter

DC voltage minimum gain at cascode

AGC - 320 - mV

maximum gain at cascode

AGC

KAGC = 1 - 800 - mV

KAGC = 0 - 4.15 - V

IVAMCASFB cascode feedback

current -- 2 µA

RF PIN diode AGC current generator output: pin IAMAGC

∆AGC AGC control range fRF = 999 kHz; dummy aerial

15 pF/60 pF -50- dB

Isink(max) maximum AGC sink

current VIAMAGC >1V 10 - - mA

Isource AGC source current AGC not active - −2.5 - µA

Isink(FM) AGC sink current in

FM mode AGCSW = 1 0.5 1 - mA

AGCSW = 0 - - 100 nA

Table 111. Dynamic characteristics of the tuner

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 03 — 20 March 2008 79 of 108

NXP Semiconductors TEF6904A

Integrated car radio

CIAMAGC source current

generator output

capacitance

-3 - pF

VVDCPIN bias voltage for AM PIN

diode 4.5 5 5.5 V

RVDCPIN bias source resistance - 150 - Ω

Ibias(max) maximum bias current source current 20 - - mA

sink current 30 - - µA

AM mixer 1 (IF1 = 10.7 MHz)

Mixer input: pins AMMIX1IN and AMMIX1DEC

Riinput resistance [3] 10 13.2 16 kΩ

Ciinput capacitance [3] -3 - pF

Vi(max) maximum input voltage 1 dB compression point of

VMIX1OUT1-MIX1OUT2; m=0 500 - - mV

Mixer output: pins MIX1OUT1 and MIX1OUT2

Vo(max)(p-p) maximumoutputvoltage

(peak-to-peak value) -12- V

gm(conv) conversion

transconductance Io/V

1.75 2.5 3.25

gm(conv)(T) conversion

transconductance

variation with

temperature related to

Tamb =25°C

Tamb =−40 °C-1-dB

Tamb =85°C-−0.2 - dB

Rooutput resistance [4] 100 - - kΩ

Cooutput capacitance [4] -4 7 pF

IP3 3rd-order intercept point RL= 2.6 kΩ(AC load between

output pins); ∆f = 300 kHz 135 138 - dBµV

IP2 2nd-order intercept

point RL= 2.6 kΩ(AC load between

output pins) - 170 - dBµV

Vi(n)(eq) equivalent input noise

voltage band limited noise;

Rgen = 750 Ω; noise of Rgen

included; RL= 2.6 kΩ

(AC load between output pins)

- 5.8 8

F noise ﬁgure of

AM mixer 1 - 4.5 7.1 dB

AM mixer 2 (IF2 = 450 kHz)

Mixer input: pins IF1IN and IF1DEC

Riinput resistance [5] - 330 - Ω

Ciinput capacitance [5] -3 - pF

Vi(max)(p) maximum input voltage

(peak value) 1 dB compression point of

VAMMIX2OUT1-AMMIX2OUT2

1.1 1.4 - V

Table 111. Dynamic characteristics of the tuner

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

--------

----------

Product data sheet Rev. 03 — 20 March 2008 80 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Mixer output: pins AMMIX2OUT1 and AMMIX2OUT2

Rooutput resistance [6] 50 - - kΩ

Cooutput capacitance [6] -3 - pF

Vo(max)(p-p) maximumoutputvoltage

(peak-to-peak value) VCCAMMIX2 = 8.5 V - 12 - V

gm(conv) conversion

transconductance Io/V

1.2 1.6 2.1

gm(conv)(T) conversion

transconductance

variation with

temperature related to

Tamb =25°C

Tamb =−40 °C to +85 °C−1 0 +1 dB

IP3 3rd-order intercept point RL= 1.5 kΩ(AC load between

output pins); ∆f = 300 kHz 134 137 - dBµV

IP2 2nd-order intercept

point RL= 1.5 kΩ(AC load between

output pins) - 170 - dBµV

Vi(n)(eq) equivalent input noise

voltage Rgen = 330 Ω; noise of Rgen

included; RL= 1.5 kΩ

(AC load between output pins)

-1522

F noise ﬁgure of

AM mixer 2 - 16 19.5 dB

Ileak mixer leakage current FM mode;

Tamb =−40 °Cto+85°C-- 10 µA

AM IF2 AGC stage: pins AMIF2IN and AMIF2DEC[5]

Riinput resistance 1.6 2 2.4 kΩ

Ciinput capacitance - 5 - pF

Viinput voltage for α=−10 dB audio

attenuation at MPXAMOUT -1020 µV

VAGC(stop) AGC stop voltage (input

carrier voltage) 100 - - mV

AM demodulator output: pin MPXAMOUT

Vsens sensitivity voltage m = 0.3; fmod = 400 Hz;

BAF = 2.15 kHz; Rgen =2kΩ

(S+N)/N = 26 dB - 60 90 µV

(S+N)/N = 46 dB - 600 900 µV

(S+N)/N maximum signal plus

noise-to-noise ratio m = 0.3; fmod = 400 Hz;

BAF = 2.15 kHz; Rgen =2kΩ54 60 - dB

VoMPXAMOUT output

voltage m = 0.3; fmod = 400 Hz;

Vi= 100 µV to 100 mV 200 255 320 mV

THD total harmonic distortion BAF = 2.15 kHz;

VAMIF2IN = 100 µV to 100 mV;

m = 0.8; fmod = 400 Hz

- 0.5 1 %

tst AM AGC settling time VAMIF2IN = 100 µV to 100 mV - 165 - ms

VAMIF2IN = 100 mV to 100 µV - 440 - ms

Rooutput resistance - - 500 Ω

Table 111. Dynamic characteristics of the tuner

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

--------

----------

Product data sheet Rev. 03 — 20 March 2008 81 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Cooutput capacitance - 3 - pF

ZLload impedance 10 - - kΩ

RR ripple rejection fripple = 100 Hz;

VCC(ripple) = 50 mV (RMS);

VAMIF2IN = 10 mV

20 26 - dB

AM level detector output: pin LEVEL

Input: pins AMIF2IN and AMIF2DEC

LST level start alignment

position Vi(AMIF2IN) =95µV; level slope

aligned to (800 ±50) mV/dec;

level start aligned to

VLEVEL = (1.24 ±0.04) V

6 - 25 -

∆VLEVEL step size for adjustment

of level starting point VAMIF2IN = 0 V; default setting

of level slope 20 40 72 mV

LSL level slope alignment

position level slope measured from

Vi(AMIF2IN) =95µV to

Vi(AMIF2IN) = 950 µV; level

slope aligned to

(800 ±50) mV/dec

0- 7 -

∆Vstep step size for adjustment

of level slope VAMIF2IN = 1.4 mV 40 60 80

∆VLEVEL(T) level voltage drift over

temperature Tamb = −40 °C to +85 °C - 0.03 -

Rooutput resistance - - 500 Ω

RLoutput load resistance 25 - - kΩ

CL(max) maximum load

capacitance - - 25 pF

RR ripple rejection VCC(ripple) = 50 mV (RMS);

fripple = 100 Hz;

VAMIF2IN =10mV

-24- dB

AM noise blanker IF part

tsup suppression time at IF2 IF2 = 450 kHz 7 15 25 µs

Vth noise blanker trigger

threshold noise pulse at RF input

(

CISPR 16-1

);

repetition rate = 100 Hz; pulse

duration 5 ns; trand tf< 1 ns;

measured at dummy aerial

input (15 pF/60 pF)

NBL[1:0] = 00 - 1.4 - V

NBL[1:0] = 01 - 1.0 - V

NBL[1:0] = 10 - 0.7 - V

mth modulation threshold for

blanking of audio signal maximum modulation, which

triggers the blanking circuit in

the audio part; LODX = 0

-5 - %

Table 111. Dynamic characteristics of the tuner

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

RR VCC(ripple)

VMPXAMOUT

-----------------------------

dec

--------

------

RR VCC(ripple)

VLEVEL(AC)

---------------------------

Product data sheet Rev. 03 — 20 March 2008 82 of 108

NXP Semiconductors TEF6904A

Integrated car radio

FM channel

FM RF AGC (FM distance mode; LODX = 0)

Inputs: pins FMMIX1IN1 and FMMIX1IN2

[7]

Vi(RF) RF input voltage for

start of wideband AGC AGC[1:0] = 11 - 9 - mV

PIN diode drive output: pin IFMAGC

Isource(max) maximum AGC source

current AGC[1:0] = 00; KAGC = 0;

Vi(RF) >V

AGC(start);

see Table 34

−15 −10 −7mA

Isink(max) maximum AGC sink

current at AGC recovery AGC[1:0] = 00; KAGC = 0 7 10 15 mA

Isource AGC source current AM mode; AGCSW = 1 −6−4−2.5 mA

AM mode; AGCSW = 0 - 0 - mA

LODX = 1 (FM local) −0.75 −0.5 −0.35 mA

Voltage for narrow-band AGC: pin LEVEL

Vth threshold voltage for

narrow-band AGC KAGC = 1 (keyed AGC) 500 950 1400 mV

FM mixer 1 (IF1 = 10.7 MHz)

Mixer input: pins FMMIX1IN1 and FMMIX1IN2

[7]

and mixer output: pins MIX1OUT1 and MIX1OUT2

[4]

Riinput resistance RFGAIN = 0 3 3.8 4.7 kΩ

RFGAIN = 1 1.6 2.0 2.5 kΩ

Ciinput capacitance - 2 4 pF

Rooutput resistance 100 - - kΩ

Cooutput capacitance - 4 6 pF

Vi(RF)(max) maximum RF input

voltage 1 dB compression point of

FM mixer output voltage 75 100 - mV

Vi(n)(eq) equivalent input noise

voltage Rgen = 200 Ω; noise of Rgen

included; RL= 2.6 kΩ- 2.7 3.2

gm(conv) conversion

transconductance Io/V

RFGAIN = 0 12 18 25

RFGAIN = 1 24 36 50

gm(conv)(T) conversion

transconductance

variation with

temperature

-−0.2 ×10−2-K

−1

F noise ﬁgure Rgen = 300 Ω

Tamb =−40 °C - 2.8 - dB

Tamb =25°C - 3.1 4.6 dB

Tamb =85°C - 3.5 - dB

Rgen recommended

generator resistance - 200 - Ω

IP3 3rd-order intercept point RFGAIN = 0 - 120 - dBµV

Table 111. Dynamic characteristics of the tuner

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

----------

--------

Product data sheet Rev. 03 — 20 March 2008 83 of 108

NXP Semiconductors TEF6904A

Integrated car radio

IRR image rejection ratio fRFwanted = 87.5 MHz;

fRFimage = 108.9 MHz 25 35 - dB

Vo(max)(p-p) maximumoutputvoltage

(peak-to-peak value) 4.5 5.6 - V

FM ﬁlter and demodulator

Tunable ﬁlter

Bmax maximum bandwidth DYN = 1 - 165 - kHz

DYN = 0 - 165 - kHz

Bmin minimum bandwidth DYN = 1 - 57 - kHz

DYN = 0 - 57 - kHz

∆fIF2 FMIF2centerfrequency

alignment step size - 2 - kHz

fIF2(T) temperature

dependence of IF2

center frequency

−60 - +60

FM demodulator

FM mixer 2 input: pins IF1IN and IF1DEC

[5]

and output: pin MPXAMOUT

Riinput resistance 275 330 400 Ω

Rooutput resistance - - 500 Ω

RLload resistance 20 - - kΩ

CLload capacitance - - 20 pF

Vi(max) maximum input voltage - 280 - mV

Vi(start)(lim) input voltage for start of

limiting of VMPXAMOUT

αAF =−3 dB - 2.3 - µV

Vi(sens) sensitivity input voltage ∆f = 22.5 kHz; fmod = 1 kHz;

de-emphasis = 50 µs

(S+N)/N = 26 dB;

Rgen = 330 Ω-5 - µV

(S+N)/N = 46 dB - 41 - µV

(S+N)/N ultimate signal plus

noise-to-noise ratio on

pin MPXAMOUT

∆f = 22.5 kHz; fmod = 1 kHz;

Vi= 3 mV;

de-emphasis = 50 µs;

B = 300 Hz to 22 kHz

75 78 - dB

THD total harmonic distortion

of VMPXAMOUT

∆f = 75 kHz; fmod = 1 kHz;

Vi=10mV - 0.5 1 %

∆fmax maximum FM deviation THD = 3 %; fmod = 1 kHz;

Vi=10mV 120 180 - kHz

αAM AM suppression FM reference: ∆f = 22.5 kHz;

fmod = 1 kHz;

AM: m = 0.3; fmod = 1 kHz;

de-emphasis = 50 µs

10 µV<V

i<1V - 40 - dB

100 µV<V

i< 1 V - 50 - dB

Table 111. Dynamic characteristics of the tuner

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Vowanted

Voimage

-------------------

------

VMPXAMOUT(FM)

VMPXAMOUT(AM)

---------------------------------------

Product data sheet Rev. 03 — 20 March 2008 84 of 108

NXP Semiconductors TEF6904A

Integrated car radio

[1] Measured between pins XTAL1 and XTAL2.

[2] Conversion gain formula of DAA: where n = 0 to 127.

[3] Input parameters of AM mixer 1 measured between pins AMMIX1IN and AMMIX1DEC.

[4] Output parameters of FM and AM mixer 1 measured between pins MIX1OUT1 and MIX1OUT2.

[5] Input parameters of FM mixer 2 measured between pins IF1IN and IF1DEC.

[6] Output parameters of AM mixer 2 measured between pins AMMIX2OUT1 and AMMIX2OUT2.

[7] Input parameters of FM mixer 1 measured between pins FMMIX1IN1 and FMMIX1IN2.

[8] Input parameters of AM mixer 2 measured between pins AMIF2IN and AMIF2DEC.

Vooutput voltage Vi=20µVto1V [4]

∆f = 1.2 kHz; fmod = 57 kHz - 7 - mV

∆f = 22.5 kHz; fmod = 1 kHz 180 230 290 mV

fcut cut-off frequency CL= 0 F; RL>20kΩ- 65 - kHz

RR ripple rejection fripple = 100 Hz to 20 kHz;

VCC(ripple) = 50 mV;

VIF1IN =3mV

-36- dB

FM level detector output: pin LEVEL[5]

Rooutput resistance - - 500 Ω

RLload resistance 25 - - kΩ

CLload capacitance - - 25 pF

LST level start alignment

position Vi(IF1IN) = 135 µV; level slope

aligned to (800 ±50) mV/dec;

level start aligned to

VLEVEL = (1.47 ±0.04) V

6 - 25 -

∆VLEVEL step size of level start

adjustment LSL[2:0] = 100 20 40 72 mV

LSL level slope alignment

position level slope measured from

Vi(IF1IN) = 135 µV to

Vi(IF1IN) = 1.35 mV; level slope

aligned to (800 ±50) mV/dec

0- 7 -

∆Vstep step size of level slope

adjustment Vi= 1 mV 40 60 80

RR ripple rejection VCC(ripple) =50mV;

fripple = 100 Hz -25- dB

IF counter (FM IF2 or AM IF2 counter); see Table 8

Pins IF1IN and IF1DEC[5]

Vi(sens) sensitivity voltage FM mode - 5 10 µV

Pins AMIF2IN and AMIF2DEC[8]

Vi(sens) sensitivity voltage AM mode; m = 0 - 70 260 µV

Table 111. Dynamic characteristics of the tuner

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

RR VCC(ripple)

VMPXAMOUT

-----------------------------

dec

--------

RR VCC(ripple)

Vlevel(AC)

------------------------

VDAAOUT 1.915 n

128

---------

×0.1+





VVTUNE

×=

Product data sheet Rev. 03 — 20 March 2008 85 of 108

NXP Semiconductors TEF6904A

Integrated car radio

12.2 Dynamic characteristics of the sound processor

Fig 39. AM AGC circuit

008aaa016

JFET

LNA CASCODE

AGC

FILTER

AGC

THRESHOLD

MIXER1

MIXER2

detector A

enable 1 mA

pin diode current

(FM mode)

AGCSW

reduce cascode

AGC control range

KAGC

detector B

4036, 373527, 282523199

diode

IAMAGCTRFAGC

RFIN

AGC threshold

AGC[1:0]

VAMCAS

VAMCASFB AMMIX1IN AMMIX2OUT1,

AMMIX2OUT2

TEF6904AH

AMIF2IN

MIX1OUT1,

MIX1OUT2 IF1IN

Table 112. Dynamic characteristics of the sound processor

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; treble: 10 kHz ﬁlter frequency; treble = 0 dB;

bass: 60 Hz ﬁlter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

Ω

; C

= 1 nF; internal channel; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Stereo decoder and AM path

Vo(FM) FM mono output voltage

on pins LFOUT and

RFOUT

fMPXAMOUT = 1 kHz;

30 % FM modulation without

pilot

- 330 - mV

Vo(AM) AM output voltage on

pins LFOUT and RFOUT fAM = 1 kHz;

30 % AM modulation - 365 - mV

αcs channel separation fFMMPX = 1 kHz 40 - - dB

gf(L-R) stereo adjust for ﬁne

adjustment of separation measure 1 kHz level for L −R

modulation; compare to 1 kHz

level for L + R modulation

CSA[3:0] = 0000 - 0 - dB

CSA[3:0] = 0001 - 0.2 - dB

:-:-dB

CSA[3:0] = 1110 - 2.8 - dB

CSA[3:0] = 1111 - 3.0 - dB

Product data sheet Rev. 03 — 20 March 2008 86 of 108

NXP Semiconductors TEF6904A

Integrated car radio

S/N signal-to-noise ratio fMPXAMIN = 20 Hz to 15 kHz;

referenced to 1 kHz at

91 % FM modulation;

DEMP = 1

70 - - dB

THD total harmonic distortion FM mode; DEMP = 1;

measured with 15 kHz

brick-wall low-pass ﬁlter

fMPXAMIN = 200 Hz to

15 kHz - - 0.3 %

VMPXAMIN = 50 %; L; pilot on - - 0.3 %

VMPXAMIN = 50 %; R;

pilot on - - 0.3 %

Vo(bal) mono channel balance FM mode −1 - +1 dB

α19 pilot signal suppression 9 % pilot; fpilot = 19 kHz;

referenced to 1 kHz at

91 % FM modulation;

DEMP = 1

40 50 - dB

αsubcarrier suppression modulation off; referenced to

1 kHz at 91 % FM modulation

fsc = 38 kHz 35 50 - dB

fsc = 57 kHz 40 - - dB

fsc = 76 kHz 50 60 - dB

PSRR power supply ripple

rejection FM mode; fripple = 100 Hz;

VCC(AC) =V

ripple = 100 mV

(RMS)

24 - - dB

∆Vout frequency response FM mode

fMPXAMIN =20Hz −0.5 - +0.5 dB

fMPXAMIN =20kHz −0.5 - +0.5 dB

fcut(de-em) cut-off frequency of

de-emphasis ﬁlter −3 dB point; see Figure 31

DEMP = 1 (τ=50µs) - 3.18 - kHz

DEMP = 0 (τ=75µs) - 2.12 - kHz

mi(pilot) pilot threshold

modulation for automatic

switching by pilot input

voltage

stereo

on - 4.0 5.5 %

off 1.3 2.7 - %

hyspilot hysteresis of pilot

threshold voltage -2-dB

Noise blanker

FM part

tsup(min) minimum suppression

time -15-µs

Table 112. Dynamic characteristics of the sound processor

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; treble: 10 kHz ﬁlter frequency; treble = 0 dB;

bass: 60 Hz ﬁlter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

Ω

; C

= 1 nF; internal channel; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

VoL

VoR

---------

Product data sheet Rev. 03 — 20 March 2008 87 of 108

NXP Semiconductors TEF6904A

Integrated car radio

VMPXAMIN(M) noise blanker sensitivity

at MPXAMIN input

(peak value of noise

pulses)

tpulse =10µs; fpulse = 100 Hz

NBS[1:0] = 00 - 65 - mV

NBS[1:0] = 01 - 100 - mV

NBS[1:0] = 10 - 125 - mV

NBS[1:0] = 11 - 160 - mV

VLEVEL(M) noise blanker sensitivity

at LEVEL output

(peak value of noise

pulses) (test mode)

tpulse =10µs; fpulse = 100 Hz

NBL[1:0] = 00 - 10 - mV

NBL[1:0] = 01 - 25 - mV

NBL[1:0] = 10 - 36 - mV

NBL[1:0] = 11 - 50 - mV

AM audio part

tsup(min) minimum suppression

time - 400 - µs

MAM noise blanker sensitivity;

triggered from pulses at

MPXAMIN slew rate

NBS[1:0] = 00 - 16.5 - V/ms

NBS[1:0] = 01 - 18.6 - V/ms

NBS[1:0] = 10 - 21 - V/ms

NBS[1:0] = 11 - 23.5 - V/ms

Weak signal processing

Detectors

VeqUSN/∆f USN equivalent voltage

to frequency deviation

ratio

see Figure 24;

fMPXAMOUT = 150 kHz;

VMPXAMOUT = 250 mV;

HCMP = 1

[1]

USS[1:0] = 00 - −0.06 - V/kHz

USS[1:0] = 01 - −0.08 - V/kHz

USS[1:0] = 10 - −0.12 - V/kHz

USS[1:0] = 11 - −0.16 - V/kHz

VeqWAM/VLEV(p-p) WAM equivalent voltage

to peak-to-peak voltage

on pin LEVEL ratio

see Figure 24;

VLEVEL = 200 mV (p-p) at

f = 21 kHz on the level

voltage; HCMP = 1

[1]

WAS[1:0] = 00 - −7.5 - -

WAS[1:0] = 01 - −10 - -

WAS[1:0] = 10 - −15 - -

WAS[1:0] = 11 - −20 - -

Table 112. Dynamic characteristics of the sound processor

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; treble: 10 kHz ﬁlter frequency; treble = 0 dB;

bass: 60 Hz ﬁlter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

Ω

; C

= 1 nF; internal channel; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 03 — 20 March 2008 88 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Setting of time constants for SNC, MUTE and HCC

tUSN(attack) USN detector attack time soft mute and SNC - 1 - ms

tUSN(recovery) USN detector recovery

time soft mute and SNC - 1 - ms

∆USS USN detector

desensitization USN sensitivity setting (USS)

versus level voltage (USN

sensitivity setting is

automatically reduced as level

voltage decreases)

VLEVEL > 1.25 V - - 3 -

1.25 V > VLEVEL > 1.125 V - - 2 -

1.125 V > VLEVEL > 1.0 V - - 1 -

1.0 V > VLEVEL -- 0-

tWAM(attack) WAM detector attack

time (SNC) -1-ms

tWAM(recovery) WAM detector recovery

time (SNC) -1-ms

tpeak(USN)(attack) peak detector attack time

for USN read-out via

I2C-bus

-1-ms

tpeak(USN)(recovery) peak detector recovery

time for USN read-out via

I2C-bus

-10-ms

tpeak(WAM)(attack) peak detector attack time

for WAM read-out via

I2C-bus

-1-ms

tpeak(WAM)(recovery) peak detector recovery

time for WAM read-out

via I2C-bus

-10-ms

Table 112. Dynamic characteristics of the sound processor

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; treble: 10 kHz ﬁlter frequency; treble = 0 dB;

bass: 60 Hz ﬁlter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

Ω

; C

= 1 nF; internal channel; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 03 — 20 March 2008 89 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Control functions

Vstart(mute) soft mute start voltage FM mode; see Figure 28;

equivalent level voltage that

causes αmute = 3 dB;

MSL[1:0] = 11

MST[2:0] = 000 - 0.75 - V

MST[2:0] = 001 - 0.88 - V

MST[2:0] = 010 - 1 - V

MST[2:0] = 011 - 1.12 - V

MST[2:0] = 100 - 1.25 - V

MST[2:0] = 101 - 0.68 - V

MST[2:0] = 110 - 0.73 - V

MST[2:0] = 111 - 0.85 - V

AM mode; see Figure 29;

equivalent level voltage that

causes αmute = 3 dB;

MSL[1:0] = 11

MST[2:0] = 000 - 1.35 - V

MST[2:0] = 001 - 1.58 - V

MST[2:0] = 010 - 1.80 - V

MST[2:0] = 011 - 1.12 - V

MST[2:0] = 100 - 1.25 - V

MST[2:0] = 101 - 1.50 - V

MST[2:0] = 110 - 1.70 - V

MST[2:0] = 111 - 1.91 - V

Table 112. Dynamic characteristics of the sound processor

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; treble: 10 kHz ﬁlter frequency; treble = 0 dB;

bass: 60 Hz ﬁlter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

Ω

; C

= 1 nF; internal channel; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 03 — 20 March 2008 90 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Cmute soft mute slope FM mode; see Figure 28;

slope of soft mute attenuation

withrespectto equivalentlevel

voltage; MST[2:0] = 000

MSLE = 0; MSL[1:0] = 00 - 8 - dB/V

MSLE = 0; MSL[1:0] = 01 - 16 - dB/V

MSLE = 0; MSL[1:0] = 10 - 24 - dB/V

MSLE = 0; MSL[1:0] = 11 - 32 - dB/V

MSLE = 1; MSL[1:0] = 00 - 40 - dB/V

MSLE = 1; MSL[1:0] = 01 - 48 - dB/V

AM mode; see Figure 29;

slope of soft mute attenuation

withrespectto equivalentlevel

voltage; MST[2:0] = 011

MSLE = 0; MSL[1:0] = 00 - 8 - dB/V

MSLE = 0; MSL[1:0] = 01 - 12 - dB/V

MSLE = 0; MSL[1:0] = 10 - 16 - dB/V

MSLE = 0; MSL[1:0] = 11 - 20 - dB/V

MSLE = 1; MSL[1:0] = 00 - 24 - dB/V

MSLE = 1; MSL[1:0] = 01 - 28 - dB/V

MSLE = 1; MSL[1:0] = 10 - 32 - dB/V

MSLE = 1; MSL[1:0] = 11 - 36 - dB/V

αmute(max) maximum soft mute

attenuation by USN see Figure 30;

fMPXAMOUT = 150 kHz;

VMPXAMOUT = 0.6 V (RMS);

USS[1:0] = 11

UMD[1:0] = 00 - 3 - dB

UMD[1:0] = 01 - 6 - dB

UMD[1:0] = 10 - 9 - dB

UMD[1:0] = 11 - 12 - dB

Vstart(SNC) SNC stereo blend start

voltage seeFigure 25;equivalent level

voltage that causes channel

separation is 10 dB;

SSL[1:0] = 10

SST[3:0] = 0000 - 1.5 - V

:-:-V

SST[3:0] = 1000 - 2.0 - V

:-:-V

SST[3:0] = 1111 - 2.45 - V

Table 112. Dynamic characteristics of the sound processor

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; treble: 10 kHz ﬁlter frequency; treble = 0 dB;

bass: 60 Hz ﬁlter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

Ω

; C

= 1 nF; internal channel; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Cmute αmute

∆

Veq.LEVEL

∆

---------------------------

Product data sheet Rev. 03 — 20 March 2008 91 of 108

NXP Semiconductors TEF6904A

Integrated car radio

CSNC SNC slope see Figure 25; slope of

channel separation between

30 dB and 10 dB with respect

to level voltage;

SST[3:0] = 1010

SSL[1:0] = 00 - 38 - dB/V

SSL[1:0] = 01 - 51 - dB/V

SSL[1:0] = 10 - 63 - dB/V

SSL[1:0] = 11 - 72 - dB/V

Vstart(HCC) HCC start voltage seeFigure 26;f

audio = 10 kHz;

equivalent level voltage that

causes αHCC = 3 dB;

HSL[1:0] = 10

HST[2:0] = 000 - 1.17 - V

HST[2:0] = 001 - 1.42 - V

HST[2:0] = 010 - 1.67 - V

HST[2:0] = 011 - 1.92 - V

HST[2:0] = 100 - 2.17 - V

HST[2:0] = 101 - 2.67 - V

HST[2:0] = 110 - 3.17 - V

HST[2:0] = 111 - 3.67 - V

CHCC HCC slope see Figure 26;f

audio = 10 kHz;

HST[2:0] = 010

HSL[1:0] = 00 - 9 - dB/V

HSL[1:0] = 01 - 11 - dB/V

HSL[1:0] = 10 - 14 - dB/V

HSL[1:0] = 11 - 18 - dB/V

αHCC(max) maximum HCC

attenuation see Figure 26; faudio =10kHz

HCSF = 1 - 10 - dB

HCSF = 0 - 14 - dB

fcut cut-off frequency of ﬁxed

HCC see Figure 27;−3 dB point

(ﬁrst order ﬁlter)

HCF[2:0] = 000 - reserved - kHz

HCF[2:0] = 001 - 2 - kHz

HCF[2:0] = 010 - 3 - kHz

HCF[2:0] = 011 - 5 - kHz

HCF[2:0] = 100 - 7 - kHz

HCF[2:0] = 101 - 10 - kHz

HCF[2:0] = 110 - wide - -

HCF[2:0] = 111 - unlimited - -

Table 112. Dynamic characteristics of the sound processor

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; treble: 10 kHz ﬁlter frequency; treble = 0 dB;

bass: 60 Hz ﬁlter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

Ω

; C

= 1 nF; internal channel; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

CSNC αcs

∆

Veq.LEVEL

∆

---------------------------

CHCC α10 kHz

∆

Veq.LEVEL

∆

---------------------------

Product data sheet Rev. 03 — 20 March 2008 92 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Analog-to-digital converters for I2C-bus

Level analog-to-digital converter (8-bit); see Table 10

VLEVEL(min) lower voltage limit of

conversion range - 0.25 - V

VLEVEL(max) upper voltage limit of

conversion range - 4.25 - V

∆VLEVEL bit resolution voltage - 15.7 - mV

Ultrasonic noise analog-to-digital converter (4-bit); see Figure 24

∆fUSN(min) conversion range lower

deviation limit fMPXAMOUT = 150 kHz - 0 - kHz

∆fUSN(max) conversion range upper

deviation limit fMPXAMOUT = 150 kHz - 100 - kHz

∆fUSN bit resolution - 6.25 - kHz

Wideband AM analog-to-digital converter (4-bit); see Figure 24

VWAM(min)(p-p) lower voltage limit of

conversion range

(peak-to-peak value)

fLEVEL = 21 kHz - 0 - mV

VWAM(max)(p-p) upper voltage limit of

conversion range

(peak-to-peak value)

fLEVEL = 21 kHz - 800 - mV

∆VWAM(p-p) bit resolution voltage

(peak-to-peak value) - 53.3 - mV

Tone/volume control

Ziinput impedance measured unbalanced;

pins INAL, INAR, INAC, INAD,

INBL, INBR, INC and IND

110 160 - kΩ

pins INPL and INPR 110 160 - kΩ

Zooutput impedance pins LFOUT, RFOUT, LROUT

and RROUT - - 100 Ω

pins PLOUT and PROUT - - 100 Ω

Gs(main) signal gain from pins

INAL, INAR, INAC, INAD,

INBL, INBR, INC and

IND to LFOUT, RFOUT,

LROUT and RROUT

−1 - +1 dB

Gs(ext)i signal gain external input EXP1 = 1; from pins INPL and

INPR to LFOUT, RFOUT,

LROUT and RROUT

23 4dB

EXP1 = 0; EXP0 = 1;

from pins INPL and INPR via

tone/volume part to LFOUT,

RFOUT, LROUT and RROUT

56 7dB

Table 112. Dynamic characteristics of the sound processor

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; treble: 10 kHz ﬁlter frequency; treble = 0 dB;

bass: 60 Hz ﬁlter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

Ω

; C

= 1 nF; internal channel; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 03 — 20 March 2008 93 of 108

NXP Semiconductors TEF6904A

Integrated car radio

Gs(ext)o signal gain to external

output see Figure 37; from

pins INAL, INAR, INAC, INAD,

INBL, INBR, INC and IND to

PLOUT and PROUT

via tone/volume part;

EXPS = 0 −4−3−2dB

EXPS = 1 −7−6−5dB

Vi(max) maximum input voltage THD = 0.2 %; Gvol =−6 dB;

pins INAL, INAR, INAC, INAD,

INBL, INBR, INC and IND

2- - V

Vi(ext)(max) maximum input voltage

at external processor

inputs

THD = 0.2 %; pins INPL and

INPR

EXP1 = 1 1 - - V

EXP1 = 0; EXP0 = 1;

Gvol ≤−3dB 1- - V

Vo(max) maximum output voltage Gvol =+6dB

THD = 0.2 % 1.4 1.8 - V

THD = 1 %; RL=5kΩ;

CL=10nF 1.4 1.8 - V

Gvol =+3dB;

OUTA = 1 (+3 dB)

THD = 0.2 % 2 2.2 - V

THD = 0.2 %; VCC = 8.0 V 1.6 1.8 - V

RL=5kΩ; CL=10nF;

THD = 1 % 2 2.25 - V

RL=5kΩ; CL=10nF;

THD = 1 %; VCC = 8.0 V 1.7 1.9 - V

fmax frequency response

(pins INAL, INAR, INAC,

INAD, INBL, INBR, INC

and IND)

upper −1 dB point; referenced

to 1 kHz 20 - - kHz

αASI attenuation during ASI f = 20 kHz referenced to 1 kHz - 0.15 1 dB

CMRR common mode rejection

ratio Gvol = 0 dB; line input

capacitance Ci=1µF

faudio = 1 kHz on common

mode inputs -60-dB

faudio = 20 Hz to 20 kHz on

common mode inputs 40 - - dB

Table 112. Dynamic characteristics of the sound processor

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; treble: 10 kHz ﬁlter frequency; treble = 0 dB;

bass: 60 Hz ﬁlter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

Ω

; C

= 1 nF; internal channel; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 03 — 20 March 2008 94 of 108

NXP Semiconductors TEF6904A

Integrated car radio

THD total harmonic distortion conﬁgured as non-inverting,

single-ended inputs

faudio = 20 Hz to 10 kHz;

Vi= 1 V (RMS) - 0.02 0.1 %

faudio = 20 Hz to 10 kHz;

Vi= 2 V (RMS);

Gvol =−10 dB

- 0.03 0.2 %

faudio =25Hz;

Vi= 500 mV (RMS);

Gbass = +8 dB; Gvol =0dB

- 0.025 0.2 %

faudio = 4 kHz;

Vi= 500 mV (RMS);

Gtreble = +8 dB; Gvol =0dB

- 0.02 0.2 %

αcs channel separation faudio =20Hzto20kHz 60 75 - dB

αSinput isolation of one

selected source to any

other input

source impedance of unused

input: 600 Ω

faudio =20Hzto10kHz 75 90 - dB

faudio = 20 kHz 70 - - dB

Vnoise(rms) noise voltage

(RMS value) ITU-R ARM-weighted and

20 kHz ‘brick wall’ without

input signal (source

impedance 600 Ω);

unbalanced

Gvol = 0 dB - 12 20 µV

Gbass =+6dB;

Gtreble = +6 dB; Gvol =0dB -2435µV

Gvol = +20 dB - 71 100 µV

Gvol = +20 dB; balanced - 100 140 µV

Gvol =−10 dB - 10 18 µV

Gvol =−40 dB - 9.5 13.5 µV

outputs muted - 5 12 µV

using‘A-weighting’ﬁlter and

20 kHz ‘brick wall’;

Gvol =−20 dB; start of

loudness = −12 dB

- 6.8 10 µV

Voffset(max) maximum DC offset between any two settings

(non-consecutive) on any one

audio control

-7-mV

between any two settings

(non-consecutive) on volume

control; Gvol ≤ +6 dB

-7-mV

between any two settings

(non-consecutive) on input

gain control; Ging ≤ +6 dB

-7-mV

Table 112. Dynamic characteristics of the sound processor

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; treble: 10 kHz ﬁlter frequency; treble = 0 dB;

bass: 60 Hz ﬁlter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

Ω

; C

= 1 nF; internal channel; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 03 — 20 March 2008 95 of 108

NXP Semiconductors TEF6904A

Integrated car radio

PSRR power supply ripple

rejection VCC(AC) =V

ripple = 200 mV

(RMS); Gvol =0dB

fripple = 20 Hz to 100 Hz 35 65 - dB

fripple = 100 Hz to 1 kHz 50 70 - dB

fripple = 1 kHz to 20 kHz 30 50 - dB

fripple = 500 Hz - 70 - dB

αct crosstalk between bus

inputs and signal outputs fclk = 100 kHz [2] - 110 - dB

tddelay time from VCC

applied to ﬁnal

DC voltage at outputs

-12-ms

Input gain

Ging input gain control see Table 76

maximum setting [3] -18-dB

minimum setting [3] -−10 - dB

Gstep(vol) step resolution - 2 - dB

Volume

Gvol volume/balance gain

control see Table 83

maximum setting [3] -20-dB

minimum setting [3] -−75 - dB

mute attenuation;

20 Hz to 20 kHz -−90 −80 dB

Gstep(vol) step resolution - 1 - dB

|∆Gset|gain set error Gvol = +20 dB to −35 dB - 0.25 1 dB

Gvol =−36 dB to −75 dB - 0.55 3 dB

∆Gstep(vol) gain step error - - 1 dB

|∆Gtrack|gain tracking error

between left and right Gvol = +20 dB to −35 dB - 0.1 1 dB

Gvol =−36 dB to −75 dB - 0.3 3 dB

Loudness; see Table 101 and Figure 38

Gbass loudness bass control

range [4] -20-dB

Gtreble loudness treble control

range -4-dB

Gstep loudness step resolution - 2 - dB

Table 112. Dynamic characteristics of the sound processor

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; treble: 10 kHz ﬁlter frequency; treble = 0 dB;

bass: 60 Hz ﬁlter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

Ω

; C

= 1 nF; internal channel; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 03 — 20 March 2008 96 of 108

NXP Semiconductors TEF6904A

Integrated car radio

[1] The equivalent level voltage is that value of the level voltage (on pin LEVEL) which results in the same weak signal control effect (for

instance HCC roll-off) as the output value of the speciﬁed detector (USN, WAM and multipath).

Treble

ftreble treble control ﬁlter

frequency see Figure 35;−3dB

frequency of maximum treble

setting referenced to 100 kHz

TRF[1:0] = 00 - 8 - kHz

TRF[1:0] = 01 - 10 - kHz

TRF[1:0] = 10 - 12 - kHz

TRF[1:0] = 11 - 15 - kHz

Gtreble treble gain control TRE[2:0] = 111; TREM = 1 - 14 - dB

TRE[2:0] = 111; TREM = 0 - −14 - dB

Gstep(treble) step resolution gain - 2 - dB

∆Gstep(treble) treble step error - - 0.5 dB

Bass

fbass bass control ﬁlter

frequency at maximum

gain

see Figure 38

BAF[1:0] = 00 - 60 - Hz

BAF[1:0] = 01 - 80 - Hz

BAF[1:0] = 10 - 100 - Hz

BAF[1:0] = 11 - 120 - Hz

Gbass bass gain control BAS[3:0] = 0111; BASM = 1 - 14 - dB

BAS[3:0] = 0111; BASM = 0 - −14 - dB

Gstep(bass) step resolution gain - 2 - dB

∆Gstep(bass) bass step error - - 0.5 dB

EQbow equalizer bowing faudio = 1 kHz;

Vi= 500 mV (RMS);

Gbass = +12 dB; fbass =60Hz;

Gtreble = +12 dB;

fcut(treble) =15kHz

- 1.8 - dB

Fader

Gfader fader gain control see Table 91

maximum setting - 0 - dB

minimum setting - −64 - dB

output mute - - −80 dB

Gstep(fader) step resolution gain - 1 - dB

∆Gstep(fader) fader step error - - 1 dB

αmute audio mute volume control: mute and

output muted (bits MULF,

MURF, MULR and MURR)

80 90 - dB

Table 112. Dynamic characteristics of the sound processor

…continued

= 8.5 V; T

amb

=25

C; see Figure 42; all AC values are given in RMS; treble: 10 kHz ﬁlter frequency; treble = 0 dB;

bass: 60 Hz ﬁlter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

Ω

; C

= 1 nF; internal channel; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 03 — 20 March 2008 97 of 108

NXP Semiconductors TEF6904A

Integrated car radio

[2] Crosstalk between bus inputs and signal outputs:

[3] The input gain setting ING and the volume setting VOL deﬁne the overall volume. The overall range is limited to −83 dB to +28 dB. For

values > +28 dB the actual value is +28 dB. For overall values < −83 dB the actual value is mute.

[4] The maximum bass gain including BASS setting is +20 dB.

13. I2C-bus characteristics

The maximum I2C-bus communication speed is 400 kbit/s. SDA and SCL HIGH and LOW

internal thresholds are speciﬁed according to an I2C-bus voltage range from 2.5 V to 3.3 V

including I2C-bus voltage tolerances of 10 %. The bus interface tolerates also SDA and

SCL signals from a 5 V bus. Restrictions for VIL in a 5 V application can be derived from

Table 113.

[1] Minimum value of tof; Cb = total capacitance of one I2C-bus line [pF].

[2] Typical value of tof; the output fall time tof [ns] depends on the total load capacitance Cb [pF] and the I2C-bus voltage VDD [V]:

tof =1⁄12 ×VDD × Cb.

αct 20logVbus(p-p)

Vo(rms)

--------------------

Table 113. I2C-bus parameters

Symbol Parameter Conditions Min Typ Max Unit

VIL LOW-level input voltage - - 1.09 V

VIH HIGH-level input voltage 1.56 - - V

CSDA capacitance of SDA pin - 4 6 pF

CSCL capacitance of SCL pin - 3 5 pF

tDOR(HL) data output reaction time

(acknowledge and read

data) HIGH-to-LOW

VDD = 5 V; I = 3 mA;

Cb= 400 pF;

see Figure 40

- 700 863 ns

VDD = 3.3 V;

Rp= 1.8 kΩ;

Cb= 400 pF;

see Figure 40

- 570 668 ns

VDD = 2.5V; Rp=35kΩ;

Cb=10pF;

see Figure 40

- 520 593 ns

tDOR(LH) data output reaction time

(read data) LOW-to-HIGH see Figure 40 - 450 488 ns

tof output fall time Cb= 10 pF to 120 pF;

see Figure 41 [1] 20 + 0.1Cb10 × VDD -ns

Cb≥ 120 pF;

see Figure 41 [1][2] 20 + 0.1Cb- 250 ns

Product data sheet Rev. 03 — 20 March 2008 98 of 108

NXP Semiconductors TEF6904A

Integrated car radio

a. Data change from LOW to HIGH. b. Data change from HIGH to LOW.

Fig 40. Data output reaction time of the IC

001aac124

SDA

SCL VIL(max)

tDOR(LH)

001aab802

VIL(max)

0.7VDD

tDOR(HL)

Fig 41. Deﬁnition of the fall time of the output signal

001aab803

VDD

0.7VDD

0.3VDD

tof

Product data sheet Rev. 03 — 20 March 2008 99 of 108

NXP Semiconductors TEF6904A

Integrated car radio

14. Overall system parameters

Table 114. Overall system parameters

Symbol Parameter Conditions Min Typ Max Unit

Supply current in FM mode

ICC total supply current

inclusive IV60

- 102 - mA

Supply current in AM mode

ICC total supply current

inclusive IV60

-89- mA

AM overall system parameters

ftune AM tuning frequency LW 144 - 288 kHz

MW 522 - 1710 kHz

SW 2.3 - 26.1 MHz

Vsens sensitivity voltage fRF = 990 kHz; m = 0.3;

fmod = 1 kHz;

BAF = 2.15 kHz;

(S+N)/N = 26 dB;

dummy aerial

15 pF/60 pF

-50- µV

S/N ultimate signal-to-noise

ratio 54 58 - dB

THD total harmonic

distortion 200 µV < VRF < 1 V;

m = 0.8; fAF = 400 Hz - 0.4 1 %

IP3 3rd-order intercept

point ∆f = 40 kHz - 130 - dBµV

FM overall system parameters

ftune FM tuning frequency 65 - 108 MHz

Vsens sensitivity voltage (RF

input voltage at

(S+N)/N = 26 dB)

∆f = 22.5 kHz;

fmod = 1 kHz;

DEMP = 1; B = 300 Hz

to 22 kHz; measured

with 75 Ω dummy

antenna and test circuit

-2- µV

(S+N)/N maximum signal plus

noise-to-noise ratio of

MPXAM output voltage

Vi= 3 mV;

∆f = 22.5 kHz;

fmod = 1 kHz;

DEMP = 1; B = 300 Hz

to 22 kHz; measured

with 75 Ω dummy

antenna and test circuit

-60- dB

THD total harmonic

distortion ∆f = 75 kHz - 0.5 1 %

IP3 3rd-order intercept

point ∆f = 400 kHz - 120 - dBµV

xxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx x xxxxxxxxxxxxxx xxxxxxxxxx xxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx

xxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxx

xxxxxxxxxxxxxxxx xxxxxxxxxxxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxx x x

Product data sheet Rev. 03 — 20 March 2008 100 of 108

NXP Semiconductors TEF6904A

Integrated car radio

15. Application information

Fig 42. Application diagram of TEF6904AH

reset

hold

fast

readhold

008aaa017

10 to 13

17 18 2019 21 22 23 25 27 28 29 34 35 36 37 38 39 40

555653

from/to EXP SEL. 1, 2

100 nF

6566676869707172, 73, 7475766263

30, 31, 32, 3324

iAM

iFM

SDA

SCL

I2C-bus

RROUT

LROUT

RFOUT

LFOUT

INPR

100 nF

kΩ

100 nF

INPLPROUTPLOUT

TEF6904AH

STEREO

DECODER

AM NOISE

DETECTOR

FM NOISE

DETECTOR

NOISE

BLANKER HIGH

CUT

SNC

MULTIPATH,

LEVEL,

ADJACENT CHANNEL,

MODULATION AND

OFFSET

DETECTION

WEAK SIGNAL AND

FM BANDWIDTH

CONTROL LOGIC

HCC

EXP

SEL. 1

INPUT

SELECT

DE-EMPHASIS

50 µs/75 µs

INPUT GAIN,

VOLUME,

BALANCE,

MUTE

LOUDNESS,

BASS,

TREBLE

I2C-BUS

TUNING

STATE

MACHINE

DEMODULATOR

AM IF NOISE

DETECTOR

FM/AM

RF AGC CASCODE

CONTROL

IF COUNT

AUDIO STEP INTERPOLATION

EXP

SEL. 2 F/R

FADER

DIV

fREF

PLL

÷N BAND

÷M

÷2

LO2 90°

soft mute

tuning

mute

ana

swap

snc hcc

LO1 90°

ifbw

90°

antenna DAA

VPVPVP

LEVEL

USN

MOD

WAM

OFFS

mix1

2.2 pF

20.5 MHz LINE INPUTS

L+R+L−R−L+L−R+

LR L

M−M+

RLR

LR LR

R−

kΩ

R2R1

47 Ω

1 µF

47 µF

100 nF

1 nF

270 pF

100 nF

10 kΩ

2.2 kΩ

4.7

kΩ

3.9

100 nF

22 nF

1 nF

kΩ

6.8 pF

8.2 pF

100 pF

6.8 pF

1 µF

15 µH

1 mH

27 pF

220

560 Ω

Ω

47 pF

220

nF 100

100

100 nF 1 µF22

SFE10.7MS3 SFP450H

6.8 µH

470 kΩ

1 nF 1 nF

10 nF

BAV99

BC848C

100

3.3

1 nF

1.2 kΩ

22 kΩ

BB208 L1

BAP64-04

vcc

gnd

vref

pll

i.c.

vcm

vco

vtc

n.c.

rf rf i.c. dc if1

220 pF

1.5 MΩ

100

BF862

82 Ω

560 Ω

BAP70AM

100 nF

dig2

dig1

i.c.

MIXER

LO2 90°

MIXER

LO2

LO1

MIXER

LO1 90°

BB207

90°

Product data sheet Rev. 03 — 20 March 2008 101 of 108

NXP Semiconductors TEF6904A

Integrated car radio

[1] All low value capacitors (≤1 nF) must be of NP0 type for guaranteed high frequency performance.

[2] The capacitor is used to achieve a crystal frequency of 20.5 MHz together with the crystal type LN-G102-587.

Table 115. List of components[1]

Symbol Component Type Manufacturer

C1 capacitor for frequency pulling 2.2 pF[2] -

C2 capacitor for VCO tuning 270 pF -

C3 decoupling capacitor for VCO tuning 100 nF -

R1 resistor for supply V60 47 Ω; 0.2 W -

L1 oscillator coil E543SNAS-02010 TOKO

L2 FM RF selectivity coil C6342A-R11 SAGAMI

L3 10.7 MHz IF transformer PF670CCS-A065DX TOKO

L4 450 kHz IF transformer P7PSGAE-A021YBY=S TOKO

X1 crystal 20.5 MHz LN-G102-587 NDK

D1 VCO varactor diode BB208 NXP Semiconductors

D2 RF selectivity varactor diode BB207 NXP Semiconductors

D3 FM PIN diode BAP64-04 NXP Semiconductors

D4 AM PIN diode BAP70AM NXP Semiconductors

D5 ElectroStatic Discharge (ESD) protection diode BAV99 NXP Semiconductors

T1 AM Low Noise Ampliﬁer (LNA) JFET transistor BF862 NXP Semiconductors

T2 AM LNA cascode transistor BC847C NXP Semiconductors

F1 10.7 MHz ceramic ﬁlter SFELA10M7HAA0-B0 muRata

F2 450 kHz ceramic ﬁlter CFWLA450KGFA-B0 muRata

Product data sheet Rev. 03 — 20 March 2008 102 of 108

NXP Semiconductors TEF6904A

Integrated car radio

16. Package outline

Fig 43. Package outline SOT496-1 (QFP80)

UNIT A1A2A3bpceLL

pywv θ

REFERENCES

OUTLINE

VERSION EUROPEAN

PROJECTION ISSUE DATE

IEC JEDEC JEITA

mm 0.25

0.10 2.75

2.55 0.25 0.23

0.13 14.1

13.9 0.65 17.45

16.95 1.00

0.65 7

0.12 0.10.21.6

DIMENSIONS (mm are the original dimensions)

Note

1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.

1.03

0.73

SOT496-1 135E06 MS-022 ED-7311EE 98-07-01

02-10-04

D(1) E(1)

14.1

13.9

HDHEZD(1) ZE(1)

17.45

16.95 1.00

0.65

vMB

vMA

6160 4140

0.38

0.22

pin 1 index

0 5 10 mm

scale

QFP80: plastic quad flat package; 80 leads (lead length 1.6 mm); body 14 x 14 x 2.7 mm SOT496-1

max.

detail X

(A )

Product data sheet Rev. 03 — 20 March 2008 103 of 108

NXP Semiconductors TEF6904A

Integrated car radio

17. Soldering

This text provides a very brief insight into a complex technology. A more in-depth account

of soldering ICs can be found in Application Note

AN10365 “Surface mount reﬂow

soldering description”

17.1 Introduction to soldering

Soldering is one of the most common methods through which packages are attached to

Printed Circuit Boards (PCBs), to form electrical circuits. The soldered joint provides both

the mechanical and the electrical connection. There is no single soldering method that is

ideal for all IC packages. Wave soldering is often preferred when through-hole and

Surface Mount Devices (SMDs) are mixed on one printed wiring board; however, it is not

suitable for ﬁne pitch SMDs. Reﬂow soldering is ideal for the small pitches and high

densities that come with increased miniaturization.

17.2 Wave and reﬂow soldering

Wave soldering is a joining technology in which the joints are made by solder coming from

a standing wave of liquid solder. The wave soldering process is suitable for the following:

•Through-hole components

•Leaded or leadless SMDs, which are glued to the surface of the printed circuit board

Not all SMDs can be wave soldered. Packages with solder balls, and some leadless

packages which have solder lands underneath the body, cannot be wave soldered. Also,

leaded SMDs with leads having a pitch smaller than ~0.6 mm cannot be wave soldered,

due to an increased probability of bridging.

The reﬂow soldering process involves applying solder paste to a board, followed by

component placement and exposure to a temperature proﬁle. Leaded packages,

packages with solder balls, and leadless packages are all reﬂow solderable.

Key characteristics in both wave and reﬂow soldering are:

•Board speciﬁcations, including the board ﬁnish, solder masks and vias

•Package footprints, including solder thieves and orientation

•The moisture sensitivity level of the packages

•Package placement

•Inspection and repair

•Lead-free soldering versus PbSn soldering

17.3 Wave soldering

Key characteristics in wave soldering are:

•Process issues, such as application of adhesive and ﬂux, clinching of leads, board

transport, the solder wave parameters, and the time during which components are

exposed to the wave

•Solder bath speciﬁcations, including temperature and impurities

Product data sheet Rev. 03 — 20 March 2008 104 of 108

NXP Semiconductors TEF6904A

Integrated car radio

17.4 Reﬂow soldering

Key characteristics in reﬂow soldering are:

•Lead-free versus SnPb soldering; note that a lead-free reﬂow process usually leads to

higher minimum peak temperatures (see Figure 44) than a PbSn process, thus

reducing the process window

•Solder paste printing issues including smearing, release, and adjusting the process

window for a mix of large and small components on one board

•Reﬂow temperature proﬁle; this proﬁle includes preheat, reﬂow (in which the board is

heated to the peak temperature) and cooling down. It is imperative that the peak

temperature is high enough for the solder to make reliable solder joints (a solder paste

characteristic). In addition, the peak temperature must be low enough that the

packages and/or boards are not damaged. The peak temperature of the package

depends on package thickness and volume and is classiﬁed in accordance with

Table 116 and 117

Moisture sensitivity precautions, as indicated on the packing, must be respected at all

times.

Studies have shown that small packages reach higher temperatures during reﬂow

soldering, see Figure 44.

Table 116. SnPb eutectic process (from J-STD-020C)

Package thickness (mm) Package reﬂow temperature (°C)

Volume (mm3)

< 350 ≥ 350

< 2.5 235 220

≥ 2.5 220 220

Table 117. Lead-free process (from J-STD-020C)

Package thickness (mm) Package reﬂow temperature (°C)

Volume (mm3)

< 350 350 to 2000 > 2000

< 1.6 260 260 260

1.6 to 2.5 260 250 245

> 2.5 250 245 245

Product data sheet Rev. 03 — 20 March 2008 105 of 108

NXP Semiconductors TEF6904A

Integrated car radio

For further information on temperature proﬁles, refer to Application Note

AN10365

“Surface mount reﬂow soldering description”

18. Revision history

MSL: Moisture Sensitivity Level

Fig 44. Temperature proﬁles for large and small components

001aac844

temperature

time

minimum peak temperature

= minimum soldering temperature

maximum peak temperature

= MSL limit, damage level

peak

temperature

Table 118. Revision history

Document ID Release date Data sheet status Change notice Supersedes

TEF6904A_3 20080320 Product data sheet PCN20071211003 TEF6904A_2

Modiﬁcations: •The format of this data sheet has been redesigned to comply with the new identity guidelines of

NXP Semiconductors.

•Legal texts have been adapted to the new company name where appropriate.

•Table 107: test mode description corrected

TEF6904A_2 20060711 Product data sheet - TEF6904A_1

Modiﬁcations: •Table 22: added row 1Fh

•Section 8.2.27: changed 1Fh to 1Eh in table titles

•Section 8.2.28: added

•Table 111: AM demodulator output pin MPXAMOUT speciﬁcation: changed values of Vo

•Table 112: stereo decoder and AM path speciﬁcation: changed value of Vo(AM)

TEF6904A_1 20060203 Preliminary data sheet - -

Product data sheet Rev. 03 — 20 March 2008 106 of 108

NXP Semiconductors TEF6904A

Integrated car radio

19. Legal information

19.1 Data sheet status

[1] Please consult the most recently issued document before initiating or completing a design.

[2] The term ‘short data sheet’ is explained in section “Deﬁnitions”.

[3] The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status

information is available on the Internet at URL http://www.nxp.com.

19.2 Deﬁnitions

Draft — The document is a draft version only. The content is still under

internal review and subject to formal approval, which may result in

modiﬁcations or additions. NXP Semiconductors does not give any

representations or warranties as to the accuracy or completeness of

information included herein and shall have no liability for the consequences of

use of such information.

Short data sheet — A short data sheet is an extract from a full data sheet

with the same product type number(s) and title. A short data sheet is intended

for quick reference only and should not be relied upon to contain detailed and

full information. For detailed and full information see the relevant full data

sheet, which is available on request via the local NXP Semiconductors sales

ofﬁce. In case of any inconsistency or conﬂict with the short data sheet, the

full data sheet shall prevail.

19.3 Disclaimers

General — Information in this document is believed to be accurate and

reliable. However, NXP Semiconductors does not give any representations or

warranties, expressed or implied, as to the accuracy or completeness of such

information and shall have no liability for the consequences of use of such

information.

Right to make changes — NXP Semiconductors reserves the right to make

changes to information published in this document, including without

limitation speciﬁcations and product descriptions, at any time and without

notice. This document supersedes and replaces all information supplied prior

to the publication hereof.

Suitability for use — NXP Semiconductors products are not designed,

authorized or warranted to be suitable for use in medical, military, aircraft,

space or life support equipment, nor in applications where failure or

malfunction of an NXP Semiconductors product can reasonably be expected

to result in personal injury, death or severe property or environmental

damage. NXP Semiconductors accepts no liability for inclusion and/or use of

NXP Semiconductors products in such equipment or applications and

therefore such inclusion and/or use is at the customer’s own risk.

Applications — Applications that are described herein for any of these

products are for illustrative purposes only. NXP Semiconductors makes no

representation or warranty that such applications will be suitable for the

speciﬁed use without further testing or modiﬁcation.

Limiting values — Stress above one or more limiting values (as deﬁned in

the Absolute Maximum Ratings System of IEC 60134) may cause permanent

damage to the device. Limiting values are stress ratings only and operation of

the device at these or any other conditions above those given in the

Characteristics sections of this document is not implied. Exposure to limiting

values for extended periods may affect device reliability.

Terms and conditions of sale — NXP Semiconductors products are sold

subject to the general terms and conditions of commercial sale, as published

at http://www.nxp.com/proﬁle/terms, including those pertaining to warranty,

intellectual property rights infringement and limitation of liability, unless

explicitly otherwise agreed to in writing by NXP Semiconductors. In case of

any inconsistency or conﬂict between information in this document and such

terms and conditions, the latter will prevail.

No offer to sell or license — Nothing in this document may be interpreted

or construed as an offer to sell products that is open for acceptance or the

grant, conveyance or implication of any license under any copyrights, patents

or other industrial or intellectual property rights.

Quick reference data — The Quick reference data is an extract of the

product data given in the Limiting values and Characteristics sections of this

document, and as such is not complete, exhaustive or legally binding.

19.4 Trademarks

Notice: All referenced brands, product names, service names and trademarks

are the property of their respective owners.

I2C-bus — logo is a trademark of NXP B.V.

20. Contact information

For additional information, please visit: http://www.nxp.com

For sales ofﬁce addresses, send an email to: salesaddresses@nxp.com

Document status[1][2] Product status[3] Deﬁnition

Objective [short] data sheet Development This document contains data from the objective speciﬁcation for product development.

Preliminary [short] data sheet Qualiﬁcation This document contains data from the preliminary speciﬁcation.

Product [short] data sheet Production This document contains the product speciﬁcation.

Product data sheet Rev. 03 — 20 March 2008 107 of 108

continued >>

NXP Semiconductors TEF6904A

Integrated car radio

21. Contents

1 General description. . . . . . . . . . . . . . . . . . . . . . 1

2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

3 Quick reference data . . . . . . . . . . . . . . . . . . . . . 2

4 Ordering information. . . . . . . . . . . . . . . . . . . . . 3

5 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4

6 Pinning information. . . . . . . . . . . . . . . . . . . . . . 5

6.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

6.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5

7 Functional description . . . . . . . . . . . . . . . . . . . 7

7.1 FM mixer 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

7.2 FM RF AGC . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

7.3 FM mixer 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

7.4 FM IF2 channel ﬁlter. . . . . . . . . . . . . . . . . . . . . 8

7.5 FM limiter and level detection. . . . . . . . . . . . . . 8

7.6 FM demodulator . . . . . . . . . . . . . . . . . . . . . . . . 8

7.7 Center frequency and bandwidth tuning and

center frequency DAA. . . . . . . . . . . . . . . . . . . . 8

7.8 Bandwidth control algorithm . . . . . . . . . . . . . . . 8

7.9 VCO and dividers . . . . . . . . . . . . . . . . . . . . . . . 9

7.10 Crystal oscillator. . . . . . . . . . . . . . . . . . . . . . . . 9

7.11 Tuning PLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

7.12 Antenna DAA . . . . . . . . . . . . . . . . . . . . . . . . . . 9

7.13 AM RF AGC control . . . . . . . . . . . . . . . . . . . . . 9

7.14 AM mixer 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

7.15 AM IF noise blanker . . . . . . . . . . . . . . . . . . . . 10

7.16 AM IF AGC ampliﬁer and demodulator. . . . . . 10

7.17 AM level detection. . . . . . . . . . . . . . . . . . . . . . 10

7.18 AM and FM level DAA. . . . . . . . . . . . . . . . . . . 10

7.19 AM and FM IF counter . . . . . . . . . . . . . . . . . . 10

7.20 Tuning mute . . . . . . . . . . . . . . . . . . . . . . . . . . 10

7.21 FM stereo decoder . . . . . . . . . . . . . . . . . . . . . 10

7.22 FM and AM AF noise blanker . . . . . . . . . . . . . 11

7.23 Fixed high cut and high cut control. . . . . . . . . 11

7.24 De-emphasis. . . . . . . . . . . . . . . . . . . . . . . . . . 11

7.25 Weak signal processing . . . . . . . . . . . . . . . . . 11

7.26 Audio step interpolation . . . . . . . . . . . . . . . . . 11

7.27 Source selector. . . . . . . . . . . . . . . . . . . . . . . . 11

7.28 VU-meter read . . . . . . . . . . . . . . . . . . . . . . . . 12

7.29 Volume and balance . . . . . . . . . . . . . . . . . . . . 12

7.30 CD compression. . . . . . . . . . . . . . . . . . . . . . . 12

7.31 Bass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.32 Treble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.33 Loudness . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.34 Fader. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7.35 External processor I/O . . . . . . . . . . . . . . . . . . 13

2C-bus protocol. . . . . . . . . . . . . . . . . . . . . . . . 13

8.1 Read mode. . . . . . . . . . . . . . . . . . . . . . . . . . . 14

8.1.1 Read mode: data byte IFCOUNTER . . . . . . . 14

8.1.2 Read mode: data byte LEVEL . . . . . . . . . . . . 17

8.1.3 Read mode: data byte USN/WAM . . . . . . . . . 18

8.1.4 Read mode: data byte MOD . . . . . . . . . . . . . 18

8.1.5 Read mode: data byte IFBW . . . . . . . . . . . . . 20

8.1.6 Read mode: data byte ID . . . . . . . . . . . . . . . . 20

8.1.7 Read mode: data byte TEMP. . . . . . . . . . . . . 21

8.2 Write mode. . . . . . . . . . . . . . . . . . . . . . . . . . . 21

8.2.1 Mode and subaddress byte for write . . . . . . . 27

8.2.2 Write mode: data byte BANDWIDTH . . . . . . . 34

8.2.3 Write mode: data bytes PLLM and PLLL . . . . 36

8.2.4 Write mode: data byte DAA . . . . . . . . . . . . . . 36

8.2.5 Write mode: data byte AGC . . . . . . . . . . . . . . 37

8.2.6 Write mode: data byte BAND. . . . . . . . . . . . . 38

8.2.7 Tuning overview . . . . . . . . . . . . . . . . . . . . . . . 39

8.2.8 Write mode: data byte LEVELALGN . . . . . . . 40

8.2.9 Write mode: data byte IFCF. . . . . . . . . . . . . . 40

8.2.10 Write mode: data byte IFCAP . . . . . . . . . . . . 41

8.2.10.1 Factory alignment of bits IFCAP[3:0] . . . . . . . 41

8.2.10.2 Initialization of the radio . . . . . . . . . . . . . . . . . 41

8.2.10.3 Factory alignment of IFCF . . . . . . . . . . . . . . . 41

8.2.11 Write mode: data byte ACD . . . . . . . . . . . . . . 42

8.2.12 Write mode: data byte SENSE. . . . . . . . . . . . 43

8.2.13 Write mode: data byte TIMING . . . . . . . . . . . 44

8.2.14 Write mode: data byte SNC . . . . . . . . . . . . . . 46

8.2.15 Write mode: data byte HIGHCUT. . . . . . . . . . 47

8.2.16 Write mode: data byte SOFTMUTE . . . . . . . . 50

8.2.17 Write mode: data byte RADIO . . . . . . . . . . . . 54

8.2.18 Write mode: data byte INPUT . . . . . . . . . . . . 55

8.2.19 Write mode: data byte VOLUME . . . . . . . . . . 57

8.2.20 Write mode: data byte TREBLE. . . . . . . . . . . 64

8.2.21 Write mode: data byte BASS . . . . . . . . . . . . . 65

8.2.22 Write mode: data byte FADER. . . . . . . . . . . . 67

8.2.23 Write mode: data byte OUTPUT . . . . . . . . . . 68

8.2.24 Write mode: data byte BALANCE . . . . . . . . . 69

8.2.25 Write mode: data byte LOUDNESS . . . . . . . . 70

8.2.26 Write mode: data byte POWER . . . . . . . . . . . 72

8.2.27 Write mode: data bytes RESERVED . . . . . . . 72

8.2.28 Write mode: data bytes TEST . . . . . . . . . . . . 73

9 Limiting values . . . . . . . . . . . . . . . . . . . . . . . . 73

10 Thermal characteristics . . . . . . . . . . . . . . . . . 74

11 Static characteristics . . . . . . . . . . . . . . . . . . . 74

12 Dynamic characteristics. . . . . . . . . . . . . . . . . 76

12.1 Dynamic characteristics of the tuner . . . . . . . 76

12.2 Dynamic characteristics of the sound

processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

NXP Semiconductors TEF6904A

Integrated car radio

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

Date of release: 20 March 2008

Document identifier: TEF6904A_3

Please be aware that important notices concerning this document and the product(s)

described herein, have been included in section ‘Legal information’.

13 I2C-bus characteristics . . . . . . . . . . . . . . . . . . 97

14 Overall system parameters. . . . . . . . . . . . . . . 99

15 Application information. . . . . . . . . . . . . . . . . 100

16 Package outline . . . . . . . . . . . . . . . . . . . . . . . 102

17 Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

17.1 Introduction to soldering . . . . . . . . . . . . . . . . 103

17.2 Wave and reﬂow soldering . . . . . . . . . . . . . . 103

17.3 Wave soldering. . . . . . . . . . . . . . . . . . . . . . . 103

17.4 Reﬂow soldering. . . . . . . . . . . . . . . . . . . . . . 104

18 Revision history. . . . . . . . . . . . . . . . . . . . . . . 105

19 Legal information. . . . . . . . . . . . . . . . . . . . . . 106

19.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . 106

19.2 Deﬁnitions. . . . . . . . . . . . . . . . . . . . . . . . . . . 106

19.3 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . 106

19.4 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . 106

20 Contact information. . . . . . . . . . . . . . . . . . . . 106

21 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107