TDA8296HN/C1,551 - NXP SEMICONDUCTORS

1. General description

The TDA8296 is an alignment-free digital multistandard vision and sound low IF signal

PLL demodulator for positive and negative video modulation including AM and FM mono

sound processing. It can be used in all countries worldwide for M/N, B/G/H, I, D/K,

L and L-accent standard. CVBS and SSIF/mono audio are provided via two DACs. FM

radio preprocessing is included for simple interfacing with demodulator/stereo decoder

backends.

The IC is especially suited for the application with the NXP Silicon Tuner TDA1827x.

All the processing is done in the digital domain.

The chip has an ‘easy programming’ mode to make the I2C-bus protocol very simple. In

principle, only one bit sets the proper standard with recommended content. However, if

this is not suitable, free programming is always possible.

Note: Register 06h has to be reprogrammed to new value C4h (see Section 9.2 and

Section 9.3.1).

2. Features and benefits

Digital IF demodulation for all analog TV standards worldwide (M/N, B/G/H, D/K, I,

L and L-accent standard)

Multista ndard true synchronous demodulation with active carrier regeneration

Alignment-free

16 MHz typical reference frequency input (from low IF tuner) or operating as cryst al

oscillator

Internal PLL synthesizer which allows the use of a low-cost crystal (typically 16 MHz)

Especially suited for the NXP Silicon Tuner TDA1827x

No SAW filter needed

Low application effort and external component count in combination with the

TDA1827x

Simple upgrade of TDA8295 possib le

12-bit low power IF ADC on chip running with 54 MHz or 27 MHz

Two 10-bit DACs on chip for CVBS and SSIF or audio

Easy programming for I2C-bus

High flexibility due to various I2C-bus programming registers

I2C-bus interface and I2C-bus feed-through for tuner programming

Four I2C- bus addresses selectable via two external pins

TDA8296

Digital global standard low IF demodulator for analog TV and

FM radio

Rev. 1 — 3 March 2011 Product data sheet

Product data sheet Rev. 1 — 3 March 2011 2 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

Gated IF AGC acting on black level by using H/V PLL or peak IF AGC (I2C-bus

selectable)

Internal digital logarithmic IF AGC amplifier with up to 48 dB gain and 68 dB control

range

Peak search tuner IF AGC for optimal adaptive drive of the IF ADC

Switchable IF PLL and IF AGC loop bandwidths

Precise AFC and lock detector

Accurate group delay equalization for all standards

Very robust IF demodulator coping with adverse field conditions

Wide PLL pull-in range up to ±1 660 kHz (I2C-bus selectabl e)

CVBS and SSIF or audio output with simple postfilter (capacitor only)

CVBS gain levelling stage to provide nearly constant signal amplitude during over

modulation

Video equalizer with eight settings

Nyquist filter in video baseband

Excellent video S/N (typically 60 dB weighted)

High selectivity video low-pass filter for all standards

Low video into sound crosstalk

SSIF AGC

Sound performance comparable to QSS single reference concepts

AM/FM mono sound demodulator

Switchable de-emphasis

Excellent FM sound

Good AM sound

High FM Deviation mode for China

Preprocessing of FM radio (mono and stereo) with highly selective digital band-pass

filter

No ceramic filter or external componen ts needed for FM radio

FM radio available in mono

Automatic or forced mute for mono sound

Automatic or forced blank for video

Mostly digital FIR filter implementation (NSC notches and video low-pass filters)

Three GPIO pins

Power-On Reset (POR) block for reliable power-up behavior

Very low total power dissipation (typically 150 mW)

No power sequence requirement

Standby mode (typically 5 mW)

40-pin HVQFN package

CMOS technology (0.090 μm 1.2 V and 3.3 V)

3. Applications

TV applications

Recording

PC TV applications

Product data sheet Rev. 1 — 3 March 2011 3 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

4. Quick reference data

Table 1. Quick reference data

Power supplies 3. 3 V, 1.2 V; Tamb = 25

C; PC/SC1 for L and M = 10 dB, all others 13 dB; nominal residual picture carrier of

3 % for L/L’ , 10 % for M, 10 % for B/G, 12.5 % for D/K, 20 % for I; FM/AM modulation = 54 %, 1 kHz modulation frequency;

measured in application PCB (see Figure 22 and Figure 23) with 16 MHz crystal frequency, terminated with 75

(CVBS) and

1 k

(SSIF/audio). Operation mode set via easy programming (Section 9.3.1), otherwise stated. Low IF input signal at -3dB

full scale, input frequencies as defined under row header IF input.

Symbol Parameter Conditions Min Typ Max Unit

Power supply

VDD(1V2) supply voltage (1.2 V) digital and analog 1.1 1.2 1.3 V

VDD(3V3) supply voltage (3.3 V) digital and analog 3.0 3.3 3.6 V

IDD(tot)(1V2) total supply current (1.2 V) -49 -mA

IDD(tot)(3V3) total supply current (3.3 V) -65 -mA

Ptot total power dissipation default settings; fs = 54 MHz at ADC;

DAC application in accordance to

Figure 23

-270 -mW

fs = 54 MHz at ADC; DAC application in

accordance to Figure 24 -150 -mW

Standby mode - 5 8 mW

IF input

Vi(p-p) peak-to-peak inp ut voltage for full-scale ADC input (0 dBFS) 0.7 0.8 0.9 V

Viinput voltage operational input related to ADC full

scale; all standards; sum of all signals −3−3−3dBFS

fiinput frequency PC / SC1

M/N standard -5.40 / 0.90 -MHz

B standard -6.40 / 0.90 -MHz

G/H standard -6.75 / 1.25 -MHz

I standard -7.25 / 1.25 -MHz

D/K standard -6.85 / 0.35 -MHz

L standard -6.75 / 0.25 -MHz

L-accent standard -1.25 / 7.75 -MHz

FM radio -1.25 -MHz

Carrier recovery FPLL

B−3dB(cl) closed-loop −3 dB

bandwidth wide -60 -kHz

Δfpullin pull-in frequency range [1] -±830 -kHz

mover(PC) picture carrier over

modulation index black for L/L-accent standard; flat field

white else 115 117 - %

IF demodulation (video equalizer in Flat mode)

αsup(stpb) stop-band suppression video low-pass filter (M/N, B/G/H, I, D/K,

L/L-accent standard) -−60 -dB

tripple(GDE) group delay equalizer

ripple time peak value for B/G/H half, D/K half,

I flat, M (FCC) full, L/L-accent full

standard

-20 40 ns

Product data sheet Rev. 1 — 3 March 2011 4 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

CVBS output

Vo(p-p) peak-to-peak output

voltage negative PC modulation (all standards

except L/L-accent); 75 Ω DC load;

sync-white modul ation; 90 % (nominal)

0.9 1.0 1.1 V

positive PC modulation (L/L-accent

standard); 75 Ω DC load; sync-white

modulation; 97 % (nominal)

0.9 1.0 1.1 V

Bvideo(−3dB) −3 dB video bandwidth overall video response; CVBS equalizer

flat

all standards except M/N 4.7 4.85 -MHz

M/N standard 3.8 3.9 -MHz

αresp(f) frequency response video equalizer; 8 equally spaced

settings; value at 3.9 MHz −5 - +4.5 dB

Gdif differential gain “ITU-T J.63 line 330” -1.5 5 %

ϕdif differential phase “ITU-T J.63 line 330” -1.0 3deg

(S/N)wweighted signal-to-noise

ratio all standards; unified weighting filter

(“ITU-T J.61”); PC at −6 dBFS 57 60 -dB

SSIF/mono sound out put

Vo(SSIF)(RMS) RMS SSIF output voltage 1 kΩ DC or AC load; no modulation;

PC / SC1 = 13 dB

M standard 105 115 127 mV

B standard 97 104 116 mV

G/H standard 97 104 116 mV

D/K standard 89 96 106 mV

I standard 93 100 111 mV

L standard 89 96 106 mV

L-accent standard 89 96 106 mV

FM radio (single carrier) 94 103 115 mV

Vo(AF)(RMS) RMS AF output voltage 1 kΩ DC or AC load

M standard; 54 % modulation degree

(±13.5 kHz FM deviation before

pre-emphasis)

98 116 135 mV

B, G/H, I, D/K standard;

54 % modulation degree (±27 kHz

FM deviation before pre-emphasis)

107 126 144 mV

αhr(AF) AF headroo m before clipping; 1 kΩ DC or AC load

M standard; related to ±25 kHz peak

deviation before pre-emphasis -7 -dB

B, G/H, I, D/K standard; related to

±50 kHz peak deviation before

pre-emphasis

-7 -dB

Table 1. Quick reference data …continued

Power supplies 3. 3 V, 1.2 V; Tamb = 25

C; PC/SC1 for L and M = 10 dB, all others 13 dB; nominal residual picture carrier of

3 % for L/L’ , 10 % for M, 10 % for B/G, 12.5 % for D/K, 20 % for I; FM/AM modulation = 54 %, 1 kHz modulation frequency;

measured in application PCB (see Figure 22 and Figure 23) with 16 MHz crystal frequency , terminated with 75

(CVBS) and

1 k

(SSIF/audio). Operation mode set via easy programming (Section 9.3.1), otherwise stated. Low IF input signal at -3dB

full scale, input frequencies as defined under row header IF input.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 1 — 3 March 2011 5 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

[1] The pull-in range can be doubled to ±1 660 kHz by I2C-bus register like described in Table 16. Then the AFC read-out has 256 steps.

[2] To set audio gain to +6 dB for internal sound demodulation, register 22h has to be programmed to 08h.

5. Ordering information

THD total harmonic distortion FM; for 50 kHz deviation before

pre-emphasis (25 kHz for M standard) -0.15 0.3 %

AM; m = 80 % - 0.5 1 %

BAF(−3dB) −3 dB AF bandwidth AM 20 27 -kHz

FM 40 50 -kHz

(S/N)w(AF) AF weighted

signal-to-noise ratio via internal mono sound demodulator;

“ITU-R BS.468-4”; FM mode related to

27 kHz deviation before pre-emphasis;

10 % residual PC; SC1; color bar picture

52 54 -dB

via internal mono sound demodulator;

(audio gain +6 dB) “ITU-R BS.468-4”;

AM; m = 54 %; 3 % residual PC; SC1;

color bar picture

[2] 40 44 -dB

Table 1. Quick reference data …continued

Power supplies 3. 3 V, 1.2 V; Tamb = 2 5

C; PC/SC1 for L and M = 10 dB, all others 13 dB; nominal residual picture carrier of

3 % for L/L’ , 10 % for M, 10 % for B/G, 12.5 % for D/K, 20 % for I; FM/AM modulation = 54 %, 1 kHz modulation frequency;

measured in application PCB (see Figure 22 and Figure 23) with 16 MHz crystal frequency , terminated with 75

(CVBS) and

1 k

(SSIF/audio). Operation mode set via easy programming (Section 9.3.1), otherwise stated. Low IF input signal at -3dB

full scale, input frequencies as defined under row header IF input.

Symbol Parameter Conditions Min Typ Max Unit

Table 2. Orderi ng informatio n

Type number Package

Name Description Version

TDA8296HN HVQFN40 plastic thermal enhanced very thin quad flat package; no leads;

40 terminals; body 6 × 6 × 0.85 mm SOT618-1

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xxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxx

xxxxxxxxxxxxxxxx xxxxxxxxxxxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxx x x

Product data sheet Rev. 1 — 3 March 2011 6 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

6. Functional diagram

Fig 1. Functional diag ram of TDA82 9 6

008aaa13

analog

CVBS

analog SSIF

mono sound

low IF

signal

tuner

IF AGC

I2C-bus

GATED AGC

DETECTOR

AND

INTEGRATOR

H/V PLL

VIDEO

DAC

UPSAMPLER

VIDEO/

GROUP DELAY

EQUALIZER

VIDEO

LOW-PASS

FILTER

SWITCH

I2C-BUS

UPSAMPLER SOUND

DAC

NYQUIST

SLOPE

PLL

DEMODULATOR

FILTERS

AND

AGC AMPLIFIER

PEAK DETECTOR

AND

INTEGRATOR

BIT STREAM

DAC

crystal or

frequency

reference

CLOCK

PROCESSOR

AND PLL

SUPPLY, REFERENCE

AND

DECOUPLING

ADC

SSIF AND FM RADIO

BAND-PASS FILTERS

AND AGC

CORDIC AM/FM

SOUND DEMODULATOR

POWER-ON

RESET

Product data sheet Rev. 1 — 3 March 2011 7 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

7. Pinning information

7.1 Pinning

Fig 2. Pin configuration for HVQFN40

Table 3. Pin allocation table

Pin Symbol Pin Symbol

1IF_POS 2IF_NEG

3 VDDA(ADC)(1V2) 4 VDDD1(1V2)

5 VSSD1 6i.c.

7 VDDA(PLL)(1V2) 8XIN

9XOUT 10 VSSA(PLL)

11 RSET 12 VSSA(DAC)

13 V_IOUTN 14 V_IOUTP

15 VDDA(DAC1)(3V3) 16 S_IOUTN

17 S_IOUTP 18 VDDA(DAC2)(3V3)

19 SADDR0 20 SADDR1

21 RST_N 22 TDO

23 TDI 24 TMS

25 VDDD2(1V2) 26 VSSD2

27 TCK 28 SCL

29 SDA 30 TRST_N

008aaa139

TDA8296HN

RST_N

XOUT

VSSA(PLL)

TDO

XIN TDI

VDDA(PLL)(1V2) TMS

i.c. VDDD2(1V2)

VSSD1 VSSD2

VDDD1(1V2) TCK

VDDA(ADC)(1V2) SCL

IF_NEG SDA

IF_POS TRST_N

RSET

VSSA(DAC)

V_IOUTN

V_IOUTP

VDDA(DAC1)(3V3)

S_IOUTN

S_IOUTP

VDDA(DAC2)(3V3)

SADDR0

SADDR1

VSSA(ADC)

n.c.

i.c.

IF_AGC

i.c.

VSSDR

VDDDR(3V3)

GPIO0/VSYNC

GPIO1/SCL_O

GPIO2/SDA_O

10 21

9 22

8 23

7 24

6 25

5 26

4 27

3 28

2 29

1 30

terminal 1

index area

Transparent top view

Product data sheet Rev. 1 — 3 March 2011 8 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

7.2 Pin description

31 GPIO2/SDA_O 32 GPIO1/SCL_O

33 GPIO0/VSYNC 34 VDDDR(3V3)

35 VSSDR 36 i.c.

37 IF_AGC 38 i.c.

39 n.c. 40 VSSA(ADC)

die pad global ground at backside contact

Table 3. Pin allocation table …continued

Pin Symbol Pin Symbol

Table 4. Pin description

Symbol Pin Type[1] Description

Reset

RST_N 21 IThe RST_N input is asynchronous and active LOW , and clears the TDA8296. When

RST_N goes LOW, the circuit immediately enters its Reset mode and normal

operation will resume four XIN signal falling edges later after RST_N returns HIGH.

Internal register contents are all initialized to their default values. The minimum width

of RST_N at LOW level is four XIN clock periods.

Reference

XIN 8 I Crystal oscillator input pin. In Slave mode (typically), the XIN input simply receives a

16 MHz clock signal (fREF) from an external device (typically from the TDA1827x). In

Oscillator mode, a fundamental 16 MHz (typically) crystal is connected between

pin XIN and pin XOUT.

XOUT 9 O Crystal oscillator output pin. In Slave mode, the XOUT output is not connected . In

Oscillator mode a fundamental 16 MHz (typically) crystal is connected between pin

XIN and pin XOUT.

I2C-bus

SDA 29 I/O, OD I2C-bus bidirectional serial data. SDA is an open-drain output and therefore requires

an external pull-up resistor (typically 4.7 kΩ).

SCL 28 I I2C-bus clock input. SCL is nominally a square wave with a maximum frequency of

400 kHz. It is generated by the system I2C-bus master.

SADDR0 19 IThese two bits allow to select four possible I2C-bus addresses, and therefore

permits to use several TDA8296 in the same application and/or to avoid conflict with

other ICs. The complete I2C-bus address is: 1, 0, 0, SADDR1, 0, 1, SADDR0, R/W

(see also Section 9.1).

SADDR1 20 I

I2C-bus feed-through switch or GPIO

GPIO2/SDA_O 31 I/O, OD SDA_O is equivalent to SDA but can be 3-stated by I2C-bus programming. It is the

output of a switch controlled by I2CSW_EN parameter. SDA_O is an open-drain

output and therefore requires an external pull-up resistor (see Section 9.3.18).

GPIO1/SCL_O 32 I/O, OD SCL_O is equivalent to SCL input but can be 3-stated by I2C-bus programming.

SCL_O is an open-drain output and therefore requires an externa l pull-up resistor

(see Section 9.3.18). For proper functioning of the I2C-bus feed-through, a capacitor

C = 33 pF to GND must be added (see Section 13.6).

V-sync or GPIO

GPIO0/VSYNC 33 I/O, OD vertical synchronization pulse needed for the NXP Silicon Tuner

(see Section 9.3.18)

Tuner IF AGC

IF_AGC 37 I/O, OD, T tuner IF AGC output

Product data sheet Rev. 1 — 3 March 2011 9 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

[1] The pin types are defined in Table 5.

Boundary sca n

TMS 24 ITest mode select provides the logic levels needed to change the TAP controller from

state to state during the boundary scan test.

TRST_N 30 ITest reset is used to reset the TAP controller (active LOW). Grounding is mandatory

in Functional mode.

TCK 27 ITest clock is used to drive the TAP controller.

TDI 23 ITest data input is the serial data input for the test data instruction.

TDO 22 OTest data output is the serial test data output pin. The data is provided on th e falling

edge of TCK.

ADC

IF_POS 1AI IF positive analog input for internal ADC

IF_NEG 2AI IF negative analog input for internal ADC

DAC

V_IOUTP 14 AO positive analog current output of the video output

V_IOUTN 13 AO negative analog current output of the video output

S_IOUTP 17 AO positive analog current output of the SSIF/mono sound output

S_IOUTN 16 AO negative analog current output of the SSIF/mono sound output

RSET 11 IExternal bias setting of the DACs. An external resistor (1 kΩ typical) has to be

connected between RSET and the analog ground of the board. This resistor

generates the current into the DACs and also defin es the full scale output current.

The total parasitic capacitance seen externally from the RSET pin has to be lower

than 20 pF.

Supplies and grou nds

VDDA(DAC1)(3V3) 15 PS DAC1 (video DAC) and DAC reference modu le analog supply voltage (3.3 V typical)

VDDA(DAC2)(3V3) 18 PS DAC2 (sound DAC) analog supply voltage (3.3 V typical)

VSSA(DAC) 12 GND DAC reference module analog ground supply voltage (0 V typical)

VDDA(ADC)(1V2) 3PS IF ADC analog supply voltage (1.2 V typical)

VSSA(ADC) 40 GND ADC analog ground supply voltage (0 V typical)

VDDD1(1V2) 4PS ADC, PLL and DACs digital supply voltage (1.2 V typical)

VSSD1 5GND ADC, PLL and DACs digital ground supply voltage (0 V typical)

VDDA(PLL)(1V2) 7PS crystal oscillator and clock PLL analog supply voltage (1.2 V typical)

VSSA(PLL) 10 GND crystal oscillator and clock PLL analog ground supply voltage (0 V typical)

VDDD2(1V2) 25 PS core digital supply voltage (1.2 V typical)

VSSD2 26 GND core digital ground supply voltage (0 V typical)

VDDDR(3V3) 34 PS ring digital supply voltage (3.3 V typical)

VSSDR 35 GND ring digital ground supply voltage (0 V typical)

VSS die pad GND

Other pins

i.c. 6, 36,

38 Iinternally connected; connect to ground

n.c. 39 Inot connected

Table 4. Pin description …continued

Symbol Pin Type[1] Description

Product data sheet Rev. 1 — 3 March 2011 10 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

8. Functional description

8.1 IF ADC

The low IF spectrum (1 MHz to 10 MHz) from the Silicon Tuner TDA1827x is fed

symmetrically to the 12-bit IF ADC of the TDA8296, where it is sampled with 54 MHz or

27 MHz. All the anti-aliasing filtering is already done in the Silicon Tuner.

8.2 Filters

The internal filters permit to reduce the sampling rate to 13.5 MHz, and to form a complex

signal to ease the effort of further signal processing. Before this, the DC offset (coming

from the ADC) is removed.

In addition, standard dependent notch filters for the adjacent sound carriers protect the

picture carrier PLL from malfunctioning and avoid disturb ances (i.e. moire) becoming

visible in the video output.

8.3 PLL demodulator

The second-order PLL is the core block of the whole IC. It is very robust against adverse

field conditions, like excessive over modulation, no residua l carrier presence or unwanted

phase or frequen cy modulation of the picture car rier. The PLL output is the synchronously

demodulated channel.

The AFC data is available via the I2C-bus.

8.4 Nyquist filter, video low-pass filter, video and group delay equalizer,

video leveling

The afore-mentioned down-mixed complex signal at the mixer CORDIC output, already

consisting of the demodulated content of the picture carrier togethe r with the sound

carriers (the so-called intercarr iers), is running through a Nyquist filter to get a flat video

response and is made real.

Afterwards, a video low-pass filter suppresses the sound carriers and other disturbers.

Next comes the equalizer circuit to remove the transmitter group delay predistortion.

Table 5. Pin type description

Type Description

AI analog input

AO analog output

GND ground

Idigital input

I/O digital input and output

Odigital output

OD open-drain output

PS power supply

T3-state

Product data sheet Rev. 1 — 3 March 2011 11 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

A video leveling stage follows, which brings the output within the SCART specification

(±3 dB overall), despite heavy over modulation. The response time is made very slow.

Finally, a video equalizer allows to compensate the perhaps non-flat frequency response

from the tuner or to change the overall video response according to customer wish (i.e.

peaking or early roll-off).

8.5 Upsampler and video DAC

The filtered and compensated CVBS signal is connected to the oversampled 10-bit video

DAC (fs = 108 MHz) via an interpolation stage. The strong oversampling replaces a

former complicated LCR postfiltering by a simple first-order RC low-pass filter to remove

the DAC image frequencies sufficiently. This holds also for th e so un d DAC, describ e d in

Section 8.6.

8.6 SSIF/mono sound processing

The complex signal is routed via a band-pass, AGC and interpolation filter to the 10-bit

sound DAC for the recovery of the seco nd sound carriers (SSIF). A very sharp band-p ass

filter at 5.5 MHz is added in the FM Radio mode to remove neighbor channels. This also

eases the dynamic burden on the following ADC in the demodulator/decoder chip. The

afore-men tio ne d high -s ele c tiv ity ba nd - pass, which re pla ce s th e f orm er cera m ic f ilte r, is

located behind a frequ ency shifter. In there, the incoming wanted FM radio channel from

the Silicon Tuner is changed from 1.25 MHz to 5.5 MHz.

Moreover, the complex signal is demodulated in a linear CORDIC detector and low-pass

filtered to attenuate the video spectr um and the second sound carrier, respectively other

disturbers above the intercarrier. The output of the linear CORDIC (phase information) is

differentiated for getting the demodulated FM audio. The AM demodulation is executed in

a synchronous fashion by using a narrow-band PLL demodulator.

A de-emphasis filter is implemented for FM standards, before the audio is interpolated to

108 MHz as in the CVBS case.

The mono audio is made availab le in the sou nd DAC via a n I 2C-bus controlled selector in

case the intercarrier path is not used for driving an external stereo demodulator.

However, if the mono audio output has to meet the SCART specification, an external

cheap operational amplifier with 12 dB gain becomes necessary, because the low supply

voltage for the TDA8296 doesn’t allow such high levels like 2 V (RMS) maximum.

8.7 Tuner IF AGC

This AGC controls the tuner IF AGC amplifier in the TDA1827x in such a way, that the

IF ADC is always running with a permanent headroom of 3 dB for the sum of all signals

present at the ADC input. This ensures an always optimal exploitation of the dynamic

range in the IF ADC.

The detection is don e in peak Sea rch mode d uring a field perio d. The att a ck time is ma de

much faster than the decay time in order to avoid transient clipping effects in the IF ADC.

This can happen during channel change or airplane flutter conditions.

Product data sheet Rev. 1 — 3 March 2011 12 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

The above wideband, slowly acting AGC loop (uncorr elated) is of first-order integral

action. It is closed via the continuous tuner IF AGC amplifier in the Silicon Tuner via a

bit stream DAC (PWM signal at 13.5 MHz, 27 MHz or 54 MHz) and an external and

uncritical first-order RC low-pass.

8.8 Digital IF AGC

Common to both IF AGC concepts is the peak search algorithm as long as the H/V PLL is

not locked. This is of advant age for the acquisition by avoiding han g-ups due to excessive

overloading, so being able to leave the saturated condition by reducing the gain.

Two Detection modes are made available in the IC via I2C-bus.

•Black level gated AGC:

The first mode uses an IF AGC detector which is gated with a very ro bust and

well-proven H/V sync PLL block on board. Gating occurs on the black leve l (most of

the time on the back porch) of the video signal and the control is delivered after an

error integration and exponential weighting to the internal IF AGC amplifier. This

IF AGC amplifier, in fact a multiplier, has a control range of −20 dB to +48 dB.

•Peak AGC:

A fast attack and slow decay action cares for a good and nearly clip-free transient

behavior. This proved to be more robust for non-standard signals, like sync clipping

along the transmitter/receiver chain.

With respect to the IF AGC speed generally, only the gated black level or peak sync

digital IF AGC can be made fast. However the peak search tuner IF AGC, used for

positive modulation standards (L and L-accent standard), is rather slow because the

VITS is present only once in a field.

The correlated or narrow-band AGC loop, closed via the continuous IF AGC amplifier

in the TDA8296, is of first-order integral action and settles at a constant IF input level

with a permanent head room of 12 dB (picture carrier). This headroom is needed for

the own sound carriers and the leaking neighbor (N − 1) spectrum.

8.9 Clock generation

Finally, either an external reference frequency (i.e. from the Silicon Tuner) or an own

on-chip crystal oscillator in the TDA8296 feeds the internal PLL synthesizer to generate

the necessary clock signals.

9. I2C-bus control

9.1 Protocol of the I2C-bus serial interface

The TDA8296 internal registers are accessible by means of the I2C-bus serial interface.

The SDA bidirectional pin is used as the data input/output pin and SCL as the clock input

pin. The highes t S CL sp ee d is 40 0 kHz.

Product data sheet Rev. 1 — 3 March 2011 13 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

9.1.1 Write mode

Fig 3. I2C-bus Write mode

Table 6. Address format

76543210

100SADDR1 01SADDR0 R/W

Table 7. I2C-bus transfer description

Field Bit Description

S - START condition

Byte 1 7 to 5 device address

4SADDR1

3 and 2 device address

1SADDR0

0R/W = 0 for write action

A - acknowledge

Byte 2 7 to 0 start index

A - acknowledge

Byte 3 7 to 0 data 1

A - acknowledge

Byte n 7 to 0 data n

A - acknowledge

P - STOP condition

a. Address 84h, write 02h in register 01h

b. Address 84h, write 05h in register 02h and 04h in register 03h

Fig 4. Examples I2C-bus Write mode

001aad38

BYTE 1 BYTE 2 BYTE 3 BYTE nSAAA AP

address 0 start index data 1 data nstart ack ack ack .... ack stop

001aah35

BYTE 1SA

1000 0100

BYTE 2

0000 0001

BYTE 3

0000 0010start ack

ack

stop

001aah35

BYTE 1S

1000 0100

BYTE 2

0000 0010

BYTE 3

0000 0101

BYTE 4

0000 0100

start

ack

stop

Product data sheet Rev. 1 — 3 March 2011 14 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

9.1.2 Read mode

Fig 5. I2C-bus Read mode

001aad42

BYTE 1S

address 0

BYTE 2

start index

BYTE 3

address 1

BYTE 4

value 1

BYTE n

value n

start

ack

ack ....

ack

stop

start

Table 8. I2C-bus transfer description

Field Bit Description

S - START condition

Byte 1 7 to 5 device address

4SADDR1

3 and 2 device address

1SADDR0

0R/W = 0 for write action

A - acknowledge

Byte 2 7 to 0 start index

A - acknowledge

S - START condition (without stop before)

Byte 3 7 to 5 device address

4SADDR1

3 and 2 device address

1SADDR0

0R/W = 1 for read action

A - acknowledge

Byte 4 7 to 0 value 1

A - acknowledge

Byte n 7 to 0 value n

A - acknowledge

P - STOP condition

Address 84h, read register 02h with value 05h and read register 03h with value 04h

Fig 6. Example I2C-bus Read mode

001aah35

BYTE 1S

1000 0100

BYTE 2

0000 0010

BYTE 3

1000 0101

BYTE 4

0000 0101

BYTE 5

0000 0100

start

ack

stop

start

Product data sheet Rev. 1 — 3 March 2011 15 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

9.2 Register overview

The TDA8296 internal registers are accessible by me ans of the I2C-bus serial inter face as

described in Section 9.1. In Table 10 and Table 9 an overview of all the registers is given,

the register description can be found in Section 9.3.

Table 9. I2C-bus register reference

Index Name I2C-bus access Default value Reference

00h STANDARD R/W 01h Table 11

01h EASY_PROG R/W 00h Table 12

02h DIV_FUNC R/W 04h Table 14

03h ADC_HEADR R/W 01h Table 15

04h PC_PLL_FUNC R/W 24h Table 16

05h SSIF_MUTE R/W 04h Table 33

06h reserved R/W 48h[1] -

07h reserved R/W 84h[1] -

08h reserved R/W 08h[1] -

09h DTO_PC_LOW R/W 9Ah Table 17

0Ah DTO_PC_MID R/W 99h Table 17

0Bh DTO_PC_HIGH R/W 99h Table 17

0Ch DTO_SC_LOW R/W 3Dh Table 19

0Dh DTO_SC_MID R/W 20h Table 19

0Eh DTO_SC_HIGH R/W 59h Table 19

0Fh FILTERS_1 R/W 21h Table 21

10h FILTERS_2 R/W 31h Table 22

11h GRP_DELAY R/W 01h Table 23

12h D_IF_AGC_SET_1 R/W A0h Table 24

13h D_IF_AGC_SET_2 R/W 90h Table 25

14h reserved R/W 67h[1] -

15h T_IF_AGC_SET R/W 88h Table 26

16h T_IF_AGC_LIM R/W F0h Table 27

17h T_IF_AGC_FORCE R/W 3Fh Table 28

18h reserved R/W 02h[1] -

19h reserved R/W 88h[1] -

1Ah reserved R/W 80h[1] -

1Bh reserved R/W 00h[1] -

1Ch V_SYNC_DEL R/W 6Fh Table 29

1Dh CVBS_SET R/W 31h Table 30

1Eh CVBS_LEVEL R/W 73h Table 31

1Fh CVBS_EQ R/W 10h Table 32

20h SOUNDSET_1 R/W 21h Table 34

21h SOUNDSET_2 R/W 22h Table 35

22h SOUND_LEVEL R/W 08h Table 36

23h SSIF_LEVEL R/W AFh Table 37

Product data sheet Rev. 1 — 3 March 2011 16 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

24h ADC_SAT R - Table 38

25h AFC R - Table 39

26h HVPLL_STAT R - Table 41

27h D_IF_AGC_STAT R - Table 42

28h T_IF_AGC_STAT R - Table 43

29h reserved R - -

2Ah reserved R/W 00h[1] -

2Bh ALT_FILT_COEF R/W 00h[1] Table 44

2Ch reserved R - -

2Dh SSIF_AGC_STAT_REG R - Table 45

2Eh not used R/W 00h -

2Fh IDENTITY R - Table 46

30h CLB_STDBY R/W 01h Table 47

31h reserved R/W 00h[1] -

32h reserved R - -

33h ADC_CTL R/W 24h Table 48

34h ADC_CTL_2 R/W 05h Table 49

35h VIDEODAC_CTL R/W 7Eh Table 50

36h AUDIODAC_CTL R/W 00h Table 51

37h DAC_REF_CLK_CTL R/W 40h Table 52

38h reserved R/W 20h[1] -

39h to 3Bh not used R/W 00h -

3Ch reserved R/W 00h[1] -

3Dh not used R/W 00h -

3Eh reserved R/W 61h[1] -

3Fh PLL_REG07 R/W 00h Table 53

40h PLL_REG08 R/W 1Ah Table 53

41h PLL_REG09 R/W 02h Table 53

42h PLL_REG10 R/W 01h Table 53

43h reserved R/W 00h[1] -

44h GPIOREG_0 R/W 1Bh Table 54

45h GPIOREG_1 R/W C1h Table 55

46h GPIOREG_2 R/W 07h Table 57

47h to 4Ah reserved R - -

4Bh GD_EQ_SECT1_C1 R/W 00h Table 58

4Ch GD_EQ_SECT1_C2 R/W 00h Table 58

4Dh GD_EQ_SECT2_C1 R/W 00h Table 58

4Eh GD_EQ_SECT2_C2 R/W 00h Table 58

4Fh GD_EQ_SECT3_C1 R/W 00h Table 58

50h GD_EQ_SECT3_C2 R/W 00h Table 58

51h GD_EQ_SECT4_C1 R/W 00h Table 58

Table 9. I2C-bus register reference …continued

Index Name I2C-bus access Default value Reference

Product data sheet Rev. 1 — 3 March 2011 17 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

[1] This register must not be written with values other than default.

52h GD_EQ_SECT4_C2 R/W 00h Table 58

53h to 56h not used R/W 00h -

57h CVBS_EQ_COEF0_LOW R/W 00h Table 60

58h CVBS_EQ_COEF0_HIGH R/W 00h Table 60

59h CVBS_EQ_COEF1_LOW R/W 00h Table 60

5Ah CVBS_EQ_COEF1_HIGH R/W 00h Table 60

5Bh CVBS_EQ_COEF2_LOW R/W 00h Table 60

5Ch CVBS_EQ_COEF2_HIGH R/W 00h Table 60

5Dh CVBS_EQ_COEF3_LOW R/W 00h Table 60

5Eh CVBS_EQ_COEF3_HIGH R/W 00h Table 60

5Fh CVBS_EQ_COEF4_LOW R/W 00h Table 60

60h CVBS_EQ_COEF4_HIGH R/W 00h Table 60

61h CVBS_EQ_COEF5_LOW R/W 00h Table 60

62h CVBS_EQ_COEF5_HIGH R/W 04h Table 60

63h to 66h not used R/W 00h -

67h reserved R/W FEh[1] -

68h reserved R/W 0Fh[1] -

69h reserved R/W FAh[1] -

6Ah reserved R/W 0Fh[1] -

6Bh reserved R/W EFh[1] -

6Ch reserved R/W 0Fh[1] -

6Dh reserved R/W DDh[1] -

6Eh reserved R/W 0Fh[1] -

6Fh reserved R/W BEh[1] -

70h reserved R/W 0Fh[1] -

71h reserved R/W 8Ah[1] -

72h reserved R/W 0Fh[1] -

73h reserved R/W 32h[1] -

74h reserved R/W 0Fh[1] -

75h reserved R/W 6Fh[1] -

76h reserved R/W 0Eh[1] -

77h reserved R/W F4h[1] -

78h reserved R/W 0Ah[1] -

79h to 7Bh not used R/W 00h -

7Ch to 9Ch reserved R/W 00h[1] -

9Dh to A0h not used R/W 00h -

A1h and A2h reserved R/W 00h[1] -

Table 9. I2C-bus register reference …continued

Index Name I2C-bus access Default value Reference

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Product data sheet Rev. 1 — 3 March 2011 18 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

Table 10. I2C-bus registers

Index Name 7 (MSB) 654321 0 (LSB)

00h STANDARD STANDARD[7:0]

01h EASY_PROG 0 000000 ACTIVE

02h DIV_FUNC T_IF_SEL[1:0] 000POL_DET VID_MOD IF_SWAP

03h ADC_HEADR 0 000ADC_HEADR[3:0]

04h PC_PLL_FUNC PC_PLL_BW[4:0] PLL_ON PULL_IN 0

05h SSIF_MUTE 0 0 SSIF_AFC_WIN[3:0] SSIF_MUTE_

TYPE SSIF_MUTE_

CTRL

06h[1] reserved 0 100100 0

07h reserved 1 000010 0

08h reserved 0 000100 0

09h DTO_PC_LOW DTO_PC[7:0]

0Ah DTO_PC_MID DTO_PC[15:8]

0Bh DTO_PC_HIGH DTO_PC[23:16]

0Ch[2] DTO_SC_LOW DTO_SC[7:0]

0Dh[3] DTO_SC_MID DTO_SC[15:8]

0Eh[3] DTO_SC_HIGH DTO_SC[23:16]

0Fh FILTERS_1 VID_FILT[2:0] NOTCH_FILT[4:0]

10h[4] FILTERS_2 0 0 VID_FILT_

LOW_RIP 1SBP[3:0]

11h GRP_DELAY GD_EQ_CTRL 00GRP_DEL[4:0]

12h D_IF_AGC_SET_1 1D_IF_AGC_

MODE 10000 0

13h D_IF_AGC_SET_2 1D_IF_AGC_BW[6:0]

14h reserved 0 110111 1

15h T_IF_AGC_SET POL_TIF T_IF_AGC_SPEED[6:0]

16h T_IF_AGC_LIM UP_LIM[3:0] LOW_LIM[3:0]

17h T_IF_AGC_FORCE T_FORCE T_FORCE_VAL[6:0]

18h reserved 0 000010 0

19h reserved 1 000100 0

1Ah reserved 1 000000 0

1Bh reserved 0 000000 0

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Product data sheet Rev. 1 — 3 March 2011 19 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

1Ch V_SYNC_DEL VS_WIDTH[1:0] VS_POL VS_DEL[4:0]

1Dh CVBS_SET 0 0 1[5] 1CVBS_EQ_

CTRL FOR_BLK AUTO_BLK 1

1Eh CVBS_LEVEL CVBS_LVL[7:0]

1Fh CVBS_EQ CVBS_EQ[7:0]

20h SOUNDSET_1 0AM_FM_SND[1:0] DEEMPH[4:0]

21h SOUNDSET_2 0SSIF_AGC_

TC SSIF_AGC_

CTRL HD_DK FOR_MUTE AUTO_

MUTE SSIF_SND[1:0]

22h SOUND_LEVEL 0 00SND_LVL[4:0]

23h SSIF_LEVEL SSIF_LVL[7:0]

24h ADC_SAT ADC_SAT[7:0]

25h AFC AFC[7:0]

26h HVPLL_STAT - - NOISE_DET MAC_DET FIDT V_LOCK F_H_LOCK N_H_LOCK

27h D_IF_AGC_STAT D_IF_AGC_STAT[7:0]

28h T_IF_AGC_STAT T_IF_AGC_STAT[7:0]

29h reserved - ------ -

2Ah reserved 0 000000 0

2Bh ALT_FILT_COEF[6] 0 00000ALT_FILT_COEF[1:0]

2Ch reserved - ------ -

2Dh SSIF_AGC_STAT SSIF_AGC_STAT[7:0]

2Eh not used 0 000000 0

2Fh IDENTITY IDENTITY[7:0]

30h CLB_STDBY 0 00000STDBY CLB

31h reserved 0 000000 0

32h reserved - ------ -

33h ADC_CTL 0 010DCIN 1SLEEP PD_ADC

34h ADC_CTL_2 0 000010 AD_SR54M

35h VIDEODAC_CTL 0B_DA_V[5:0] PD_DA_V

36h AUDIODAC_CTL 0B_DA_S[5:0] PD_DA_S

37h DAC_REF_CLK_CTL 0 100000 PD_DA_REF

Table 10. I2C-bus registers …continued

Index Name 7 (MSB) 654321 0 (LSB)

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Product data sheet Rev. 1 — 3 March 2011 20 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

38h reserved[6] 0 010000 0

39h to

3Bh not used 0 000000 0

3Ch reserved 0 000000 0

3Dh not used 0 000000 0

3Eh reserved[6] 0 110000 1

3Fh PLL_REG07[6] 0NSEL7 00000 0

40h PLL_REG08[6] MSEL[7:0]

41h PLL_REG09[6] NSEL[6:0] 0

42h PLL_REG10[6] 0 00PSEL[4:0]

43h reserved 0 000000 0

44h GPIOREG_0 GP1_CF[3:0] GP0_CF[3:0]

45h GPIOREG_1 I2CSW_EN I2CSW_ON 00GP2_CF[3:0]

46h GPIOREG_2 0 0000GP2_VAL GP1_VAL GP0_VAL

47h to

4Ah reserved - ------ -

4Bh GD_EQ_SECT1_C1 GD_EQ_SECT1_C1[7:0]

4Ch GD_EQ_SECT1_C2 GD_EQ_SECT1_C2[7:0]

4Dh GD_EQ_SECT2_C1 GD_EQ_SECT2_C1[7:0]

4Eh GD_EQ_SECT2_C2 GD_EQ_SECT2_C2[7:0]

4Fh GD_EQ_SECT3_C1 GD_EQ_SECT3_C1[7:0]

50h GD_EQ_SECT3_C2 GD_EQ_SECT3_C2[7:0]

51h GD_EQ_SECT4_C1 GD_EQ_SECT4_C1[7:0]

52h GD_EQ_SECT4_C2 GD_EQ_SECT4_C2[7:0]

53h to

56h not used 0 000000 0

57h CVBS_EQ_COEF0_

LOW CVBS_EQ_COEF0[7:0]

58h CVBS_EQ_COEF0_

HIGH 0 000CVBS_EQ_COEF0[11:8]

59h CVBS_EQ_COEF1_

LOW CVBS_EQ_COEF1[7:0]

Table 10. I2C-bus registers …continued

Index Name 7 (MSB) 654321 0 (LSB)

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Product data sheet Rev. 1 — 3 March 2011 21 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

5Ah CVBS_EQ_COEF1_

HIGH 0 000CVBS_EQ_COEF1[11:8]

5Bh CVBS_EQ_COEF2_

LOW CVBS_EQ_COEF2[7:0]

5Ch CVBS_EQ_COEF2_

HIGH 0 000CVBS_EQ_COEF2[11:8]

5Dh CVBS_EQ_COEF3_

LOW CVBS_EQ_COEF3[7:0]

5Eh CVBS_EQ_COEF3_

HIGH 0 000CVBS_EQ_COEF3[11:8]

5Fh CVBS_EQ_COEF4_

LOW CVBS_EQ_COEF4[7:0]

60h CVBS_EQ_COEF4_

HIGH 0 000CVBS_EQ_COEF4[11:8]

61h CVBS_EQ_COEF5_

LOW CVBS_EQ_COEF5[7:0]

62h CVBS_EQ_COEF5_

HIGH 0 000CVBS_EQ_COEF5[11:8]

63h to

66h not used 0 000000 0

67h reserved 1 111111 0

68h reserved 0 000111 1

69h reserved 1 111101 0

6Ah reserved 0 000111 1

6Bh reserved 1 110111 1

6Ch reserved 0 000111 1

6Dh reserved 1 101110 1

6Eh reserved 0 000111 1

6Fh reserved 1 011111 0

70h reserved 0 000111 1

71h reserved 1 000101 0

72h reserved 0 000111 1

73h reserved 0 011001 0

Table 10. I2C-bus registers …continued

Index Name 7 (MSB) 654321 0 (LSB)

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Product data sheet Rev. 1 — 3 March 2011 22 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

[1] Register 06h has to be reprogrammed to new value C4h.

[2] Register 0Ch has to be reprogrammed to new value 00h.

[3] For M/N standard (ADC clock at 54 MHz) register 0Dh and 0Eh have to be reprogrammed to new value 55h.

[4] For M/N standard use narrow SSIF band-pass filter (SBP[3:0] = 0100).

[5] For L/L-accent standard the bit has to be programmed to 0.

[6] These registers have to be programmed to the alternative value in Table 66, if an other frequency is required than 54 MHz for ADC sample frequency.

74h reserved 0 000111 1

75h reserved 0 110111 1

76h reserved 0 000111 0

77h reserved 1 111010 0

78h reserved 0 000101 0

79h to

7Bh not used 0 000000 0

7Ch to

9Ch reserved 0 000000 0

9Dh to

A0h not used 0 000000 0

A1h

and

A2h

reserved 0 000000 0

Table 10. I2C-bus registers …continued

Index Name 7 (MSB) 654321 0 (LSB)

Product data sheet Rev. 1 — 3 March 2011 23 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

9.3 Register description

If registers (or bit groups contained in registers) are programmed with invalid values, i.e.

values different from those described in the tables below, the default behavior is chosen

for the related block. Other settings than describe d in the tables are no t allo wed.

9.3.1 Standard setting with easy programming

With the implemented ‘easy programming’, only one bit sets the TV or FM radio standard

with recommended register content. If not suitab le however, any of these registers can be

written with other settings. With the rising edg e of the bit ACTIVE, some of the registers

02h to 23h are programmed internally with the standard dependent settings according to

Table 13. The content of registers with address 24h and higher is untouched.

In addition to application specific software settings following general recommendation

should be used (deviating from e asy programming values):

•Register 06h: new value C4h

•Register 0Ch: new value 00h

•M/N standard:

–Register 10h: use narrow SSIF band-pass filter (SBP[3:0] = 0100)

–Register 0Dh and 0Eh: new value 55h

Remark: When using alternative ADC sampling freque ncies the DTO settings have to be

adapted according ly.

Table 11. STANDARD register (address 00h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 to 0 STANDARD[7:0

]R/W TV or FM radio standard selection (easy

programming)

0000 0001* M/N standard

0000 0010 B standard

0000 0100 G/H standard

0000 1000 I standard

0001 0000 D/K standard

0010 0000 L standard

0100 0000 L-accent standard

1000 0000 FM radio

Table 12. EASY_PROG register (address 01h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 to 1 -R/W 000 0000* not used

0ACTIVE R/W With the rising edge of this bit, the registers

02h to 23h are programmed with the standard

dependent settings (see Table 13).

0* no action

1no action

0 to 1 activate easy programming

Product data sheet Rev. 1 — 3 March 2011 24 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

Example: To set the device to B standard e.g., please do the following steps.

1. Write 02h to re gister STANDARD, address 00h (set B standard)

2. Write 00h to register EASY_PROG, address 01h

3. Write 01h to register EASY_PROG, address 01h (due to 0 to 1 transition of ACTIVE

the device is set to B standard, i.e. registers 02h to 23h are program m ed

automatically according to Table 13)

4. Write 00h to register EASY_PROG, address 01h (reset ACTIVE to logic 0)

[1] M/N standard settings are equal to the power-on reset (default) values.

Table 13. Easy programming value s

Index Name M/N[1] BG/H ID/K LL-accent FM radio

02h DIV_FUNC 04h 04h 04h 04h 04h 06h 07h 00h

04h PC_PLL_FUNC 24h 24h 24h 24h 24h 24h 24h 20h

05h SSIF_MUTE 04h 04h 04h 04h 04h 04h 04h 04h

06h reserved 48h 48h 48h 48h 48h 48h 48h 48h

07h reserved 84h 84h 84h 84h 84h 84h 84h 04h

08h reserved 08h 08h 08h 08h 08h 08h 08h 08h

09h DTO_PC_LOW 9Ah 15h 00h BEh 8Ch 00h 26h 00h

0Ah DTO_PC_MID 99h A3h 00h 84h 1Ah 00h B4h 00h

0Bh DTO_PC_HIGH 99h 86h 80h 76h 7Eh 80h 17h 80h

0Ch DTO_SC_LOW 3Dh 7Bh 7Bh BEh BEh D6h D6h DAh

0Dh DTO_SC_MID 20h 09h 09h 84h 84h B9h B9h 4Bh

0Eh DTO_SC_HIGH 59h 6Dh 6Dh 76h 79h 72h 72h 68h

0Fh FILTERS_1 21h 42h 48h 48h 44h 44h 48h 90h

10h FILTERS_2 31h 32h 32h 32h 32h 32h 32h 34h

11h GRP_DELAY 01h 02h 02h 10h 04h 08h 08h 10h

12h D_IF_AGC_SET_1 A0h A0h A0h A0h A0h A0h A0h A0h

13h D_IF_AGC_SET_2 90h 90h 90h 90h 90h 90h 90h 08h

14h reserved 67h 67h 67h 67h 67h 67h 67h E7h

1Dh CVBS_SET 31h 31h 31h 31h 31h 31h 31h 04h

1Eh CVBS_LEVEL 73h 73h 73h 81h 75h 6Ch 6Ch 73h

1Fh CVBS_EQ 10h 10h 10h 10h 10h 10h 10h 10h

20h SOUNDSET_1 21h 22h 22h 22h 22h 44h 44h 22h

21h SOUNDSET_2 22h 22h 22h 22h 22h 22h 22h 22h

22h SOUND_LEVEL 08h 04h 04h 04h 04h 04h 04h 02h

23h SSIF_LEVEL AFh AFh AFh AFh AFh AFh AFh AFh

Product data sheet Rev. 1 — 3 March 2011 25 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

9.3.2 Diverse functions (includes tuner IF AGC Pin mode)

9.3.3 ADC headroom

Table 14. DIV_FUNC register (add ress 02h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 and 6 T_IF_SEL[1:0] R/W It determines the tuner IF AGC output Pin mode. The

open-drain output can be used in special applications

in need of a higher control voltage.

00* Normal mode

01 Open-drain mode

10 3-state mode

11 not allowed

5 and 4 - R/W 00* not used

3 - R/W 0* reserved, must be set to logic 0

2POL_DET R/W The polarity detector ensures the proper polarity of the

video signal. So, the sync impulses of the video output

are near ground level.

0polarity detector off

1* polarity detector on

1VID_MOD R/W Selects video modulation. The only standards with

positive video modulation are L and L-accent.

0* negative video modulation

1positive video modulation

0IF_SWAP R/W When HIGH, the demodulator expects a swapped IF

spectrum. This is the case in L-accent standard. This

option is also built in for flexibility reasons.

0* normal IF spectrum expected

1swapped IF spectrum expected

Table 15. ADC_HEADR register (address 03h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 to 4 - R/W 0000* not used

3 to 0 ADC_HEADR[3:0] R/W ADC_HEADR adjusts the needed headroom for the

wanted channel’s own sound carriers and the N − 1

adjacent sound carriers (PC in L-accent standard).

The ADC headroom is related to the sum of all

signals. This function is built in for debugging

purposes.

0001* ADC headroom 3 dB

0010 ADC headroom 6 dB

0100 ADC headroom 9 dB

1000 ADC headroom 12 dB

Product data sheet Rev. 1 — 3 March 2011 26 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

9.3.4 Picture carrier PLL functions

[1] The DTO_PC frequency is set via register 09h to 0Bh

[2] The DTO_PC frequency is controlled by VIF_PLL function

9.3.5 Picture and sound carrier DTO

Table 16. PC_PLL_FUNC register (address 04h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 to 3 PC_PLL_BW[4:0] R/W picture carrier PLL loop bandwidth selection

0 0001 loop bandwidth 15 kHz (not recommanded)

0 0010 loop bandwidth 30 kHz

0 0100* loop bandwidth 60 kHz

0 1000 loop bandwidth 130 kHz

1 0000 loop bandwidth 280 kHz (not recommanded)

2PLL_ON R/W the picture carrier PLL can be disengaged (e.g. in FM radio

standard)

0PLL off (FM radio)[1]

1* PLL on[2]

1PULL_IN R/W PULL_IN selects the pull-in range of the picture carrier

PLL/FPLL

0* pull-in range ±1.66 MHz

1pull-in range ±830 kHz

0 - R/W 0* reserved, must be set to logic 0

Table 17. DTO_PC_LOW, DTO_PC_MID and DTO_PC_HIGH register (address 09h to 0Bh) bit description

Legend: * = default value.

Address Register Bit Symbol Access Value Description

09h DTO_PC_LOW 7 to 0 DTO_PC[7:0] R/W 9Ah* For picture processing the digital tuned oscillator

(DTO_PC) provides its oscillation signal to the

demodulator part. For demodulation the

oscillation frequency of the DTO_PC is controlled

by the VIF_PLL. Optional the DTO_PC can

operate at fixed programmed frequency. This will

be the case if PLL_ON register is set to “off”

mode. In case of VIF_PLL mode of the DTO_PC

the register value defines the nominal frequency

of AFC register (seeTable 39). If PLL_ON register

is set to “off” mode the DTO_PC register defines

the fixed oscillation frequency value of the

DTO_PC. The frequency of the DTO_PC is in

relation to the register value by following formula:

In case of standard L’ please use the following

formula:

0Ah DTO_PC_MID 7 to 0 DTO_PC[15:8] R/W 99h*

0Bh DTO_PC_HIGH 7 to 0 DTO_PC[23:16] R/W 99h*

DTO_PC fADC 4⁄fPC

–

fADC 4⁄

---------------------------------224

×=

DTO_PC fPC 4

fADC

-----------

×224

×=

Product data sheet Rev. 1 — 3 March 2011 27 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

[1] Deviating from easy programming values for DTO_SC[23:0] the values from Table 20 should be used.

(1) relation for L’

(2) relation for systems L; M/N; B/G; I; D/K

Fig 7. TDA8296 DTO_PC characteristic

DTO_PC reg val (dec) (1E6)

0 1284

001aan388

DTO_PC

frequency

value

(MHz)

(1)

(2)

Table 18. Values of DTO_PC per TV standard at 54 MHz sampling frequency

Standard DTO_SC[23:16] DTO_SC[15:8] DTO_SC[7:0] DTO_PC frequency value

M/N 99h 99h 9Ah 5.40 MHz

B86h A3h 15h 6.40 MHz

G80h 00h 00h 6.75 MHz

I76h 84h BEh 7.25 MHz

D/K 7Eh 1Ah 8Ch 6.85 MHz

L80h 00h 00h 6.75 MHz

L-accent 17h B4h 26h 1.25 MHz

Table 19. DTO_SC_LOW, DTO_SC_MID and DTO_SC_HIGH register (address 0Ch to 0Eh) bit description

Legend: * = default value.[1]

Address Register Bit Symbol Access Value Description

0Ch DTO_SC_LOW 7 to 0 DTO_SC[7:0] R/W 00h* The DTO_SC is suited for SSIF band-pass filter

tuning. DTO_SC is calculated according to the

following formula, whereas fSC is the SSIF

band-pass center frequency:

0Dh DTO_SC_MID 7 to 0 DTO_SC[15:8] R/W 20h*

0Eh DTO_SC_HIGH 7 to 0 DTO_SC[23:16] R/W 59h*

DTO_SC fSC

fADC 4⁄

------------------ 224

×=

Product data sheet Rev. 1 — 3 March 2011 28 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

9.3.6 Filter settings

Fig 8. TDA8296 DTO_SC characteristic

DTO reg val (dec) (1E6)

0 1284

001aam354

Fsc

[MHz]

Table 20. Values for SSIF mode at 54 MHz sampling frequency

Standard DTO_SC[23:16] DTO_SC[15:8] DTO_SC[7:0] Band-pass center frequency

M/N 55h 55h 00h 4.5 MHz

B6Dh 09h 00h 5.75 MHz

G/H 6Dh 09h 00h 5.75 MHz

I76h 84h 00h 6.25 MHz

D/K 76h 84h 00h 6.25 MHz

L/L-accent 72h B9h 00h 6.05 MHz

FM radio 68h 4Bh 00h 5.5 MHz

Table 21. FILTERS_1 register (address 0Fh) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 to 5 VID_FILT[2:0] R/W video low-pass filter to remove all unwanted frequencies

(own sound carriers) above video content (see Figure 9)

001* video low-pass filter 4 MHz

010 video low-pass filter 5 MHz

100 video low-pass filter off

4 to 0 NOTCH_FILT[4:0] R/W The notch filter attenuates the adjacent sound carrier N − 1,

which is located differently dependent on standard

(see Figure 10).

0 0001* notch filter at 6.9 MHz for M/N standard

0 0010 notch filter at 7.9 MHz for B standard

0 0100 notch filter at 8.3 MH z for D/K and L standard

0 1000 notch filter at 9.25 MHz for G/H, I and L-accent standard

1 0000 notch filter bypass

Product data sheet Rev. 1 — 3 March 2011 29 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

(1) M/N standard.

(2) All other standards.

Fig 9. Video low-pass filters for sound carrier supp ression

Notch filter for NSC (NPC for L-accent standard)

(1) M/N standard.

(2) B standard.

(3) D/K and L standard.

(4) G/H, I and L-accent standard.

Fig 10. Notch filter for adjacent sound carrier su ppression

f (MHz)

07624513

008aaa223

−30

−50

−10

αresp(f)

(dB)

−70

(1) (2)

f (MHz)

01412481026

008aaa224

−30

−50

−10

αresp(f)

(dB)

−70

(1)

(2)

(3)

(4)

Product data sheet Rev. 1 — 3 March 2011 30 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

[1] SSIF band-pass center frequency is controlled by DTO_SC[23:0]. See Table 20 for recommended DTO

values.

[2] Deviating from easy programming values for FILTERS_2, the narrow SSIF band-pass filter

(SPB[3:0] = 0100) should be used for M/N standard.

Table 22. FILTERS_2 register (address 10h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 and 6 - R/W 00* not used

5VID_FILT_

LOW_RIP R/W video filter characteristic adjust

0smooth roll-off

1* low ripple

4 - R/W 1* reserved, must be set to logic 1

3 to 0 SBP[3:0] R/W The SSIF band-pass attenuates unwanted video

frequencies[1][2], e.g. color carrier. For FM radio standard

it provides almost channel selectivity (see Figure 12).

0001* SSIF band-pass, wide bandwidth

0010 SSIF band-pass, normal bandwidth (1.1 MHz, all

TV standards)

0100 SSIF band-pass, narrow bandwidth (200 kHz,

FM radio)

(1) 4 MHz video filter in smooth roll off mode

(2) 4 MHz video filter in low ripple mode

(3) 5 MHz video filter in smooth roll off mode

(4) 5 MHz video filter in low ripple mode

Fig 11. Video low pass frequency resp onse in smooth roll off or low ripple mode

frequency (MHz)

0 62

-6

-2

amplitude

response

(dB)

-10

(1) (2) (3) (4)

001aan681

Product data sheet Rev. 1 — 3 March 2011 31 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

9.3.7 Group delay equalization

(1) Wide bandwidth (e.g. for search mode).

(2) All TV standards, normal bandwidth (1.1 MHz).

(3) FM radio, narrow bandwidth (200 kHz).

Fig 12. SSIF and FM radio band-pass filters (center frequency 5.5 MHz chosen)

f (MHz)

01412481026

008aaa228

−30

−50

−10

αresp(f)

(dB)

−70

(1)

(2)

(3)

Table 23. GRP_DELAY register (address 11h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7GD_EQ_CTRL R/W group delay equalizer control; this is the control for

the freely programmable group delay equalizer; for

details see Section 9.3.19

0* off (equalizer bypassed)

1on (equalizer active)

6 and 5 -R/W 00* reserved, must be set to logic 00

4 to 0 GRP_DEL[4:0] R/W group delay equalization to correct the transmitter

predistortion

0 0001* group delay M/N standard

0 0010 group delay B/G/H standard

0 0100 group delay D/K standard

0 1000 group delay L/L-accent standard

1 0000 group delay I (flat) standard

Product data sheet Rev. 1 — 3 March 2011 32 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

9.3.8 Digital IF AGC functions

9.3.9 Tuner IF AGC functions

Table 24. D_IF_AGC_SET_1 register (address 12h) bit de scription

Legend: * = default value.

Bit Symbol Access Value Description

7 - R/W 1* reserved, must be set to logic 1

6D_IF_AGC_MODE R/W If HIGH, the digital IF AGC detection and gating is

done during the back porch of the video signal .

This Detection mode can be used for all

standards (also L/L-accent standard) without

impact on the IF AGC loop speed.

0* peak sync AGC (slow peak white L/L-accent

standard)

1black level AGC detection

5 to 0 - R/W 10 0000* reserved, must be set to logic 10 0000

Table 25. D_IF_AGC_SET_2 register (address 13h) bit de scription

Legend: * = default value.

Bit Symbol Access Value Description

7 - R/W 1* reserved, must be set to logic 1

6 to 0 D_IF_AGC_BW[6:0] R/W digital IF AGC 3 dB-loop bandwidth setting

000 0001 25 Hz

000 0010 50 Hz

000 0100 100 Hz

000 1000 200 Hz

001 0000* 400 Hz

010 0000 800 Hz

100 0000 1.6 kHz (not recommended)

Table 26. T_IF_AGC_SET register (address 15h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7POL_TIF R/W tuner IF AGC polarity

0inverted tuner IF AGC polarity

1* normal tuner IF AGC po l arity: the higher

the necessary gain, the higher the IF

AGC volt a ge

Product data sheet Rev. 1 — 3 March 2011 33 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

6 to 0 T_IF_AGC_SPEED[6:0] R/W T_IF_AGC_SPEED determines the tuner

IF AGC loop speed

000 0001 −18 dB nominal

000 0010 −12 dB nominal

000 0100 −6 dB nominal

000 1000* nominal speed (determined by the tuner

IF control slope)

001 0000 +6 dB nominal

010 0000 +12 dB nominal

100 0000 +18 dB nominal

Table 27. T_IF_AGC_LIM register (addre ss 16h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 to 4 UP_LIM[3:0] R/W The tuner IF AGC output voltage can be limited to

interface with concepts having power supply < 3.3 V.

UP_LIM determines the upper limit from 1∨2 FS (= 0h)

to FS (= Fh). The format is straight binary.

1111* set upper limit t o maximum

3 to 0 LOW_LIM[3:0] R/W LOW_LIM determines the lower tuner IF AGC output

limit from 0 (= 0h) to 1∨2 FS (= Fh). The format is

straight binary.

0000* set lower limit to minimum

Table 28. T_IF_AGC_FORCE register (address 17h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7T_FORCE R/W the tuner IF AGC output voltage can be forced

externally to a fixed voltage, determined by

T_FORCE_VAL

0* tuner IF AGC normal operation

1tuner IF AGC output voltage determined by

T_FORCE_VAL

6 to 0 T_FORCE_VAL[6:0] R/W T_FORCE_VAL determines the tuner IF AGC

forced value. So the tuner IF AGC can be fixed to

a certain value for debugging purposes. Format is

straight binary.

3Fh* 0.5 × VDD(3V3), i.e. 1.65 V nominally

XXh don’t care if T_FORCE = 0

Table 26. T_IF_AGC_SET register (address 15h) bit description …continued

Legend: * = default value.

Bit Symbol Access Value Description

Product data sheet Rev. 1 — 3 March 2011 34 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

9.3.10 V-sync adjustment

9.3.11 CVBS settings

Table 29. V_SYNC_DEL register (address 1Ch) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 and 6 VS_WIDTH[1:0] R/W VS_WIDTH determines the width (in horizontal

lines) of the V-sync gating pulse (needed for gating

of tuner RF AGC2)

00 width 1 line (64 μs)

01* width 2 lines

10 width 4 lines

11 width 16 lines

5VS_POL R/W VS_POL determines the polarity of the V-sync

pulse: if VS_POL = 1, the first edge of the pulse is

positive, el se negative.

0first edge negative

1* first edge positive

4 to 0 VS_DEL[4:0] R/W VS_DEL dete rmines the first edge position of the

output V-sync pulse compared to the beginning of

the vertical blanking interval:

0Fh* first edge 3 lines after beginning of vertical

interval

ulse_position VS_DEL 12–() lines=

Table 30. CVBS_SET register (address 1Dh) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 and 6 - R/W 00* not used

5 and 4 - R/W 11* must be set to logic 11 or in case of L/L-accent to 01

3CVBS_EQ_

CTRL R/W video equalizer mode control

0* mode using predefined settings like described in

Table 32

1free programmable mode; for details

see Section 9.3.19

2FOR_BLK R/W when active, the video output is always blanked, e.g. for

channel change (forced blank)

0* no action

1video blanked

1AUTO_BLK R/W when active, the video output is blanked if the horizontal

line lock flag (N_H_LOCK, see Table 41) is not present

0* auto-blanking off

1auto-blanking on

0 - R/W 1* reserved, must be set to logic 1

Product data sheet Rev. 1 — 3 March 2011 35 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

Table 31. CVBS_LEVEL register (address 1Eh) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 to 0 CVBS_LVL[7:0] R/W With this byte, the nominal video output leve l is freely

programmable. The format is unsigned integer (offset

binary). Settings below 40h and above C0h, which

correspond to −5 dB (40h) and +4.5 dB (C0h) related to

the default value, are forbidden. In the following some

possible settings in 1 dB steps are sho w n .

51h −3 dB nominal

5Bh −2 dB nominal

66h −1 dB nominal

73h* nominal: 1 V (p-p) video output level (sync-peak)

81h +1 dB nominal

91h +2 dB nominal

A2h +3 dB nominal

Table 32. CVBS_EQ register (address 1Fh) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 to 0 CVBS_EQ[7:0] R/W The video equalizer can be used for the

compensation of a principal tuner tilt or to change

the video frequency according to customer taste.

The figures gi ve n are at 5 MHz CVBS with respect

to low frequencies (see Figure 13).

0000 0001 The video frequency response is −8 dB for

5 MHz.

0000 0010 The video frequency response is −6 dB for

5 MHz.

0000 0100 The video frequency response is −4 dB for

5 MHz.

0000 1000 The video frequency response is −2 dB for

5 MHz.

0001 0000* The video frequency response is made flat in this

mode.

0010 0000 The video frequency response is +2 dB (peaking)

for 5 MHz.

0100 0000 The video frequency response is +4 dB (peaking)

for 5 MHz.

1000 0000 The video frequency response is +6 dB (peaking)

for 5 MHz.

Product data sheet Rev. 1 — 3 March 2011 36 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

9.3.12 SSIF and mono sound settings

Fig 13. Video equalizer curves

f (MHz)

07624135

001aah361

−2

−6

αresp(f)

(dB)

−10

Table 33. SSIF_MUTE register (address 05h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 and 6 - R/W 00* not used

5 to 2 SSIF_AFC_WIN[3:0] R/W SSIF AFC mute window configuration

0001* ±100 kHz

0010 ±200 kHz

0100 ±400 kHz

1000 ±800 kHz

1SSIF_MUTE_TYPE R/W SSIF auto-mute behavior

0* reduced gain

1mute

0SSIF_MUTE_CTRL R/W auto-mute of SSIF output

0* off

1on

Table 34. SOUNDSET_1 register (address 20h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 - R/W 0* reserved, must be set to logic 0

6 and 5 AM_FM_SND[1:0] R/W Output mode for inbuilt FM/AM mono soun d

demodulator

01* FM sound

10 AM sound (only L/L-accent standard)

XX don’t care if SSIF output is chosen

(SSIF_SND[1:0] = 10)

Product data sheet Rev. 1 — 3 March 2011 37 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

4 to 0 DEEMPH[4:0] R/W mono sound de-emphasis adjustment to

compensate transmitte r pre-emphasis; or

low-pass filter to remove out of audio band

interferers

0 0001* de-emphasis of 75 μs for M/N standard or

non-European FM radio to compensate the

transmitter pre-emphasis

0 0010 de-emphasis of 50 μs for B/G/H, D/K and

I standard or European FM radio to

compensate the transmitter pre-emphasis

0 0100 low-pass filter with 30 kHz −3 dB cut-off

frequency to remove out of audio band

interferers

0 1000 low-pass filter with 140 kHz −3 dB cut-off

frequency to drive an external BTSC stereo

decoder

1 0000 The de-emphasis filter is bypassed. This

can be used for debugging or other

purposes.

Table 34. SOUNDSET_1 register (address 20h) bit description …continued

Legend: * = default value.

Bit Symbol Access Value Description

Table 35. SOUNDSET_2 register (address 21h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 - R/W 0* reserved, must be set to logic 0

6SSIF_AGC_TC R/W SSIF AGC time constant for L/L-accent standard

0* slow (normal)

1fast

5SSIF_AGC_CTRL R/W SSIF AGC control

0SSIF AGC off

1* SSIF AGC on

4HD_DK R/W When active, the internal FM mono sound demodulator can handle

excessive FM de vi a ti on s up to 40 0 kHz. This might happen in D/K standard

China. To activate this mode, it is mandatory to set D/K standard first. The

sound output level has to be adapted accordingly by the microprocessor to

avoid sound DAC clipping. E.g. for 400 kHz FM deviation, the −12 dB setting

of the sound level register (see Table 36) is recommended.

0* high Deviation mode off

1high Deviation mode on

Xdon’t care if SSIF output is chosen (SSIF_SND[1:0] = 10)

3FOR_MUTE R/W When active, the mono sound signal is always muted. This setting only

makes sense in case the sound DAC output is also set to mono so und

(SSIF_SND[1:0] = 01). FOR_MUTE has no function if SSIF_SN D[1:0] = 10.

0* off

1on

Xdon’t care if SSIF output is chosen (SSIF_SND[1:0] = 10)

Product data sheet Rev. 1 — 3 March 2011 38 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

[1] Before activating mono sound, the TV standard needs to be set via easy programming

2AUTO_MUTE R/W When active, the mono sound signal is muted if the horizon tal lock flag

(N_H_LOCK) disappears. This setting only makes sense in case the sound

DAC output is also set to mono sound (SSIF_SND[1:0] = 01). FOR_MUTE

has no function if SSIF_SND[1:0] =10.

0* off

1on

Xdon’t care if SSIF output is chosen (SSIF_SND[1:0] = 10)

1 and 0 SSIF_SND[1:0] R/W either mono sound or SSIF can be chosen for the sound DAC output

01 mono sound[1]

10* SSIF

Table 35. SOUNDSET_2 register (address 21h) bit description …continued

Legend: * = default value.

Bit Symbol Access Value Description

Table 36. SOUND_LEVEL register (address 22h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 to 5 -R/W 000* not used

4 to 0 SND_LVL[4:0] R/W mono sound output level

0 0001 −12 dB nominal; implemented for flexibility reasons. With this setting, the

adaptation to different standard requirements can be done.

0 0010 −6 dB nominal; implemented for flexibility reasons. With this setting, the

adaptation to different standard requirements can be done. It is chosen for FM

radio because of the large FM deviation involved.

0 0100 Nominal setting; FM deviations up to 100 kHz can be processed without sound

DAC clipping. The clipping level is 535 mV (RMS) typically.

0 1000* +6 dB nominal; chosen for M/N standard due to less nominal frequency

deviation

1 0000 +12 dB nominal; implemented for flexibility reasons. With this setting, the

adaptation to different standard requirements can be done.

X XXXX don’t care if SSIF output is chosen (SSIF_SND[1:0] = 10)

Product data sheet Rev. 1 — 3 March 2011 39 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

Remark: The SSIF level depends also on the used capacitor CS. Please refer to

Figure 14

Table 37. SSIF_LEVEL register (add ress 23h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 to 0 SSIF_LVL[7:0] R/W SSIF output level adjustment; SSIF AGC on

(21h[5] = 1)

1111 1111 +3 dB

: :

1010 1111* 0 dB

: :

0100 0000

0000 0000

−8.7 dB

SSIF output level adjustment; SSIF AGC off

(21h[5] = 0)

XXX0 0001 −12 dB nominal; implemented for flexibility

reasons. With this setting, the adaptation to

different standard requirements can be done.

XXX0 0010 −6 dB nominal; implemented for flexibility

reasons. With this setting, the adaptation to

different standard requirements can be done.

XXX0 0100 Nominal setting; typical output level is

55 mV (RMS) for PC / SC ratio of 13 dB

(see Section 12, SSIF/mono sound output).

XXX0 1000 +6 dB nominal; implemented for flexibility

reasons. With this setting, the adaptation to

different standard requirements can be done.

XXX1 0000 +12 dB nominal; implemented for flexibility

reasons. With this setting, the adaptation to

different standard requirements can be done.

XXXX XXXX don’t care if mono sound output is chosen

(SSIF_SND[1:0] = 01)

Product data sheet Rev. 1 — 3 March 2011 40 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

9.3.13 Status registers: ADC saturation, AFC, H/V PLL and AGC

(1) 150 pF

(2) 180 pF

(3) 220 pF (used for characteristics data)

(4) 270 pF

(5) 330 pF

Fig 14. TDA8296 SSIF character istic versus CS (refer to Figure 23) typical values;

termination 75 Ω and 1 kΩ in parallel

frequency (MHz)

4.5 6.56.05.55.0

001aam355

100

120

140

SSIFout

(mVrms)

(1)

(2)

(3)

(4)

(5)

Table 38. ADC_SAT register (address 24h) bit description

Bit Symbol Access Value Description

7 to 0 ADC_SAT[7:0] R - With ADC_SAT, the ADC saturation percentage in a

period of 40 ms can be calculated by the following

formula: .saturation ADC_SAT

256

------------------------- (%)=

Product data sheet Rev. 1 — 3 March 2011 41 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

[1] See Section 12 for nominal IF frequencies.

Table 39. AFC register (address 25h) bit description

Bit Symbol Access Value Description

7 to 0 AFC[7:0] R - This is the readout for AFC. AFC contains the

frequency deviation from nominal IF picture carrier.

The format is twos complement, 13.2 kHz steps are

done per LSB. See Table 40 for details. The frequency

deviation could also be given by the following formula:

. For a frequency

deviation from the nominal IF picture carrier greate r

than the FPLL pull-in capability (−830.6 kHz to

+843.8 kHz or −1 674.3 kHz to +1 687.5 kHz), the

output reading is undefined. The AFC lock ind ication

can be taken from the N_H_LOCK information from the

H-sync PLL. The lock occurs inside a frequency

window, which is determined by the pull-in capability of

the FPLL.

Table 40. Calculat ion of frequency deviation from AFC value

Deviation from nominal

IF frequency[1] AFC[7] AFC[6] AFC[5] AFC[4] AFC[3] AFC[2] AFC[1] AFC[0]

fIF = fnom − 1 674.3 kHz 01111111

fIF = fnom − 1 661.1 kHz 01111110

: ::::::::

fIF = fnom − 830.6 kHz 00111111

fIF = fnom − 817.4 kHz 00111110

: ::::::::

fIF = fnom − 13.2 kHz 00000001

fIF = fnom 00000000

fIF = fnom + 13.2 kHz 11111111

: ::::::::

fIF = fnom + 830.6 kHz 11000001

fIF = fnom + 843.8 kHz 11000000

: ::::::::

fIF = fnom + 1 674.3 kHz 10000001

fIF = fnom + 1 687.5 kHz 10000000

fIF fnom

–AFC–6 750×

512

---------------------------------- (kHz)=

Product data sheet Rev. 1 — 3 March 2011 42 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

(1) Undefined area in 1660 kHz mode

(2) Undefined area in 830 kHz mode

Fig 15. TDA8296 AFC characteristic

Table 41. HVPLL_STAT regi ster (address 26h) bit description

Bit Symbol Access Value Description

7 and 6 - R - not used

5NOISE_DET R - This flag gets HIGH in case the video S/N (weighted)

drops below 30 dB. For proper and noise free video

signals it stays LOW. It can be used for debugging an d

other purposes.

4MAC_DET R - This flag indicates the presence of copy-guarded video

content from STBs or VCRs. It can be used for

debugging and other purposes.

3FIDT R - This flag indicates the frame rate (50 Hz or 60 Hz).

When active, 60 Hz is detected. It can be used for

debugging and other purposes.

2V_LOCK R - This flag is active , if a proper frame (50 Hz or 60 Hz) is

detected. It can be used for debugg ing and other

purposes.

1F_H_LOCK R - This flag is active, if a proper H-sync (15.625 kHz or

15.734 kHz) is detected (Fast mode). It can be used for

debugging and other purposes.

0N_H_LOCK R - This flag is active, if a proper H-sync (15.625 kHz or

15.734 kHz) is detected (Normal mode). It can be used

for debugging and other purposes.

001aam356

Df (MHz)

−2000 200010000−1000

−50

150

AFC

reg val

−150

(1) (1)(2) (2)

±830 kHz PLL lock mode

±1660 kHz PLL lock mode

Product data sheet Rev. 1 — 3 March 2011 43 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

9.3.14 Chip identification and Standby mode

Table 42. D_IF_AGC_STAT register (address 27h) bit de scription

Bit Symbol Access Value Description

7 to 0 D_IF_AGC_STAT[7:0] R - D_IF_AGC_STAT is the digital IF AGC status

readout byte. Contains the digital IF AGC loop

DC information. The format is twos

complement. To get the internal gain in dB, the

following formula can be used:

Table 43. T_IF_AGC_STAT register (address 28h) bit description

Bit Symbol Access Value Description

7 to 0 T_IF_AGC_STAT[7:0] R - T_IF_AGC_STAT is the IF AGC status readout

byte. Contains the tuner IF AGC loop DC

information. The format is offset binary.

Table 44. ALT_FILT_COEF register (address 2Bh) bit description

Bit Symbol Access Value Description Frequency

7 to 2 not used R/W 0not used.

1 to 0 ALT_FILT_COEF R/W 00 internal selection of fixed

coefficients for video low

pass filter using an ADC

sampling frequency of

54.00 MHz

01 50.75 MHz

10 57.25 MHz

Table 45. SSIF_AGC_STAT register (address 2Dh) bit descript ion

Bit Symbol Access Value Description

7 to 0 SSIF_AGC_STAT[7:0] R - SSIF_AGC_STAT contains the SSIF AGC gain

information. To get the internal gain in dB, the

following formula can be used:

. The value is

approximately the PC / SC ratio.

gain D_IF_AGC_STAT 50+

3.675

-------------------------------------------------------- (dB)=

gain 20 SSIF_AGC_STAT

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

log=

Table 46. IDENTITY register (address 2Fh) bit description

Bit Symbol Access Value Description

7 to 0 IDENTITY[7:0] R1000 1100* chip identification, value corresponds to TDA8296

Table 47. CLB_STDBY register (address 30h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 to 3 -R/W 0000 0* not us ed

2 - R/W 0* reserved, must be set to logic 0

Product data sheet Rev. 1 — 3 March 2011 44 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

9.3.15 ADC control

In the TDA8296 a 12-bit ADC is implemented sampling with a 54 MHz clock (27 MHz

optional).

1STDBY R/W When STDBY is set to logic 1, the chip enters in Standby

mode, and its power consumption is reduced. The IF AGC pin

is set to high-ohmic. The default value is logic 0, which means

that the chip is active.

0* Normal mode

1Standby mode

0CLB R/W This signal clears the TDA8296 through the I2C-bus interface

(software reset). To activate the reset, just write CLB = 0. This

software reset will not affect the content of the registers.

0activate soft reset

1* normal operati on

Table 47. CLB_STDBY register (address 30h) bit description …continued

Legend: * = default value.

Bit Symbol Access Value Description

Table 48. ADC_CTL register (address 33h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 to 4 - R/W 0010* reserved, must be set to logic 0010

3DCIN R/W The input signal of the ADC can be either AC coupled by

means of two capacitors or connected directly to the inputs

(DC coupled).

0* AC coupling

1DC coupling

2 - R/W 1* reserved, must be set to logic 1

1SLEEP R/W When HIGH, SLEEP sets the ADC into its Sleep mode. Both

bias current and clock are switched off. In this mode, the

current consumption is reduced by a factor of 6. The

reference circuit will remain active in order to guarantee a fast

recovery from Sleep mode.

0* Normal mode

1ADC Sleep mode

0PD_ADC R/W When HIGH, PD_ADC sets the ADC into its Power-down

mode. All internal currents are switched off. In this mode, the

current consumption is near zero (leakage current only).

0* Normal mode

1ADC Power-down mode

Table 49. ADC_CTL_2 register (address 34h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 to 3 - R/W 0000 0* not used

2 and 1 - R/W 10* reserved, must be set to logic 10

Product data sheet Rev. 1 — 3 March 2011 45 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

9.3.16 Video and sound DAC control

The TDA8296 implements two 10-bit DAC modules (CVBS and sound output s) which are

sampled by a 108 MHz clock. A reference module derives biasing currents for the two

DACs.

0AD_SR54M R/W AD_SR54M sets the ADC sampling rate

0ADC sampling rate 27 MHz; first decimation filter is

bypassed

1* ADC sampling rate 54 MHz

(1) ADC sample rate 27 MHz

(2) ADC sample rate 54 MHz

ADC sample rate of 54 MHz recommended for optimum aliasing suppression. Internal low IF tilt in

54 MHz mode can be compensated by CVBS_EQ[7:0] set to −2 dB

Fig 16. Internal low IF frequency response in front of the VIF demodulator

Table 49. ADC_CTL_2 register (address 34h) bit description …continued

Legend: * = default value.

Bit Symbol Access Value Description

frequency (MHz)

01421210864

001aan682

-10

-5

-15

-20

(2)

(1)

amplitude

response

(dB)

Table 50. VIDEODAC_CTL reg ister (address 35h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 - R/W 0* reserved, must be set to logic 0

6 to 1 B_DA_V[5:0] R/W B_DA_V modifies between 50% to 100% the full scale

DAC output current. See Section 13.3.

00 0000 minimum current setting

11 1111* maximum current setting

0PD_DA_V R/W When HIGH, PD_DA_V sets the video DAC into its

Power-down mode.

0* Normal mode

1video DAC Power-down mode

Product data sheet Rev. 1 — 3 March 2011 46 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

9.3.17 Clock generation (PLL and crystal oscillator)

The TDA8296 implements a crystal oscillator which can be used either in Slave mode or

in Oscillator mode (see Section 13.7), and a multipurpose PLL which receives XIN as

input clock, and delivers the system clock of the IC (108 MHz).

The PLL output frequency (108 MHz) can be calculated with the following formula:

(1)

Table 51. AUDIODAC_CTL register (address 36h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 - R/W 0* reserved, must be set to logic 0

6 to 1 B_DA_S[5:0] R/W B_DA_S modifies between 50% to 100% the full scale

DAC output current. See Section 13.3.

00 0000* minimum current setting

11 1111 maximum current setting

0PD_DA_S R/W When HIGH, PD_DA_S sets the sound DAC into its

Power-down mode.

0* Normal mode

1sound DAC Power-down mode

Table 52. DAC_REF_CLK_CTL register (addres s 37h) bit descr iption

Legend: * = default value.

Bit Symbol Access Value Description

7 - R/W 0* not used

6 to 1 -R/W 10 0000* reserved, must be set to logic 10 0000

0PD_DA_REF R/W When HIGH, PD_DA_REF sets the reference module

into its Power-down mode.

0* Normal mode

1Power-down mode

Table 53. PLL_REG07, PLL_REG08, PLL_REG09 and PLL_REG10 register (address 3Fh to 42h) bit description

Legend: * = default value.

Address Register Bit Symbol Access Value Description

3Fh PLL_REG07 7 - R/W 0* not used

6NSEL7 R/W 0* It programs bit 7 of the N parameter (N = NSEL + 1). N is the

PLL pre-divider. See below for bits NSEL[6:0].

5 to 0 -R/W 00h* reserved, must be set to 00h

40h PLL_REG08 7 to 0 MSEL[7:0] R/W 1Ah* It programs the M parameter (M = MSEL + 1). M is the PLL

feedback-divider.

41h PLL_REG09 7 to 1 NSEL[6:0] R/W 01h* It programs bit s 6 to 0 of the N parameter (N = NSEL + 1).

N is the PLL pre-divider.

0 - R/W 0* reserved, must be set to logic 0

42h PLL_REG10 7 to 5 -R/W 000* reserved, must be set to logic 000

4 to 0 PSEL[4:0] R/W 01h* It programs the P parameter (P = PSEL + 1). P is the PLL

post-divider.

fclk(o)(PLL) fVCO

2P×

------------ fiM×

NP×

--------------==

Product data sheet Rev. 1 — 3 March 2011 47 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

For optimum perfor mances, the following relations must be respected:

•275 MHz ≤ fVCO ≤ 550 MHz

•4 kHz ≤ fi / N ≤ 150 MHz

9.3.18 GPIOs

In the TDA8296, three general purpose input/outputs are implemented.

Table 54. GPIOREG_0 register (address 44h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 to 4 GP1_CF[3:0] R/W It determines how the general purpose pin GPIO1 is

configured.

0000 The GPIO1 pin is in Input mode. Th e input value is

stored in GP1_VAL.

0001* The GPIO1 pin is in Open-drain mode. Th e output

value is determined by GP1_VAL.

0011 The GPIO1 pin is in Output mode. The PLL output

clock divided by two is delivered.

0100

1011

The GPIO1 pin is in Output mode. HVPLL signals are

delivered. The HVPLL signal is chosen according to

Table 56.

XXXX Don’t care if I2CSW_EN = 1. Then the pad is

configured as I2C-bus feed-through like described in

Table 55.

3 to 0 GP0_CF[3:0] R/W It determines how the general purpose pin GPIO0 is

configured.

0000 The GPIO0 pin is in Input mode. Th e input value is

stored in GP0_VAL.

0001 The GPIO0 pin is in Open-drain mode. Th e output

value is determined by GP0_VAL.

0011 The GPIO0 pin is in Output mode. The PLL output

clock divided by two is delivered.

0100

1011*

The GPIO0 pin is in Output mode. HVPLL signals are

delivered. The HVPLL signal is chosen according to

Table 56.

Table 55. GPIOREG_1 register (address 45h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7I2CSW_EN R/W 1* When I2CSW_EN = 1, GPIO1 and GPIO2 are

configured as an I2C-bus feed-through independently of

the GP1_CF and GP2_CF value. When

I2CSW_ON = 0, the feed-through switch is open, and

GPIO1 and GPIO2 are in 3-state. When the switch is

closed (I2CSW_ON = 1), the I2C-bus clock and data

signals (SCL and SDA) are available on the GPIO1 and

GPIO2 pins.

6I2CSW_ON R/W 0*

5 and 4 - R/W 00* not used

Product data sheet Rev. 1 — 3 March 2011 48 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

3 to 0 GP2_CF[3:0] R/W It determines how the general purpose pin GPIO2 is

configured.

0000 The GPIO2 pin is in Input mode. The input value is

stored in GP2_VAL.

0001* The GPIO2 pin is in Open-drain mode. The output

value is determined by GP2_VAL.

0011 The GPIO2 pin is in Output mode. The PLL output

clock divided by two is delivered.

0100

1011

The GPIO2 pin is in Output mode. HVPLL signals are

delivered. The HVPLL signal is chosen acco rding to

Table 56.

XXXX Don’t care if I2CSW_EN = 1. Then the pad is

configured as I2C-bus feed-through.

Table 56. HVPLL signal configuration

HVPLL_BUS bit Signal

GPx_CF[3:0] = 1011 V_SYNC

GPx_CF[3:0] = 1010 H_SYNC

GPx_CF[3:0] = 1001 NOISE_DET

GPx_CF[3:0] = 1000 MAC_DET

GPx_CF[3:0] = 0111 FIDT

GPx_CF[3:0] = 0110 V_LOCK

GPx_CF[3:0] = 0101 F_H_LOCK

GPx_CF[3:0] = 0100 N_H_LOCK

Table 57. GPIOREG_2 register (address 46h) bit description

Legend: * = default value.

Bit Symbol Access Value Description

7 to 5 -R/W 000* reserved, must be set to logic 000

4 and 3 -R/W 00* not used

2GP2_VAL R/W 1* GP2_VAL controls the value of the pin GPIO2 when

GP2_CF[3:0] = 0001. When GP2_CF[3:0] = 0000,

GPIO2 is an input pin which value can be read

through the I2C-bus stored in GP2_VAL.

1GP1_VAL R/W 1* GP1_VAL controls the value of the pin GPIO1 when

GP1_CF[3:0] = 0001. When GP1_CF[3:0] = 0000,

GPIO1 is an input pin which value can be read

through the I2C-bus stored in GP1_VAL.

0GP0_VAL R/W 1* GP0_VAL controls the value of the pin GPIO0 when

GP0_CF[3:0] = 0001. When GP0_CF[3:0] = 0000,

GPIO0 is an input pin which value can be read

through the I2C-bus stored in GP0_VAL.

Table 55. GPIOREG_1 register (address 45h) bit description …continued

Legend: * = default value.

Bit Symbol Access Value Description

Product data sheet Rev. 1 — 3 March 2011 49 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

9.3.19 Special equalizer functions for group delay and video (CVBS)

To realize special customer demands or accurate compensation of the tuner influence,

the TDA8296 has got freely programmable equalizers for the group delay and video

(CVBS) response.

In Table 58 the programming of the group delay equalizer is explained, in Table 60 the

programming of the video equalizer. For each equa lizer type an example is given.

[1] Don’t care if GD_EQ_CTRL = 0; see Table 23.

Remark: The group delay equalizer consists of four cascaded all-pass Infinite Impulse

Response (IIR) sections of second order (8th orde r in su m) . Th e tr an sfe r fu nc tio n H(z) of

one section is as follows, while the sampling rate is 13.5 MHz:

GD_EQ_SECTx_C1 and GD_EQ_SECTx_C2 (x = 1 to 4) are defining the linear and

square coefficient of each section, i.e. GD_EQ_SECTx_C1 = b1 and

GD_EQ_SECTx_C2 = b2. The coefficients are in signed fixed-point format, the

representation is in two’s complement. There is one sign bit, one magnitude bit and

6 fractional bits. Each fractional bit represents an inverse power of two, so that the highest

value for a coefficient is 20 + 2−1 + ... + 2−6 = 21 − 2−6 = 1.984375. The binary

representation for this value is 01.11 1111 (= 7Fh) and all bits except the sign bit are

logic 1. As two’s complement is chosen, the lowest value for a coefficient is −2, which is

10.00 0000 (= 80h) in the binary represent ation. So, for the lowest possible value, only the

sign bit is logic 1. The shown default value s fo r GD_ E Q _SEC T x_C1 and

GD_EQ_SECTx_C2 (x = 1 to 4) implement a flat equalizer response.

Example of Table 58: If e.g. a flat group delay response up to 4 MHz and −70 ns from

4.43 MHz to 5 MHz on the CVBS signal is wanted, one might realize a characteristic like

shown in Figure 17.

Table 58. GD_EQ_SECTx_C1 and GD_EQ_SECTx_C2 (x = 1 to 4) regis t er (address 4Bh to

52h) bit description

Legend: * = default value[1].

Address Register Bit Symbol Access Value

4Bh GD_EQ_SECT1_C1 7 to 0 GD_EQ_SECT1_C1[7:0] R/W 00h*

4Ch GD_EQ_SECT1_C2 7 to 0 GD_EQ_SECT1_C2[7:0] R/W 00h*

4Dh GD_EQ_SECT2_C1 7 to 0 GD_EQ_SECT2_C1[7:0] R/W 00h*

4Eh GD_EQ_SECT2_C2 7 to 0 GD_EQ_SECT2_C2[7:0] R/W 00h*

4Fh GD_EQ_SECT3_C1 7 to 0 GD_EQ_SECT3_C1[7:0] R/W 00h*

50h GD_EQ_SECT3_C2 7 to 0 GD_EQ_SECT3_C2[7:0] R/W 00h*

51h GD_EQ_SECT4_C1 7 to 0 GD_EQ_SECT4_C1[7:0] R/W 00h*

52h GD_EQ_SECT4_C2 7 to 0 GD_EQ_SECT4_C2[7:0] R/W 00h*

Hz() b2b1

+z1–z2–

+×

+z1–b2z2–

×+×

-----------------------------------------------------=

Product data sheet Rev. 1 — 3 March 2011 50 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

The coefficients used in the above filte r ar e ac co rd ing to Table 59. To get any other filter

characteristic use a professional filter tool to determine the coefficients.

Fig 17. Example for the prog ramma bl e grou p de la y equal izer

Table 59. Coefficients used in group delay equalizer example

Symbol Value

GD_EQ_SECT1_C1[7:0] B9h

GD_EQ_SECT1_C2[7:0] 16h

GD_EQ_SECT2_C1[7:0] DBh

GD_EQ_SECT2_C2[7:0] 17h

GD_EQ_SECT3_C1[7:0] 0Eh

GD_EQ_SECT3_C2[7:0] 19h

GD_EQ_SECT4_C1[7:0] 47h

GD_EQ_SECT4_C2[7:0] 1Ch

Table 60. CVBS_EQ_COEFx_LOW and CVBS_EQ_COEFx_HIGH (x = 0 to 5) register

(address 57h to 62h) bit description

Legend: * = default value[1].

Address Register Bit Symbol Access Value

57h CVBS_EQ_COEF0_LOW 7 to 0 CVBS_EQ_COEF0[7:0] R/W 00h*

58h CVBS_EQ_COEF0_HIGH 7 to 4 - R/W 0000*

3 to 0 CVBS_EQ_COEF0[11:8] R/W 0h*

59h CVBS_EQ_COEF1_LOW 7 to 0 CVBS_EQ_COEF1[7:0] R/W 00h*

5Ah CVBS_EQ_COEF1_HIGH 7 to 4 - R/W 0000*

3 to 0 CVBS_EQ_COEF1[11:8] R/W 0h*

5Bh CVBS_EQ_COEF2_LOW 7 to 0 CVBS_EQ_COEF2[7:0] R/W 00h*

5Ch CVBS_EQ_COEF2_HIGH 7 to 4 - R/W 0000*

3 to 0 CVBS_EQ_COEF2[11:8] R/W 0h*

5Dh CVBS_EQ_COEF3_LOW 7 to 0 CVBS_EQ_COEF3[7:0] R/W 00h*

f (MHz)

054231

001aaj779

0.59

0.56

0.62

0.65

td(grp)

(μs)

0.53

Product data sheet Rev. 1 — 3 March 2011 51 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

[1] Don’t care if CVBS_EQ_CTRL = 0; see Table 32.

Remark: The overall video (CVBS) equalizer is a symmetric FIR filter with 11 taps. Due to

the symmetry the group delay is constant (linear phase). The transfer function is as

follows, while the sampling rate is 13.5 MHz:

Please note that because of the symmetry h0 = h10, h1 = h9, h2 = h8, h3 = h7 and h4 = h6.

The mid coef ficient h5 is only present once. CVBS_EQ_COEFx (x = 0 to 5) are defin ing

the coefficients, i.e. CVBS_EQ_COEF0 = h0 = h10, CVBS_EQ_COEF1 = h1 = h9,

CVBS_EQ_COEF2 = h2 = h8, CVBS_EQ_COEF3 = h3 = h7,

CVBS_EQ_COEF4 = h4 = h6 and CVBS_EQ_COEF5 = h5. Each of the coefficients

h0 to h5 has got 12-bit quantization. The coefficients are in signed fixed-point format, the

representation is in two’s complement. There is one sign bit, one magnitude bit and

10 fractional bits. Each fra ctional bit represents an inverse power of two, so that the

highest value for a coefficient is 20 + 2−1 + ... + 2−10 = 21 − 2−10 = 1.9990234375. The

binary representation for this value is 01.11 1111 1111 (= 7FFh) and all bits except the

sign bit are logic 1. As two’s complement is chosen, the lowest value for a coefficient is

−2, which is 10.00 0000 0000 (= 80 0h) in the binary representation. So, for the lowest

possible value, only the sign bit is logic 1. The shown default values for

CVBS_EQ_COEFx (x = 0 to 5) implement a flat equalizer response.

Example of Table 60: If an attenuation of around 1 dB for video frequencies greater than

2 MHz is wanted, the following figure (see Figure 18) can be implemented.

5Eh CVBS_EQ_COEF3_HIGH 7 to 4 - R/W 0000*

3 to 0 CVBS_EQ_COEF3[11:8] R/W 0h*

5Fh CVBS_EQ_COEF4_LOW 7 to 0 CVBS_EQ_COEF4[7:0] R/W 00h*

60h CVBS_EQ_COEF4_HIGH 7 to 4 - R/W 0000*

3 to 0 CVBS_EQ_COEF4[11:8] R/W 0h*

61h CVBS_EQ_COEF5_LOW 7 to 0 CVBS_EQ_COEF5[7:0] R/W 00h*

62h CVBS_EQ_COEF5_HIGH 7 to 4 - R/W 0000*

3 to 0 CVBS_EQ_COEF5[11:8] R/W 4h*

Table 60. CVBS_EQ_COEFx_LOW and CVBS_EQ_COEFx_HIGH (x = 0 to 5) register

(address 57h to 62h) bit description …continued

Legend: * = default value[1].

Address Register Bit Symbol Access Value

Hz() h0h1z1–

×h2z2–h3z3–h4z4–... h10 z10–

×++×+×+×++=

Product data sheet Rev. 1 — 3 March 2011 52 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

Fig 18. Example for the prog ramma bl e video equalizer

Table 61. Coefficients used in video equalizer example

Symbol Value

CVBS_EQ_COEF0[11:0] 005h

CVBS_EQ_COEF1[11:0] FFDh

CVBS_EQ_COEF2[11:0] 016h

CVBS_EQ_COEF3[11:0] FFFh

CVBS_EQ_COEF4[11:0] 018h

CVBS_EQ_COEF5[11:0] 39Ch

f (MHz)

75164203

001aaj780

−1.2

−1.6

−0.4

−0.8

αresp(f)

(dB)

−2.0

Product data sheet Rev. 1 — 3 March 2011 53 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

10. Limiting values

[1] Stresses above the absolute maximum ratings may cause permanent damage to the device. Exposure to absolute maximum ratings

conditions for extended periods may affect device reliability.

[2] Tj depends on the assembly condition of the package and especially on the design of the PCB. The application mounting must be done

in such a way that the maximum junction temperature Tj(max) is never exceeded.

[3] No power sequence requirement

[4] Class IV according to EIA/JESD22-C101.

11. Thermal characteristics

The thermal resist ance depends str ongly on the natur e of the PCB use d in the applica tion

and on its design. The thermal resistance given in Table 63 corresponds to the value that

can be measured on a multilayer PCB (4 layer s) as defined by EIA/JESD51- 2. This value

is given for information only.

The junction temperature influences strongly the reliability of an IC. The PCB used in the

application contributes on a large part to the overall thermal characteristic. It must

therefore be designed to insure that the junction temperature of the IC never exceeds

Tj(max) = 125 °C at the maximum ambient temperature.

The IC has to be soldered to ground with its die-attached paddle. Plenty of vias are

recommen de d to rem ov e th e he at .

Table 62. Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134).[1][2][3]

Symbol Parameter Conditions Min Max Unit

VDDD(1V2) digital supply voltage (1.2 V) −0.5 +1.5 V

VDDDR(3V3) ring digital supply voltage (3.3 V) −0.5 +4.6 V

VDDA(ADC)(1V2) ADC analog supply voltage (1.2 V) −0.5 +1.5 V

VDDA(PLL)(1V2) PLL analog supply voltage (1.2 V) −0.5 +1.5 V

VDDA(DAC)(3V3) DAC analog supp ly voltage (3.3 V) −0.5 +4.6 V

Viinput voltage pins XIN, IF_POS and

IF_NEG −0.5 +1.3 V

digital input pins −0.5 +4.6 V

Tlead lead temperature -300 °C

Ptot total power dissipation Tamb = 85 °C - 0.5 W

Tstg storage temperature −40 +125 °C

Tjjunction temperature -+125 °C

Tamb ambient temperature −20 +85 °C

VESD electrostatic discharge voltage all pins:

Field ind. Charge Device

Model (FCDM) [4] -±1000 V

Human Body Model (HBM) -±4000 V

Table 63. Thermal characteris tics

Symbol Parameter Conditions Typ Unit

Rth(j-a) thermal resistance from junction to

ambient in still air 36.8 K/W

Product data sheet Rev. 1 — 3 March 2011 54 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

12. Characteristics

Table 64. Characteristics

Power supplies 3. 3 V, 1.2 V; Tamb = 25

C; PC/SC1 for L and M = 10 dB, all others 13 dB; nominal residual picture carrier of

3 % for L/L’ , 10 % for M, 10 % for B/G, 12.5 % for D/K, 20 % for I; FM/AM modulation = 54 %, 1 kHz modulation frequency;

measured in application PCB (see Figure 22 and Figure 23) with 16 MHz crystal frequency, terminated with 75

(CVBS) and

1 k

(SSIF/audio). Operation mode set via easy programming (Section 9.3.1), otherwise stated. Low IF input signal at -3dB

full scale, input frequencies as defined under row header IF input.

Symbol Parameter Conditions Min Typ Max Unit

Power supply

VDD(1V2) supply voltage (1.2 V) digital and analog 1.1 1.2 1.3 V

VDD(3V3) supply voltage (3.3 V) digital and analog 3.0 3.3 3.6 V

IDD(tot)(1V2) total supply current (1.2 V) -49 -mA

IDD(tot)(3V3) total supply current (3.3 V) -65 -mA

Ptot total power dissipation default se ttings; fs = 54 MHz

at ADC; DAC application in

accordan ce to Figure 23

-270 -mW

fs = 54 MHz at ADC; DAC

application in accordance to

Figure 24

-150 -mW

Standby mode - 5 8 mW

Digital I/Os

VIH HIGH-level input voltage all inputs (except pin XIN);

including voltage on outputs in

3-state mode

0.7 × VDD(3V3) -6.0 V

VIL LOW-level input voltage all inputs (except pin XIN);

including voltage on outputs in

3-state mode

- - 0.8 V

VOH HIGH-level output voltage source current 4 mA VDD(3V3) − 0.4 - - V

VOL LOW-level output voltage sink current 4 mA - - 0.4 V

Ciinput capacitance - - 5 pF

Master clock

fclk(o)(PLL) PLL output clock frequency [1] -108 -MHz

Δf/fclk relative frequency deviation

from clock frequency - - ±200 10−6

Reference frequency in Slave mode

fclk(ext) external clock frequency -16 -MHz

Vi(RMS) RMS input voltage AC coupled 200 250 -mV

SRrrising slew rate external clock 30 - - mV/ns

tjit(cc) cycle-to-cycle jitter time RMS value -12.5 -ps

Ciinput capacitance on pin XIN - 3 - pF

Product data sheet Rev. 1 — 3 March 2011 55 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

Reference frequency in Oscillator mode (with a crystal)

fxtal crystal frequency -16 -MHz

Δfxtal/fxtal relative crystal frequency

variation temperature, ageing and

spreading - - ±200 10−6

IF input

Vi(p-p) peak-to-peak inp ut voltage for full-scale ADC input

(0 dBFS) 0.7 0.8 0.9 V

Ri(dif) differential input resistance 10 15 - kΩ

Ci(dif) differential input

capacitance - 2 3 pF

Viinput voltage operational input related to

ADC full scale; all standards;

sum of all signals

−3−3−3dBFS

fiinput frequency PC / SC1

M/N standard -5.40 / 0.90 -MHz

B standard -6.40 / 0.90 -MHz

G/H standard -6.75 / 1.25 -MHz

I standard -7.25 / 1.25 -MHz

D/K standard -6.85 / 0.35 -MHz

L standard -6.75 / 0.25 -MHz

L-accent standard -1.25 / 7.75 -MHz

FM radio -1.25 -MHz

IF selectivity

αsup(stpb) stop-band suppression Hilbert filter stop-band −60 - - dB

decimation filter stop-band −40 - - dB

notch for NSC (NPC for

L-accent standard) [2] −40 - - dB

Carrier recovery FPLL

B−3dB(cl) closed-loop −3 dB

bandwidth ultrawide -280 -kHz

superwide -130 -kHz

wide -60 -kHz

medium -30 -kHz

narrow -15 -kHz

Δfpullin pull-in frequency range [3] -±830 -kHz

mover(PC) picture carrier over

modulation index black for L/L-accent standard;

flat field white else 115 117 - %

fstep(AFC) AFC step frequen cy 128 steps [3] 13 - - kHz

Table 64. Characteristics …continued

Power supplies 3. 3 V, 1.2 V; Tamb = 2 5

C; PC/SC1 for L and M = 10 dB, all others 13 dB; nominal residual picture carrier of

3 % for L/L’ , 10 % for M, 10 % for B/G, 12.5 % for D/K, 20 % for I; FM/AM modulation = 54 %, 1 kHz modulation frequency;

measured in application PCB (see Figure 22 and Figure 23) with 16 MHz crystal frequency , terminated with 75

(CVBS) and

1 k

(SSIF/audio). Operation mode set via easy programming (Section 9.3.1), otherwise stated. Low IF input signal at -3dB

full scale, input frequencies as defined under row header IF input.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 1 — 3 March 2011 56 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

IF demodulation (video equalizer in Flat mode)

BT(tot) total transition bandwidth Nyquist filter; all standards - 1 - MHz

αsup(stpb) stop-band suppression Nyquist filter; all standards −60 - - dB

video low-pass filter (M/N,

B/G/H, I, D/K, L/L-accent

standard)

-−60 -dB

Bvideo(−1dB) −1 dB video bandwidth M/N standard -3.8 -MHz

B/G/H, I, D/K, L/L-accent

standard -4.8 -MHz

tripple(GDE) group delay equalizer ripple

time peak value for B/G/H half,

D/K half, I flat, M (FCC) full,

L/L-accent full standard

-20 40 ns

Digital IF AGC (internal loop)

B−3dB(cl) closed-loop −3 dB

bandwidth negative modulation (all

standards except L/L-accent) [4] 400 - - Hz

positive modulation

(L/L-accent standard) 0.2 - - Hz

tresp response time ±20 dB level change; video

settled within ±3 dB

negative modulation (all

standards except

L/L-accent)

- 3 - ms

positive modulation

(L/L-accent standard) -100 -ms

ΔGAGC AGC gain range −20 -+48 dB

Tuner IF AGC (external loop)

tresp response time at 60 dBμV (RMS) PC input;

±20 dB level change; video

settled within ±3 dB

[5]

with TDA1827x;

positive modulation - 3 000 -ms

with TDA1827x;

negative modulation -600 -ms

f−3dB(lpf) low-pass filter −3 dB

frequency IF AGC postfilter 0.9 1.0 1.1 kHz

Table 64. Characteristics …continued

Power supplies 3. 3 V, 1.2 V; Tamb = 2 5

C; PC/SC1 for L and M = 10 dB, all others 13 dB; nominal residual picture carrier of

3 % for L/L’ , 10 % for M, 10 % for B/G, 12.5 % for D/K, 20 % for I; FM/AM modulation = 54 %, 1 kHz modulation frequency;

measured in application PCB (see Figure 22 and Figure 23) with 16 MHz crystal frequency , terminated with 75

(CVBS) and

1 k

(SSIF/audio). Operation mode set via easy programming (Section 9.3.1), otherwise stated. Low IF input signal at -3dB

full scale, input frequencies as defined under row header IF input.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 1 — 3 March 2011 57 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

CVBS output

Vo(p-p) peak-to-peak output

voltage negative PC modulation (all

standards except L/L-accent);

75 Ω DC load; sync-white

modulation

65 % - 0.7 - V

nominal 0.9 1.0 1.1 V

115 % - 1.0 - V

positive PC modulation

(L/L-accent standard);

75 Ω DC load; sync-white

modulation

65 % - 0.7 - V

nominal 0.9 1.0 1.1 V

115 % - 1.0 - V

Bvideo(−3dB) −3 dB video bandwidth overall video response; CVBS

equalizer flat

all standards except M/N 4.7 4.85 -MHz

M/N standard 3.8 3.9 -MHz

αresp(f) frequency response video equ alizer; 8 equally

spaced settings; value at

3.9 MHz

−5 - +4.5 dB

Gdif differential gain “ITU-T J.63 line 330” [6] -1.5 5 %

ϕdif differential phase “ITU-T J.63 line 330” -1.0 3deg

Vvideo/Vsync video voltage to sync

voltage ratio video DAC application

accordin g to Figure 23 1.9 2.33 3.0

Vsync synchronization voltage video DAC application

accordin g to Figure 23 160 200 240 mV

Vstlt/VCVBS(p-p) synchronization tilt voltage

to peak-to-peak CVBS

voltage ratio

- 1 2 %

Vftlt/VCVBS(p-p) frame tilt voltage to

peak-to-peak CVBS

voltage ratio

all standards except

L/L-accent - 1 3 %

L/L-accent standard in peak

white AGC detection - 1 5 %

ΔVtro/Vtro relative transient response

overshoot voltage variation 2T pulse [7] - 2 5 %

Table 64. Characteristics …continued

Power supplies 3. 3 V, 1.2 V; Tamb = 2 5

C; PC/SC1 for L and M = 10 dB, all others 13 dB; nominal residual picture carrier of

3 % for L/L’ , 10 % for M, 10 % for B/G, 12.5 % for D/K, 20 % for I; FM/AM modulation = 54 %, 1 kHz modulation frequency;

measured in application PCB (see Figure 22 and Figure 23) with 16 MHz crystal frequency , terminated with 75

(CVBS) and

1 k

(SSIF/audio). Operation mode set via easy programming (Section 9.3.1), otherwise stated. Low IF input signal at -3dB

full scale, input frequencies as defined under row header IF input.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 1 — 3 March 2011 58 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

αIM(blue) intermodulation

suppression (blue) carrier levels related to PC

sync; PC = −3.2 dB;

CC = −19.2 dB; SC = −13 dB

1.1 MHz (related to

black-to-white in RMS,

equals CC + 3.6 dB)

-67 -dB

3.3 MHz (related to CC) -77 -dB

αIM(yellow) intermodulation

suppression (yellow) carrier levels related to PC

sync; PC = −10 dB;

CC = −19.2 dB; SC = −13 dB

1.1 MHz (related to

black-to-white in RMS,

equals CC + 3.6 dB)

-70 -dB

3.3 MHz (related to CC) -78 -dB

(S/N)wweighted signal-to-noise

ratio all standards; unified

weighting filter (“ITU-T J.61”);

PC at −6 dBFS

57 60 -dB

PSRR power supply rejection ratio fripple = 70 Hz; 100 mV (p-p);

video signal: gray; level: 50 %;

TDA8296 stand alone; input

positive video modulation;

L standard; 1.2 V -39 -dB

positive video modulation;

L standard; 3.3 V [8] -47 -dB

negative video modulation;

B standard; 1.2 V -65 -dB

negative video modulation;

B standard; 3.3 V [8] -37 -dB

αsup(f)L(unw) unwanted leakage

frequency suppression 4.8 MHz video modulation;

related to black-to-white in

10 MHz to 200 MHz band,

wanted signal (peak-to-peak)

and unwanted signal (RMS)

-56 -dB

Table 64. Characteristics …continued

Power supplies 3. 3 V, 1.2 V; Tamb = 2 5

C; PC/SC1 for L and M = 10 dB, all others 13 dB; nominal residual picture carrier of

3 % for L/L’ , 10 % for M, 10 % for B/G, 12.5 % for D/K, 20 % for I; FM/AM modulation = 54 %, 1 kHz modulation frequency;

measured in application PCB (see Figure 22 and Figure 23) with 16 MHz crystal frequency , terminated with 75

(CVBS) and

1 k

(SSIF/audio). Operation mode set via easy programming (Section 9.3.1), otherwise stated. Low IF input signal at -3dB

full scale, input frequencies as defined under row header IF input.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 1 — 3 March 2011 59 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

SSIF/mono sound out put

fo(SSIF) SSIF output frequency SC1 or FM radio carrier [9]

M standard -4.5 -MHz

B/G/H standard -5.5 -MHz

I standard -6.0 -MHz

D/K/L/L-accent standard -6.5 -MHz

FM radio -5.5 -MHz

Vo(SSIF)(RMS) RMS SSIF output voltage 1 kΩ DC or AC load;

no modulation;

PC / SC1 = 13 dB;

Cs = 220 pF

M standard 105 120 135 mV

B standard 100 115 130 mV

G/H standard 100 115 130 mV

D/K standard 95 110 125 mV

I standard 100 115 130 mV

L standard 95 110 125 mV

L-accent standard 95 110 125 mV

FM radio (single carrier) 100 115 130 mV

Vo(AF)(RMS) RMS AF output voltage 1 kΩ DC or AC load; FM;

gain 0 dB

M standard; 54 %

modulation degree

(±13.5 kHz FM deviation

before pre-emphasis)

98 126 135 mV

B, G/H, I, D/K standard;

54 % modulation degree

(±27 kHz FM deviation

before pre-emphasis)

107 133 144 mV

L/L-accent standard; AM;

m = 54 %; gain +6 dB 158 176 196 mV

FM radio; 30 % modulation

degree (±22.5 kHz FM

deviation be fo re

pre-emphasis)

51 54 60 mV

high Deviation mode

(D/K standard China);

FM deviation before

pre-emphasis ±400 kHz;

sound level setting: −12 dB

[10] -425 -mV

Table 64. Characteristics …continued

Power supplies 3. 3 V, 1.2 V; Tamb = 2 5

C; PC/SC1 for L and M = 10 dB, all others 13 dB; nominal residual picture carrier of

3 % for L/L’ , 10 % for M, 10 % for B/G, 12.5 % for D/K, 20 % for I; FM/AM modulation = 54 %, 1 kHz modulation frequency;

measured in application PCB (see Figure 22 and Figure 23) with 16 MHz crystal frequency , terminated with 75

(CVBS) and

1 k

(SSIF/audio). Operation mode set via easy programming (Section 9.3.1), otherwise stated. Low IF input signal at -3dB

full scale, input frequencies as defined under row header IF input.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 1 — 3 March 2011 60 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

αhr(AF) AF headroo m before clipping; 1 kΩ DC or

AC load

M standard; related to

±25 kHz peak deviation

before pre-emphasis

- 7 - dB

B, G/H, I, D/K standard;

related to ±50 kHz peak

deviation be fo re

pre-emphasis

- 7 - dB

L/L-accent standard;

PC / SC1 ratio for start of

audio output clipping; AM;

m = 100 %; related to mean

SC1

- 9 - dB

FM radio; 30 % modulation

degree related to ±22.5 kHz

peak deviation before

pre-emphasis

- 9 - dB

τdeemp de-emphasis time constant M/N standard (mono);

FM radio USA -75 -μs

B/G/H, I, D/K standard;

FM radio Europe -50 -μs

B−3dB −3 dB bandwidth audio low-pass filter

L/L-accent standard -30 -kHz

M-BTSC standard -140 -kHz

THD total harmonic distortion F M ; for 50 kHz deviation

before pre-emphasis (25 kHz

for M standard)

-0.15 0.3 %

AM; m = 80 % - 0.5 1 %

BAF(−3dB) −3 dB AF bandwidth AM 20 27 -kHz

FM 40 50 -kHz

αAM AM suppression of FM demodulator;

AM: f = 1 kHz; m = 54 %

referenced to 27 kHz FM

deviation

40 51 -dB

Table 64. Characteristics …continued

Power supplies 3. 3 V, 1.2 V; Tamb = 2 5

C; PC/SC1 for L and M = 10 dB, all others 13 dB; nominal residual picture carrier of

3 % for L/L’ , 10 % for M, 10 % for B/G, 12.5 % for D/K, 20 % for I; FM/AM modulation = 54 %, 1 kHz modulation frequency;

measured in application PCB (see Figure 22 and Figure 23) with 16 MHz crystal frequency , terminated with 75

(CVBS) and

1 k

(SSIF/audio). Operation mode set via easy programming (Section 9.3.1), otherwise stated. Low IF input signal at -3dB

full scale, input frequencies as defined under row header IF input.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 1 — 3 March 2011 61 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

(S/N)w(AF)

AF weighted

signal-to-noise ratio via internal mono sound

demodulator;

“ITU-R BS.468-4”; FM mode

related to 27 kHz deviation

before pre-emphasis; 10 %

residual PC; SC1

black picture 52 54 -dB

flat field white picture 52 54 -dB

6 kHz sine wave picture 52 54 -dB

250 kHz square wave

picture 52 54 -dB

crosshatch picture 52 54 -dB

color bar picture 52 54 -dB

via internal mono sound

demodulator; (audio

gain +6 dB) “ITU-R BS.468-4”;

AM; m = 54 %; 3 % residual

PC; SC1

[11]

black picture 40 44 -dB

flat field white picture 41 44 -dB

color bar picture 40 44 -dB

via internal mono sound

demodulator;

“ITU-R BS.468-4”;

FM Radio mode;

22.5 kHz deviation

-45 -dB

Table 64. Characteristics …continued

Power supplies 3. 3 V, 1.2 V; Tamb = 2 5

C; PC/SC1 for L and M = 10 dB, all others 13 dB; nominal residual picture carrier of

3 % for L/L’ , 10 % for M, 10 % for B/G, 12.5 % for D/K, 20 % for I; FM/AM modulation = 54 %, 1 kHz modulation frequency;

measured in application PCB (see Figure 22 and Figure 23) with 16 MHz crystal frequency , terminated with 75

(CVBS) and

1 k

(SSIF/audio). Operation mode set via easy programming (Section 9.3.1), otherwise stated. Low IF input signal at -3dB

full scale, input frequencies as defined under row header IF input.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 1 — 3 March 2011 62 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

(S/N)w(SC1) first sound carrier weighted

signal-to-noise ratio via external SSIF sound

demodulator in Dual mode;

“ITU-R BS.468-4”; FM mode

related to 27 kHz deviation

before pre-emphasis; 10 %

residual PC

black picture -58 -dB

flat field white picture -57 -dB

6 kHz sine wave picture -57 -dB

250 kHz square wave

picture -58 -dB

crosshatch picture -52 -dB

color bar picture -58 -dB

via SSIF sound demodulator;

“ITU-R BS.468-4”; AM;

m = 54 %; 3 % residual PC

black picture -44 -dB

flat field white picture -44 -dB

color bar picture -44 -dB

(S/N)w(SC2) second sound carrier

weighted signal-to-noise

ratio

via external SSIF sound

demodulator in Dual mode;

“ITU-R BS.468-4”; FM mode

related to 27 kHz deviation

before pre-emphasis; 10 %

residual PC

black picture -56 -dB

flat field white picture -55 -dB

6 kHz sine wave picture -55 -dB

250 kHz square wave

picture -51 -dB

crosshatch picture -51 -dB

color bar picture -56 -dB

(S/N)wweighted signal-to-noise

ratio FM radio; via SSIF sound

demodulator in Mono mode;

“ITU-R BS.468-4”;

22.5 kHz deviation

-55 -dB

Table 64. Characteristics …continued

Power supplies 3. 3 V, 1.2 V; Tamb = 2 5

C; PC/SC1 for L and M = 10 dB, all others 13 dB; nominal residual picture carrier of

3 % for L/L’ , 10 % for M, 10 % for B/G, 12.5 % for D/K, 20 % for I; FM/AM modulation = 54 %, 1 kHz modulation frequency;

measured in application PCB (see Figure 22 and Figure 23) with 16 MHz crystal frequency , terminated with 75

(CVBS) and

1 k

(SSIF/audio). Operation mode set via easy programming (Section 9.3.1), otherwise stated. Low IF input signal at -3dB

full scale, input frequencies as defined under row header IF input.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 1 — 3 March 2011 63 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

[1] See Section 9.3.17 for PLL setting.

[2] Standard dependent located at 6.9 MHz, 7.9 MHz, 8.3 MHz and 9.25 MHz.

[3] The pull-in range can be doubled to ±1 660 kHz by I2C-bus register like described in Table 16. Then the AFC read-out has 256 steps.

[4] To counteract a fast IF level reduction, the digital IF AGC loop has a speed-up circuit for positive video modulation.

[5] In the ordinary system application, this slow response is counteracted by the fast digital IF AGC loop. ADC clipping is practically avoided

by fast-attack AGC characteristic.

[6] Graph differential gain versus temperature.

[7] HAD: 250 ns for M standard, 200 ns for others.

[8] The values given are measured with an IF AGC time constant of 5 Hz. For that, capacitor C7 in Figure 19 must be chosen 220 nF

instead of 2.2 nF. Doing so, the PSRR on 3.3 V together with the tuner can be improved.

[9] SC2 is not listed, but supported for all world standards.

[10] At high deviation mode at D/K standard, IF frequency has to be programmed, that SIF frequency is higher than 500 kHz

(default: 350 kHz).

[11] To set audio gain to +6 dB for internal sound demodulation, register 22h has to be programmed to 08h.

PSRR power supply rejection ratio fripple = 70 Hz; 100 mV (p-p);

video signal: gray; level: 50 %;

TDA8296 stand alone

FM sound; 1.2 V - 80 -dB

FM sound; 3.3 V [8] -39 -dB

AM sound; 1.2 V - 40 -dB

AM sound; 3.3 V [8] -38 -dB

αsup(f)L(unw) unwanted leakage

frequency suppression related to SSIF (SC1) in

10 MHz to 200 MHz band

wanted signal (peak-to-peak)

and unwanted signal (RMS)

-51 -dB

Table 64. Characteristics …continued

Power supplies 3. 3 V, 1.2 V; Tamb = 2 5

C; PC/SC1 for L and M = 10 dB, all others 13 dB; nominal residual picture carrier of

3 % for L/L’ , 10 % for M, 10 % for B/G, 12.5 % for D/K, 20 % for I; FM/AM modulation = 54 %, 1 kHz modulation frequency;

measured in application PCB (see Figure 22 and Figure 23) with 16 MHz crystal frequency , terminated with 75

(CVBS) and

1 k

(SSIF/audio). Operation mode set via easy programming (Section 9.3.1), otherwise stated. Low IF input signal at -3dB

full scale, input frequencies as defined under row header IF input.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 1 — 3 March 2011 64 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

13. Application information

13.1 Typical application

13.1.1 IF input application

(1) Input filter schematics see Figure 20 or Figure 21

Fig 19. Typical application of TDA8296

008aaa140

VSYNC

XIN RSET

SDA_O

SCL_O

SDA

SCL

processed

audio and video

TDA1827x

(TUNER IC)

AUDIO

AND

VIDEO

DECODER

TDA8296

IF_POS

IF_NEG

IF_AGC

S_IOUTN

V_IOUTN

V_IOUTP

S_IOUTP SSIF

CVBS

tuner IF AGC

(1)

reference frequency

V-sync

I2C-bus I2C-bus

Fig 20. IF input application for interlacing TDA1827x

Fig 21. IF input application

001aam37

47 Ω

82 Ω

VSSA(ADC)

IF_POS

IF_NEG

100 nF

47 Ω

100 nF

39 pF

39 pF TDA8296

001aan14

22 Ω

82 Ω

VSSA(ADC)

IF_POS

IF_NEG

100 nF

22 Ω

100 nF

22 nF

68 pF TDA8296

Product data sheet Rev. 1 — 3 March 2011 65 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

13.2 Detailed application diagrams

13.2.1 Main application diagram

(1) RRSET depends on application

(2) PCB layout dependent

(3) use of GPIO function not recommended

(4) for clock/oscillator application refer to Figure 32 and Figure 33

Fig 22. Main application diagram

001aam37

100 Ω

2.2 Ω

2.2 kΩ

10 Ω

1 Ω1 Ω

10 kΩ10 kΩ

10 Ω

150 kΩ

2.2 Ω

220 nF

(2)

(1)

(4)

(3) (3)

220 nF

100 nF

470 nF

100 pF

470 nF 470 nF

1TRST_N

IF_POS

GND

GND +3.3 V +3.3 V

GND

2SDA

IF_NEG

Low IF in

3SCL

VDDA(ADC)(1V2)

4TCK

VDDD1(1V2)

5VSSD2

VSSD1

6VDDD2(1V2)

i.c.

7TMS

VDDA(PLL)(1V2)

8TDI

XIN

+1.2 V

16 MHz

reference

input

GND

9TDO

XOUT

GND

V_IOUT

+3.3 V +3.3 V

S_IOUT Address

select

Address select

AddressPin 19Pin 20

84hGNDGND

86h+3.3 VGND

94hGND+3.3 V

96h+3.3 V+3.3 V

GND

RST_N +3.3 V

GND

+1.2 V

VSSA(PLL)

11 VSSA(ADC)

RSET

12 n.c.

VSSA(DAC)

13 i.c.

V_IOUTN

14 IF_AGC

IF_AGC

V_IOUTP

15 i.c.

VDDA(DAC1)(3V3)

16 VSSDR

S_IOUTN

17 VDDDR(3V3)

S_IOUTP

18 GPIO0/VSYNC

VDDA(DAC2)(3V3)

19 GPIO1/SCL_O

SADDR0

20 GPIO2/SDA_O

SADDR1

TDA8296

Product data sheet Rev. 1 — 3 March 2011 66 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

13.2.2 75 Ω application

This is the reference application for the data sheet characteristic.

13.2.3 100 Ω application

(1) For Cs value please refer to Figure 14, for characteristics Cs = 220 pF is used

Set value of B_DA_V[5:0] to 3Fh (part of register 0x35h) and value of B_DA_S[5:0] to 00h (part of

Fig 23. 75 Ω load

001aam372

1 kΩ75 Ω

ΩCs(1)

470

RSET

V_IOUTN

S_IOUTN

75 Ω

Cs(1)

S_IOUTP

V_IOUTP

11 13 16 17

CVBS Out

75 Ω terminated

SSIF Out

> 1 kΩ

terminate

TDA8296

Set value of B_DA_V[5:0] to 18h (part of register 0x35h) and value of B_DA_S[5:0] to 17h (part of

Fig 24. High ohmic load

001aam37

2 kΩ100 Ω

100 Ω150

100 Ω

180

RSET

V_IOUTN

S_IOUTN

100 Ω

150

S_IOUTP

V_IOUTP

11 13 16 17

CVBS Out

SSIF Out

TDA8296

Product data sheet Rev. 1 — 3 March 2011 67 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

13.2.4 Buffer application

13.2.5 Layout recommendations

Set value of B_DA_V[5:0] to 18h (part of register 0x35h) and value of B_DA_S[5:0] to 17h (part of register 0x36h)

Fig 25. Buffer app li ca tion with 75 Ω load

001aam37

33 Ω

2 kΩ100 Ω100

150

pF 33 Ω33 Ω

200 Ω

150 Ω

560 Ω

PBSS2515VS

PBSS4140U

CVBS

75 Ohm

(SCART)

+5 V

VIDEO

DECODER

68 Ω

220

150

47 μF

RSET

V_IOUTN

S_IOUTN

S_IOUTP

V_IOUTP

11 13 16 17

SSIF Out

TDA8296

100 nF

(1) Bottom layer

(2) Top layer

Fig 26. PCB p attern us ing circu it diagrams of Figure 20, Figure 22, Figure 23 an d 16 MHz

reference from XTAL

001aam882001aam882

SDA

SDA-T

SCL-T

IF-AGC

Low-IFp

Low-IFn

SCL

SIFp

CVBSp

470 pF

75 Ω

2.2 Ω

47 Ω

82 Ω

39 pF

2.2 Ω

10 Ω

100 Ω

470 pF

270 pF

75 Ω

270 pF

470 nF

1 nF

150 kΩ

4.7 kΩ

10 Ω

2.2 Ω

1.0 Ω

470 nF

470 nF 470 nF

18 pF 18 pF

16 MHz

n.c.

1.0 kΩ

TDA8296HN

18.00

75 Ω

(1)

(2)

Product data sheet Rev. 1 — 3 March 2011 68 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

13.3 DAC connection

The video and sound output signals are converted from IC internal digital domain to

analog output signal domain by digital controlled current sources. therefore the Digital to

Analog Conversion (DAC) is based on controlled current sources. the current sources of

the video and sound DACs are operating in differential mode. Even though differential

mode can be used, the typical application use case is single ended. Each output of the

differential pai r needs to be terminated by the same impedance to ground. The

termination impedance converts the DAC output current to signal voltage. The full scale

DAC current is defined by application resistor RRSET (connected between pin RSET and

ground). Typical values of RRSET are 1 kΩ and 2 kΩ. Additionally the full scale DAC

current can be adjusted between 50% and 100% via register 0x35h (bits B_DA_V[5:0])

and via register 0x36h (bits B_DA_S[5:0]).

The full scale current is a pplication dependent and ne eds to be matched to the termination

(output volt age is product of DAC cu rrent and ter mination impedan ce value). The nominal

peak-peak signal volt age should not exceed 1Vpp. The sum of AC an DC signal should not

exceed 1.5V single ended.

(1) Bottom layer

(2) Top layer

Fig 27. PCB p attern us ing circu it diagrams of Figure 20, Figure 22, Figure 23 an d 16 MHz

reference from master

001aan10

SDA-T

SCL-T

SDA

SCL

TDA8296HN

SIFp

CVBSp

IF-AGC

Low-IFp

Low-IFn

16 MHz-p

16 MHz-n

470 pF

75 Ω

2.2 Ω

10 Ω

220 Ω10 pF

100 pF

47 Ω

82 Ω

39 pF

100 Ω

470 pF

270 pF

75 Ω

270 pF

470 nF

1 nF

150 kΩ

4.7 kΩ

10 Ω

2.2 Ω

1.0 Ω

470 nF

470 nF 470 nF

470 nF

2.2 kΩ

100 nF

1.0 kΩ

75 Ω

(1)

(2)

Product data sheet Rev. 1 — 3 March 2011 69 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

The following relation gives the value of the full-scale current IFS in function of the bias

resistance value and value of B_DA_V[5:0] (part of register 0x35h) and value of

B_DA_S[5:0] (part of register 0x36h) (B_DA_V or B_DA_S):

(2)

0 ≤ B_DA_V/S ≤ 63

For programming of B_DA_V see Table 50, for B_DA_S see Table 51.

The DAC signal range used for CVBS and sound signal is reduced to provide headroom.

The signal headroom is shown in Figure 29 and Figure 30. The full scale DAC current

corresponds to digital input value of 1034. For the pins VIOUT_P and SIOUT_P the

corresponding signal shapes of CVBS and sound signal can be mapped linear to the full

scale DAC current. For the CVBS signal the sync level is fixed, the white level depends

also on register value CVBS_LVL[7:0]. For the sound signal the DC level is fixed.

(1) IV_IOUTP for RRSET = 1 kΩ

(2) IV_IOUTP for RRSET = 1.5 kΩ

(3) IV_IOUTP for RRSET = 2 kΩ

Fig 28. TDA8296 calculated DAC characteristic

IFS 1.216 VRSET

RRSET

------------------------------1

---

×64 B_DA_V/S+48

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

×64×=

DAC reg (dec)

030 7010 5040 6020

001aam357

DAC current

[mA]

(1)

(2)

(3)

Product data sheet Rev. 1 — 3 March 2011 70 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

Application hints for DAC supply: it is req uired to use de-coupling capacitors at

VDDA(DAC1)(3V3) and VDDA(DAC2)(3V3) supplies of > 100nF. A decoupling capacitor at pin

RSET is not allowed. The component RRSET should be placed close to the chip.

(1) Sync level

(2) White level (also dependent on CVBS_LVL[7:0] at address 1Eh)

Fig 29. Internal CVBS signal in front of video DAC (typical characteristic)

Fig 30. Internal SSIF signal in front of sound DAC (typical characteristic, also dependent

on SSIF_LVL[7:0] at address 23h )

time

120

(2)

(1)

150

1023

818

136

100 %

10 bit

DAC

input

relative

numbers

(%)

001aam628

time

100

1023

799

512

225

56 %

10 bit

DAC

input

relative

numbers

(%)

001aam629

Product data sheet Rev. 1 — 3 March 2011 71 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

13.4 ADC connection

The input signals of the ADC (IF_POS and IF_NEG) can be either AC coupled by means

of two capacitors or connected directly to the inputs (DC coupled). In case of AC coupling,

the DCIN bit (see Table 48) should be set to logic 0, which enables the internal resistive

dividers between VDDA(ADC)(1V2) and VSSD1 to take care of the cor re ct DC bia sin g of the

input signals.

In case the input signal is DC coupled, the input resistor network can be switched off by

setting the DCIN bit to logic 1. When using the ADC in this mode, the Common mode level

of the input signal should be at (0.5 / 1.2) × VDDA(ADC)(1V2) ± 200 mV.

Please note that during power-down the DC biasing network at the input will be switched

off in or der to reduce current consumption. During Sleep mode however the resistor

network will remain active.

13.5 Reset operation

13.5.1 Hardware reset

After a hardware reset, the registers are set to default (power-on reset values) according

to Table 9. M/N standard is the default standard.

13.5.2 Software reset

A software reset can be done each time something has been programmed. The software

reset does not af fect the content of th e register s but clears the flip-flops in the design. For

the activation of the software reset see Table 47 bit CLB.

13.6 Application hints

The DAC application can be ad apted to a wide range of application need s. The data sheet

describes 3 di fferent use cases as shown in Figure 23 to Figure 25.

The default application (also used for specification) is shown in Figure 23. This application

supports 75 Ω DC termination for the video CVBS and > 1 kΩ AC/DC termination for the

SSIF or mono audio sound signal. This application is e.g. preferred for device evaluation.

Fig 31. Hardware reset operation

008aaa14

TDA8296 normal operation

starts after 4 falling edges of XIN

the TDA8296 enters

immediately in its reset mode

XIN

minimum width at LOW is 4 × T

XIN

RST_N

XIN

Product data sheet Rev. 1 — 3 March 2011 72 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

In applications, where the impedance of the CVBS termination is high (e.g. >1 kΩ), which

is normally the case with audio/video processor, the video and sound DAC can operate

with significant lower current. An application proposal (which leads to reduced power

consumption) is shown in Figure 24.

For application requirements, where both, connections to audio/video processor (with

input impedance >1 kΩ) and 75 Ω termination (e.g. to SCART output), are needed in

parallel, a buffer application can be use d as sown in Figure 25).

13.7 Crystal connection

The typical crystal frequency value is 16 MHz. The values of the passive components

depend on crystal manufacturer. The oscillator can be set in two configurations depending

on the origin of the cryst al. Figure 32 describes the case of an crys tal shared with th e

tuner and the TDA8296 (Slave mode), Figure 33 the case of an crystal dedicated to the

TDA8296 (Oscillator mode).

In Oscillator mode, only a crystal and the load capacitances C1 and C2 need to be

connected externally since the feedback resist an ce is integrated on chip. For an accurate

time reference it is advised to use the load capacitors as specified in Table 65. CL is the

typical load capa citance of the cryst a l and is usua lly sp ecifie d by the crystal manufacturer.

Slave mode Oscillator mode

Fig 32. Reference clock application Fig 33. Oscillator application

Table 65. Crystal parameters together with external components

Fundamental

oscillation

frequency

Crysta l load

capacitance

CL(xtal) (pF)

Crystal series

resistance

Rs(xtal) (Ω)

External load capacitors

C1 (pF) C2 (pF)

1 MHz to 5 MHz 10 < 300 18 18

20 < 300 39 39

30 < 300 56 56

5 MHz to 10 MHz 10 < 300 18 18

20 < 200 39 39

30 < 100 56 56

008aaa14

XOUTXIN

n.c.clock signal

from tuner

Rbias

100 nF

TDA8296

008aaa14

XOUTXIN

GND GND

Rbias

C1 C2

XTAL

TDA8296

Product data sheet Rev. 1 — 3 March 2011 73 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

13.8 Alternative ADC sampling rates

In combination with a tuner front-end an alternative ADC sampling rates could be

necessary. Please refer to Table 66

The default register setting is adapted to 16 MHz reference frequency (either fr om crystal

or external source) and a nominal fADC = 54 MHz. In case of crosstalk of clock related

signals (e.g. n × 54 MHz) into the RF inpu t of connected tuner circuit, the potential

disturbance of the wanted TV channel can be avoided by switching to the alternative

ADC clock frequencies of 50.75 MHz or 57.25 MHz.

10 MHz to

15 MHz 10 < 160 18 18

20 < 60 39 39

15 MHz to

20 MHz 10 < 80 18 18

Table 65. Crystal parameters together with external components …continued

Fundamental

oscillation

frequency

Crysta l load

capacitance

CL(xtal) (pF)

Crystal series

resistance

Rs(xtal) (Ω)

External load capacitors

C1 (pF) C2 (pF)

Table 66. Alternative ADC clocks

Frequencies

ADC SR 50.75 MHz 54.00 MHz 57.25 MHz

Clock PLL 101.50 MHz 108.00 MHz 114.50 MHz

Xtal frequency 16.00 MHz 16.00 MHz 16.00 MHz

Divider

M203 27 229

N16 216

P 2 2 2

Registers

Product data sheet Rev. 1 — 3 March 2011 74 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

14. Test information

14.1 Boundary scan interface (“IEEE Std. 1149.1”)

The TDA8296 implement s a boundary scan architecture to allow access to, and control of,

board test support features within integrated circuits through a TAP. The TAP controller is

a synchronous state machine that controls the sequence of operations on the TAP

circuitry when the TMS signal ch anges. All st at e transitions occur on the basis of the TMS

value on the rising edge of TCK. The instruction r egister is a shift r egister based design. It

decodes the test to be performed and/or the test data register to be accessed. The

instructions are shifted into the register through the TDI and are latched as the curren t

instruction at the completion of the shifting process. The TDA8296 boundary scan

architecture includes: a TAP controller, a scannable instruction register and three

scannable test data registers: a boundary scan register, a device ID register, and a

bypass register.

The supported instructions are: EXTEST, IDCODE, SAMPLE, INTEST, CLAMP, HIGHZ

and BYPASS.

The boundary scan register is composed of 16 cells (see Table 67). Each cell is

associated either to an input pad, an output pad, a bidirectional pad or to the bidirectional

or 3-state command itself. All cells are of ‘observe and control’ type.

The device ID register is a 32-bit identificatio n register th at is included in the scan register

itself and contains the ID number. It is a fixed value that identifies the chip.

ID number structure is:

ID version [3:0] = 1h

ID part number [15:0] = 224C h

ID manufacturer [11:1] = 015h

ID mandatory [0] = 1h

IDCODE [31:0] = 1224 C02Bh

When the boundary scan function is not used, please connect the four dedicated input

pins (TRST_N, TCK, TDI and TMS) to GND.

Product data sheet Rev. 1 — 3 March 2011 75 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

Fig 34. Boundary scan block diag ram

Table 67. Boundary scan regis t er list

Pad signal Chain posi tion Pad type Scan type Control signal

IF_AGC [1] Bidir control/observe U1.vagc_cmd

[2] Ctrl control/observe U1.vagc_cmd

GPIO0 [3] Bidir control/observe U1.gpio0_cmd

[4] Ctrl control/observe U1.gpio0_cmd

GPIO1 [5] Bidir control/observe U1.gpio1_cmd

[6] Ctrl control/observe U1.gpio1_cmd

GPIO2 [7] Bidir control/observe U1.gpio2_cmd

[8] Ctrl control/observe U1.gpio2_cmd

SDA [9] Bidir control/observe U1.sda_cmd

[10] Ctrl control/observe U1.sda_cmd

SCL [11] input control/observe -

RST_N [12] input control/observe -

SADDR1 [13] Ctrl control/observe U1.saddr1_cmd

[14] Bidir control/observe U1.saddr1_cmd

SADDR0 [15] Ctrl control/observe U0.saddr1_cmd

[16] Bidir control/observe U0.saddr1_cmd

001aac078

BOUNDARY

SCAN

DEVICE ID

MUX

BYPASS

INSTRUCTION

DECODE

INSTRUCTION

TEST

ACCESS

PORT

CONTROLLER

control

TDO

TDI

TMS

TCK

TRST_N 3-state enable

select

Product data sheet Rev. 1 — 3 March 2011 76 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

Table 68. Boundary scan electrical characteristics

Symbol Parameter Conditions Min Typ Max Unit

Tcy cycle time TCK 25 - - ns

tsu set-up time TDI and TMS 0 - - ns

thhold time TDI and TMS 4 - - ns

td(TDO) delay time on pin TDO on 50 pF - - 12 ns

Fig 35. Boundary scan timing diagram

001aac07

TCK

TDI, TMS

TDO

Product data sheet Rev. 1 — 3 March 2011 77 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

15. Package outline

Fig 36. Package outline SOT618-1 (HVQFN40)

terminal 1

index area

0.51

A1Eh

UNIT ye

0.2

REFERENCES

OUTLINE

VERSION EUROPEAN

PROJECTION ISSUE DATE

IEC JEDEC JEITA

mm 6.1

5.9

4.25

3.95

6.1

5.9

4.25

3.95

4.5

0.30

0.18

0.05

0.00 0.05 0.1

DIMENSIONS (mm are the original dimensions)

SOT618-1 MO-220- - - - - -

0.5

0.3

0.1

0.05

0 2.5 5 mm

scale

SOT618

-1

VQFN40: plastic thermal enhanced very thin quad flat package; no leads;

0 terminals; body 6 x 6 x 0.85 mm

A(1)

max.

AA1c

detail X

y1C

11 20

40 31

01-08-08

02-10-22

terminal 1

index area

1/2 e

Note

1. Plastic or metal protrusions of 0.075 mm maximum per side are not included.

D(1) E(1)

Product data sheet Rev. 1 — 3 March 2011 78 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

16. Soldering of SMD packages

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”.

16.1 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 on e 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.

16.2 Wave and reflow soldering

W ave soldering is a joining te chnology in which the joints are m ade 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 solde r 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 ve rsus SnPb soldering

16.3 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. 1 — 3 March 2011 79 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

16.4 Reflow soldering

Key characteristics in reflow soldering are :

•Lead-free ve rsus SnPb soldering; note th at a lead-free reflow process usua lly leads to

higher minimum peak temperatures (see Figure 37) than a SnPb 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) an d cooling down. It is imperative that the peak

temperature is high enoug h for the solder to make reliable solder joint s (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 p ackage thickness and volume and is classified in accordance with

Table 69 and 70

Moisture sensitivity precautions, as indicated on the packing, must be respe cted at all

times.

Studies have shown that small packages reach higher tempera tures during reflow

soldering, see Figure 37.

Table 69. SnPb eutectic process (from J-STD-0 20C)

Package thickness (mm) Package reflow temperature (°C)

Volume (mm3)

< 350 ≥ 350

< 2.5 235 220

≥ 2.5 220 220

Table 70. Lead-free process (from J-STD-020C)

Package thickness (mm) Package reflow temperature (°C)

Volume (mm3)

< 350 350 to 2 000 > 2 000

< 1.6 260 260 260

1.6 to 2.5 260 250 245

> 2.5 250 245 245

Product data sheet Rev. 1 — 3 March 2011 80 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

For further informa tion on temperature profiles, refer to Application Note AN10365

“Surface mount reflow soldering description”.

17. Abbreviations

MSL: Moisture Sensitivity Level

Fig 37. Temperature profiles for large and small components

001aac84

temperature

time

minimum peak temperature

= minimum soldering temperature

maximum peak temperature

= MSL limit, damage level

peak

temperature

Table 71. Abbreviations

Acronym Description

ADC Analog-to-Digital Converter

AFC Automatic Frequency Control

AGC Automatic Gain Control

CC Color Carrier

CMOS Complementary Metal-Oxide Semiconductor

CORDIC COordinate Rotation DIgital Computer

CVBS Color Video Blanking Signal

DAC Digital-to-Analog Converter

DTO Digitally Tuned Oscillator

DVD Digital Versatile Disc

FIR Finite Impulse Response

FPLL Frequency Phase-Locke d Loop

FS Full Scale

GPIO General Purpose Input Output

H/V Horizontal and Vertical

HAD Half Amplitude Duration

IC Integrated Circuit

ID IDentification

IF Intermediate Frequency

Product data sheet Rev. 1 — 3 March 2011 81 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

18. Revision history

NPC Neighbor Picture Carrier

NSC Neighbor Sound Carrier

PC Picture Carrier

PCB Printed-Circuit Board

PLL Phase-Locked Loop

POR Power-On Reset

PWM Pulse Width Modulation

QSS Quasi Split Sound

SAW Surface Acoustic Wave

SC Sound Carrier

SCART Syndicat des Constructeurs d'Appareils Radiorécepteurs et Téléviseurs

Radio and Television Receiver Manufacturers' Association

SMD Surface Mounted Device

SSIF Second Sound Intermediate Frequency

TAP Test Access Port

VITS Vertical Interval Test Signal

Table 71. Abbreviations …continued

Acronym Description

Table 72. Revision history

Document ID Release date Data sheet status Change notice Supersedes

TDA8296 v.1 20110303 Product data sheet - -

Product data sheet Rev. 1 — 3 March 2011 82 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM 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 de vice(s) descr ibed in th is document m ay have cha nged since thi s document w as publish ed and may di ffe r 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 liab ility 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 tit le. A short data sh eet is intended

for quick reference only and shou ld not b e relied u pon to cont ain det ailed and

full information. For detailed and full information see the relevant full data

sheet, which is available on request via the local NXP Semicond uctors sales

office. In case of any inconsistency or conflict with the short data sheet, the

full data sheet shall pre va il.

Product specificat io n — The information and data provided in a Product

data sheet shall define the specification of the product as agreed between

NXP Semiconductors and its customer, unless NXP Semiconductors and

customer have explicitly agreed otherwise in writing. In no event however,

shall an agreement be valid in which the NXP Semiconductors product is

deemed to off er functions and qualities beyond those described in the

Product data sheet.

19.3 Disclaimers

Limited warr a nty and liability — Information in this document is believed to

be accurate and reliable. However, NXP Semiconductors does not give any

representations or warrant ies, 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.

In no event shall NXP Semiconductors be liable for any indirect, incidental,

punitive, special or consequ ential damages (including - wit hout limitation - lost

profits, lost savings, business interruption, costs related to the removal or

replacement of any products or rework charges) whether or not such

damages are based on tort (including negligence), warranty, breach of

contract or any other legal theory.

Notwithstanding any damages that customer might incur for any reason

whatsoever, NXP Semiconductors’ aggregate and cumulative liability t owards

customer for the products described herein shall be limited in accordance

with the Terms and conditions of commercial sale of NXP Semiconductors.

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 informa tion supplied prior

to the publication hereof .

Suitability for use — NXP Semiconductors products are not designed,

authorized or warranted to be suit able for use in life support, life-critical or

safety-critical systems or equipment, nor in applications where failure or

malfunction of an NXP Semiconductors product can reasonably be expected

to result in perso nal injury, death or seve re property or environmental

damage. NXP Semiconductors accepts no liab ility 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.

Customers are responsible for the design and ope ration of their applications

and products using NXP Semiconductors product s, and NXP Semiconductors

accepts no liability for any assistance with applications or cu stomer product

design. It is customer’s sole responsibility to determine whether the NXP

Semiconductors product is suit able and fit for the custome r’s applications and

products planned, as well as fo r the planned application and use of

customer’s third party customer(s). Custo mers should provide appropriate

design and operating safeguards to minimize the risks associated with their

applications and products.

NXP Semiconductors does not accept any liability related to any default,

damage, costs or problem which is based on any weakness or default in the

customer’s applications or products, or the application or use by customer’s

third party custo m er(s). Customer is responsible for doing all necessary

testing for the customer’s applications and products using NXP

Semiconductors products in order to avoid a default of the applications and

the products or of the application or use by customer’s third party

customer(s). NXP does not accept any liability in this respect.

Limiting values — Stress above one or more limiting values (as defined in

the Absolute Maximum Ratings System of IEC 60134) will cause permanent

damage to the device. Limiting values are stress ratings only and (proper)

operation of the device at these or any other conditions above those given in

the Recommended operating conditions section (if present) or the

Characteristics sections of this document is not warranted. Constant or

repeated exposure to limiting values will permanently and irreversibly affect

the quality and reliability of the device.

Terms and conditions of commercial sale — NXP Semicon ductors

products are sold subject to the general terms and conditions of commercial

sale, as published at http://www.nxp.com/profile/terms, unless otherwise

agreed in a valid written individua l agreement. In case an individual

agreement is concluded only the ter m s and conditions of the respective

agreement shall apply. NXP Semiconductors hereby expressly objects to

applying the customer’s general terms and conditions with regard to the

purchase of NXP Semiconductors products by customer.

No offer to sell or license — Nothing i n this document may be interpreted or

construed as an of fer t o sell product s that is open for accept ance or the gr ant,

conveyance or implication of any license under any copyrights, patents or

other industrial or inte llectual property rights.

Export control — This document as well as the item(s) described herein

may be subject to export control regulatio ns. Export might require a prior

authorization from national authorities.

Document status[1][2] Product status[3] Definition

Objective [short] data sheet Development This document contains dat a from the objective specification fo r product development.

Preliminary [short] dat a sheet Qualification This document contains data from the preliminary specification.

Product [short] dat a sheet Production This document contains the product specification.

Product data sheet Rev. 1 — 3 March 2011 83 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

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.

Non-automotive qualified products — Unless this data sheet expressly

states that this specific NXP Semiconductors product is automotive qualified,

the product is not suitable for automo tive use. It i s neither qua lified nor test ed

in accordance with automotive testing or application requirements. NXP

Semiconductors accepts no liability for inclusion and/or use of

non-automotive qualified products in automo tive equipment or applications.

In the event that customer uses the product for design-in and use in

automotive applications to automot ive specifications and standards, custome r

(a) shall use the product without NXP Semiconductors’ warranty of the

product for such au tomotive applications, use and specifications, and (b)

whenever customer uses the product for automotive applications beyond

NXP Semiconductors’ specifications such use shall be solely at customer’s

own risk, and (c) customer fully indemnifies NXP Semiconduct ors for an y

liability, damages or failed product claims resulting f rom customer design an d

use of the product for automotive applications beyond NXP Semiconductors’

standard warranty and NXP Semiconductors’ product specifications.

19.4 Trademarks

Notice: All referenced b rands, produc t names, service names and trademarks

are the property of their respective ow ners.

I2C-bus — logo is a trademark of NXP B.V.

Silicon Tuner — is a trademark of NXP B.V.

20. Contact information

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

Product data sheet Rev. 1 — 3 March 2011 84 of 87

continued >>

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

21. Tables

Table 1. Quick reference data . . . . . . . . . . . . . . . . . . . . .3

Table 2. Ordering information . . . . . . . . . . . . . . . . . . . . .5

Table 3. Pin allocation table . . . . . . . . . . . . . . . . . . . . . . .7

Table 4. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . .8

Table 5. Pin type description . . . . . . . . . . . . . . . . . . . . .10

Table 6. Address format. . . . . . . . . . . . . . . . . . . . . . . . .13

Table 7. I2C-bus transfer description . . . . . . . . . . . . . . .13

Table 8. I2C-bus transfer description . . . . . . . . . . . . . . .14

Table 9. I2C-bus register reference . . . . . . . . . . . . . . . .15

Table 10. I2C-bus registers . . . . . . . . . . . . . . . . . . . . . . .18

Table 11. STANDARD register (address 00h)

bit descripti on . . . . . . . . . . . . . . . . . . . . . . . . .23

Table 12. EASY_PROG register (address 01h)

bit descripti on . . . . . . . . . . . . . . . . . . . . . . . . .23

Table 13. Easy programming values . . . . . . . . . . . . . . . .24

Table 14. DIV_FUNC register (address 02h)

bit descripti on . . . . . . . . . . . . . . . . . . . . . . . . .25

Table 15. ADC_HEADR register (address 03h)

bit descripti on . . . . . . . . . . . . . . . . . . . . . . . . .25

Table 16. PC_PLL_FUNC register (address 04h)

bit descripti on . . . . . . . . . . . . . . . . . . . . . . . . .26

Table 17. DTO_PC_LOW, DTO_PC_MID and

DTO_PC_HIGH register

(address 09h to 0Bh) bit description . . . . . . . .26

Table 18. Values of DTO_PC per TV standard

at 54 MHz sampling frequency. . . . . . . . . . . . .27

Table 19. DTO_SC_LOW, DTO_SC_MID and

DTO_SC_HIGH register (address 0Ch to 0Eh)

bit descripti on . . . . . . . . . . . . . . . . . . . . . . . . .27

Table 20. Values for SSIF mode at 54 MHz sampling

frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Table 21. FILTERS_1 register (address 0Fh)

bit descripti on . . . . . . . . . . . . . . . . . . . . . . . . .28

Table 22. FILTERS_2 register (address 10h)

bit descripti on . . . . . . . . . . . . . . . . . . . . . . . . .30

Table 23. GRP_DELAY register (address 11h)

bit descripti on . . . . . . . . . . . . . . . . . . . . . . . . .31

Table 24. D_IF_AGC_SET_1 register (address 12h)

bit descripti on . . . . . . . . . . . . . . . . . . . . . . . . .32

Table 25. D_IF_AGC_SET_2 register (address 13h)

bit descripti on . . . . . . . . . . . . . . . . . . . . . . . . .32

Table 26. T_IF_AGC_SET register (address 15h)

bit descripti on . . . . . . . . . . . . . . . . . . . . . . . . .32

Table 27. T_IF_AGC_LIM register (address 16h)

bit descripti on . . . . . . . . . . . . . . . . . . . . . . . . .33

Table 28. T_IF_AGC_FORCE register (address 17h)

bit descripti on . . . . . . . . . . . . . . . . . . . . . . . . .33

Table 29. V_SYNC_DEL register (address 1Ch)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 30. CVBS_SET register (address 1Dh)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 31. CVBS_LEVEL register (address 1Eh)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 35

Table 32. CVBS_EQ register (address 1Fh)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 35

Table 33. SSIF_MUTE register (address 05h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 34. SOUNDSET_1 register (address 20h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 35. SOUNDSET_2 register (address 21h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 37

Table 36. SOUND_LEVEL register (address 22h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 38

Table 37. SSIF_LEVEL register (address 23h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 39

Table 38. ADC_SAT register (add ress 24h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 40

Table 39. AFC register (address 25h) bit description . . . 41

Table 40. Calculation of frequency deviation from AFC

value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Table 41. HVPLL_STAT register (address 26h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 42

Table 42. D_IF_AGC_STAT register (address 27h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 43

Table 43. T_IF_AGC_STAT register (address 28h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 43

Table 44. ALT_FILT_COEF register (address 2Bh)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 43

Table 45. SSIF_AGC_STAT register (address 2Dh)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 43

Table 46. IDENTITY register (address 2Fh)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 43

Table 47. CLB_STDBY register (address 30h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 43

Table 48. ADC_CTL register (address 33h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 44

Table 49. ADC_CTL_2 registe r (address 34h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 44

Table 50. VIDEODAC_CTL register (address 35h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 45

Table 51. AUDIODAC_CTL register (address 36h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . 46

Table 52. DAC_REF_CLK_C TL register

(address 37h) bit description . . . . . . . . . . . . . . 46

Table 53. PLL_REG07, PLL_R EG08, PLL_REG09

and PLL_REG10 register (address 3Fh to 42h)

Product data sheet Rev. 1 — 3 March 2011 85 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

bit descripti on . . . . . . . . . . . . . . . . . . . . . . . . .46

Table 54. GPIOREG_0 register (address 44h)

bit descripti on . . . . . . . . . . . . . . . . . . . . . . . . .47

Table 55. GPIOREG_1 register (address 45h)

bit descripti on . . . . . . . . . . . . . . . . . . . . . . . . .47

Table 56. HVPLL signal configuration . . . . . . . . . . . . . . .48

Table 57. GPIOREG_2 register (address 46h)

bit descripti on . . . . . . . . . . . . . . . . . . . . . . . . .48

Table 58. GD_EQ_SECTx_C1 and GD_EQ_SECTx_C2

(x = 1 to 4) register (address 4Bh to 52h)

bit description . . . . . . . . . . . . . . . . . . . . . . . . . .49

Table 59. Coefficients used in group delay equalizer

example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Table 60. CVBS_EQ_COEFx_LOW and

CVBS_EQ_COEFx_HIGH (x = 0 to 5) register

(address 57h to 62h) bit description . . . . . . . .50

Table 61. Coefficients used in video equalizer

example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Table 62. Limiting values . . . . . . . . . . . . . . . . . . . . . . . . .53

Table 63. Thermal characteristics . . . . . . . . . . . . . . . . . .53

Table 64. Characteristics . . . . . . . . . . . . . . . . . . . . . . . . .54

Table 65. Crystal parameters together with external

components . . . . . . . . . . . . . . . . . . . . . . . . . . .72

Table 66. Alternative ADC clocks. . . . . . . . . . . . . . . . . . .73

Table 67. Boundary scan register li st . . . . . . . . . . . . . . .75

Table 68. Boundary scan electrical characteristics . . . . .76

Table 69. SnPb eutectic process (from J-STD-020C) . . .79

Table 70. Lead-free process (from J-STD-020C) . . . . . .79

Table 71. Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . .80

Table 72. Revision history . . . . . . . . . . . . . . . . . . . . . . . .81

Product data sheet Rev. 1 — 3 March 2011 86 of 87

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM radio

22. Figures

Fig 1. Functional diagram of TDA8296 . . . . . . . . . . . . . .6

Fig 2. Pin configuration for HVQFN40 . . . . . . . . . . . . . . .7

Fig 3. I2C-bus Write mode . . . . . . . . . . . . . . . . . . . . . . .13

Fig 4. Examples I2C-bus Write mode. . . . . . . . . . . . . . .13

Fig 5. I2C-bus Read mode. . . . . . . . . . . . . . . . . . . . . . .14

Fig 6. Example I2C-bus Read mode . . . . . . . . . . . . . . .14

Fig 7. TDA8296 DTO_PC characteristic . . . . . . . . . . . .27

Fig 8. TDA8296 DTO_SC characteristic . . . . . . . . . . . .28

Fig 9. Video low-pass filters for sound carrier

suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Fig 10. Notch filter for adjacent sound carrier

suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Fig 11. Video low pass frequency response in

smooth roll off or low ripple mode . . . . . . . . . . . .30

Fig 12. SSIF and FM radio band-pass filters

(center frequency 5.5 MHz chosen). . . . . . . . . . .31

Fig 13. Video equalizer curves. . . . . . . . . . . . . . . . . . . . .36

Fig 14. TDA8296 SSIF characteristic versus CS

(refer to Figure 23) typical values; termination

75 Ω and 1 kΩ in parallel. . . . . . . . . . . . . . . . . . .40

Fig 15. TDA8296 AFC characteristic . . . . . . . . . . . . . . . .42

Fig 16. Internal low IF frequency respon se in front

of the VIF demodulator . . . . . . . . . . . . . . . . . . . .45

Fig 17. Example for the programmable group delay

equalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Fig 18. Example for the programmable video

equalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Fig 19. Typical application of TDA8296. . . . . . . . . . . . . .64

Fig 20. IF input application for interlacing TDA1827x . . .64

Fig 21. IF input application. . . . . . . . . . . . . . . . . . . . . . . .64

Fig 22. Main application diagram. . . . . . . . . . . . . . . . . . .65

Fig 23. 75 Ω load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

Fig 24. High ohmic load. . . . . . . . . . . . . . . . . . . . . . . . . .66

Fig 25. Buffer application with 75 Ω load. . . . . . . . . . . . .67

Fig 26. PCB pattern using circuit diagrams

of Figure 20, Figure 22, Figure 23 and 16 MHz

reference from XTAL . . . . . . . . . . . . . . . . . . . . . .67

Fig 27. PCB pattern using circuit diagrams

of Figure 20, Figure 22, Figure 23

and 16 MHz reference from master. . . . . . . . . . .68

Fig 28. TDA8296 calculated DAC chara c teristic . . . . . . .69

Fig 29. Internal CVBS signal in front of video DAC

(typical characteristic) . . . . . . . . . . . . . . . . . . . . .70

Fig 30. Internal SSIF signal in front of sound DAC

(typical characteristic, also dependent on

SSIF_LVL[7:0] at address 23h) . . . . . . . . . . . . . .70

Fig 31. Hardware reset operation . . . . . . . . . . . . . . . . . .71

Fig 32. Reference clock application. . . . . . . . . . . . . . . . .72

Fig 33. Oscillator application . . . . . . . . . . . . . . . . . . . . . .72

Fig 34. Boundary scan block diagram . . . . . . . . . . . . . . .75

Fig 35. Boundary scan timing diagram . . . . . . . . . . . . . .7 6

Fig 36. Package outline SOT618-1 (HVQFN40) . . . . . . .77

Fig 37. Temperature profiles for large and small

components . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 0

NXP Semiconductors TDA8296

Digital global standard low IF demodulator for analog TV and FM 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: 3 March 2011

Document identifier: TDA8296

Please be aware that important notices concerning this document and the product(s)

described herein, have been included in section ‘Legal information’.

23. Contents

1 General description. . . . . . . . . . . . . . . . . . . . . . 1

2 Features and benefits . . . . . . . . . . . . . . . . . . . . 1

3 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

4 Quick reference data . . . . . . . . . . . . . . . . . . . . . 3

5 Ordering information. . . . . . . . . . . . . . . . . . . . . 5

6 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 6

7 Pinning information. . . . . . . . . . . . . . . . . . . . . . 7

7.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

7.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 8

8 Functional description . . . . . . . . . . . . . . . . . . 10

8.1 IF ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

8.2 Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

8.3 PLL demodulator . . . . . . . . . . . . . . . . . . . . . . 10

8.4 Nyquist filter, video low-pass filter, video

and group delay equalizer, video leveling. . . . 10

8.5 Upsampler and video DAC. . . . . . . . . . . . . . . 11

8.6 SSIF/mono sound processing . . . . . . . . . . . . 11

8.7 Tuner IF AGC . . . . . . . . . . . . . . . . . . . . . . . . . 11

8.8 Digital IF AGC. . . . . . . . . . . . . . . . . . . . . . . . . 12

8.9 Clock generation. . . . . . . . . . . . . . . . . . . . . . . 12

9 I2C-bus control. . . . . . . . . . . . . . . . . . . . . . . . . 12

9.1 Protocol of the I2C-bus serial interface. . . . . . 12

9.1.1 Write mode. . . . . . . . . . . . . . . . . . . . . . . . . . . 13

9.1.2 Read mode. . . . . . . . . . . . . . . . . . . . . . . . . . . 14

9.2 Register overview. . . . . . . . . . . . . . . . . . . . . . 15

9.3 Register description . . . . . . . . . . . . . . . . . . . . 23

9.3.1 Standard setting with easy programming . . . . 23

9.3.2 Diverse functions (includes tuner IF AGC

Pin mode). . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

9.3.3 ADC headroom. . . . . . . . . . . . . . . . . . . . . . . . 25

9.3.4 Picture carrier PLL functions . . . . . . . . . . . . . 26

9.3.5 Picture and sound carrier DTO. . . . . . . . . . . . 26

9.3.6 Filter settings . . . . . . . . . . . . . . . . . . . . . . . . . 28

9.3.7 Group delay equalization . . . . . . . . . . . . . . . . 31

9.3.8 Digital IF AGC functions. . . . . . . . . . . . . . . . . 32

9.3.9 Tuner IF AGC functions . . . . . . . . . . . . . . . . . 32

9.3.10 V-sync adjustment . . . . . . . . . . . . . . . . . . . . . 34

9.3.11 CVBS settings . . . . . . . . . . . . . . . . . . . . . . . . 34

9.3.12 SSIF and mono sound settings . . . . . . . . . . . 36

9.3.13 Status registers: ADC saturation, AFC,

H/V PLL and AGC . . . . . . . . . . . . . . . . . . . . . 40

9.3.14 Chip ide ntification and Standby mode . . . . . . 43

9.3.15 ADC control . . . . . . . . . . . . . . . . . . . . . . . . . . 44

9.3.16 Video and sound DAC control . . . . . . . . . . . . 45

9.3.17 Clock genera tio n (PLL and crystal oscillator) . 46

9.3.18 GPIOs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

9.3.19 Special equalizer functions for group

delay and video (CVBS). . . . . . . . . . . . . . . . . 49

10 Limiting values . . . . . . . . . . . . . . . . . . . . . . . . 53

11 Thermal characteristics . . . . . . . . . . . . . . . . . 53

12 Characteristics . . . . . . . . . . . . . . . . . . . . . . . . 54

13 Application information . . . . . . . . . . . . . . . . . 64

13.1 Typical application . . . . . . . . . . . . . . . . . . . . . 64

13.1.1 IF input appl ication. . . . . . . . . . . . . . . . . . . . . 64

13.2 Detailed application diagrams . . . . . . . . . . . . 65

13.2.1 Main appl ication diagram. . . . . . . . . . . . . . . . 65

13.2.2 75 W application . . . . . . . . . . . . . . . . . . . . . . 66

13.2.3 100 W application . . . . . . . . . . . . . . . . . . . . . 66

13.2.4 Buffer application. . . . . . . . . . . . . . . . . . . . . . 67

13.2.5 Layout recommenda tions. . . . . . . . . . . . . . . . 67

13.3 DAC connection. . . . . . . . . . . . . . . . . . . . . . . 68

13.4 ADC connection. . . . . . . . . . . . . . . . . . . . . . . 71

13.5 Reset operation . . . . . . . . . . . . . . . . . . . . . . . 71

13.5.1 Hardware reset . . . . . . . . . . . . . . . . . . . . . . . 71

13.5.2 Software reset . . . . . . . . . . . . . . . . . . . . . . . . 71

13.6 Application hints. . . . . . . . . . . . . . . . . . . . . . . 71

13.7 Crystal connection . . . . . . . . . . . . . . . . . . . . . 72

13.8 Alternative ADC sampling rates. . . . . . . . . . . 73

14 Test information . . . . . . . . . . . . . . . . . . . . . . . 74

14.1 Boundary scan interface

(“IEEE Std. 1149.1”). . . . . . . . . . . . . . . . . . . . 74

15 Package outline. . . . . . . . . . . . . . . . . . . . . . . . 77

16 Soldering of SMD packages. . . . . . . . . . . . . . 78

16.1 Introduction to soldering. . . . . . . . . . . . . . . . . 78

16.2 Wave and reflow soldering. . . . . . . . . . . . . . . 78

16.3 Wave soldering . . . . . . . . . . . . . . . . . . . . . . . 78

16.4 Reflow soldering . . . . . . . . . . . . . . . . . . . . . . 79

17 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 80

18 Revision history . . . . . . . . . . . . . . . . . . . . . . . 81

19 Legal information . . . . . . . . . . . . . . . . . . . . . . 82

19.1 Data sheet status. . . . . . . . . . . . . . . . . . . . . . 82

19.2 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

19.3 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . 82

19.4 Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 83

20 Contact information . . . . . . . . . . . . . . . . . . . . 83

21 Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

22 Figures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

23 Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87