SRC4190(1)
192kHz Stereo Asynchronous
Sample Rate Converters
DESCRIPTION
The SRC4190 is an asynchronous sample rate converter
designed for professional and broadcast audio applications.
The SRC4190 combines a wide input-to-output sampling
ratio with outstanding dynamic range and low distortion.
Input and output serial ports support standard audio formats,
as well as a Time Division Multiplexed (TDM) mode. Flexible
audio interfaces allow the SRC4190 to connect to a wide
range of audio data converters, digital audio receivers and
transmitters, and digital signal processors.
The SRC4190 is a standalone pin-programmed device, with
control pins for mode, data format, mute, bypass, and low
group delay functions.
The SRC4190 may be operated from a single +3.3V power
supply. A separate digital I/O supply (VIO) operates over the
+1.65V to +3.6V supply range, allowing greater flexibility
when interfacing to current and future generation signal
processors and logic devices. The SRC4190 is available in
a SSOP-28 package.
FEATURES
●AUTOMATIC SENSING OF THE INPUT-TO-
OUTPUT SAMPLING RATIO
●WIDE INPUT-TO-OUTPUT SAMPLING RANGE:
16:1 to 1:16
●SUPPORTS INPUT AND OUTPUT SAMPLING
RATES UP TO 212kHz
●DYNAMIC RANGE: 128dB (–60dbFS input,
BW = 20Hz to fS/2, A-Weighted)
●THD+N: –125dB (0dbFS input, BW = 20Hz to
fS/2)
●ATTENUATES SAMPLING AND REFERENCE
CLOCK JITTER
●HIGH PERFORMANCE, LINEAR PHASE
DIGITAL FILTERING
●FLEXIBLE AUDIO SERIAL PORTS:
Master or Slave Mode Operation
Supports I2S, Left Justified, Right Justified, and
TDM Data Formats
Supports 16, 18, 20, or 24-Bit Audio Data
TDM Mode allows daisy chaining of up to eight
devices
●SUPPORTS 24-, 20-, 18-, or 16-BIT INPUT AND
OUTPUT DATA
All output data is dithered from the internal
28-Bit data path
●LOW GROUP DELAY OPTION FOR
INTERPOLATION FILTER
●SOFT MUTE FUNCTION
●BYPASS MODE
●POWER DOWN MODE
●OPERATES FROM A SINGLE +3.3 VOLT
POWER SUPPLY
●SMALL SSOP-28 PACKAGE
●PIN COMPATIBLE WITH THE SRC4192,
AD1895, AND AD1896(2)
APPLICATIONS
●DIGITAL MIXING CONSOLES
●DIGITAL AUDIO WORKSTATIONS
●AUDIO DISTRIBUTION SYSTEMS
●BROADCAST STUDIO EQUIPMENT
●HIGH-END A/V RECEIVERS
●GENERAL DIGITAL AUDIO PROCESSING
www.ti.com
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 2003-2007, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SBFS023B – JUNE 2003 – REVISED SEPTEMBER 2007
All trademarks are the property of their respective owners.
(1) U.S. Patent No. 7,262,716.
(2) Refer to the Applications Information section of this data sheet for details.
SRC4190
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Supply Voltage, VDD .......................................................... –0.3V to +4.0V
Supply Voltage, VIO ........................................................... –0.3V to +4.0V
Digital Input Voltage .......................................................... –0.3V to +4.0V
Operating Temperature Range ........................................–45°C to +85°C
Storage Temperature Range .........................................–65°C to +150°C
NOTE: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may de-
grade device reliability. These are stress ratings only, and functional opera-
tion of the device at these or any other conditions beyond those specified is
not implied.
PIN CONFIGURATION (SRC4190)
SPECIFIED
PACKAGE TEMPERATURE PACKAGE ORDERING TRANSPORT
PRODUCT PACKAGE-LEAD DESIGNATOR(1) RANGE MARKING NUMBER MEDIA, QUANTITY
SRC4190 SSOP-28 DB –45°C to +85°C SRC4190I SRC4190IDB Rails, 50
" """"SRC4190IDBR Tape and Reel, 2000
NOTE: (1) For the most current package and ordering information, see the Package Option Addendum at the end of this data sheet, or see the web site at www.ti.com.
PACKAGE/ORDERING INFORMATION
ABSOLUTE MAXIMUM RATINGS(1)
Top View
LGRP
RCKI
N.C.
SDIN
BCKI
LRCKI
V
IO
DGND
BYPAS
IFMT0
IFMT1
IFMT2
RST
MUTE
MODE2
MODE1
MODE0
BCKO
LRCKO
SDOUT
V
DD
DGND
TDMI
OFMT0
OFMT1
OWL0
OWL1
RDY
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SRC4190
PIN# NAME DESCRIPTION
1 LGRP Low Group Delay Control Input (Active High)
2 RCKI Reference Clock Input
3 N.C. No Connection
4 SDIN Audio Serial Data Input
5 BCKI Input Port Bit Clock I/O
6 LRCKI Input Port Left/Right Word Clock I/O
7V
IO Digital I/O Supply, +1.65V to VDD
8 DGND Digital Ground
9 BYPAS ASRC Bypass Control Input (Active High)
10 IFMT0 Input Port Data Format Control Input
11 IFMT1 Input Port Data Format Control Input
12 IFMT2 Input Port Data Format Control Input
13 RST Reset Input (Active Low)
14 MUTE Output Mute Control Input (Active High)
15 RDY ASRC Ready Status Output (Active Low)
16 OWL1 Output Port Data Word Length Control Input
17 OWL0 Output Port Data Word Length Control Input
18 OFMT1 Output Port Data Format Control Input
19 OFMT0 Output Port Data Format Control Input
20 TDMI TDM Data Input (Connect to DGND when not in use)
21 DGND Digital Ground
22 VDD Digital Core Supply, +3.3V
23 SDOUT Audio Serial Data Output
24 LRCKO Output Port Left/Right Word Clock I/O
25 BCKO Output Port Bit Clock I/O
26 MODE0 Serial Port Mode Control Input
27 MODE1 Serial Port Mode Control Input
28 MODE2 Serial Port Mode Control Input
PIN DESCRIPTIONS (SRC4190)
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instru-
ments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may be
more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.
SRC4190
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SRC4190
PARAMETER CONDITION MIN TYP MAX UNITS
DYNAMIC PERFORMANCE(1)
Resolution 24 Bits
Input Sampling Frequency fSIN 4 212 kHz
Output Sampling Frequency fSOUT 4 212 kHz
Input: Output Sampling Ratio
Upsampling 1:16
Downsampling 16:1
Dynamic Range BW = 20Hz to fSOUT/2, –60dBFS Input
fIN = 1kHz, Unweighted
(add 3dB to spec for A-weighted result)
44.1kHz:48kHz 125 dB
48kHz:44.1kHz 125 dB
48kHz:96kHz 125 dB
44.1kHz:192kHz 125 dB
96kHz:48kHz 125 dB
192kHz:12kHz 125 dB
192kHz:32kHz 125 dB
192kHz:48kHz 125 dB
32kHz:48kHz 125 dB
12kHz:192kHz 125 dB
Total Harmonic Distortion + Noise BW = 20Hz to fSOUT/2, 0dBFS Input
fIN = 1kHz, Unweighted
44.1kHz:48kHz –125 dB
48kHz:44.1kHz –125 dB
48kHz:96kHz –125 dB
44.1kHz:192kHz –125 dB
96kHz:48kHz –125 dB
192kHz:12kHz –125 dB
192kHz:32kHz –125 dB
192kHz:48kHz –125 dB
32kHz:48kHz –125 dB
12kHz:192kHz –125 dB
Interchannel Gain Mismatch 0dB
Interchannel Phase Deviation 0 Degrees
Mute Attenuation 24-Bit Word Length, A-weighted –128 dB
DIGITAL INTERPOLATION FILTER
CHARACTERISTICS
Passband 0.4535 x fSIN Hz
Passband Ripple ±0.007 dB
Transition Band 0.4535 x fSIN 0.5465 x fSIN Hz
Stop Band 0.5465 x fSIN Hz
Stop Band Attenuation –125 dB
Normal Group Delay (LGRP = 0) 102.53125/fSIN Seconds
Low Group Delay (LGRP = 1) 70.53125/fSIN Seconds
DIGITAL DECIMATION FILTER
CHARACTERISTICS
Passband 0.4535 x fSOUT Hz
Passband Ripple ±0.008 dB
Transition Band 0.4535 x fSOUT 0.5465 x fSOUT Hz
Stop Band 0.5465 x fSOUT Hz
Stop Band Attenuation –125 dB
Group Delay 36.46875/fSOUT Seconds
DIGITAL I/O CHARACTERISTICS
High-Level Input Voltage VIH 0.7 x VIO VIO V
Low Level Input Voltage VIL 0 0.3 x VIO V
High-Level Input Current IIH 0.5 10 µA
Low-Level Input Current IIL 0.5 10 µA
High-Level Output Voltage VOH IO = –4mA 0.8 x VIO VIO V
Low-Level Output Voltage VOL IO = +4mA 0 0.2 x VIO V
Input Capacitance CIN 3pF
ELECTRICAL CHARACTERISTICS
All parameters specified with TA = +25°C, VDD = +3.3V, and VIO = +3.3V, unless otherwise noted.
NOTES: (1) Dynamic performance measured with an Audio Precision System Two Cascade or Cascade Plus.
(2) fSMIN = min (fSIN, fSOUT).
(3) fSMAX = max (fSIN, fSOUT).
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SWITCHING CHARACTERISTICS
Reference Clock Timing
RCKI Frequency(2), (3) 128 x fSMIN 50 MHz
RCKI Period tRCKIP 20 1/(128 x fSMIN)ns
RCKI Pulsewidth High tRCKIH 0.4 x tRCKIP ns
RCKI Pulsewidth Low tRCKIL 0.4 x tRCKIP ns
Reset Timing
RST Pulse Width Low tRSTL 500 ns
Input Serial Port Timing
LRCKI to BCKI Setup Time tLRIS 10 ns
BCKI Pulsewidth High tSIH 10 ns
BCKI Pulsewidth Low tSIL 10 ns
SDIN Data Setup Time tLDIS 10 ns
SDIN Data Hold Time tLDIH 10 ns
Output Serial Port Timing
SDOUT Data Delay Time tDOPD 10 ns
SDOUT Data Hold Time tDOH 2ns
BCKO Pulsewidth High tSOH 10 ns
BCKO Pulsewidth Low tSOL 5ns
TDM Mode Timing
LRCKO Setup Time tLROS 10 ns
LRCKO Hold Time tLROH 10 ns
TDMI Data Setup Time tTDMS 10 ns
TDMI Data Hold Time tTDMH 10 ns
POWER SUPPLIES
Operating Voltage
VDD 3.0 +3.3 3.6 V
VIO 1.65 +3.3 3.6 V
Supply Current VDD = +3.3V, VIO = +3.3V
IDD, Power Down RST = 0, No Clocks 100 µA
IDD, Dynamic fSIN = fsOUT = 192kHz 66 mA
IIO, Power Down RST = 0, No Clocks 100 µA
IIO, Dynamic fSIN = fSOUT = 192kHz 2 mA
Total Power Dissipation VDD = +3.3V, VIO = +3.3V
PD, Power Down RST = 0, No Clocks 660 µW
PD, Dynamic fSIN = fSOUT = 192kHz 225 mW
ELECTRICAL CHARACTERISTICS (Cont.)
All parameters specified with TA = +25°C, V DD = +3.3V, and VIO = +3.3V, unless otherwise noted.
SRC4190
PARAMETER CONDITION MIN TYP MAX UNITS
NOTES: (1) Dynamic performance measured with an Audio Precision System Two Cascade or Cascade Plus.
(2) fSMIN = min (fSIN, fSOUT).
(3) fSMAX = max (fSIN, fSOUT).
SRC4190
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TYPICAL CHARACTERISTICS
At TA = +25°C, VDD = +3.3V, and VIO = +3.3V, unless otherwise noted.
0
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(12kHz:192kHz)
0 20k 40k 96k80k60k
Frequency (Hz)
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
dBFS
FFT with 1kHz INPUT TONE at –60dBFS
(12kHz:192kHz)
0 20k 40k 96k80k60k
Frequency (Hz)
0
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(32kHz:48kHz)
0 5k 10k 24k20k15k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at –60dBFS
(32kHz:48kHz)
0 5k 10k 24k20k15k
Frequency (Hz)
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
0
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(44.1kHz:48kHz)
0 5k 10k 24k20k15k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at –60dBFS
(44.1kHz:48kHz)
0 5k 10k 24k20k15k
Frequency (Hz)
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
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TYPICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VDD = +3.3V, and VIO = +3.3V, unless otherwise noted.
0
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(44.1kHz:96kHz)
0 10k 20k 48k40k30k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at –60dBFS
(44.1kHz:96kHz)
0 10k 20k 48k40k30k
Frequency (Hz)
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
0
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(44.1kHz:192kHz)
0 20k 40k 96k80k60k
Frequency (Hz)
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
dBFS
FFT with 1kHz INPUT TONE at –60dBFS
(44.1kHz:192kHz)
0 20k 40k 96k80k60k
Frequency (Hz)
0
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(48kHz:44.1kHz)
0 5k 10k 22k20k15k
Frequency (Hz)
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
dBFS
FFT with 1kHz INPUT TONE at –60dBFS
(48kHz:44.1kHz)
0 5k 10k 22k20k15k
Frequency (Hz)
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SBFS023B 7
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TYPICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VDD = +3.3V, and VIO = +3.3V, unless otherwise noted.
0
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(48kHz:96kHz)
0 10k 20k 48k40k30k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at –60dBFS
(48kHz:96kHz)
0 10k 20k 48k40k30k
Frequency (Hz)
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
0
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(48kHz:192kHz)
0 20k 40k 96k80k60k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at –60dBFS
(48kHz:192kHz)
0 20k 40k 96k80k60k
Frequency (Hz)
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
0
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(96kHz:44.1kHz)
0 5k 10k 22k20k15k
Frequency (Hz)
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
dBFS
FFT with 1kHz INPUT TONE at –60dBFS
(96kHz:44.1kHz)
0 5k 10k 22k20k15k
Frequency (Hz)
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SBFS023B
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TYPICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VDD = +3.3V, and VIO = +3.3V, unless otherwise noted.
0
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(96kHz:48kHz)
0 5k 10k 24k20k15k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at –60dBFS
(96kHz:48kHz)
0 5k 10k 24k20k15k
Frequency (Hz)
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
0
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(96kHz:192kHz)
0 20k 40k 96k80k60k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at –60dBFS
(96kHz:192kHz)
0 20k 40k 96k80k60k
Frequency (Hz)
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
0
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(192kHz:12kHz)
01k2k 6k5k3k 4k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at –60dBFS
(192kHz:12kHz)
01k2k 6k5k3k 4k
Frequency (Hz)
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
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TYPICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VDD = +3.3V, and VIO = +3.3V, unless otherwise noted.
0
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(192kHz:32kHz)
0 2.5k 5k
16k15k
12.5k7.5k 10k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at –60dBFS
(192kHz:12kHz)
Frequency (Hz)
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170 0 2.5k 5k
16k15k
12.5k7.5k 10k
0
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(192kHz:44.1kHz)
0 5k 10k 22k20k15k
Frequency (Hz)
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
dBFS
FFT with 1kHz INPUT TONE at –60dBFS
(192kHz:44.1kHz)
0 5k 10k 22k20k15k
Frequency (Hz)
–20
0
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(192kHz:48kHz)
0 5k 10k 24k20k15k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at –60dBFS
(192kHz:48kHz)
0 5k 10k 24k20k15k
Frequency (Hz)
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
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10 www.ti.com
TYPICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VDD = +3.3V, and VIO = +3.3V, unless otherwise noted.
0
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(192kHz:96kHz)
0 10k 20k 48k40k30k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at –60dBFS
(192kHz:96kHz)
0 10k 20k 48k40k30k
Frequency (Hz)
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
–20
0
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 20kHz INPUT TONE at 0dBFS
(44.1kHz:48kHz)
0 5k 10k 24k20k15k
Frequency (Hz)
0
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 20kHz INPUT TONE at 0dBFS
(48kHz:44.1kHz)
0 5k 10k 22k20k15k
Frequency (Hz)
0
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 20kHz INPUT TONE at 0dBFS
(48kHz:96kHz)
0 10k 20k 48k40k30k
Frequency (Hz)
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 20kHz INPUT TONE at 0dBFS
(96kHz:48kHz)
0 5k 10k 24k20k15k
Frequency (Hz)
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TYPICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VDD = +3.3V, and VIO = +3.3V, unless otherwise noted.
0
–20
–40
–60
–80
–100
–120
–140
–160
dBFS
FFT with 80kHz INPUT TONE at 0dBFS
(192kHz:192kHz)
0 20k 40k 96k80k60k
Frequency (Hz)
–100
–105
–110
–115
–120
–125
–130
–135
–140
–145
–150
Total Harmonic Distortion+Noise (dB)
THD+N vs INPUT AMPLITUDE f
IN
= 1kHz
(44.1kHz:48kHz)
–140 –120 –100 –80 0–20–60 –40
Input Amplitude (dBFS)
–100
–105
–110
–115
–120
–125
–130
–135
–140
–145
–150
Total Harmonic Distortion+Noise (dB)
THD+N vs INPUT AMPLITUDE f
IN
= 1kHz
(48kHz:44.1kHz)
–140 –120 –100 –80 0–20–60 –40
Input Amplitude (dBFS)
–100
–105
–110
–115
–120
–125
–130
–135
–140
–145
–150
Total Harmonic Distortion+Noise (dB)
THD+N vs INPUT AMPLITUDE f
IN
= 1kHz
(48kHz:96kHz)
–140 –120 –100 –80 0–20–60 –40
Input Amplitude (dBFS)
–100
–105
–110
–115
–120
–125
–130
–135
–140
–145
–150
Total Harmonic Distortion+Noise (dB)
THD+N vs INPUT AMPLITUDE f
IN
= 1kHz
(96kHz:48kHz)
–140 –120 –100 –80 0–20–60 –40
Input Amplitude (dBFS)
–100
–105
–110
–115
–120
–125
–130
–135
–140
–145
–150
Total Harmonic Distortion+Noise (dB)
THD+N vs INPUT AMPLITUDE fIN = 1kHz
(44.1kHz:192kHz)
–140 –120 –100 –80 0–20–60 –40
Input Amplitude (dBFS)
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TYPICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VDD = +3.3V, and VIO = +3.3V, unless otherwise noted.
–100
–105
–110
–115
–120
–125
–130
–135
–140
–145
–150
Total Harmonic Distortion+Noise (dB)
THD+N vs INPUT AMPLITUDE f
IN
= 1kHz
(192kHz:44.1kHz)
–140 –120 –100 –80 0–20–60 –40
Input Amplitude (dBFS)
–100
–105
–110
–115
–120
–125
–130
–135
–140
–145
–150
Total Harmonic Distortion+Noise (dB)
THD+N vs INPUT FREQUENCY WITH 0dBFS INPUT
(44.1kHz:48kHz)
0 5k 20k10k 15k
Input Frequency (Hz)
–100
–105
–110
–115
–120
–125
–130
–135
–140
–145
–150
Total Harmonic Distortion+Noise (dB)
THD+N vs INPUT FREQUENCY WITH 0dBFS INPUT = 1kHz
(48kHz:44.1kHz)
0 5k 20k10k 15k
Input Frequency (Hz)
–100
–105
–110
–115
–120
–125
–130
–135
–140
–145
–150
Total Harmonic Distortion+Noise (dB)
THD+N vs INPUT FREQUENCY WITH 0dBFS
(48kHz:96kHz)
0 5k 20k10k 15k
Input Frequency (Hz)
–100
–105
–110
–115
–120
–125
–130
–135
–140
–145
–150
Total Harmonic Distortion+Noise (dB)
THD+N vs INPUT FREQUENCY WITH 0dBFS
(96kHz:48kHz)
0 5k 20k10k 15k
Input Frequency (Hz)
–100
–105
–110
–115
–120
–125
–130
–135
–140
–145
–150
Total Harmonic Distortion+Noise (dB)
THD+N vs INPUT FREQUENCY WITH 0dBFS
(44.1kHz:192kHz)
0 5k 20k10k 15k
Input Frequency (Hz)
SRC4190
SBFS023B 13
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TYPICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VDD = +3.3V, and VIO = +3.3V, unless otherwise noted.
–100
–105
–110
–115
–120
–125
–130
–135
–140
–145
–150
Total Harmonic Distortion+Noise (dB)
THD+N vs INPUT FREQUENCY WITH 0dBFS
(192kHz:44.1kHz)
0 5k 20k10k 15k
Input Frequency (Hz)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
Output Amplitude (dBFS)
LINEARITY with f
IN
= 200Hz
(44.1kHz:48kHz)
–130 –120 –110 –100 –90 –80 –70 –60 –50 0–40 –30 –20 –10
Input Amplitude (dBFS)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
Output Amplitude (dBFS)
LINEARITY with f
IN
= 200Hz
(48kHz:44.1kHz)
–130 –120 –110 –100 –90 –80 –70 –60 –50 0–40 –30 –20 –10
Input Amplitude (dBFS)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
Output Amplitude (dBFS)
LINEARITY with f
IN
= 200Hz
(48kHz:96kHz)
–130 –120 –110 –100 –90 –80 –70 –60 –50 0–40 –30 –20 –10
Input Amplitude (dBFS)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
Output Amplitude (dBFS)
LINEARITY with f
IN
= 200Hz
(96kHz:48kHz)
–130 –120 –110 –100 –90 –80 –70 –60 –50 0–40 –30 –20 –10
Input Amplitude (dBFS)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
Output Amplitude (dBFS)
LINEARITY with f
IN
= 200Hz
(44.1kHz:192kHz)
–130 –120 –110 –100 –90 –80 –70 –60 –50 0–40 –30 –20 –10
Input Amplitude (dBFS)
SRC4190
SBFS023B
14 www.ti.com
TYPICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VDD = +3.3V, and VIO = +3.3V, unless otherwise noted.
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
Output Amplitude (dBFS)
LINEARITY with f
IN
= 200Hz
(192kHz:44.1kHz)
–130 –120 –110 –100 –90 –80 –70 –60 –50 0–40 –30 –20 –10
Input Amplitude (dBFS)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
dBFS
FREQUENCY RESPONSE with 0dBFS INPUT
0 10k 20k 30k 40k 60k50k
Frequency (Hz)
192kHz:32kHz 192kHz:48kHz
192kHz:96kHz
0
–0.01
–0.02
–0.03
–0.04
–0.05
–0.06
–0.07
–0.08
–0.09
–0.10
–0.11
–0.12
–0.13
–0.14
–0.15
(dBFS)
PASS BAND RIPPLE
(48k:48k)
0 5k 10k 15k 22k20k
Input Frequency (Hz)
0
–0.01
–0.02
–0.03
–0.04
–0.05
–0.06
–0.07
–0.08
–0.09
–0.10
–0.11
–0.12
–0.13
–0.14
–0.15
(dBFS)
PASS BAND RIPPLE
(192k:48k)
0 5k 10k 15k 22k20k
Input Frequency (Hz)
SRC4190
SBFS023B 15
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PRODUCT OVERVIEW
The SRC4190 is an asynchronous sample rate converter
(ASRC) designed for professional audio applications. Opera-
tion at input and output sampling frequencies up to 212kHz
is supported, with an input/output sampling ratio range of
16:1 to 1:16. Excellent dynamic range and Total Harmonic
Distortion + Noise (THD+N) are achieved by employing high
performance and linear phase digital filtering. Digital filtering
options allow for lower group delay processing.
The audio input and output ports support standard audio data
formats, as well as a TDM interface mode. Word lengths of
24-, 20-, 18-, and 16-bits are supported. Both ports may
operate in Slave mode, deriving their word and bit clocks
from external input and output devices. Alternatively, one
port may operate in Master mode while the other remains in
Slave mode. In Master mode, the LRCK and BCK clocks are
derived from the reference clock input, RCKI. The flexible
configuration of the input and output ports allows connection
to a wide variety of audio data converters, interface devices,
digital signal processors, and programmable logic.
A bypass mode is included, which allows audio data to be
passed directly from the input port to the output port, bypass-
ing the ASRC function. The bypass option is useful for
passing through encoded or compressed audio data, or non-
audio control or status data.
A soft mute function is available providing artifact-free opera-
tion while muting the audio output signal. The mute attenu-
ation is typically –128dB.
FUNCTIONAL BLOCK DIAGRAM
Figure 1 shows a functional block diagram of the SRC4190.
Audio data is received at the input port, clocked by either the
audio data source in Slave mode or by the SRC4190 in
Master mode. The output port data is clocked by either the
audio data source in Slave mode, or by the SRC4190 in
Master mode. The input data is passed through interpolation
filters which up-sample the data, which is then passed on to
the re-sampler. The rate estimator compares the input and
output sampling frequencies by comparing LRCKI, LRCKO,
and a reference clock. The results include an offset for the
FIFO pointer and the coefficients needed for re-sampling
function.
The output of the re-sampler is then passed on to the
decimation filter. The decimation filter performs down-sam-
pling and anti-alias filtering functions.
FIGURE 1. SRC4190 Functional Block Diagram.
MODE [2:0]
IFMT [2:0]
OFMT [1:0]
OWL [1:0]
MUTE
BYPAS
LGRP
RST
Control
Logic Rate
Estimator
LRCKI
LRCKO
REFCLK
RDY
LRCKO
BCKO
SDOUT
TDMI
Audio
Output
Port
RCKI REFCLK
Reference
Clock
LRCKI
BCKI
SDIN
Audio
Input
Port
Interpolation
Filters 16f
SIN
f
SIN
f
SOUT
V
DD
DGND
V
IO
DGND
Re-Sampler 16f
SOUT
Decimation
Filters
Power
SRC4190
SBFS023B
16 www.ti.com
MODE2 MODE1 MODE0 SERIAL PORT MODE
0 0 0 Both Input and Output Ports are Slave mode
0 0 1 Output Port is Master mode with RCKI = 128f
S
0 1 0 Output Port is Master mode with RCKI = 512f
S
0 1 1 Output Port is Master mode with RCKI = 256f
S
1 0 0 Both Input and Output Ports are Slave Mode
1 0 1 Input Port is Master mode with RCKI = 128f
S
1 1 0 Input Port is Master mode with RCKI = 512f
S
1 1 1 Input Port is Master mode with RCKI = 256f
S
TABLE 1. Setting the Serial Port Modes.
REFERENCE CLOCK
The SRC4190 requires a reference clock for operation. The
reference clock is applied at the RCKI input, pin 2. Figure 2
illustrates the reference clock connections and requirements
for the SRC4190. The reference clock may operate at 128fS,
256fS, or 512fS, where fS is the input or output sampling
frequency. The maximum external reference clock input
frequency is 50 MHz.
AUDIO PORT MODES
The SRC4190 supports seven serial port modes, which are
shown in Table 1. The audio port mode is selected using the
MODE0 (pin 26), MODE1 (pin 27), and MODE2 (pin 28)
inputs.
In Slave mode, the port LRCK and BCK clocks are config-
ured as inputs, and receive their clocks from an external
audio device. In Master mode, the LRCK and BCK clocks are
configured as outputs, being derived from the reference
clock input (RCKI). Only one port can be set to Master mode
at any given time, as indicated in Table 1.
RST
RCKI
t
RSTL
> 500ns
FIGURE 2. Reference Clock Input Connections and Timing
Requirements.
t
RCKIP
t
RCKIH
t
RCKIL
RCKI
SRC4190
RCKI
From External
Clock Source
50MHz max
2
t
RCKIP
> 20ns min
t
RCKIH
> 0.4 t
RCKIP
t
RCKIL
> 0.4 t
RCKIP
FIGURE 3. Reset Pulse Width Requirement.
RESET AND POWER DOWN OPERATION
The SRC4190 may be reset using the
RST
input (pin 13).
There is no internal power on reset, so the user should force
a reset sequence after power up in order to initialize the
device. In order to force a reset, the reference clock input
must be active, with an external clock source supplying a
valid reference clock signal (refer to Figure 2). The user must
assert
RST
low for a minimum of 500 nanoseconds and then
bring
RST
high again to force a reset. Figure 3 shows the
reset timing for the SRC4190.
The SRC4190 also supports a power-down mode. Power-
down mode may be set by holding the
RST
input low.
INPUT PORT OPERATION
The audio input port is a three-wire synchronous serial
interface that may operate in either Slave or Master mode.
The SDIN input (pin 4) is the serial audio data input. Audio
data is input at this pin in one of three standard audio data
formats: Philips I2S, Left Justified, or Right Justified. The
audio data word length may be up to 24 bits for I2S and Left
Justified formats, while the Right Justified format supports
16-, 18-, 20-, or 24-bit data. The data formats are shown in
Figure 4, while critical timing parameters are shown in Figure
5 and listed in the Electrical Characteristics table.
The bit clock is either an input or output at BCKI (pin 5). In
slave mode, BCKI is configured as an input pin, and may
operate at rates from 32fS to 128fS, with a minimum of one
clock cycle per data bit. In Master mode, BCKI operates at a
fixed rate of 64fS.
SRC4190
SBFS023B 17
www.ti.com
t
LRIS
t
SIH
t
LDIS
t
SIL
t
LDIH
LRCKI
BCKI
SDIN
Left Channel
(a) Left Justified Data Format
(b) Right Justified Data Format
Right Channel
LRCKO
BCKI
SDIN
MSB LSB LSBMSB
LRCKI
BCKI
SDIN
MSB MSB LSBLSB
(c) I
2
S Data Format
1/f
S
LRCKI
BCKI
SDIN
MSB LSB MSB LSB
FIGURE 4. Input Data Formats.
FIGURE 5. Input Port Timing.
The left/right word clock, LRCKI (pin 6), may be configured
as an input or output pin. In Slave mode, LRCKI is an input
pin, while in Master mode LRCKI is an output pin. In either
case, the clock rate is equal to fS, the input sampling
frequency. The LRCKI duty cycle is fixed to 50% for Master
mode operation.
Table 2 illustrates data format selection for the input port.
The IFMT0 (pin 10), IFMT1 (pin 11), and IFMT2 (pin 12)
inputs are utilized to set the input port data format.
IFMT2 IFMT1 IFMT0 INPUT PORT DATA FORMAT
0 0 0 24-Bit Left Justified
0 0 1 24-Bit I2S
0 1 0 Unused
0 1 1 Unused
1 0 0 16-Bit Right Justified
1 0 1 18-Bit Right Justified
1 1 0 20-Bit Right Justified
1 1 1 24-Bit Right Justified
TABLE 2. Input Port Data Format Selection.
SRC4190
SBFS023B
18 www.ti.com
OUTPUT PORT OPERATION
The audio output port is a four-wire synchronous serial
interface that may operate in either Slave or Master mode.
The SDOUT output (pin 23) is the serial audio data output.
Audio data is output at this pin in one of four data formats:
Philips I2S, Left Justified, Right Justified, or TDM. The audio
data word length may be 16-, 18-, 20-, or 24-bits. For all word
lengths, the data is triangular PDF dithered from the internal
28-bit data path. The data formats (with the exception of
TDM mode) are shown in Figure 6, while critical timing
parameters are shown in Figure 7 and listed in the Electrical
Characteristics table. The TDM format and timing are shown
in Figures 11 and 12, respectively, while examples of stan-
dard TDM configurations are shown in Figures 13 and 14.
The bit clock is either input or output at BCKO (pin 25). In
Slave mode, BCKO is configured as an input pin, and may
operate at rates from 32fS to 128fS, with a minimum of one
clock cycle for each data bit. The exception is the TDM
mode, where the BCKO must operate at N x 64fS, where N
is equal to the number of SRC4190 devices included on the
TDM interface. In Master mode, BCKO operates at a fixed
rate of 64fS for all data formats except TDM, where BCKO
operates at the reference clock (RCKI) frequency. Additional
information regarding TDM mode operation is included in the
Applications Information section of this data sheet.
The left/right word clock, LRCKO (pin 24), may be configured
as an input or output pin. In Slave mode, LRCKO is an input
pin, while in Master mode it is an output pin. In either case,
the clock rate is equal to fS, the output sampling frequency.
The clock duty cycle is fixed to 50% for I2S, Left Justified, and
Right Justified formats in Master mode. The LRCKO pulse
width is fixed to 32 BCKO cycles for the TDM format in
Master mode.
Left Channel
(a) Left Justified Data Format
(b) Right Justified Data Format
Right Channel
LRCKO
BCKO
SDOUT
MSB LSB LSBMSB
LRCKO
BCKO
SDOUT
MSB MSB LSBLSB
(c) I2S Data Format
1/fS
LRCKO
BCKO
SDOUT
MSB LSB MSB LSB
t
SOH
t
DOPD
t
SOL
t
DOH
LRCKO
BCKO
SDOUT
FIGURE 6. Output Data Formats.
FIGURE 7. Output Port Timing.
SRC4190
SBFS023B 19
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Table 3 illustrates data format selection for the output port.
The OFMT0 (pin 19), OFMT1 (pin 18), OWL0 (pin 17), and
OWL1 (pin 16) inputs are utilized to set the output port data
format and word length.
OFMT1 OFMT0 OUTPUT PORT DATA FORMAT
0 0 Left Justified
01 I
2S
1 0 TDM
1 1 Right Justified
OWL1 OWL0 OUTPUT PORT DATA WORD LENGTH
0 0 24 Bits
0 1 20 Bits
1 0 18 Bits
1 1 16 Bits
TABLE 3. Output Port Data Format Selection.
BYPASS MODE
The SRC4190 includes a bypass function, which routes the
input port data directly to the output port, bypassing the
ASRC function. Bypass mode may be invoked by forcing the
BYPAS input (pin 9) high. For normal ASRC operation, the
BYPAS pin should be set to 0.
No dithering is applied to the output data in bypass mode;
digital attenuation and mute functions are also unavailable in
this mode.
SOFT MUTE FUNCTION
The soft mute function of the SRC4190 may be invoked by
forcing the MUTE input (pin 14) high. The Soft mute function
slowly attenuates the output signal level down to all zeroes
plus ±4LSB of dither. This provides an artifact-free muting of
the audio output port.
READY OUTPUT
The SRC4190 includes an active low ready output named
RDY
(pin 15). This is an output from the rate estimator block,
which indicates that the input-to-output sampling frequency
ratio has been determined. The ready signal can be used as
a flag or indicator output. The ready signal can also be
connected to the active high MUTE input (pin 14) to provide
an auto-mute function, so that the output port is muted when
the rate estimator is in transition.
APPLICATIONS INFORMATION
This section of the data sheet provides practical applications
information for hardware and systems engineers who will be
designing the SRC4190 into their end equipment.
RECOMMENDED CIRCUIT CONFIGURATION
The typical connection diagram for the SRC4190 is shown in
Figure 8. Recommended values for power supply bypass
capacitors are included. These capacitors should be placed
as close to the IC package as possible.
LGRP
RCKI
NC
SDIN
BCKI
LRCKI
V
IO
DGND
BYPAS
IFMT0
IFMT1
IFMT2
RST
MUTE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SRC4190
Audio Input
Device
Reference
Clock
From/To
Control
Logic
V
DD
= +3.3V
10µF
MODE2
MODE1
MODE0
BCKO
LRCKO
SDOUT
V
DD
DGND
TDMI
OFMT0
OFMT1
OWL0
OWL1
RDY
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Audio Output
Device
0.1µF
To Pin 22
To Pin 21
V
IO
= +1.65V to V
DD
0.1µF10µF
To Pin 7
To Pin 8
From
Control
Logic
FIGURE 8. Typical Connection Diagram for the SRC4190.
SRC4190
SBFS023B
20 www.ti.com
INTERFACING TO DIGITAL AUDIO RECEIVERS
AND TRANSMITTERS
The SRC4190 input and output ports are designed to inter-
face to a variety of audio devices, including receivers
and transmitters commonly used for AES/EBU,
S/PDIF, and CP1201 communications.
Texas Instruments manufactures the DIR1703 digital audio
interface receiver and DIT4096/4192 digital audio transmit-
ters to address these applications.
Figure 9 illustrates interfacing the DIR1703 to the SRC4190
input port. The DIR1703 operates from a single +3.3V sup-
ply, which requires the VIO supply (pin 7) for the SRC4190 to
be set to +3.3V for interface compatibility.
Like the SRC4190 output port, the DIT4096 and DIT4192
audio serial port may be configured as a Master or Slave. In
cases where the SRC4190 output port is set to Master mode,
it is recommended to use the reference clock source (RCKI)
as the master clock source (MCLK) for the DIT4096/4192, to
ensure that the transmitter is synchronized to the SRC4190
output port data.
TDM APPLICATIONS
The SRC4190 supports a TDM output mode, which allows
multiple devices to be daisy-chained together to create a
serial frame. Each device occupies one sub-frame within a
frame, and each sub-frame carries two channels (Left fol-
lowed by Right). Each sub-frame is 64 bits long, with 32 bits
allotted for each channel. The audio data for each channel is
Left Justified within the allotted 32 bits. Figure 11 illustrates
the TDM frame format, while Figure 12 shows the TDM input
timing parameters, which are listed in the Electrical Charac-
teristics table of this data sheet.
DIR1703
LRCKO
BCKO
DATA
SCKO
LRCKI
BCKI
SDIN
SRC4190
RCLI
Clock
Select
Assumes V
IO
= +3.3V for SRC4190
Clock
Generator
RCV DIN
AES3, S/PDIF
Input
FIGURE 9. Interfacing the SRC4190 to the DIR1703 Digital
Audio Interface Receiver.
Figure 10 shows the interface between the SRC4190 output
port and the DIT4096 or DIT4192 audio serial port.
Once again, the VIO supplies for both the SRC4190 and
DIT4096/4192 are set to +3.3V for compatibility.
SRC4190
LRCKO
BCKO
SDOUT
RCKI
SYNC
SCLK
SDATA
DIT4096, DIT4192
MCLK
Clock
Select
Assumes V
IO
= +3.3V for SRC4190 and DIT4096, DIT4192
REF Clock
Generator
DIT Clock
Generator
TX+
TX–AES3, S/PDIF
OUTPUT
FIGURE 10. Interfacing the SRC4190 to the DIT4096/4192
Digital Audio Interface Transmitter.
LRCKO
BCKO
SDOUT
N = Number of Daisy-Chained Devices
One Sub-Frame contains 64 bits, with 32 bits per channel.
For each channel, the audio data is Left Justified, MSB first format, with the word length determined by the OWL[1:0] pins/bits.
Left Right
Sub-Frame 1 Sub-Frame 2 Sub-Frame N
One Frame = 1/fs
Left Right Left Right
FIGURE 11. TDM Frame Format.
SRC4190
SBFS023B 21
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The frame rate is equal to the output sampling frequency, fs.
The BCKO frequency for the TDM interface is N x 64fs, where
N is the number of devices included in the daisy chain. For
Master mode, the output BCKO frequency is fixed to the
reference clock (RCKI) input frequency. The number of
t
LROS
t
TDMS
t
LROH
t
TDMH
LRCKO
BCKO
TDMI
FIGURE 12. Input Timing for TDM Mode.
devices that can be daisy-chained in TDM mode is depen-
dent upon the output sampling frequency and the BCKO
frequency, leading to the following numerical relationship:
Number of Daisy-Chained Devices = (fBCKO / fs) / 64
Where:
fBCKO = Output Port Bit Clock (BCKO), 27.136 MHz maximum
fs = Output Port Sampling (or LRCKO) Frequency, 212kHz
maximum.
This relationship holds true for both Slave and Master modes.
Figures 13 and 14 show typical connection schemes for the
TDM mode. Although the TMS320C671x DSP family is
shown as the audio processing engine in these figures, other
TI digital signal processors with a multi-channel buffered
serial port (McBSPTM) may also function with this arrange-
ment. Interfacing to processors from other manufacturers is
also possible. Refer to Figure 7 in this data sheet, along with
the equivalent serial port timing diagrams shown in the DSP
data sheet, to determine compatibility.
TDMI
SRC4190
Slave #N
SDOUT
LRCKO
BCKO
RCKI
TDMI
SRC4190
Slave #2
SDOUT
LRCKO
BCKO
RCKI
TDMI
SRC4190
Slave #1
SDOUT
LRCKO
BCKO
RCKI
DRn
FSRn
CLKRn
CLKIN or CLKSn
TMS320C671x
McBSP
Clock
Generator
n = 0 or 1
TDMI
SRC4190
Master
SDOUT
LRCKO
BCKO
RCKI
TDMI
SRC4190
Slave #2
SDOUT
LRCKO
BCKO
RCKI
TDMI
SRC4190
Slave #1
SDOUT
LRCKO
BCKO
RCKI
DRn
FSRn
CLKRn
CLKIN or CLKSn
TMS320C671x
McBSP
Clock
Generator
n = 0 or 1
FIGURE 13. TDM Interface where all Devices are Slaves.
FIGURE 14. TDM Interface where one Device is Master to Multiple Slaves.
SRC4190
SBFS023B
22 www.ti.com
PIN COMPATIBILITY WITH THE ANALOG
DEVICES AD1895 AND AD1896
The SRC4190 is pin-and function-compatible with the AD1895
and AD1896 when observing the guidelines indicated in the
following paragraphs.
Power Supplies. To ensure compatibility, the VDD_IO and
VDD_CORE supplies of the AD1895 and AD1896 must be
set to +3.3V, while the VIO and VDD supplies of the SRC4190
must be set to +3.3V.
Pin 1 connection. For the AD1895, pin 1 is a no connect
(N.C.) pin. For the SRC4190, pin 1 functions as the low group
delay selection input, and should not be left unconnected.
Pin 1 must be connected to either digital ground or the VIO
supply, dependent upon the desired group delay.
Crystal Oscillator. The SRC4190 does not have an on-chip
crystal oscillator. An external reference clock is required at
the RCKI input (pin 2).
Reference Clock Frequency. The reference clock input
frequency for the SRC4190 must be no higher than 30 MHz,
in order to match the master clock frequency specification of
the AD1895 and AD1896. In addition, the SRC4190 does not
support the 768fS reference clock rate.
Master Mode Maximum Sampling Frequency. When the
input or output ports are set to Master mode, the maximum
sampling frequency must be limited to 96kHz in order to
support the AD1895 and AD1896 specification. This is de-
spite the fact that the SRC4190 supports a maximum sam-
pling frequency of 212kHz in Master mode. The user should
consider building an option into his or her design to support
the higher sampling frequency of the SRC4190.
Matched Phase Mode. Due to the internal architecture of
the SRC4190, it does not require or support the matched
phase mode of the AD1896. Given multiple SRC4190 de-
vices, if all reference clock (RCKI) inputs are driven from the
same clock source, the devices will be phase matched.
SRC4190
SBFS023B 23
www.ti.com
DATE REVISION PAGE SECTION DESCRIPTION
9/07 B 1 Front Page Added U.S. patent number to note (1).
Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
PACKAGING INFORMATION
Orderable Device Status (1) Package
Type Package
Drawing Pins Package
Qty Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
SRC4190IDB ACTIVE SSOP DB 28 50 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SRC4190IDBG4 ACTIVE SSOP DB 28 50 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SRC4190IDBR ACTIVE SSOP DB 28 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SRC4190IDBRG4 ACTIVE SSOP DB 28 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and
package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS
compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
PACKAGE OPTION ADDENDUM
www.ti.com 23-Sep-2008
Addendum-Page 1
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device Package
Type Package
Drawing Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0
(mm) B0
(mm) K0
(mm) P1
(mm) W
(mm) Pin1
Quadrant
SRC4190IDBR SSOP DB 28 2000 330.0 16.4 8.1 10.4 2.5 12.0 16.0 Q1
PACKAGE MATERIALS INFORMATION
www.ti.com 14-Jul-2012
Pack Materials-Page 1
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
SRC4190IDBR SSOP DB 28 2000 367.0 367.0 38.0
PACKAGE MATERIALS INFORMATION
www.ti.com 14-Jul-2012
Pack Materials-Page 2
MECHANICAL DATA
MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE
4040065 /E 12/01
28 PINS SHOWN
Gage Plane
8,20
7,40
0,55
0,95
0,25
38
12,90
12,30
28
10,50
24
8,50
Seating Plane
9,907,90
30
10,50
9,90
0,38
5,60
5,00
15
0,22
14
A
28
1
2016
6,50
6,50
14
0,05 MIN
5,905,90
DIM
A MAX
A MIN
PINS **
2,00 MAX
6,90
7,50
0,65 M
0,15
0°–ā8°
0,10
0,09
0,25
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion not to exceed 0,15.
D. Falls within JEDEC MO-150
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