Document Outline
- FEATURES
- APPLICATIONS
- DESCRIPTION
- ABSOLUTE MAXIMUM RATINGS(1)
- PACKAGE/ORDERING INFORMATION
- PIN CONFIGURATION (SRC4190)
- PIN DESCRIPTIONS (SRC4190)
- ELECTRICAL CHARACTERISTICS
- TYPICAL CHARACTERISTICS
- PRODUCT OVERVIEW
- FUNCTIONAL BLOCK DIAGRAM
- REFERENCE CLOCK
- RESET AND POWER DOWN OPERATION
- AUDIO PORT MODES
- INPUT PORT OPERATION
- OUTPUT PORT OPERATION
- BYPASS MODE
- SOFT MUTE FUNCTION
- READY OUTPUT
- APPLICATIONS INFORMATION
- RECOMMENDED CIRCUIT CONFIGURATION
- INTERFACING TO DIGITAL AUDIO RECEIVERS AND TRANSMITTERS
- TDM APPLICATIONS
- PIN COMPATIBILITY WITH THE ANALOG DEVICES AD1895 AND AD1896
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 (V
IO
) 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
q
AUTOMATIC SENSING OF THE INPUT-TO-
OUTPUT SAMPLING RATIO
q
WIDE INPUT-TO-OUTPUT SAMPLING RANGE:
16:1 to 1:16
q
SUPPORTS INPUT AND OUTPUT SAMPLING
RATES UP TO 212kHz
q
DYNAMIC RANGE: 128dB (60dbFS input,
BW = 20Hz to f
S
/2, A-Weighted)
q
THD+N: 125dB (0dbFS input, BW = 20Hz to
f
S
/2)
q
ATTENUATES SAMPLING AND REFERENCE
CLOCK JITTER
q
HIGH PERFORMANCE, LINEAR PHASE
DIGITAL FILTERING
q
FLEXIBLE AUDIO SERIAL PORTS:
Master or Slave Mode Operation
Supports I
2
S, 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
q
SUPPORTS 24-, 20-, 18-, or 16-BIT INPUT AND
OUTPUT DATA
All output data is dithered from the internal
28-Bit data path
q
LOW GROUP DELAY OPTION FOR
INTERPOLATION FILTER
q
SOFT MUTE FUNCTION
q
BYPASS MODE
q
POWER DOWN MODE
q
OPERATES FROM A SINGLE +3.3 VOLT
POWER SUPPLY
q
SMALL SSOP-28 PACKAGE
q
PIN COMPATIBLE WITH THE SRC4192,
AD1895, AND AD1896
(2)
APPLICATIONS
q
DIGITAL MIXING CONSOLES
q
DIGITAL AUDIO WORKSTATIONS
q
AUDIO DISTRIBUTION SYSTEMS
q
BROADCAST STUDIO EQUIPMENT
q
HIGH-END A/V RECEIVERS
q
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, 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.
SBFS023A JUNE REVISED JULY 2003
All trademarks are the property of their respective owners.
(1) Patents Pending.
(2) Refer to the Applications Information section of this data sheet for details.
SRC4190
SRC4190
SBFS023A
2
www.ti.com
Supply Voltage, V
DD
.......................................................... 0.3V to +4.0V
Supply Voltage, V
IO
........................................................... 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 specifications and package information, refer to our 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
7
V
IO
Digital I/O Supply, +1.65V to V
DD
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
V
DD
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
SBFS023A
3
www.ti.com
SRC4190
PARAMETER
CONDITION
MIN
TYP
MAX
UNITS
DYNAMIC PERFORMANCE
(1)
Resolution
24
Bits
Input Sampling Frequency
f
SIN
4
212
kHz
Output Sampling Frequency
f
SOUT
4
212
kHz
Input: Output Sampling Ratio
Upsampling
1:16
Downsampling
16:1
Dynamic Range
BW = 20Hz to f
SOUT
/2, 60dBFS Input
f
IN
= 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 f
SOUT
/2, 0dBFS Input
f
IN
= 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
0
dB
Interchannel Phase Deviation
0
Degrees
Mute Attenuation
24-Bit Word Length, A-weighted
128
dB
DIGITAL INTERPOLATION FILTER
CHARACTERISTICS
Passband
0.4535 x f
SIN
Hz
Passband Ripple
0.007
dB
Transition Band
0.4535 x f
SIN
0.5465 x f
SIN
Hz
Stop Band
0.5465 x f
SIN
Hz
Stop Band Attenuation
125
dB
Normal Group Delay (LGRP = 0)
102.53125/f
SIN
Seconds
Low Group Delay (LGRP = 1)
70.53125/f
SIN
Seconds
DIGITAL DECIMATION FILTER
CHARACTERISTICS
Passband
0.4535 x f
SOUT
Hz
Passband Ripple
0.008
dB
Transition Band
0.4535 x f
SOUT
0.5465 x f
SOUT
Hz
Stop Band
0.5465 x f
SOUT
Hz
Stop Band Attenuation
125
dB
Group Delay
36.46875/f
SOUT
Seconds
DIGITAL I/O CHARACTERISTICS
High-Level Input Voltage
V
IH
0.7 x V
IO
V
IO
V
Low Level Input Voltage
V
IL
0
0.3 x V
IO
V
High-Level Input Current
I
IH
0.5
10
A
Low-Level Input Current
I
IL
0.5
10
A
High-Level Output Voltage
V
OH
I
O
= 4mA
0.8 x V
IO
V
IO
V
Low-Level Output Voltage
V
OL
I
O
= +4mA
0
0.2 x V
IO
V
Input Capacitance
C
IN
3
pF
ELECTRICAL CHARACTERISTICS
All parameters specified with T
A
= +25
C, V
DD
= +3.3V, and V
IO
= +3.3V, unless otherwise noted.
NOTES: (1) Dynamic performance measured with an Audio Precision System Two Cascade or Cascade Plus.
(2) f
SMIN
= min (f
SIN
, f
SOUT
).
(3) f
SMAX
= max (f
SIN
, f
SOUT
).
SRC4190
SBFS023A
4
www.ti.com
SWITCHING CHARACTERISTICS
Reference Clock Timing
RCKI Frequency
(2), (3)
128 x f
SMIN
50
MHz
RCKI Period
t
RCKIP
20
1/(128 x f
SMIN
)
ns
RCKI Pulsewidth High
t
RCKIH
0.4 x t
RCKIP
ns
RCKI Pulsewidth Low
t
RCKIL
0.4 x t
RCKIP
ns
Reset Timing
RST Pulse Width Low
t
RSTL
500
ns
Input Serial Port Timing
LRCKI to BCKI Setup Time
t
LRIS
10
ns
BCKI Pulsewidth High
t
SIH
10
ns
BCKI Pulsewidth Low
t
SIL
10
ns
SDIN Data Setup Time
t
LDIS
10
ns
SDIN Data Hold Time
t
LDIH
10
ns
Output Serial Port Timing
SDOUT Data Delay Time
t
DOPD
10
ns
SDOUT Data Hold Time
t
DOH
2
ns
BCKO Pulsewidth High
t
SOH
10
ns
BCKO Pulsewidth Low
t
SOL
5
ns
TDM Mode Timing
LRCKO Setup Time
t
LROS
10
ns
LRCKO Hold Time
t
LROH
10
ns
TDMI Data Setup Time
t
TDMS
10
ns
TDMI Data Hold Time
t
TDMH
10
ns
POWER SUPPLIES
Operating Voltage
V
DD
3.0
+3.3
3.6
V
V
IO
1.65
+3.3
3.6
V
Supply Current
V
DD
= +3.3V, V
IO
= +3.3V
I
DD
, Power Down
RST = 0, No Clocks
100
A
I
DD
, Dynamic
f
SIN
= f
sOUT
= 192kHz
66
mA
I
IO
, Power Down
RST = 0, No Clocks
100
A
I
IO
, Dynamic
f
SIN
= f
SOUT
= 192kHz
2
mA
Total Power Dissipation
V
DD
= +3.3V, V
IO
= +3.3V
P
D
, Power Down
RST = 0, No Clocks
660
W
P
D
, Dynamic
f
SIN
= f
SOUT
= 192kHz
225
mW
ELECTRICAL CHARACTERISTICS
(Cont.)
All parameters specified with T
A
= +25
C, V
DD
= +3.3V, and V
IO
= +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) f
SMIN
= min (f
SIN
, f
SOUT
).
(3) f
SMAX
= max (f
SIN
, f
SOUT
).
SRC4190
SBFS023A
5
www.ti.com
TYPICAL CHARACTERISTICS
At T
A
= +25
C, V
DD
= +3.3V, and V
IO
= +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
96k
80k
60k
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
96k
80k
60k
Frequency (Hz)
0
20
40
60
80
100
120
140
160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(32kHz:48kHz)
0
5k
10k
24k
20k
15k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at 60dBFS
(32kHz:48kHz)
0
5k
10k
24k
20k
15k
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
24k
20k
15k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at 60dBFS
(44.1kHz:48kHz)
0
5k
10k
24k
20k
15k
Frequency (Hz)
60
70
80
90
100
110
120
130
140
150
160
170
SRC4190
SBFS023A
6
www.ti.com
TYPICAL CHARACTERISTICS
(Cont.)
At T
A
= +25
C, V
DD
= +3.3V, and V
IO
= +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
48k
40k
30k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at 60dBFS
(44.1kHz:96kHz)
0
10k
20k
48k
40k
30k
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
96k
80k
60k
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
96k
80k
60k
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
22k
20k
15k
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
22k
20k
15k
Frequency (Hz)
SRC4190
SBFS023A
7
www.ti.com
TYPICAL CHARACTERISTICS
(Cont.)
At T
A
= +25
C, V
DD
= +3.3V, and V
IO
= +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
48k
40k
30k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at 60dBFS
(48kHz:96kHz)
0
10k
20k
48k
40k
30k
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
96k
80k
60k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at 60dBFS
(48kHz:192kHz)
0
20k
40k
96k
80k
60k
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
22k
20k
15k
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
22k
20k
15k
Frequency (Hz)
SRC4190
SBFS023A
8
www.ti.com
TYPICAL CHARACTERISTICS
(Cont.)
At T
A
= +25
C, V
DD
= +3.3V, and V
IO
= +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
24k
20k
15k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at 60dBFS
(96kHz:48kHz)
0
5k
10k
24k
20k
15k
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
96k
80k
60k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at 60dBFS
(96kHz:192kHz)
0
20k
40k
96k
80k
60k
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)
0
1k
2k
6k
5k
3k
4k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at 60dBFS
(192kHz:12kHz)
0
1k
2k
6k
5k
3k
4k
Frequency (Hz)
60
70
80
90
100
110
120
130
140
150
160
170
SRC4190
SBFS023A
9
www.ti.com
TYPICAL CHARACTERISTICS
(Cont.)
At T
A
= +25
C, V
DD
= +3.3V, and V
IO
= +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
16k
15k
12.5k
7.5k
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
16k
15k
12.5k
7.5k
10k
0
20
40
60
80
100
120
140
160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(192kHz:44.1kHz)
0
5k
10k
22k
20k
15k
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
22k
20k
15k
Frequency (Hz)
20
0
40
60
80
100
120
140
160
dBFS
FFT with 1kHz INPUT TONE at 0dBFS
(192kHz:48kHz)
0
5k
10k
24k
20k
15k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at 60dBFS
(192kHz:48kHz)
0
5k
10k
24k
20k
15k
Frequency (Hz)
60
70
80
90
100
110
120
130
140
150
160
170
SRC4190
SBFS023A
10
www.ti.com
TYPICAL CHARACTERISTICS
(Cont.)
At T
A
= +25
C, V
DD
= +3.3V, and V
IO
= +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
48k
40k
30k
Frequency (Hz)
dBFS
FFT with 1kHz INPUT TONE at 60dBFS
(192kHz:96kHz)
0
10k
20k
48k
40k
30k
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
24k
20k
15k
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
22k
20k
15k
Frequency (Hz)
0
20
40
60
80
100
120
140
160
dBFS
FFT with 20kHz INPUT TONE at 0dBFS
(48kHz:96kHz)
0
10k
20k
48k
40k
30k
Frequency (Hz)
20
40
60
80
100
120
140
160
dBFS
FFT with 20kHz INPUT TONE at 0dBFS
(96kHz:48kHz)
0
5k
10k
24k
20k
15k
Frequency (Hz)
SRC4190
SBFS023A
11
www.ti.com
TYPICAL CHARACTERISTICS
(Cont.)
At T
A
= +25
C, V
DD
= +3.3V, and V
IO
= +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
96k
80k
60k
Frequency (Hz)
100
105
110
115
120
125
130
135
140
145
150
T
otal 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
T
otal 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
T
otal 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
T
otal 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
T
otal Harmonic Distortion+Noise (dB)
THD+N vs INPUT AMPLITUDE f
IN
= 1kHz
(44.1kHz:192kHz)
140
120
100
80
0
20
60
40
Input Amplitude (dBFS)
SRC4190
SBFS023A
12
www.ti.com
TYPICAL CHARACTERISTICS
(Cont.)
At T
A
= +25
C, V
DD
= +3.3V, and V
IO
= +3.3V, unless otherwise noted.
100
105
110
115
120
125
130
135
140
145
150
T
otal 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
T
otal Harmonic Distortion+Noise (dB)
THD+N vs INPUT FREQUENCY WITH 0dBFS INPUT
(44.1kHz:48kHz)
0
5k
20k
10k
15k
Input Frequency (Hz)
100
105
110
115
120
125
130
135
140
145
150
T
otal Harmonic Distortion+Noise (dB)
THD+N vs INPUT FREQUENCY WITH 0dBFS INPUT = 1kHz
(48kHz:44.1kHz)
0
5k
20k
10k
15k
Input Frequency (Hz)
100
105
110
115
120
125
130
135
140
145
150
T
otal Harmonic Distortion+Noise (dB)
THD+N vs INPUT FREQUENCY WITH 0dBFS
(48kHz:96kHz)
0
5k
20k
10k
15k
Input Frequency (Hz)
100
105
110
115
120
125
130
135
140
145
150
T
otal Harmonic Distortion+Noise (dB)
THD+N vs INPUT FREQUENCY WITH 0dBFS
(96kHz:48kHz)
0
5k
20k
10k
15k
Input Frequency (Hz)
100
105
110
115
120
125
130
135
140
145
150
T
otal Harmonic Distortion+Noise (dB)
THD+N vs INPUT FREQUENCY WITH 0dBFS
(44.1kHz:192kHz)
0
5k
20k
10k
15k
Input Frequency (Hz)
SRC4190
SBFS023A
13
www.ti.com
TYPICAL CHARACTERISTICS
(Cont.)
At T
A
= +25
C, V
DD
= +3.3V, and V
IO
= +3.3V, unless otherwise noted.
100
105
110
115
120
125
130
135
140
145
150
T
otal Harmonic Distortion+Noise (dB)
THD+N vs INPUT FREQUENCY WITH 0dBFS
(192kHz:44.1kHz)
0
5k
20k
10k
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
SBFS023A
14
www.ti.com
TYPICAL CHARACTERISTICS
(Cont.)
At T
A
= +25
C, V
DD
= +3.3V, and V
IO
= +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
60k
50k
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
22k
20k
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
22k
20k
Input Frequency (Hz)
SRC4190
SBFS023A
15
www.ti.com
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
SBFS023A
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 128f
S
,
256f
S
, or 512f
S
, where f
S
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 I
2
S, Left Justified, or Right Justified. The
audio data word length may be up to 24 bits for I
2
S 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 32f
S
to 128f
S
, with a minimum of one
clock cycle per data bit. In Master mode, BCKI operates at a
fixed rate of 64f
S
.
SRC4190
SBFS023A
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
LSB
MSB
LRCKI
BCKI
SDIN
MSB
MSB
LSB
LSB
(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 f
S
, 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 I
2
S
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
SBFS023A
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 I
2
S, 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 32f
S
to 128f
S
, 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 64f
S
, 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 64f
S
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 f
S
, the output sampling frequency.
The clock duty cycle is fixed to 50% for I
2
S, 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
LSB
MSB
LRCKO
BCKO
SDOUT
MSB
MSB
LSB
LSB
(c) I
2
S Data Format
1/f
S
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
SBFS023A
19
www.ti.com
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
0
1
I
2
S
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
10
F
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
0.1
F
To Pin 22
To Pin 21
V
IO
= +1.65V to V
DD
0.1
F
10
F
To Pin 7
To Pin 8
From
Control
Logic
FIGURE 8. Typical Connection Diagram for the SRC4190.
SRC4190
SBFS023A
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 V
IO
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 V
IO
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/f
s
Left
Right
Left
Right
FIGURE 11. TDM Frame Format.
SRC4190
SBFS023A
21
www.ti.com
The frame rate is equal to the output sampling frequency, f
s
.
The BCKO frequency for the TDM interface is N x 64f
s
, 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 = (f
BCKO
/ f
s
) / 64
Where:
f
BCKO
= Output Port Bit Clock (BCKO), 27.136 MHz maximum
f
s
= 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 (McBSP
TM
) 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
SBFS023A
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 V
IO
and V
DD
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 V
IO
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 768f
S
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.
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
Pb-Free
(RoHS)
CU NIPDAU
Level-2-260C-1YEAR/
Level-1-220C-UNLIM
SRC4190IDBR
ACTIVE
SSOP
DB
28
2000
Pb-Free
(RoHS)
CU NIPDAU
Level-2-260C-1YEAR/
Level-1-220C-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 - May not be currently available - please check
http://www.ti.com/productcontent
for the latest availability information and additional
product content details.
None: Not yet available Lead (Pb-Free).
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.
Green (RoHS & no Sb/Br): TI defines "Green" to mean "Pb-Free" and in addition, uses package materials that do not contain halogens,
including bromine (Br) or antimony (Sb) above 0.1% of total product weight.
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDECindustry 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
9-Dec-2004
Addendum-Page 1
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
9,90
7,90
30
10,50
9,90
0,38
5,60
5,00
15
0,22
14
A
28
1
20
16
6,50
6,50
14
0,05 MIN
5,90
5,90
DIM
A MAX
A MIN
PINS **
2,00 MAX
6,90
7,50
0,65
M
0,15
0
8
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
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,
enhancements, improvements, and other changes to its products and services at any time and to discontinue
any product or service without notice. Customers should obtain the latest relevant information before placing
orders and should verify that such information is current and complete. All products are sold subject to TI's terms
and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in
accordance with TI's standard warranty. Testing and other quality control techniques are used to the extent TI
deems necessary to support this warranty. Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for
their products and applications using TI components. To minimize the risks associated with customer products
and applications, customers should provide adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,
copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process
in which TI products or services are used. Information published by TI regarding third-party products or services
does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.
Use of such information may require a license from a third party under the patents or other intellectual property
of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of information in TI data books or data sheets is permissible only if reproduction is without
alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction
of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for
such altered documentation.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that
product or service voids all express and any implied warranties for the associated TI product or service and
is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.
Following are URLs where you can obtain information on other Texas Instruments products and application
solutions:
Products
Applications
Amplifiers
amplifier.ti.com
Audio
www.ti.com/audio
Data Converters
dataconverter.ti.com
Automotive
www.ti.com/automotive
DSP
dsp.ti.com
Broadband
www.ti.com/broadband
Interface
interface.ti.com
Digital Control
www.ti.com/digitalcontrol
Logic
logic.ti.com
Military
www.ti.com/military
Power Mgmt
power.ti.com
Optical Networking
www.ti.com/opticalnetwork
Microcontrollers
microcontroller.ti.com
Security
www.ti.com/security
Telephony
www.ti.com/telephony
Video & Imaging
www.ti.com/video
Wireless
www.ti.com/wireless
Mailing Address:
Texas Instruments
Post Office Box 655303 Dallas, Texas 75265
Copyright
2004, Texas Instruments Incorporated
PDF 
ZIP