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SRC4190-Q1 Datasheet(PDF) 26 Page - Texas Instruments

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Part No. SRC4190-Q1
Description  192-kHz STEREO ASYNCHRONOUS SAMPLE-RATE CONVERTER
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
Logo TI1 - Texas Instruments

SRC4190-Q1 Datasheet(HTML) 26 Page - Texas Instruments

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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
SRC4190-Q1
SBFS034A – SEPTEMBER 2008 – REVISED OCTOBER 2009
www.ti.com
Figure 13. TDM Interface Where All Devices are Slaves
Figure 14. TDM Interface Where One Device is Master to Multiple Slaves
Pin Compatibility With the Analog Devices AD1895 and AD1896
The SRC4190 is pin-compatible 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 3.3 V, while the VIO and VDD supplies of the SRC4190 must be set to 3.3 V.
Pin 1 connection. For the AD1895, pin 1 is a no connect (NC) 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 96 kHz in order to support the AD1895 and AD1896
specification. This is despite the fact that the SRC4190 supports a maximum sampling frequency of 212 kHz in
Master mode. The user should consider building an option into the 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 devices, if all reference clock (RCKI) inputs are
driven from the same clock source, the devices will be phase matched.
26
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Copyright © 2008–2009, Texas Instruments Incorporated
Product Folder Link(s): SRC4190-Q1


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