CS8421
32-bit, 192 kHz Asynchronous Sample Rate Converter
Features
!
175 dB Dynamic Range
!
–140 dB THD+N
!
No Programming Required
!
No External Master Clock Required
!
Supports Sample Rates up to 211 kHz
!
Input/Output Sample Rate Ratios from 7.5:1 to
!
Bypass Mode
!
Time Division Multiplexing (TDM) Mode
!
Attenuates Clock Jitter
!
Multiple Part Outputs are Phase-Matched
!
Linear Phase FIR Filter
!
Automatic Soft Mute/Unmute
!
+2.5 V Digital Supply (VD)
!
+3.3 V or 5.0 V Digital Interface (VL)
!
Space-Saving 20-Pin TSSOP and QFN
1:8
!
Master Clock Support for 128 x Fs, 256 x Fs,
384 x Fs, and 512 x Fs (Master Mode)
!
16, 20, 24, or 32-bit Data I/O
!
32-bit Internal Signal Processing
!
Dither Automatically Applied and Scaled to
Packages
The CS8421 supports sample rates up to 211 kHz and
is available in 20-pin TSSOP and QFN packages in both
Commercial (-10° to +70°C) and Automotive (-40° to
+85°C) grades. The CDB8421 Customer Demonstra-
tion board is also available for device evaluation and
implementation suggestions. Please see
for complete details.
Output Resolution
!
Flexible 3-Wire Serial Digital Audio Input and
Output Ports
!
Master and Slave Modes for Both Input and
Output
RST
Level Translators
BYPASS
SDIN
Level Translators
ISCLK
ILRCK
Serial
Audio
Input
Data
Sync Info
Time
Varying
Digital
Filters
Level Translators
TDM_IN
SDOUT
OSCLK
OLRCK
Data
Sync Info
Serial
Audio
Data
Output
Digital
PLL
Serial
Port
Mode
Decoder
Clock
Generator
SRC_UNLOCK
MCLK_OUT
MS_SEL
SAIF
SAOF
3.3 V or 5.0 V (VL)
2.5 V (VD)
GND
XTI
XTO
Copyright
©
Cirrus Logic, Inc. 2006
(All Rights Reserved)
JULY '06
DS641F1
CIRRUS [ CIRRUS LOGIC ]
