CS8420_07 Datasheet, PDF (1/94 Pages) Cirrus Logic – DIGITAL AUDIO SAMPLE RATE CONVERTER

CS8420
Digital Audio Sample Rate Converter
Features
General Description
 Complete IEC60958, AES3, S/PDIF, EIAJ
CP1201-compatible Transceiver with
Asynchronous Sample Rate Converter
 Flexible 3-wire Serial Digital I/O Ports
 8-kHz to 108-kHz Sample Rate Range
 1:3 and 3:1 Maximum Input to Output Sample
Rate Ratio
 128 dB Dynamic Range
 -117 dB THD+N at 1 kHz
 Excellent Performance at Almost a 1:1 Ratio
 Excellent Clock Jitter Rejection
 24-bit I/O Words
 Pin and Microcontroller Read/Write Access to
Channel Status and User Data
 Microcontroller and Stand-Alone Modes
The CS8420 is a stereo digital audio sample rate con-
verter (SRC) with AES3-type and serial digital audio
inputs, AES3-type and serial digital audio outputs, and
includes comprehensive control ability via a 4-wire mi-
crocontroller port. Channel status and user data can be
assembled in block-sized buffers, making
read/modify/write cycles easy.
Digital audio inputs and outputs may be 24, 20, or 16
bits. The input data can be completely asynchronous to
the output data, with the output data being synchronous
to an external system clock.
The CS8420 is available in a 28-pin SOIC package in
both Commercial (-10º to +70º C) and Automotive
grades (-40º to +85º C). The CDB8420 Customer Dem-
onstration board is also available for device evaluation
and implementation suggestions.
Please refer to “Ordering Information” on page 93 for or-
dering information.
Target applications include CD-R, DAT, MD, DVD and
VTR equipment, mixing consoles, digital audio trans-
mission equipment, high-quality D/A and A/D
converters, effects processors, and computer audio
systems.
VA+ AGND FILT RERR RMCK
VD+ DGND
ILRCK
ISCLK
SDIN
RXP
RXN
Serial
Audio
Input
Sample
Rate
Converter
Serial
Audio
Output
OLRCK
OSCLK
SDOUT
Receiver
Clock & AES3
Data
S/PDIF
Recovery Decoder
C & U bit
Data
Buffer
AES3
S/PDIF
Encoder
Driver
TXP
TXN
Misc.
Control
Control
Port &
Registers
Output
Clock
Generator
H/S RST
EMPH U TCBL SDA/ SCL/ AD1/ AD0/ INT
CDOUT CCLK CDIN CS
OMCK
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2007
(All Rights Reserved)
APRIL '07
DS245F4