Document
CS8421
32-bit, 192 kHz Asynchronous Sample Rate Converter
Features
z 175 z Flexible 3-Wire Serial Digital Audio Input and
dB Dynamic Range z –140 dB THD+N z No Programming Required z No External Master Clock Required z Supports Sample Rates up to 211 kHz z Input/Output Sample Rate Ratios from 7.5:1 to 1:8 z Master Clock Support for 128 x fs, 256 x fs, 384 x fs, and 512 x fs (Master Mode) z 16, 20, 24, or 32-bit Data I/O z 32-bit Internal Signal Processing z Dither Automatically Applied and Scaled to Output Resolution
I
Output Ports z Master and Slave Modes for Both Input and Output z Bypass Mode z Time Division Multiplexing (TDM) Mode z Attenuates Clock Jitter z Multiple Part Outputs are Phase Matched z Linear Phase FIR Filter z Automatic Soft Mute/Unmute z +2.5 V Digital Supply (VD) z +3.3 V or 5.0 V Digital Interface (VL) z Space Saving 20-pin TSSOP and QFN Packages
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 Data Audio 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
Preliminary Product Information
http://www.cirrus.com
This document contains information for a new product. Cirrus Logic reserves the right to modify this product without notice.
Copyright © Cirrus Logic, Inc. 2005 (All Rights Reserved)
JAN ‘05 DS641PP1 1
CS8421
General Description
The CS8421 is a 32-bit, high performance, monolithic CMOS stereo asynchronous sample rate converter. Digital audio inputs and outputs can be 32, 24, 20, or 16-bits. Input and output data can be completely asynchronous, synchronous to an external data clock, or the part can operate without any external clock by using an integrated oscillator. Audio data is input and output through configurable 3-wire input/output ports. The CS8421 does not require any software control via a control port. Target applications include digital recording systems (DVD-R/RW, CD-R/RW, PVR, DAT, MD, and VTR), digital mixing consoles, high quality D/A, effects processors, computer audio systems, and automotive audio systems. The part is available in space saving 20-pin TSSOP and QFN packages and supports sample rates up to 211 kHz.
ORDERING INFORMATION
Product Description Package Pb-Free Temp Range TSSOP TSSOP QFN QFN TSSOP TSSOP YES YES YES YES YES YES -10° to +70°C -10° to +70°C -40° to +85°C Container Rail Rail Rail Order# CS8421-CZZ CS8421-CNZ CS8421-DZZ CDB8421 CS8421 32-bit Asynchronous Sample Rate Converter CS8421 32-bit Asynchronous Sample Rate Converter CS8421 32-bit Asynchronous Sample Rate Converter CS8421 32-bit Asynchronous Sample Rate Converter CS8421 32-bit Asynchronous Sample Rate Converter CS8421 32-bit Asynchronous Sample Rate Converter CDB8421 Evaluation Board for CS8421
-10° to +70°C Tape and Reel CS8421-CZZR -10° to +70°C Tape and Reel CS8421-CNZR -40°.