CS8421-CZZ datasheet(1/38 Pages) CIRRUS

Part #	CS8421-CZZ

Description	32-bit, 192 kHz Asynchronous Sample Rate Converter

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Manufacturer	CIRRUS [Cirrus Logic]

Direct Link	http://www.cirrus.com

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 Cirrus Logic, Inc. 2009

http://www.cirrus.com

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 of 7.5:1 to 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

Output Resolution

 Flexible 3-wire Serial Digital Audio Input and

Output Ports

 Master and Slave Modes for Both Input and

Output

 Bypass Mode

 Time Division Multiplexing (TDM) Mode

 Attenuates Clock Jitter

 Multiple Device 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

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 “Ordering In-

formation” on page 36 for complete details.

Serial

Audio

Input

Time

Varying

Digital

Filters

BYPASS

Digital

PLL

Clock

Generator

ILRCK

ISCLK

SDIN

Sync Info

Data

Serial

Audio

Output

OLRCK

OSCLK

SDOUT

XTI

XTO

SRC_UNLOCK

2.5 V (VD)

GND

RST

Sync Info

Data

Level Translators

TDM_IN

MS_SEL

SAIF

SAOF

Serial

Port

Mode

Decoder

MCLK_OUT

3.3 V or 5.0 V (VL)

APRIL ‘09

DS641F2

CS8421

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