CS8422 datasheet(2/82 Pages) CIRRUS

2 / 82 page

DS692PP2

CS8422

System Features

 SPI™ or I²C® Software Mode and Stand-alone

Hardware Mode

 Flexible 3-wire Digital Serial Audio Input Port

 Dual Serial Audio Output Ports with

Independently Selectable Data Paths

 Master or Slave Mode Operation for all Serial

Audio Ports

 Time Division Multiplexing (TDM) Mode

 Integrated Oscillator for use with External

Crystal

 Four General-purpose Output Pins (GPO)

 +3.3 V Analog Supply (VA)

 +1.8 V to 5.0 V Digital Interface (VL)

 Space-saving 32-pin QFN Package

General Description

The CS8422 is a 24-bit, high-performance, monolithic

CMOS stereo asynchronous sample rate converter with

an integrated digital audio interface receiver that de-

codes audio data according to the EIAJ CP1201, IEC-

60958, AES3, and S/PDIF interface standards.

Audio data is input through the digital interface receiver

or a 3-wire serial audio input port. Audio is output

through one of two 3-wire serial audio output ports. Se-

rial audio data outputs can be set to 24-, 20-, 18-, or 16-

bit word-lengths. Data into the digital interface receiver

and serial audio input port can be up to 24-bits long. In-

put and output data can be completely asynchronous,

synchronous to an external clock through XTI, or syn-

chronous to the recovered master clock.

The CS8422 can be controlled through the control port

in Software Mode or in a Stand-Alone Hardware Mode.

In Software Mode, the user can control the device

through an SPI or I²C control port.

Target applications include digital recording systems

(DVD-R/RW, CD-R/RW, PVR, DAT, MD, and VTR), dig-

ital

mixing

consoles,

high-quality

D/A,

effects

processors, computer audio systems, and automotive

audio systems.

The CS8422 is available in a space-saving QFN pack-

age in both Commercial (-40° C to +85° C) and

Automotive (-40° C to +105° C) grades. The CDB4822

is also available for device evaluation and implementa-

tion suggestions. Please refer to “Ordering Information”

on page 80 for complete details.

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