AD74322AARU datasheet(2/20 Pages) AD

Part #	AD74322AARU

Description	Low Cost, Low Power Stereo Audio Analog Front End

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Manufacturer	AD [Analog Devices]

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AD74322

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PRELIMINARY TECHNICAL DATA

PRELIMINAR

Y

TECHNICAL

DA

TA

An on-chip reference voltage is included but can be

bypassed if required for use with an external reference

source.

The AD74322 offers sampling rates which, depending on

MCLK selection and MCLK divider ratio, range from 8

kHz in the voiceband range to 96 kHz in the audio range.

The digital interface to the AD74322 is configured as two

separate ports which allow separation of device control

and data streams. Control and status are monitored using

an SPI

® compatible serial port while the input and output

data streams are controlled using an I

2S® port. The two

I2S streams are controlled by a common Bit-Clock and

Left/Right Clock pins. There is also a DSP mode

available on the audio data port which will also allow both

control and data to be streamed through the same interface

where controller resources are limited.

The AD74322 is available in various lead count package

options. These range from a 16-pin variant with single-

ended inputs/outputs and no SPI port through a 20-pin

variant with single-ended inputs/outputs and an SPI port

to a 24-pin variant with differential inputs/outputs and an

SPI port. These devices will be available in SOIC, SSOP

and TSSOP package options and are specified for the

industrial temperature range of -40°C to +85°C.

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