AD74322AARU Просмотр технического описания (PDF) - Analog Devices

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AD74322AARU

Low Cost, Low Power Stereo Audio Analog Front End

Analog Devices 

AD74322

PRELIMINARY TECHNICAL DATA

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 I2S® 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

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

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

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

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

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

IM and TSSOP package options and are specified for the

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

–2–

Pr D 03/00

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