WM8772(2005) 데이터 시트보기 (PDF) - Wolfson Microelectronics plc

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WM8772
(Rev.:2005)

24-bit, 192kHz 6-Channel Codec with Volume Control

Wolfson Microelectronics plc 

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WM8772

24-bit, 192kHz 6-Channel Codec with Volume Control

DESCRIPTION

The WM8772 is a multi-channel audio codec ideal for DVD

and surround sound processing applications for home hi-fi,

automotive and other audio visual equipment.

A stereo 24-bit multi-bit sigma delta ADC is used. Digital

audio output word lengths from 16-32 bits and sampling

rates from 32kHz to 96kHz are supported. The 32-lead

version allows separate ADC and DAC samples rates.

Three stereo 24-bit multi-bit sigma delta DACs are used

with oversampling digital interpolation filters. Digital audio

input word lengths from 16-32 bits and sampling rates from

8kHz to 192kHz are supported. Each DAC channel has

independent digital volume and mute control.

The audio data interface supports I2S, left justified, right

justified and DSP digital audio formats.

The device is controlled via a 3 wire serial interface. The

interface provides access to all features including channel

selection, volume controls, mutes, de-emphasis and power

management facilities. The device is available in a 28 lead

SSOP or 32 lead TQFP.

BLOCK DIAGRAM - 28 LEAD SSOP

FEATURES

• Audio Performance

− 103dB SNR (‘A’ weighted @ 48kHz) DAC

− 100dB SNR (‘A’ weighted @ 48kHz) ADC (TQFP)

• DAC Sampling Frequency: 8kHz – 192kHz

• ADC Sampling Frequency: 32kHz – 96kHz

• ADC and DAC can run at different sample rates (32 pin

TQFP version only)

• 3-Wire SPI Serial or Hardware Control Interface

• Programmable Audio Data Interface Modes

− I2S, Left, Right Justified or DSP

− 16/20/24/32 bit Word Lengths

• Three Independent stereo DAC outputs with independent

digital volume controls

• Master or Slave Audio Data Interface

• 2.7V to 5.5V Analogue, 2.7V to 3.6V Digital supply

Operation

• 28 lead SSOP or 32 lead TQFP Package

APPLICATIONS

• DVD Players

• Surround Sound AV Processors and Hi-Fi systems

• Automotive Audio

AINL

AINR

VREFN

STEREO

ADC

AUDIO

INTERFACE

&

DIGITAL FILTERS

VREFN VREFP

STEREO

DAC

STEREO

DAC

STEREO

DAC

LOW

PASS

FILTER

LOW

PASS

FILTER

LOW

PASS

FILTER

VOUT1L

VOUT1R

VOUT2L

VOUT2R

VOUT3L

VOUT3R

CONTROL INTERFACE

W

WM8772EDS

WOLFSON MICROELECTRONICS plc

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Production Data, October 2005, Rev 4.2

Copyright 2005 Wolfson Microelectronics plc

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