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WM8729

24-bit, 192kHz Stereo DAC

Product Preview, Rev 1.2, April 2001

DESCRIPTION

The WM8729 is a high performance stereo DAC designed

for audio applications such as DVD, home theatre systems,

and digital TV. The WM8729 supports data input word

lengths from 16 to 24-bits and sampling rates up to 192kHz.

The WM8729 consists of a serial interface port, digital

interpolation filters, multi-bit sigma delta modulators and

stereo DAC in a small 16-pin SOIC package.

The WM8729 has a hardware control interface for selection

of audio data interface format and de-emphasis.

The WM8729 is an ideal device to interface to AC-3錚?

DTS錚? and MPEG audio decoders for surround sound

applications, or for use in DVD players, including supporting

the implementation of 2 channels at 192kHz for high-end

DVD-Audio applications.

FEATURES

鈥?/div>

Stereo DAC

Audio Performance

-

106dB SNR (鈥楢鈥?weighted @ 48kHz) DAC

-

-97dB THD

DAC Sampling Frequency: 8kHz 鈥?192kHz

Pin Selectable Audio Data Interface Format

-

I

2

S or Right Justified

3.0V - 5.5V Supply Operation

16-pin SOIC Package

Exceeds Dolby Class A Performance Requirements

鈥?/div>

APPLICATIONS

鈥?/div>

DVD-Audio and DVD 鈥楿niversal鈥?Players

Home theatre systems

Digital TV

Digital broadcast receivers

BLOCK DIAGRAM

FORMAT MUTEB

DEM

CONTROL INTERFACE

WM8729

MUTE

BCKIN

LRCIN

DIN

MUTE

SERIAL

INTERFACE

DIGITAL FILTERS

SIGMA

DELTA

MODULATOR

RIGHT

DAC

LOW

PASS

FILTER

VOUTR

SIGMA

DELTA

MODULATOR

LEFT

DAC

LOW

PASS

FILTER

VOUTL

VMID

MCLK

AVDD DVDD

VREFP VREFN

AGND

DGND

WOLFSON MICROELECTRONICS LTD

Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK

Tel: +44 (0) 131 667 9386

Fax: +44 (0) 131 667 5176

Email: sales@wolfson.co.uk

www.wolfsonmicro.com

Product Preview

data sheets contain

specifications for products in the formative

phase of development. These products may

be changed or discontinued without notice.

餂?001

Wolfson Microelectronics Ltd

.

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