WM8739 查看數據表（PDF） - Wolfson Microelectronics plc

零件编号

产品描述 (功能)

生产厂家

WM8739

Stereo Audio ADC

Wolfson Microelectronics plc 

WM8739 / WM8739L

Stereo Audio ADC

DESCRIPTION

The WM8739 is a stereo audio ADC. The WM8739 is

designed specifically for portable MP3 audio and speech

players and recorders. The WM8739 is also ideal for MD,

CD-RW machines and DAT recorders.

Stereo line-level audio inputs are provided, along with a

mute and volume function, and master or slave mode

clocking schemes. The device also has a programmable

high pass filter to remove residual DC offsets.

Stereo 24-bit multi-bit sigma delta ADCs are used with

oversampling digital interpolation and digital filters. Digital

audio output word lengths from 16-32 bits and sampling

rates from 8KHz to 96KHz are supported.

The device is controlled via a 2 or 3 wire serial interface.

The interface provides access to all features including

volume controls, mutes, de-emphasis and extensive power

management facilities. The device is available in a small 20-

pin SSOP package.

BLOCK DIAGRAM

FEATURES

• 90dB SNR (‘A’ weighted @ 48kHz) ADC

• Low Power

- 12mW all-on, 1.4mW standby (‘L’ version)

- 41mW all-on, 5.3mW standby (standard version)

• Low Supply Voltages

- 1.8 – 3.6V Analogue Supply (‘L’ version)

- 2.7 – 3.6V Analogue Supply (standard version)

- 1.42 – 3.6V Digital Supply (both versions)

• Input Volume and Mute Controls

• ADC Sampling Frequency: 8KHz – 96KHz

• Selectable ADC High Pass Filter

• 2 or 3-Wire MPU Serial Control Interface

• Programmable Audio Data Interface Modes

- I2S, Left, Right Justified or DSP

- 16/20/24/32 bit Word Lengths

- Master or Slave Clocking Mode

• 20-Pin SSOP or 5x5mm QFN Package Options

APPLICATIONS

• CD, Minidisc and DAT Recorders

• General Purpose Audio Digitisation

AVDD

VMID

AGND

RLINEIN

VOL/

MUTE

+12 to -34.5dB,

1.5dB Steps

LLINEIN

VOL/

MUTE

+12 to -34.5dB,

1.5dB Steps

CONTROL INTERFACE

ADC

ADC

DIGITAL

FILTERS

WM8739

ADCDAT

ADCLRC

BCLK

OSC

DIV2

WOLFSON MICROELECTRONICS LTD

www.wolfsonmicro.com

Advanced Information, September 2001, Rev 2.2

Copyright 2001 Wolfson Microelectronics Ltd.

Share Link: