Datasheet > WM8731

WM8731

更新时间： 2024-11-21 22:41:27

品牌	Logo	应用领域
欧胜 - WOLFSON		解码器驱动器编解码器便携式
页数	文件大小	规格书
56页	594K
描述
Portable Internet Audion CODEC with Headphone Driver and Programmable Sample Rates

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WM8731 数据手册

WM8731

Portable Internet Audio CODEC with

Headphone Driver and Programmable Sample Rates

Advanced Information, Rev 2.0, February 2001

DESCRIPTION

FEATURES

•

Audio Performance

The WM8731 is a low power stereo CODEC with an

integrated headphone driver. It offers the user the unique

ability to independently program the ADC and DAC sample

rates from a single clock source. The WM8731 is designed

specifically for portable MP3 audio and speech players and

recorders. The WM8731 is also ideal for MD, CD-RW

machines and DAT recorders.

−

97dB SNR (‘A’ weighted @ 48kHz) ADC

100dB SNR (‘A’ weighted @ 48kHz) DAC

1.42 – 3.6V Digital Supply Operation

2.7 – 3.6V Analogue Supply Operation

•

ADC and DAC Sampling Frequency: 8kHz – 96kHz

Selectable ADC High Pass Filter

2 or 3-Wire MPU Serial Control Interface

Programmable Audio Data Interface Modes

Stereo line and mono microphone level audio inputs are

provided, along with a mute function, programmable line

level volume control and a bias voltage output suitable for

an electret type microphone.

−

I²S, Left, Right Justified or DSP

16/20/24/32 bit Word Lengths

Master or Slave Clocking Mode

Stereo 24-bit multi-bit sigma delta ADCs and DACs are

used with oversampling digital interpolation and decimation

filters. Digital audio input word lengths from 16-32 bits and

sampling rates from 8kHz to 96kHz are supported.

•

Stereo Audio Inputs and Outputs

Microphone Input and Electret Bias with Side Tone Mixer

Input and Output Volume and Mute Controls

Highly Efficient Headphone Driver

Playback Mode Power Consumption < 18mW

Analogue Pass Through Power Consumption < 9mW

28-Pin SSOP Package

Stereo audio outputs are buffered for driving headphones

from a programmable volume control, line level outputs are

also provided along with anti-thump mute and power

up/down circuitry.

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 28-

pin SSOP package.

APPLICATIONS

•

Portable MP3 Players and Recorders

CD and Minidisc Recorders

BLOCK DIAGRAM

AVDD

CONTROL INTERFACE

WM8731

VMID

HPVDD

Bypass

MUTE

HPGND

AGND

ATTEN/

MUTE

+6 to -73dB

1 dB Steps

Side Tone

H/P

DRIVER

VOL/

MUTE

MICBIAS

RLINEIN

RHPOUT

VOL

MUTE

ADC

MUX

DAC

+12 to -34.5dB,

1.5dB Steps

ROUT

LOUT

0dB/

20dB

DIGITAL

FILTERS

MICIN

MUTE

MUX

MUTE

VOL

LLINEIN

VOL/

MUTE

H/P

DRIVER

LHPOUT

+12 to -34.5dB,

1.5dB Steps

Side Tone

+6 to -73dB

1 dB Steps

ATTEN/

MUTE

CLKIN

DIVIDER

CLKOUT

DIVIDER

Bypass

OSC

DIGTAL AUDIO INTERFACE

(Div x1, x2)

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

Advanced Information data sheets

contain preliminary data on new products

in the preproduction phase of

development. Supplementary data will be

published at a later date.

2001 Wolfson Microelectronics Ltd.

12 3 4 5 6 7...56

中文翻译

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与WM8731相关器件

型号	品牌	获取价格	描述	数据表
WM8731_06	WOLFSON	获取价格	Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates
WM8731_09	WOLFSON	获取价格	Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates
WM8731CLSEFL	WOLFSON	获取价格	Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates
WM8731CLSEFL/R	WOLFSON	获取价格	Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates
WM8731CSEFL	WOLFSON	获取价格	Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates
WM8731CSEFL/R	WOLFSON	获取价格	Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates
WM8731EDS	WOLFSON	获取价格	portable digital audio solutions
WM8731EDS/R	CIRRUS	获取价格	Consumer IC,
WM8731L	WOLFSON	获取价格	portable digital audio solutions
WM8731LEDS	WOLFSON	获取价格	portable digital audio solutions

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