WM8711 Wolfson Microelectronics Ltd., WM8711 Datasheet

WM8711

Manufacturer Part Number

WM8711

Description

Internet Audio DAC With Integrated Headphone Driver

Manufacturer

Wolfson Microelectronics Ltd.

Datasheet

1.WM8711.pdf (36 pages)

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DESCRIPTION

The WM8711 is a low power stereo DAC with an integrated

headphone driver. The WM8711 is designed specifically for

portable MP3 audio and speech players. The WM8711 is

also ideal for MD, CD machines and DAT players.

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 96KHz are supported.

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.

A USB mode is provided where all audio rates can be

derived from a single 12MHz MCLK, saving on the need for

a PLL or multiple crystals.

BLOCK DIAGRAM

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

http://www.wolfson.co.uk

DACLRC (5)

DACDAT (4)

BCLK (3)

WM8711

(26)

OSC

Internet Audio DAC with Integrated Headphone Driver

(22)

CONTROL INTERFACE

(25)

(23)

FILTERS

DIGITAL

(Div x1, x2)

DIVIDER

CLKIN

(24)

(Div x1, x2)

DIVIDER

(21)

CLKIN

(2)

DAC

(27)

FEATURES

APPLICATIONS

MUTE

Audio Performance

DAC Sampling Frequency: 8KHz – 96KHz

2 or 3-Wire MPU Serial Control Interface

Programmable Audio Data Interface Modes

Stereo Audio Outputs

Output Volume and Mute Controls

Highly Efficient Headphone Driver

Playback Mode Power Consumption < 18mW

28-Pin SSOP Package

Portable MP3 Players

CD and Minidisc Players

(1)

100dB SNR (‘A’ weighted @ 48kHz) DAC

1.42 – 3.6V Digital Supply Operation

2.7 – 3.6V Analogue Supply Operation

16/20/24/32 bit Word Lengths

Master or Slave Clocking Mode

S, Left, Right Justified or DSP

(14)

(28)

+6 to -73dB

1 dB Steps

(16)

MUTE

VOL/

phase of development. These products may

be changed or discontinued without notice.

specifications for products in the formative

(15)

Product Preview, Novembert 2000, 1.2

Product Preview data sheets contain

DRIVER

H/P

2000 Wolfson Microelectronics Ltd

(8) HPVDD

(11) HPGND

(19) RLINEIN

(10) RHPOUT

(13) ROUT

(12) LOUT

(9) LHPOUT

(20) LLINEIN

WM8711

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