WM8711SEDSSLASHR datasheet(1/47 Pages) WOLFSON

部件名	WM8711SEDS/R

功能描述	Internet Audio DAC with Integrated Headphone Amplifier

PDF	47 Pages

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制造商	WOLFSON [Wolfson Microelectronics plc]

网页	http://www.wolfsonmicro.com

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WM8711 / WM8711L

Internet Audio DAC with Integrated Headphone Amplifier

WOLFSON MICROELECTRONICS plc

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Production Data, September 2006, Rev 4.3

Copyright

2006 Wolfson Microelectronics plc

DESCRIPTION

The WM8711 or WM8711L (WM8711/L) is a low power

stereo DAC with an integrated headphone driver. The

WM8711/L is designed specifically for portable MP3 audio

and speech players. The WM8711/L 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-

lead SSOP package or the smaller 28-lead QFN (5x5x0.9

mm Body) package.

A USB mode is provided where all audio rates can be

derived from a single 12MHz or 24MHz MCLK, saving on

the need for a PLL or multiple crystals.

FEATURES

•

Audio Performance

-

DAC SNR 100dB (‘A’ weighted) at AVDD = 3.3V

-

DAC SNR 90dB (‘A’ weighted) at AVDD = 1.8V

(WM8711L)

•

Low Power Headphone Playback

-

Down to 20mW at 3.3V

-

Down to 6mW at 1.8V (WM8711L)

-

1.42 – 3.6V Digital Supply Operation

-

2.7 – 3.6 V Analogue Supply Operation

-

1.8 – 3.6 V Analogue Supply Operation (‘L’ Variant)

•

DAC Sampling Frequency: 8KHz – 96KHz

•

2 or 3-Wire MPU Serial Control Interface

•

Programmable Audio Data Interface Modes

-

I

2S, Left, Right Justified or DSP

-

16/20/24/32 bit Word Lengths

-

Master or Slave Clocking Mode

•

Stereo Audio Outputs

•

Output Volume and Mute Controls

•

Highly Efficient Headphone Driver

•

28-lead SSOP or 28-lead QFN (5x5x0.9 mm) package

APPLICATIONS

•

Portable MP3 Players

•

CD and Minidisc Players

BLOCK DIAGRAM

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