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WM9710

AC鈥?7 Audio CODEC and Mixer with

Integrated Headphone Driver

DESCRIPTION

The WM9710 is a high-quality stereo audio codec with an

integrated headphone driver.

The device is compliant with the Intel AC鈥?7 Rev 2.2

specification. It performs full-duplex 18-bit codec functions and

supports variable sample rates from 8kHz to 48kHz with high

signal to noise ratio. Analogue mixers are included to mix

external analogue signals into the playback or record path.

The WM9710 allows designers to easily integrate phone

functions with other audio functions such as MP3 playback and

voice recording. Mono inputs and outputs are provided to

connect to an external voice codec. The on-chip headphone

driver can distinguish between a stereo headphone and mono

headset, and route the signals accordingly.

Optional AC鈥?7 features include 3D sound enhancement,

2

primary/secondary mode operation and S/PDIF or I S output.

The 5-pin bi-directional AC-Link interface transfers control data,

DAC and ADC words to and from the AC鈥?7 controller. The

WM9710 is fully operable on 3V or 5V or mixed 3/5V supplies,

and is packaged in a leadless, chip scale QFN package with

7mm body size or 48-pin TQFP package.

FEATURES

鈥?/div>

AC鈥?7 rev2.2 compliant, 18-bit stereo codec

Integrated headphone driver

Automatic headset detection and switching (for stereo

headphones / mono phone headsets)

Separately mixed mono output for phone TX path (also

includes headphone buffer for mono earpiece)

Multiple channel input mixer

Mono inputs for phone RX and PCBEEP signals

On-chip sample rate conversion, supports rates from 8kHz

to 48kHz. DAC and ADC rates are fully independent.

Optional S/PDIF or I

2

S digital audio output

3V to 5V operation

Each circuit block can be separately powered on or off

Leadless 7mm

脳

7mm

脳

0.9mm QFN or 48-pin TQFP

package

APPLICATIONS

鈥?/div>

Personal Digital Assistants and 鈥楽martphones鈥?/div>

WinCE systems

BLOCK DIAGRAM

DGND1

DVDD1

DGND2

DVDD2

CX3D1 CX3D2

W

WM9710

LINEINVOL (Reg 10h)

CDVOL (Reg 12h)

MICVOL (Reg 0Eh)

ADCNDAC

(Reg 5Ch)

MUX

HPND

(Reg 5Ch)

M

U

X

MIXVOL

(Reg 72h)

MPM

(Reg 5Ah)

HPVOL

(Reg 04h)

16 / 32Ohm

headphone

HPOUTL

HPOUTR

HPGND

3D

LINEINL

LINEINR

CDL

CDGND

CDR

MIC2

MIC1

M

U

X

MIC SELECT

(Reg 20h) M

0/20

U

dB

X

M

U

X headset autodetect

HPOUTL

MIC BOOST

(Reg 0Eh)

PHONE

RECORD

GAIN

(Reg 1Ch)

ADC

L

DIGITAL

FILTERS

危鈭?/div>

MODULATION

DAC

L

POP

(Reg 20h)

MASTER VOL

(Reg 02h)

RECORD

SELECT

(Reg 1Ah)

ADC

R

VARIABLE

RATE AUDIO

DAC

R

DACVOL

(Reg 18h)

MIX

(Reg 20h)

(Reg 0Ah)

(Reg 0Ch)

M

U

X

M

U

X

MONO VOL

(Reg 06h)

PSEL

(Reg 5Ch)

LINEOUTL

LINEOUTR

MONO_OUT

(TX)

VREFOUT

VREF

CONTROL LOGIC

AC'97

INTERFACE

CLOCK

OSC

PHIZ

(Reg 78h)

XTLOUT

HSDET

EAPD

PWRUP/LRC

SPEN/I2S

SPDIF

CID0

VREF

XTLIN

PCBEEP

BITCLK

SYNC

SDATAIN

SDATAOUT

RESETB

24.576MHz

WOLFSON MICROELECTRONICS plc

www.wolfsonmicro.com

Production Data, December 2003, Rev 4.0

Copyright

餂?003

Wolfson Microelectronics plc

PHONE

(RX)

AGND

AVDD

CAP2

型號

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描述

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