WM8718 データシートの表示（PDF） - Wolfson Microelectronics plc

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WM8718

24 Bit Differential Stereo DAC with Volume Control

Wolfson Microelectronics plc 

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WM8718

24 Bit Differential Stereo DAC with Volume Control

DESCRIPTION

The WM8718 is a high performance differential stereo DAC

designed for audio applications such as DVD, home theatre

systems and digital TV. The WM8718 supports PCM data

input word lengths from 16 to 32-bits and sampling rates up

to 192kHz. The WM8718 consists of a serial interface port,

digital interpolation filters, multi-bit sigma delta modulators

and differential stereo DAC in a small 20-lead SSOP

package or 24-lead QFN package. The WM8718 includes a

digitally controllable mute, an attenuate function and zero

flag output for each channel.

The 3-wire serial control port provides access to a wide

range of features including on-chip mute, attenuation and

phase reversal.

The WM8718 is an ideal device to interface to AC-3™,

DTS™, and MPEG audio decoders for surround sound

applications, or for use in DVD players including those

supporting DVD-A.

BLOCK DIAGRAM

FEATURES

• 24 bit Stereo DAC

• Fully Differential Voltage Outputs

• Audio Performance

- 111dB SNR (‘A’ weighted @ 48kHz) DAC

- -100dB THD

• DAC Sampling Frequency: 8kHz - 192kHz

• 3 Wire Serial Control Interface

• Programmable Audio Data Interface Modes

- I2S, Left, Right Justified, DSP

- 16/20/24/32 bit Word Lengths

• Independent Digital Volume Control on Each Channel with

127.5dB Range in 0.5dB Steps

• Independent Zero Flag Outputs

• 3.0V - 5.5V Supply Operation

• 20-lead SSOP Package or 24-lead QFN Package

APPLICATIONS

• CD, DVD, and DVD-Audio Players

• Home theatre systems

• Professional mixing desks

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WM8718

CONTROL

INTERFACE

ZEROFR

ZEROFL

BCKIN

LRCIN

DIN

AUDIO

INTERFACE

ATT/

MUTE

ATT/

MUTE

DIGITAL

FILTERS

SIGMA

DELTA

MODULATOR

SIGMA

DELTA

MODULATOR

DAC

DAC

VOUTRP

VOUTRN

VOUTLP

VOUTLN

VMID

WOLFSON MICROELECTRONICS plc

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Production Data, November 2006, Rev 4.3

Copyright ©2006 Wolfson Microelectronics plc

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