WM8788 データシートの表示（PDF） - Wolfson Microelectronics plc

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WM8788

High Performance 24-bit Stereo ADC

Wolfson Microelectronics plc 

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WM8788

High Performance 24-bit Stereo ADC

DESCRIPTION

FEATURES

The WM8788 is a high performance 24-bit stereo ADC

designed for LCD televisions, DVD, Blu-Ray and set-top box

applications.

A stereo pair of analogue inputs is provided; external resistors

are used to configure the device for line level inputs at 1Vrms or

for higher input signal levels. The Hi-Fi ADCs output 16, 20 or

24-bit stereo data on the digital audio interface.

ADC sample rates from 8kHz to 192kHz are supported; Master

Clock (MCLK) ratios of 128fs up to 768fs are possible (fs =

sample rate).

The digital audio interface operates in Master or Slave modes,

and supports Right-justified, Left-justified and I2S modes,

selectable using hardware control pins.

The WM8788 is powered from a single 3.3V supply rail,

connected to the AVDD and REFVDD pins.

A power on reset (POR) circuit ensures correct start-up and

shut-down. The device is held in reset when MCLK is not

present, offering a low-power standby state.

The WM8788 is supplied in a 16-pin TSSOP package.

• Hi-Fi audio ADC

- 106dB SNR (‘A’ weighted

- -91dB THD (-1dBFS output)

- Sample rates 8kHz to 192kHz

• 2 analogue audio inputs

- Support for line level inputs >1Vrms

• Digital audio interface

- Master or Slave operation

- 16, 20 or 24-bit data format

- Right-justified, Left-justified, I2S modes

• Wide range of master clock (MCLK) rates

- 128fs, 192fs, 256fs, 384fs, 512fs, 768fs support

• Hardware configuration control

• Integrated voltage reference circuits

• Single 3.3V supply

• 16-pin TSSOP package

APPLICATIONS

• LCD televisions

• Set-top boxes (STB)

• Blu-Ray / DVD players and recorders

BLOCK DIAGRAM

INLFB

INL

INRFB

INR

Reference

Generator

ADC L

ADC R

Digital

Filters

VMIDC REFVDD

AVDD

AGND

WM8788

AIF

Control

Interface

BCLK

LRCLK

ADCDAT

MCLK

MASTER

OSR

AIFMODE0

AIFMODE1

WOLFSON MICROELECTRONICS plc

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Preliminary Technical Data, December 2010, Rev 2.2

Copyright ©2010 Wolfson Microelectronics plc

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