WM8788 Datasheet, PDF (1/22 Pages) Wolfson Microelectronics plc – High Performance 24-bit Stereo ADC

w
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
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews
Preliminary Technical Data, December 2010, Rev 2.2
Copyright ©2010 Wolfson Microelectronics plc