w
High Performance 24-bit Stereo ADC
DESCRIPTION
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.
WM8788
FEATURES
•
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
WM8788
INLFB
INL
ADC L
Digital
Filters
ADC R
AIF
BCLK
LRCLK
ADCDAT
MCLK
INRFB
INR
Reference
Generator
MASTER
Control
Interface
OSR
AIFMODE0
AIFMODE1
VMIDC
REFVDD
AVDD
AGND
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
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
