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24-Bit, 192kHz Stereo ADC
DESCRIPTION
The WM8782 is a high performance, low cost stereo audio
ADC designed for recordable media applications.
The device offers stereo line level inputs along with two
control input pins (FORMAT, IWL) to allow operation of the
audio interface in three industry standard modes. An
internal op-amp is integrated on the front end of the chip to
accommodate analogue input signals greater than 1V
rms
.
The device also has a high pass filter to remove residual
DC offsets.
WM8782 offers Master or Slave mode clocking schemes.
A control input pin M/S is used to allow Slave mode
operation or Master mode operation. A stereo 24-bit multi-
bit sigma-delta ADC is used with 128x, 64x or 32x over-
sampling, according to sample rate. Digital audio output
word lengths from 16-24 bits and sampling rates from
8kHz to 192kHz are supported.
The device is a hardware controlled device and is supplied
in a 20-SSOP package.
WM8782
FEATURES
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SNR 102dB (‘A’ weighted @ 48kHz)
THD -90dB (at –1dB)
Sampling Frequency: 8 – 192kHz
Master or Slave Clocking Mode
System Clock (MCLK): 128fs, 192fs, 256fs, 384fs, 512fs,
768fs
Audio Data Interface Modes
- 16-24 bit I
2
S, 16-24 bit Left, 16-24 bit Right Justified
Supply Voltages
- Analogue 2.7 to 5.5V
- Digital core: 2.7V to 3.6V
20-pin SSOP package
APPLICATIONS
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Recordable DVD Players
Personal Video Recorders
STB
Studio Audio Processing Equipment
BLOCK DIAGRAM
WOLFSON MICROELECTRONICS plc
www.wolfsonmicro.com
Product Preview, May 2004, Rev 1.0
Copyright
2004
Wolfson Microelectronics plc
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
