WM8768 Datasheet, PDF (1/38 Pages) Wolfson Microelectronics plc – 24-bit, 192kHz 8-Channel DAC

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24-bit, 192kHz 8-Channel DAC
WM8768
DESCRIPTION
The WM8768 is a multi-channel audio DAC ideal for DVD
and surround sound processing applications for home hi-fi,
automotive and other audio visual equipment.
Four stereo 24-bit multi-bit sigma delta DACs are used with
oversampling digital interpolation filters. Digital audio input
word lengths from 16-32 bits and sampling rates from 8kHz
to 192kHz are supported. Each DAC channel has
independent digital volume and mute control.
The audio data interface supports I²S, left justified, right
justified and DSP digital audio formats.
The device is controlled either via a 3 wire serial interface or
directly using the hardware interface. These interfaces
provide access to features including channel selection,
volume controls, mutes, de-emphasis and power
management facilities. The device is available in a 28-pin
SSOP.
BLOCK DIAGRAM
FEATURES
• 8-Channel DAC with PCM.
• Audio Performance
− 103dB SNR (‘A’ weighted @ 48kHz) DAC
• DAC Sampling Frequency: 8kHz – 192kHz
• 3-Wire SPI Serial or Hardware Control Interface
• Programmable Audio Data Interface Modes
− I²S, Left, Right Justified or DSP
− 16/20/24/32 bit Word Lengths
• Four Independent stereo DAC outputs with independent
digital volume controls
• Master or Slave Audio Data Interface
• 2.7V to 5.5V Analogue, 2.7V to 3.6V Digital supply
Operation
• 28 pin SSOP Package
APPLICATIONS
• DVD Players
• Surround Sound AV Processors and Hi-Fi systems
• Automotive Audio
MCLK
LRCLK
BCLK
DIN1
DIN2
DIN3
DIN4
VREFNVREFP
STEREO
DAC
DIGITAL AUDIO
INTERFACE
&
DIGITAL FILTERS
STEREO
DAC
STEREO
DAC
LOW
PASS
FILTER
LOW
PASS
FILTER
LOW
PASS
FILTER
CONTROL INTERFACE
STEREO
DAC
LOW
PASS
FILTER
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WM8768
VOUT1L
VOUT1R
VOUT2L
VOUT2R
VOUT3L
VOUT3R
VOUT4L
VOUT4R
WOLFSON MICROELECTRONICS plc
w :: www.wolfsonmicro.com
Production Data, March 2005, Rev 4.1
Copyright 2005 Wolfson Microelectronics plc