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WM8775SEDS/V

Description
audio A/D converter ics stereo adc with 4-channel mux
Categorysemiconductor    Other integrated circuit (IC)   
File Size341KB,40 Pages
ManufacturerWolfson Microelectronics plc (Cirrus Logic)
Websitehttp://www.wolfson.co.uk
Environmental Compliance
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WM8775SEDS/V Overview

audio A/D converter ics stereo adc with 4-channel mux

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DESCRIPTION
The WM8775 is a high performance, stereo audio ADC
with a 4 channel input mixer. The WM8775 is ideal for
digitising multiple analogue sources for surround sound
processing applications for home hi-fi, automotive and
other audio visual equipment.
A stereo 24-bit multi-bit sigma delta ADC is used with a
four stereo channel input selector. Each channel has
programmable gain control. Digital audio output word
lengths from 16-32 bits and sampling rates from 32kHz
to 96kHz are supported.
The audio data interface supports I S, left justified, right
justified and DSP digital audio formats.
The device is controlled via a 2 or 3 wire serial interface.
The interface provides access to all features including
channel selection, volume controls, mutes, de-emphasis
and power management facilities.
The device is available in a 28-lead SSOP package. The
WM8775 is software compatible with the WM8776.
2
WM8775
24-bit, 96kHz ADC with 4 Channel I/P Multiplexer
FEATURES
Audio Performance
102dB SNR (‘A’ weighted @ 48kHz)
-90dB THD
ADC Sampling Frequency: 32kHz – 96kHz
Four stereo ADC inputs with analogue gain adjust from
+24dB to –21dB in 0.5dB steps
Digital gain adjust from -21.5dB to -103dB.
Programmable Automatic Level Control (ALC) or Limiter on
ADC input
3-Wire SPI Compatible or 2-wire Serial Control Interface
Master or Slave Clocking Mode
Programmable Audio Data Interface Modes
I
2
S, Left, Right Justified or DSP
16/20/24/32 bit Word Lengths
2.7V to 5.5V Analogue, 2.7V to 3.6V Digital supply Operation
APPLICATIONS
Surround Sound AV Processors and Hi-Fi systems
Automotive Audio
BLOCK DIAGRAM
ADC R EF GND
AD CR EF P
VM IDAD C
AGN D
AVD D
AINOPL
AINOPR
AINVGL
AINVGR
W
WM8775
AIN1L
AIN1R
AIN2L
AIN2R
AIN3L
AIN3R
AIN4L
AIN4R
IN PU T MIXE R
AUDIO INTERFACE
STEREO
ADC
VMID
ALC
AND
DIGITAL FILTERS
MCLK
DOUT
ADCLRC
BCLK
CONTROL INTERFACE
D GN D
D VD D
CL
M ODE
CE
WOLFSON MICROELECTRONICS plc
To receive regular email updates, sign up at http://www.wolfsonmicro.com/enews/
DI
Production Data, October 2008, Rev 4.4
Copyright
©2008
Wolfson Microelectronics plc

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