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XWM8706EDS Datasheet

  • XWM8706EDS

  • 24-bit, 192kHz Stereo DAC with Volume Control

  • 24頁(yè)

  • WOLFSON

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WM8706
24-bit, 192kHz Stereo DAC with Volume Control
Product Preview, Rev 1.2, April 2001
DESCRIPTION
The WM8706 is a high performance stereo DAC designed
for audio applications such as DVD, home theatre systems,
and digital TV. The WM8706 supports data input word
lengths from 16 to 32-bits and sampling rates up to 192kHz.
The WM8706 can implement 2 channels at 192kHz for high-
end DVD-Audio. The WM8706 consists of a serial interface
port, digital interpolation filters, multi-bit sigma delta
modulators and stereo DAC in a small 28-pin SSOP
package. The WM8706 also includes a digitally controllable
mute and attenuate function on each channel.
The WM8706 supports a variety of connection schemes for
audio DAC control. The MPU serial port provides access to
a wide range of features including on-chip mute, attenuation
and phase reversal. A hardware controllable interface is
also available. It is pin-compatible with the WM8716
provided the oscillator circuit on WM8716 is not required in
the application.
The WM8706 is an ideal device to interface to AC-3錚?
DTS錚? and MPEG audio decoders for surround sound
applications, or for use in DVD players supporting DVD-A.
FEATURES
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Stereo DAC
Audio Performance
-
106dB SNR (鈥楢鈥?weighted @ 48kHz) DAC
-
-97dB THD
DAC Sampling Frequency: 8kHz 鈥?192kHz
3-Wire Serial Control Interface or Hardware Control
Programmable Audio Data Interface Modes
-
I
2
S, Left, Right Justified, DSP
-
16/20/24/32 bit Word Lengths
Independent Digital Volume Control on Each Channel with
127.5dB Range in 0.5dB Steps
3.0V 鈥?5.5V Supply Operation
28-Pin SSOP Package
Exceeds Dolby Class A Performance Requirements
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APPLICATIONS
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DVD-Audio and DVD 鈥楿niversal鈥?Players
Home theatre systems
Digital TV
Digital broadcast receivers
BLOCK DIAGRAM
MODE
MLIIS
MCDM1 MDDM0 MUTEB CSBIWO
ZERO
CONTROL INTERFACE
WM8706
BCKIN
LRCIN
DIN
SERIAL
INTERFACE
MUTE/
ATTEN
DIGITAL FILTERS
MUTE/
ATTEN
SIGMA
DELTA
MODULATOR
RIGHT
DAC
LOW
PASS
FILTER
VOUTR
SIGMA
DELTA
MODULATOR
LEFT
DAC
LOW
PASS
FILTER
VOUTL
VMID
XTI
AVDD DVDD
VREFP VREFN
AGND
DGND
WOLFSON MICROELECTRONICS LTD
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: +44 (0) 131 667 9386
Fax: +44 (0) 131 667 5176
Email: sales@wolfson.co.uk
www.wolfsonmicro.com
Product Preview
data sheets contain
specifications for products in the formative
phase of development. These products may
be changed or discontinued without notice.
餂?001
Wolfson Microelectronics Ltd
.

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