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WM9709CDS/R Datasheet

  • WM9709CDS/R

  • AC LINK INTERFACE AUDIO DAC

  • 159.87KB

  • 18頁

  • WOLFSON

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AC-link Interface Audio DAC
DESCRIPTION
The WM9709 is a low cost, high-quality stereo audio DAC.
It utilises the Intel specified AC-link audio interface protocol,
allowing a pair of audio output channels to be added to any
AC link compliant controller device at minimal board area
and external component cost.
The WM9709 device supports 48ks/s sample rates when
operated at the normal AC link rate. The WM9709 supports
a revision 1.03 AC 鈥?7 AC-link interface, the device acting
as a master in normal operation.
The ID pin can be used to select which data slots on the
AC-link are to be used as input to the DAC. This allows 3 x
WM9709 to be used with a single controller that supports 6
channel sound, to output surround sound audio signals.
When supporting surround, centre or LFE channels, the
WM9709 behaves as a slave device.
The WM9709 device is footprint compatible with the
WM9708 codec, allowing simple swapping between DAC
and full codec features on the same board. The WM9709 is
packaged in a 20-pin SSOP.
WM9709
FEATURES
鈥?/div>
鈥?/div>
20-Bit Stereo DAC
Audio Performance
鈭?/div>
102dB SNR (鈥楢鈥?weighted at 48kHz)
鈭?/div>
-95dB THD
Revision 1.03 or higher AC鈥?7 AC-link interface support.
3.3V or mixed 3V digital, 5V analogue operation
20-Pin SSOP Package
Minimal external component cost
Support for surround and centre/LFE channels
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
APPLICATIONS
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Notebook PC
PC sound cards
Motherboards
Custom sound applications
BLOCK DIAGRAM
w
WM9709
ID
RESETB
SDATAOUT
SDATAIN
BITCLK
SYNC
SERIAL
INTERFACE
SIGMA
DELTA
MODULATOR
DIGITAL FILTERS
SIGMA
DELTA
MODULATOR
LEFT
DAC
LOW
PASS
FILTER
LINEOUTL
RIGHT
DAC
LOW
PASS
FILTER
LINEOUTR
CAP
XTLIN XTLOUT
DVDD DGND
AVDD AGND
AGND
WOLFSON MICROELECTRONICS plc
w :: www.wolfsonmicro.com
Production Data, February 2003, Rev 1.3
Copyright
餂?003
Wolfson Microelectronics plc

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