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WM9709 Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM9709 Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 18 page  w WM9709 AC-link Interface Audio DAC WOLFSON MICROELECTRONICS plc w :: www.wolfsonmicro.com Production Data, February 2003, Rev 1.3 Copyright 2003 Wolfson Microelectronics plc 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 ’97 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. FEATURES • 20-Bit Stereo DAC • Audio Performance − 102dB SNR (‘A’ weighted at 48kHz) − -95dB THD • Revision 1.03 or higher AC’97 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 APPLICATIONS • Notebook PC • PC sound cards • Motherboards • Custom sound applications BLOCK DIAGRAM LINEOUTR SERIAL INTERFACE SDATAOUT LINEOUTL SIGMA DELTA MODULATOR SDATAIN BITCLK SIGMA DELTA MODULATOR DIGITAL FILTERS DVDD AGND DGND LOW PASS FILTER LOW PASS FILTER CAP RIGHT DAC LEFT DAC AGND AVDD SYNC RESETB XTLIN XTLOUT ID w WM9709 |
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