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AD73311L Datasheet(PDF) 1 Page - Analog Devices |
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AD73311L Datasheet(HTML) 1 Page - Analog Devices |
1 / 36 page REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a AD73311L One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2000 Low Cost, Low Power CMOS General Purpose Analog Front End FUNCTIONAL BLOCK DIAGRAM AD73311L AGND1 AGND2 DGND DVDD AVDD2 AVDD1 VINP VINN VOUTP VOUTN REFCAP REFOUT SDI SDIFS SCLK SDO SDOFS SE MCLK RESET 1-BIT DAC REFERENCE SERIAL I/O PORT INTERPOLATOR DECIMATOR SWITCHED- CAPACITOR LOW-PASS FILTER CONTINUOUS TIME LOW-PASS FILTER +6/–15dB PGA 0/38dB PGA ANALOG SIGMA-DELTA MODULATOR DIGITAL SIGMA-DELTA MODULATOR ANALOG LOOPBACK/ SINGLE-ENDED ENABLE FEATURES 16-Bit A/D Converter 16-Bit D/A Converter Programmable Input/Output Sample Rates 76 dB ADC SNR 77 dB DAC SNR Programmable Sampling Rate 64 kS/s Maximum Sample Rate –90 dB Crosstalk Low Group Delay (25 ms Typ per ADC Channel, 50 ms Typ per DAC Channel) Programmable Input/Output Gain Flexible Serial Port Which Allows Up to Eight Devices to Be Connected in Cascade Single (+3 V) Supply Operation 33 mW Max Power Consumption at 2.7 V On-Chip Reference 20-Lead SOIC/SSOP/TSSOP Packages APPLICATIONS General Purpose Analog I/O Speech Processing Cordless and Personal Communications Telephony Active Control of Sound and Vibration Data Communications GENERAL DESCRIPTION The AD73311L is a complete front-end processor for general purpose applications including speech and telephony. It features a 16-bit A/D conversion channel and a 16-bit D/A conversion channel. Each channel provides 70 dB signal-to-noise ratio over a voiceband signal bandwidth. The final channel bandwidth can be reduced, and signal-to-noise ratio improved, by external digital filtering in a DSP engine. The AD73311L is suitable for a variety of applications in the speech and telephony area, including low bit rate, high quality compression, speech enhancement, recognition and synthesis. The low group delay characteristic of the part makes it suitable for single or multichannel active control applications. The gains of the A/D and D/A conversion channels are program- mable over 38 dB and 21 dB ranges respectively. An on-chip reference voltage is included to allow single supply operation. A serial port (SPORT) allows easy interfacing of single or cas- caded devices to industry standard DSP engines. The AD73311L is available in 20-lead SOIC, SSOP and TSSOP packages. |
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