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AD73311

Part Number	AD73311
Manufacturer	Analog Devices
Description	Low Cost/ Low Power CMOS General Purpose Analog Front End
Published	Mar 23, 2005
Detailed Description	a FEATURES 16-Bit A/D Converter 16-Bit D/A Converter Programmable Input/Output Sample Rates 75 dB ADC SNR 70 dB DAC SNR ...
Datasheet	AD73311 PDF File

Overview

a FEATURES 16-Bit A/D Converter 16-Bit D/A Converter Programmable Input/Output Sample Rates 75 dB ADC SNR 70 dB DAC SNR 64 kS/s Maximum Sample Rate –90 dB Crosstalk Low Group Delay (25 ␮ s Typ per ADC Channel, 50 ␮s Typ per DAC Channel) Programmable Input/Output Gain Flexible Serial Port which Allows up to 8 Devices to Be Connected in Cascade Single (+2.
7 V to +5.
5 V) Supply Operation 50 mW Max Power Consumption at 2.
7 V On-Chip Reference 20-Lead SOIC/SSOP Package APPLICATIONS General Purpose Analog I/O Speech Processing Cordless and Personal Communications Telephony Active Control of Sound & Vibration Data Communications Low Cost, Low Power CMOS General Purpose Analog Front End AD73311 GENERAL DESCRIPTION The AD73311 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 AD73311 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 programmable 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 cascaded devices to industry standard DSP engines.
The AD73311 is available in both 20-lead SOIC and SSOP packages.
FUNCTIONAL BLOCK DIAGRAM AVDD1 AVDD2 DVDD SDI VINP 0/38dB PGA VINN SERIAL I/O PORT VOUTP +6/–15dB PGA VOUTN REFCAP REFOUT CONTINUOUS TIME LOW-PASS FILTER SWITCHEDCAPACITOR LOW-PASS FILTER 1-BIT DAC DIGITAL SIGMA-D...

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