Datasheet AD73311 (Analog Devices)

a
Low Cost, Low Power CMOS General Purpose Analog Front End AD73311 FEATURES GENERAL DESCRIPTION 16-Bit A/D Converter
The AD73311 is a complete front-end processor for general
16-Bit D/A Converter
purpose applications including speech and telephony. It features
Programmable Input/Output Sample Rates
a 16-bit A/D conversion channel and a 16-bit D/A conversion
75 dB ADC SNR
channel. Each channel provides 70 dB signal-to-noise ratio over
70 dB DAC SNR
a voiceband signal bandwidth. The final channel bandwidth can
64 kS/s Maximum Sample Rate
be reduced, and signal-to-noise ratio improved, by external
–90 dB Crosstalk
digital filtering in a DSP engine.
Low Group Delay (25
␮
s Typ per ADC Channel,
The AD73311 is suitable for a variety of applications in the
50
␮
s Typ per DAC Channel)
speech and telephony area including low bit rate, high quality
Programmable Input/Output Gain
compression, speech enhancement, recognition and synthesis.
Flexible Serial Port which Allows up to 8 Devices
The low group delay characteristic of the part makes it suitable
to Be Connected in Cascade
for single or multichannel active control applications.
Single (+2.7 V to +5.5 V) Supply Operation 50 mW Max Power Consumption at 2.7 V
The gains of the A/D and D/A conversion channels are pro-
On-Chip Reference
grammable over 38 dB and 21 dB ranges respectively. An
20-Lead SOIC/SSOP Package
on-chip reference voltage is included to allow single supply operation. A serial port (SPORT) allows easy interfacing of
APPLICATIONS
single or cascaded devices to industry standard DSP engines.
General Purpose Analog I/O
The AD73311 is available in both 20-lead SOIC and SSOP
Speech Processing
packages.
Cordless and Personal Communications Telephony Active Control of Sound & Vibration Data Communications FUNCTIONAL BLOCK DIAGRAM AVDD1 AVDD2 DVDD SDI VINP SDIFS ANALOG 0/38dB SIGMA-DELTA DECIMATOR PGA MODULATOR SCLK VINN SERIAL SDO I/O PORT SDOFS VOUTP CONTINUOUS SWITCHED- DIGITAL 1-BIT +6/–15dB SE TIME CAPACITOR DAC SIGMA-DELTA INTERPOLATOR PGA LOW-PASS FILTER LOW-PASS FILTER MODULATOR VOUTN MCLK RESET REFCAP REFERENCE AD73311 REFOUT AGND1 AGND2 DGND
REV. B 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
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