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AD73311AR 参数 Datasheet PDF下载

AD73311AR图片预览
型号: AD73311AR
PDF下载: 下载PDF文件 查看货源
内容描述: 低成本,低功耗CMOS通用模拟前端 [Low Cost, Low Power CMOS General Purpose Analog Front End]
分类和应用:
文件页数/大小: 36 页 / 333 K
品牌: AD [ ANALOG DEVICES ]
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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 pro-
grammable 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
SWITCHED-
CAPACITOR
LOW-PASS FILTER
1-BIT
DAC
DIGITAL
SIGMA-DELTA
MODULATOR
INTERPOLATOR
ANALOG
SIGMA-DELTA
MODULATOR
SDIFS
DECIMATOR
SCLK
SDO
SDOFS
SE
MCLK
REFERENCE
RESET
AD73311
AGND2
DGND
AGND1
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
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