22-Bit Data Acquisition System - Analog Devices
Description
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FEATURES 22-Bit Sigma-Delta ADC
Dynamic Range of 105 dB (146 Hz Input) ؎0.
003% Integral Nonlinearity On-Chip Low-Pass Digital Filter Cutoff Programmable from 584 Hz to 36.
5 Hz Linear Phase Response Five Line Serial I/O Twos Complement Coding Easy Interface to DSPs and Microcomputers Software Control of Filter Cutoff ؎5 V Supply Low Power Operation: 50 mW
APPLICATIONS Biomedical Data Acquisition
ECG Machines EEG Machines Process Control High Accuracy Instrumentation Seismic Systems
LC2MOS 22-Bit Data Acquisition System
AD7716
FUNCTIONAL BLOCK DIAGRAM
AVDD DVDD AVSS RESET A0 A1 A2 CLKIN CLKOUT
AIN 1
AD7716
ANALOG MODULATOR
LOW PASS DIGITAL FILTER
AIN 2
ANALOG MODULATOR
LOW PASS DIGITAL FILTER
AIN 3
ANALOG MODULATOR
LOW PASS DIGITAL FILTER
AIN 4
ANALOG MODULATOR
LOW PASS DIGITAL FILTER
CLOCK GENERATION
CONTROL LOGIC
OUTPUT SHIFT
REGISTER
CONTROL REGISTER
MODE CASCIN CASCOUT
RFS SDATA SCLK
DRDY
TFS
VREF AGND DGND
DIN 1 DOUT1 DOUT2
GENERAL DESCRIPTION The AD7716 is ...
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