AD7713 Analog Devices, AD7713 Datasheet - Page 26

• Manufacturer Part Number: AD7713
• Description: CMOS, Low Power 24-Bit Sigma-Delta, Signal Conditioning ADC with Matched RTD Current Sources
• Manufacturer: Analog Devices

Specifications of AD7713

• Resolution (bits): 24bit
• # Chan: 3
• Sample Rate: 3.9kSPS
• Interface: Ser
• Analog Input Type: Diff-Bip,Diff-Uni,SE-Uni
• Ain Range: (2Vref/PGA Gain) p-p,Uni (Vref) x 4,Uni (Vref)/(PGA Gain)
• Adc Architecture: Sigma-Delta
• Pkg Type: DIP,SOIC

AD7713
AD7712
FEATURES
Charge Balancing ADC
High Level and Low Level Analog Input Channels
Programmable Gain for Both Inputs
Low-Pass Filter with Programmable Filter Cutoffs
Ability to Read/Write Calibration Coefficients
Bidirectional Microcontroller Serial Interface
Internal/External Reference Option
Single- or Dual-Supply Operation
Low Power (25 mW typ) with Power-Down Mode
APPLICATIONS
Process Control
Smart Transmitters
Portable Industrial Instruments
24 Bits No Missing Codes
Gains from 1 to 128
Differential Input for Low Level Channel
(100 W typ)
0.0015% Nonlinearity
–26–
AIN1(+)
AIN1(–)
AIN2
TP
AGND DGND
AV
AV
ATTENUATION
AD7712
DD
DD
VOLTAGE
FUNCTIONAL BLOCK DIAGRAM
DV
4.5 A
DD
V
SS
IN(–)
REF
A = 1 – 128
PGA
RFS
IN(+)
REF
REGISTER
CONTROL
TFS
CHARGING BALANCING A/D
AUTO-ZEROED
MODULATOR
MODE SDATA
SERIAL INTERFACE
V
BIAS
CONVERTER
–
2.5V REFERENCE
GENERATION
SCLK
REGISTER
CLOCK
OUTPUT
REF OUT
DIGITAL
FILTER
DRDY
A0
SYNC
STANDBY
MCLK
IN
MCLK
OUT
REV. D