Product Summary

The AD694AQ is a monolithic current transmitter that accepts high level signal inputs to drive a standard 4–20 mA current loop for the control of valves, actuators, and other devices commonly used in process control. The input signal of the AD694AQ is buffered by an input amplifier that can be used to scale the input signal or buffer the output from a current mode DAC. Precalibrated input spans of 0 V to 2 V and 0 V to 10 V are selected by simple pin strapping; other spans may be programmed with external resistor.

Parametrics

AD694AQ absolute maximum ratings: (1)Supply Voltage: +36 V; (2)VS to IOUT: +36 V; (3)Input Voltage: –0.3 V to +36 V; (4)Reference Short Circuit to Common: Indefinite; (5)Alarm Voltage, Pin 10: +36 V; (6)4 mA Adj, Pin 6: +1 V; (7)4 mA On/Off, Pin 9: 0 V to 36 V; (8)Storage Temperature Range: –65℃ to +150℃; (9)Lead Temperature, 10 sec Soldering: +300℃; (10)Maximum Junction Temperature: +150℃; (11)Maximum Case Temperature Plastic Package (N, R): +125℃; (12)Cerdip Package (Q): +125℃.

Features

AD694AQ features: (1)4–20 mA, 0–20 mA Output Ranges; (2)Precalibrated Input Ranges: 0 V to 2 V, 0 V to 10 V; (3)Precision Voltage Reference. Programmable to 2.000 V or 10.000 V; (4)Single or Dual Supply Operation; (5)Wide Power Supply Range: +4.5 V to +36 V; (6)Wide Output Compliance; (7)Input Buffer Amplifier; (8)Open-Loop Alarm; (9)Optional External Pass Transistor to Reduce. Self-Heating Errors; (10)0.002% typ Nonlinearity.

Diagrams

AD694AQ functional block diagram

Image Part No Mfg Description Data Sheet Download Pricing
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AD694AQ
AD694AQ


IC SGNL COND 4-20MA TX 16-CDIP

Data Sheet

0-25: $8.97
Image Part No Mfg Description Data Sheet Download Pricing
(USD)
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AD693
AD693

Other


Data Sheet

Negotiable 
AD693AD
AD693AD


IC SGNL COND 4-20MA TX 20-CDIP

Data Sheet

0-1: $17.52
1-10: $16.20
10-100: $13.84
100-250: $12.70
250-500: $12.09
500-1000: $11.68
AD693AE
AD693AE


IC SGNL COND 4-20MA TX 20-CLCC

Data Sheet

0-1: $19.21
1-10: $17.77
AD693AQ
AD693AQ


IC TRANSMITTER 4-20MA 20-CDIP

Data Sheet

0-1: $11.38
1-10: $10.35
10-100: $8.79
100-250: $8.02
250-500: $7.50
500-1000: $6.90
AD694
AD694

Other


Data Sheet

Negotiable 
AD694AQ
AD694AQ


IC SGNL COND 4-20MA TX 16-CDIP

Data Sheet

0-25: $8.97