Product Summary

The ad693aq is a monolithic signal conditioning circuit which accepts low-level inputs from a variety of transducers to control a standard 4–20 mA, two-wire current loop. An on-chip voltage reference and auxiliary amplifier are provided for transducer excitation; up to 3.5 mA of excitation current is available when the ad693aq is operated in the loop-powered mode. Alternatively, the ad693aq may be locally powered for three-wire applications when 0–20 mA operation is desired.

Parametrics

ad693aq absolute maximum ratings: (1)Supply Voltage: +36 V; (2)Reverse Loop Current: 200 mA; (3)Signal Amp Input Range: –0.3 V to VOP; (4)Reference Short Circuit to Common: Indefinite; (5)Auxiliary Amp Input Voltage Range: 0.3 V to VOP; (6)Auxiliary Amp Current Output: 10 mA; (7)Storage Temperature: –65 to +150℃; (8)Lead Temperature, 10 sec Soldering: +300℃; (9)Max Junction Temperature: +150℃.

Features

ad693aq features: (1)Instrumentation Amplifier Front End; (2)Loop-Powered Operation; (3)Precalibrated 30 mV or 60 mV Input Spans; (4)Independently Adjustable Output Span and Zero; (5)Precalibrated Output Spans: 4–20 mA Unipolar, 0–20 mA Unipolar, 12 6 8 mA Bipolar; (6)Precalibrated 100 V RTD Interface; (7)6.2 V Reference with Up to 3.5 mA of Current Available; (8)Uncommitted Auxiliary Amp for Extra Flexibility; (9)Optional External Pass Transistor to Reduce Self-Heating Errors.

Diagrams

ad693aq block diagram

Image Part No Mfg Description Data Sheet Download Pricing
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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
Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
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