Monolithic Thermocouple Amplifiers with Cold Junction Compensation
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FEATURES Pretrimmed for Type J (AD594) or Type K (AD595) Thermocouples Can Be Used with Type T Thermocouple Inputs Low...
Description
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FEATURES Pretrimmed for Type J (AD594) or Type K (AD595) Thermocouples Can Be Used with Type T Thermocouple Inputs Low Impedance Voltage Output: 10 mV/؇ C Built-In Ice Point Compensation Wide Power Supply Range: +5 V to ؎15 V Low Power: <1 mW typical Thermocouple Failure Alarm Laser Wafer Trimmed to 1؇ C Calibration Accuracy Setpoint Mode Operation Self-Contained Celsius Thermometer Operation High Impedance Differential Input Side-Brazed DIP or Low Cost Cerdip
Monolithic Thermocouple Amplifiers with Cold Junction Compensation AD594/AD595
FUNCTIONAL BLOCK DIAGRAM
–IN 14 –ALM 13 +ALM 12 V+ 11 COMP 10 VO 9 FB 8 OVERLOAD DETECT
AD594/AD595
+A
G
G +TC
ICE POINT COMP. –TC
1 +IN
2 +C
3 +T
4 COM
5 –T
6 –C
7 V–
PRODUCT DESCRIPTION
The AD594/AD595 is a complete instrumentation amplifier and thermocouple cold junction compensator on a monolithic chip. It combines an ice point reference with a precalibrated amplifier to produce a high level (10 mV/°C) output directly from a thermocouple signal. Pin-strapping options allow it to be used as a linear amplifier-compensator or as a switched output setpoint controller using either fixed or remote setpoint control. It can be used to amplify its compensation voltage directly, thereby converting it to a stand-alone Celsius transducer with a low impedance voltage output. The AD594/AD595 includes a thermocouple failure alarm that indicates if one or both thermocouple leads become open. The alarm output has a flexible format which i...
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