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FEATURES Low Cost Operates with Type J (AD596) or Type K (AD597) Thermocouples Built-In Ice Point Compensation Tempera...
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FEATURES Low Cost Operates with Type J (AD596) or Type K (AD597) Thermocouples Built-In Ice Point Compensation Temperature Proportional Operation – 10 mV/؇ C Temperature Setpoint Operation – ON/OFF Programmable Switching Hysteresis High Impedance Differential Input
Thermocouple Conditioner and Setpoint Controller AD596*/AD597*
FUNCTIONAL BLOCK DIAGRAM TO-100
–ALM –IN +ALM
+IN ICE POINT COMP
– G + – G + + +A
V+
GENERAL DESCRIPTION
The AD596/AD597 is a monolithic temperature setpoint controller that has been optimized for use at elevated temperatures such as those found in oven control applications. The device cold junction compensates and amplifies a type J or K thermocouple input to derive an internal signal proportional to temperature. The internal signal is then compared with an externally applied setpoint
voltage to yield a low impedance switched output
voltage. Dead-Band or switching hysteresis can be programmed using a single external resistor. Alternately, the AD596/AD597 can be configured to provide a
voltage output (10 mV/°C) directly from a type J or K thermocouple signal. It can also be used as a standalone
voltage output temperature sensor. The AD596/AD597 can be powered with a single supply from +5 V to +30 V, or dual supplies up to a total span of 36 V. Typical quiescent supply current is 160 µA, which minimizes self-heating errors. The AD596/AD597 H package option includes a thermocouple failure alarm that indicates an open thermocouple lead when operate...