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.

FEATURES

Low Cost

Operates with Type J (AD596) or Type K (AD597) Thermocouples

Built-In Ice Point Compensation

Temperature Proportional Operation – 10 mV/8C

Temperature Setpoint Operation – ON/OFF

Programmable Switching Hysteresis

High Impedance Differential Input