High_noise_rejection_thermometer

Published:2009/7/24 2:44:00 Author:Jessie | From:SeekIC

Pig. 13-26 This circuit makes it possible to transmit the temperature sensor output directly over an unshielded wire, with high noise immunity. Once calibrated with sensor and connecting wires in place, the circuit provides a typical ±2.0℃ accuracy-even in high-noise environments. To calibrate the thermometer, place the op-amp sensor in a +1℃ environment, and trim the 10℃ adjustment for an appropriate meter indication. Next, place the sensor in a +40℃ environment, and trim the 40℃ adjustment. Repeat the procedure until both points are fixed. Linear Technology Linear Applications Handbook 1990 p AN9-17.



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