LM135 temperature telemetry circuit

Published:2011/3/21 1:46:00 Author:Joan | Keyword: LM135 , temperature telemetry | From:SeekIC

When the measurement point is far away from the display meter, the voltage drop caused by the sensor's operating current in the connection conductor, superimposed on the output voltage on the sensor, will produce some measurement error. To eliminate the effect of the resistance of connecting wires, the circuit can be used as shown in Figure 5. By the use of constant current source driver LMl35, the sensor operating current is constant, and the connection lead resistance is fixed, then the voltage drop across the wire is a certain value, which can be corrected by calibration terminal to ensure the accuracy of measurements.



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