The thermometer composed of diode temperature sensors

Published:2011/7/17 20:01:00 Author:Borg | Keyword: thermometer, temperature sensors | From:SeekIC

This is the thermometer composed of diode temperature sensors. In the circuit, R1 and RP1 make VD have a constant current of 0.5mA, R2 and R3 are both the forward feedback resistors, which make the linearity under 2%. In the temperature range of -20-+5O℃, the output sensitivity of A1 is -2OmV/℃. By adjusting RP2, when it is O℃, A2 outputs a voltage of 0V. If the gain of A2 is set to be 5 times, the sensitivity will be 0.1v/℃, which can be connected with the digital multi-meter, so the temperature under test can be read out directly.



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