LMl35 precision temperature measurement circuit

Published:2011/3/21 1:13:00 Author:Joan | Keyword: precision , temperature measurement | From:SeekIC

LMl35 series has equipped with outside correct terminal, which can easily correct measurement error and effectively eliminate the error caused by manufacturing process by simple correction method. As shown in Figure 4, when the temperature is 25 ℃, the adjustment potentiometer Rw changes the calibration terminal bias, until the sensor output voltage turns to 2.982V measured by a digital voltmeter in 20V output range. After calibration, the circuit's measurement error is less than 1 ℃ within the 0 to100C ℃ range.



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