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The lm35 series are precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the celsius (centigrade) temperature. The lm35 thus has an advantage over linear temperature sensors calibrated in -2da. kelvin, as the user is not required to subtract a large constant voltage from its output to obtain convenient centigrade scaling. The lm35 does not require any external calibration or trimming to provide typical accuracies of ±1-2044. 4-2da. c at room temperature and ±3-2044. 4-2da. c over a full -55 to +150-2da. c temperature range.