LM50 - National Semiconductor

LM50 SOT-23 Single-Supply Centigrade Temperature Sensor

The LM50 is a precision integrated-circuit temperature sensor that can sense a −40˚C to +125˚C temperature range using a single positive supply. The LM50’s output voltage is linearly proportional to Celsius (Centigrade) temperature (+10 mV/˚C) and has a DC offset of +500 mV. The offset allows reading negative temperatures without the need for a negative supp.

Features

n n n n n n n n n n Calibrated directly in degree Celsius (Centigrade) Linear + 10.0 mV/˚C scale factor ± 2˚C accuracy guaranteed at +25˚C Specified for full −40˚ to +125˚C range Suitable for remote applications Low cost due to wafer-level trimming Operates from 4.5V to 10V Less than 130 µA current drain Low self-heating, less than 0.2˚C in still air Nonlinearity less than 0.8˚C over temp Connection Diagram SOT-23 Order Number LM50BIM3 LM50CIM3 DS012030-1 SOT-23 Device Marking T5B T5C T5B T5C Supplied As 1000 Units on Tape and Reel 1000 Units on Tape and Reel 3000 Units on Tape and Reel 300.