LM35 Temperature Sensor

LM35 Temperature Sensor




The LM35 Temperature Sensor is an integrated circuit-based sensor that generates an analog voltage proportional to the temperature of the immediate surrounding area. It is commonly available in a TO-92 package just like a typical small-signal transistor.

Specifically, the LM35 outputs a voltage that is proportional to the temperature in degrees Celsius with 10 millivolts/°C. So, for example, if output voltage is 300mV, the ambient temperature is 30°C. If output voltage is 500mV, ambient temperature is 50°C, and so on. The sensor output is guaranteed to be accurate within 0.5° of the actual temperature.

The LM35 temperature sensor does not require any external calibration or trimming. The LM35C is rated to operate at -40°C to +100 °C and the LM35D at 0°C to 100°C.