LM35 Temperature Sensor

LM35 is a precession Integrated circuit Temperature sensor, whose output voltage varies, based on the temperature around it. It is a small and cheap IC which can be used to measure temperature anywhere between -55C to 150C. It can easily be interfaced with any Microcontroller that has ADC function or any development platform like Arduino.

Power the IC by applying a regulated voltage like +5V (V) to the input pin and connected the ground pin to the ground of the circuit.

LM35 Regulator Features:

• Minimum and Maximum Input Voltage is 35V and -2V respectively. Typically 5V.
• Can measure temperature ranging from -55C to 150C
• Output voltage is directly proportional (Linear) to temperature (i.e.) there will be a rise of 10mV (0.01V) for every 1C rise in temperature.
• ±0.5C Accuracy
• Drain current is less than 60uA
• Low cost temperature sensor
• Small and hence suitable for remote applications
• Available in TO-92, TO-220, TO-CAN and SOIC package

LM35 Temperature Sensor Applications:

• Measuring temperature of a particular environment
• Providing thermal shutdown for a circuit/component
• Monitoring Battery Temperature
• Measuring Temperatures for HVAC applications.