LM35 Temperature Sensor

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  • Its maximum and minimum input voltages are 35 V and -2 V respectively.
  • It typically operates at 5 V.
  • It can measure temperature from -55°C to 150°C
  • Its Output voltage is directly proportional (Linear) to temperature (i.e.) there will be a rise of 10mV (0.01V) for every 1°C rise in temperature.
  • Its Drain current is less than 60 uA.
  • Its low-cost temperature sensor.
  • It is small and hence suitable for remote applications.
  • It is low self-heating, 0.08 C in still air n Non-linearity only ±1⁄4C typica


  • LM35 is a commonly used temperature sensor, It shows values in the form of output voltages instead of degree Celsius.
  • LM35 shows high voltage values than thermocouples and may not need that the output voltage is amplified.
  • The output voltage of LM35 is proportional to the Celsius temperature. The scale factor is .01 V/°C.
  • One most important characteristic is that it draws just 60 microamps from its supply and acquires a low self-heating capacity.

LM35 has three pinouts which are:

  • PIN 1: Vcc, it used as input at this pin we apply 5 V input voltage.
  • PIN 2: At this pin, we get output voltage.
  • PIN 3: This pin is used for ground.