LM35 Precision Centigrade Temperature Sensor IC (TO-92)
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Prices updated: 13 Oct 2026
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About this product
The LM35 is a factory-calibrated analog temperature sensor in a 3-pin TO-92 package. Its output voltage rises linearly at 10mV per degree Celsius, so a microcontroller ADC can convert the reading to temperature with simple math and no lookup tables. Used in weather stations, battery monitoring, and general temperature logging projects.
Specifications
- Package
- TO-92, 3-pin
- Accuracy
- ±0.4°C at 25°C
- Output Type
- Analog, 10mV/°C
- Supply Voltage
- 4V to 30V
- Measuring Range
- 0°C to +100°C
- Supply Current
- Under 60µA
Frequently asked questions
How do I read the temperature with an Arduino?
Connect the Vout pin to an analog input such as A0 and read it with analogRead(). With a 5V reference and a 10-bit ADC, convert the raw value to temperature using: temperature (°C) = (raw × 5.0 / 1023) × 100.
What is the pinout of the TO-92 package?
With the flat face of the package toward you and the pins pointing down, the pins from left to right are +Vs (supply), Vout (analog output), and GND. Always confirm against the marking and datasheet before powering the sensor.
