LM35 outputs a voltage proportional to temperature.

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LM35 outputs a voltage proportional to temperature.

Voltage output proportional to temperature. The LM35 is an analog temperature sensor that provides a voltage that increases with temperature—roughly 10 millivolts for every degree Celsius. So at 25°C you’d read about 250 mV, and at 0°C about 0 V. Because the relationship is linear, you can simply read Vout with an ADC and convert back to temperature with a straightforward calculation (temperature in °C ≈ Vout in volts divided by 0.01). It’s not a current-output device and it isn’t digital, so there’s no data stream to read—just a voltage. The LM35 is factory-calibrated for direct use, though you can apply system-level calibration if you need tighter accuracy in a particular setup. It uses three pins: power, ground, and the analog output.

Voltage output proportional to temperature. The LM35 is an analog temperature sensor that provides a voltage that increases with temperature—roughly 10 millivolts for every degree Celsius. So at 25°C you’d read about 250 mV, and at 0°C about 0 V. Because the relationship is linear, you can simply read Vout with an ADC and convert back to temperature with a straightforward calculation (temperature in °C ≈ Vout in volts divided by 0.01). It’s not a current-output device and it isn’t digital, so there’s no data stream to read—just a voltage. The LM35 is factory-calibrated for direct use, though you can apply system-level calibration if you need tighter accuracy in a particular setup. It uses three pins: power, ground, and the analog output.

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