LM35 Temperature Sensor, Analogue Output, TO-92, 3 Pins

The LM35 is a precision integrated-circuit temperature sensor from Texas Instruments, delivering an output voltage that is linearly proportional to temperature in degrees Centigrade. Unlike linear sensors calibrated in Kelvin, the LM35 requires no large constant voltage subtraction to achieve convenient Centigrade scaling, simplifying readout and control circuitry integration.

This sensor provides typical accuracies of ±¼°C at room temperature and ±¾°C over the full −55°C to +150°C temperature range, with no external calibration or trimming. Its low output impedance (0.1 Ω for a 1 mA load), linear output, and precise inherent calibration make interfacing with analogue-to-digital converters or control systems straightforward. The device operates from single power supplies or dual (plus and minus) supplies.

Key Features

• Calibrated directly in Celsius (linear + 10 mV/°C scale factor)
• Ensured accuracy of ±0.5°C at +25°C
• Suitable for remote applications
• Less than 60-µA current drain (only 60 µA typical)
• Low self-heating: less than 0.1°C in still air
• Low impedance output, 0.1 Ω for 1 mA load

Technical Specifications

• Sensor output type: Analogue
• IC output type: Voltage
• Sensing accuracy range: ±0.6°C
• Accuracy: ±0.5°C
• Sensing temperature min: 0°C
• Sensing temperature max: +100°C
• Supply voltage min: 4V
• Supply voltage max: 30V
• Sensor case / package: TO-92
• No. of pins: 3
• Package: TO-92
• Weight: 0.277g

The LM35 is ideal for a wide range of temperature sensing applications, offering reliable, precise performance with minimal power consumption.