Texas Instruments LM35 Precision Temperature Sensor TO-220 3-Pin

The Texas Instruments LM35 series is a family of precision integrated-circuit temperature sensors, renowned for their linear output voltage directly proportional to the Celsius temperature scale. This design provides a distinct advantage over sensors calibrated in Kelvin, eliminating the need to subtract a large constant voltage from the output to obtain a convenient and readable Celsius measurement.

Notably, the LM35 requires no external calibration or trimming, delivering typical accuracies of ±¼°C at room temperature and ±¾°C across its extensive operating range of -55°C to +150°C. Its combination of low output impedance, linear output, and precise inherent calibration makes interfacing with readout or control circuitry exceptionally straightforward.

The device can operate with single power supplies or with plus and minus supplies. With a remarkably low current draw of only 60 µA, the LM35 exhibits very low self-heating, typically less than 0.1°C in still air, ensuring minimal impact on temperature readings.

Key Features & Benefits

• Calibrated Directly in Celsius: Provides a linear scale factor of +10 mV/°C, simplifying data interpretation.
• High Accuracy: Ensures 0.5°C accuracy at +25°C.
• Low Power Consumption: Draws less than 60 µA, ideal for battery-powered or remote applications.
• Low Output Impedance: 0.1 Ω for a 1 mA load, enabling easy connection to measurement circuits.
• Wide Operating Range: Functions reliably from -55°C to +150°C.
• Robust Package: Housed in a standard TO-220 package with 3 pins for secure mounting and connection.