LM35DZ/LFT1 Precision Centigrade Temperature Sensor

The LM35DZ/LFT1 is a precision integrated-circuit temperature sensor from Texas Instruments that offers a linearly proportional voltage output to the Centigrade temperature. It is an essential component for a wide range of temperature monitoring applications. The LM35 series are precision temperature sensors which can be easily calibrated. They provide a voltage output that is directly proportional to the Celsius temperature, making it inherently immune to noise and other disturbances.

Key Features:

• Accurate Measurements: The LM35DZ/LFT1 has a temperature range of -55°C to +150°C with an ensured accuracy of ±0.5°C at room temperature and ±0.75°C over a range of -55°C to +150°C.
• Low Voltage Operation: It operates from 4V to 30V and only draws 60 µA current, making it ideal for battery-powered applications.
• Calibrated Directly in Celsius: The output voltage is 10mV/°C, eliminating the need for additional calibration to measure temperatures in Celsius.
• Low Self-Heating: Its low self-heating, less than 0.1°C in still air, prevents it from affecting the temperature reading.
• Non-linearity: The sensor has a typical non-linearity of only ±0.25°C, ensuring precise readings across its full operating range.

Applications:

• Environmental controls
• Temperature monitoring systems
• HVAC systems
• Automotive temperature control
• Medical equipment
• Process control and industrial automation
• Consumer electronics

Advantages:

The LM35DZ/LFT1 temperature sensor is preferred over linear temperature sensors calibrated in Kelvin, as the user is not required to subtract a large constant voltage from the output to obtain convenient Centigrade scaling. Moreover, the LM35DZ/LFT1 does not require any external calibration or trimming to provide typical accuracies. Its low output impedance, linear output, and precise inherent calibration make interfacing to readout or control circuitry especially easy.