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LM35 Temperature Sensor

The LM35 is a precision integrated-circuit temperature sensor with an output voltage linearly proportional to the Celsius temperature. It accurately measures temperatures ranging from -55°C to +150°C with a linear scale factor of 10mV/°C. This sensor is widely used in various temperature sensing applications due to its simplicity, accuracy, and ease of integration.

LM35 Temperature Sensor Key Features

  • Linear output voltage proportional to Celsius temperature
  • Wide temperature measurement range: -55°C to +150°C
  • High accuracy and stability
  • Low self-heating capability
  • Low output impedance
  • Calibrated directly in Celsius (without requiring additional components)
  • Easily interfaced with microcontrollers, ADCs, and other circuitry

Specifications

  • Operating Temperature Range: -55°C to +150°C
  • Output Voltage Range: 0 mV to 1.5V (corresponding to -55°C to +150°C)
  • Output Voltage Scale Factor: 10 mV/°C
  • Accuracy: ±0.5°C (typical) at 25°C
  • Supply Voltage: 4V to 30V
  • Low Quiescent Current: 60 µA (typical)
  • Output Impedance: 0.1 ohms (typical)

Applications

  • Environmental monitoring systems
  • HVAC (Heating, Ventilation, and Air Conditioning) control systems
  • Industrial temperature control
  • Automotive temperature sensing
  • Medical equipment
  • Consumer electronics

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