LM35CAZ/NOPB

The LM35CAZ/NOPB is a precision temperature sensor manufactured by Texas Instruments. It is designed to provide an accurate and linear output voltage that is directly proportional to the temperature in degrees Celsius. Here’s a detailed description of its features and specifications:

General Overview:

• Type: Analog temperature sensor
• Output: Voltage output proportional to temperature
• Temperature Range: Typically from -55°C to +150°C
• Accuracy: ±0.5°C at room temperature (25°C)

Package and Pin Configuration:

• Package Type: The LM35CAZ/NOPB is available in a TO-220 package, which is a metal can package that provides good thermal conductivity and is suitable for various mounting options.
• Pin Count: The device typically has three pins:
  1. Pin 1 (Output): This pin provides the output voltage that corresponds to the temperature.
  2. Pin 2 (V+ or Supply Voltage): This pin is connected to the positive supply voltage, typically ranging from +4V to +30V.
  3. Pin 3 (Ground): This pin is connected to the ground reference of the circuit.

Electrical Characteristics:

• Supply Voltage: The LM35CAZ/NOPB operates on a supply voltage range of +4V to +30V, making it versatile for various applications.
• Output Voltage: The output voltage increases linearly with temperature, with a scale factor of 10 mV/°C. For example, at 25°C, the output voltage would be 250 mV.
• Low Self-Heating: The device has a low self-heating characteristic, typically less than 0.1°C in still air, which ensures that the temperature measurement is accurate and not influenced by the sensor itself.

Applications:

• Temperature Measurement: Ideal for applications requiring precise temperature monitoring, such as HVAC systems, industrial temperature control, and environmental monitoring.
• Thermostats: Used in thermostatic controls for heating and cooling systems.
• Consumer Electronics: Integrated into devices that require temperature sensing, such as refrigerators and ovens.

Advantages:

• Linear Output: The linear relationship between output voltage and temperature simplifies interfacing with analog-to-digital converters (ADCs) and microcontrollers.
• Robustness: The TO-220 package provides durability and ease of mounting in various environments.
• Wide Operating Range: The broad temperature range and supply voltage make it suitable for diverse applications.

Conclusion:

The LM35CAZ/NOPB from Texas Instruments is a reliable and accurate temperature sensor that is widely used in both industrial and consumer applications. Its ease of use, linear output, and low self-heating make it an excellent choice for precise temperature measurement and control.