LM35CH

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Temperature Sensors - Analog and Digital Output include LM35CH.

Utilising the properties of resistors, detectors, transistors, and other active and passive components, temperature sensors provide the industrial and scientific world with the accurate and precise data to control and monitor systems. The LM35 series of IC temperature sensors come in different versions and provide an output that can be connected directly to an analogue-to-digital converter. Each of these components uses a different mechanism to generate the output, but all use the same basic principles.

The LM35CH comes in a three-pin TO-92 package, and works by measuring the temperature-induced changes in an on-board integrated circuit. This is achieved by using a forward biased circuit that acts as a voltage-divider. One leg of the voltage divider is connected to the integrated circuit, while the other is connected to a resistive element. As the temperature changes, the resistance of the element changes, creating an output voltage proportional to the temperature.

In addition to the three-pin package, there is also a five-pin version of the LM35CH that provides an improved immunity to electrical noise and over-voltage transients. Both versions of the LM35CH provide excellent accuracy (± 0.5°C) over a wide temperature range (from -55°C to +150°C). Their long-term stability and low offset ensure they can be used for years with no significant degradation in accuracy.

The typical application of an LM35CH is to measure temperatures in many environments, including in air conditioning units, industrial processes, and medical equipment. For example, a temperature-controlled process may require the use of an LM35CH to read the temperature of a controlled system. In this instance, the output of the sensor can be connected directly to an analogue-to-digital converter, or a microcontroller, allowing for precise control of the system.

In summary, the LM35CH is a very popular temperature sensor device with excellent accuracy and stability over a wide temperature range. It is used in a variety of applications for accurate and reliable temperature sensing, and is suitable for use with both analogue and digital systems.

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