Analog Temperature Sensor

Last modified by Microchip on 2023/11/10 11:11

What is an Analog Temperature Sensor?

An analog (or voltage output) temperature sensor provides a voltage level that is directly proportional to the measured temperature. In simple words, these devices convert temperature to voltage.

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Why Should I Use an Analog Temperature Sensor?

In many applications, monitoring temperature can improve system performance, reliability, and product quality. It can be used to replace thermistor solutions with the following benefits:

  • Silicon temperature sensors are linear over a wider temperature range, while the temperature coefficient of a thermistor is non-linear.
  • Silicon temperature sensors do not require an excitation current, which lowers power consumption.
  • Silicon temperature sensors do not require external circuitry, hence minimizing cost and board area.

The figure below shows an application example using a thermistor:

thermistor diagram

The figure below shows a temperature sensing application using an MCP9700/1, one of Microchip's analog temperature (thermal) sensors. Notice that the number of devices required for the application compared to the thermistor application is significantly reduced.

mcp9700 application diagram

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Temperature Sensor Application Examples

Application examples that deal with temperature include:

  • Power supply thermal shutdown
  • Thermostat control
  • Fan control
  • Automotive battery conditioner
  • HVAC
  • Refrigerator
  • Freezer
  • Rice cookers
  • Power amplifier
  • Food warmers
  • Base stations
  • STE top boxes
  • PC/Server and more

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Microchip's temperature (thermal) sensing products:


Specification highlights:

  • ±2 °C from -10 °C to +70 °C
  • Offered in SC70 and TO92 packaging


Specification highlights:

  • ±2 °C from -40 °C to +125 °C
  • Offered in pin compatible replacement to TC1046/7/7A

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Learn More

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