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Increasing the resolution of analog temperature sensors

Posted: 20 Apr 2010 ?? ?Print Version ?Bookmark and Share

Keywords:temperature sensor? microcontroller? integral ADC?

At a recent trade show, a demonstration board was required to display ST's new low-cost temperature sensor, the STLM20. The idea was to connect it to a basic microcontroller with on-board analog-to-digital converter (ADC) and display the temperature on seven-segment LEDs. Any user would be able to affect the temperature by applying his finger directly to the sensor and then watch the display change as a result.

The goal was to keep things simple and use the ADC converter on the micro thus avoiding the expense and engineering effort of using an external ADC.

The design flow used for the demonstration board can be applied in many applications. This application note describes how any user can implement a temperature sensor design using the LM20 and a low-cost microcontroller with integral ADC.

View the PDF document for more information.

Click here to view related datasheets.

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