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RTD interfacing and linearisation using an ADuC706x microcontroller

Posted: 14 Jan 2010     Print Version  Bookmark and Share

Keywords:RTD interface  sensor interface  ADuC706x microcontroller 

The platinum resistance temperature detector (RTD) is one of the most accurate sensors available for measuring temperature within the -200°C to +850°C range. The RTD is capable of achieving a calibrated accuracy of ±0.02°C or better. Obtaining the greatest degree of accuracy, however, requires precise signal conditioning, A/D conversion, linearisation and calibration.

The ADI MicroConverter product family includes devices with a 24bit ADC and a 32bit AMR7 MCU in a single chip with signal conditioning circuitry ideally suited to RTD sensors.

This application note describes how to implement a complete RTD sensor interface using the ADuC706x and several passive components.

View the PDF document for more information.

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