There is a variety of temperature sensors on the market all of which meet specific application needs. The most common sensors used to solve these application prob- lems include the thermocouple, Resistive Temperature Detector (RTD), Thermistor, and silicon based sensors. For an overview and comparison of these sensors, refer to Microchip’s AN679, “Temperature Sensing Technologies” . This application note focuses on circuit solutions that use thermocouples in the design. The signal condition- ing path for the thermocouple system will be discussed in this application note followed by complete application circuits.M AN684 Single Supply Temperature Sensing with Thermocouples bead. This bead is exposed to the thermal environment Author: Bonnie C. Baker of interest. If there is a temperature difference between Microchip Technology Inc. the bead and the other end of the thermocouple wires, a voltage will appear between the two wires at the end INTRODUCTION where the wires are not soldere……