资料介绍
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
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