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TB3016

Title:
Using the PIC MCU CTMU for Temperature Measurement
Name:
TB3016
Date:
02/19/2009
Author:
Padmaraja Yedamale
Description:
The Charge Time Measurement Unit (CTMU), introduced on the latest generation of PIC24F and PIC18F devices, uses a constant current source to calculate both capacitance changes and the time difference between events. The same current source can also be used to measure temperature by exploiting a basic principle of semiconductor physics. This allows the use of a common and inexpensive diode, in the place of a relatively more expensive thermistor or other temperature sensor. This brief describes the basic concepts of temperature measurement using the CTMU.
Keywords:
Temperature Measurement, CTMU, PIC24F, PIC18F
 
Application Notes & Source Code
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  TB3016
  02/19/2009
  116KB
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