–6–
AN-744
–7–
AN-744
POTENTIOMETER DEMONSTRATION CIRCUIT
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Figure 3. Circuit Diagram of the RTD Circuit
Using the sample code in \adc\pot.c, the variation in
the potentiometer resistance can be seen on the output
LED.
Note that the internal and external references are 2.5 V,
which gives an ADC input range of 0 V to 2.5 V in single-
ended mode. The potentiometer can give a voltage
between 0 V and AV
DD
= 3.3 V.
REV. 0
REV. 0
