ADuC7026 Evaluation Board Reference Guide
(5) Potentiometer Demonstration Circuit
Rev. 1.0
Analog Devices Inc., MicroConverter
Page 10 of 15
www.analog.com/microconverter
(5)
P
OTENTIOMETER
D
EMONSTRATION
C
IRCUIT
ADC
DAC
AV
DD
Application
Code
AV
DD
Figure 2: Circuit diagram of the RTD Circuit
Using the sample code in pot.c in the code example folder, the variation in the potentiometer resistance
can be seen on the output LED.
Note that the internal and external reference are 2.5V, which gives an ADC input range of 0V to 2.5V in
single-ended mode. The potentiometer can give a voltage between 0V and AV
DD
= 3.3V.
