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Potentiometer Demonstration Circuit - Analog Devices ADuC7026 Application Notes

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AN-744

POTENTIOMETER DEMONSTRATION CIRCUIT

AV DD

By using the sample code in pot.c located in the code example

folder on the accompanying CD, the variation in the

AV DD

potentiometer resistance can be seen on the output LED.

ADC

DAC

Note that the internal and external reference 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

= 3.3 V.

APPLICATION

CODE

Figure 3. Circuit Diagram of the RTD Circuit

Rev. A | Page 10 of 16

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