Search FAQs on the left to see if your question has been answered. Click on the dropdown to view all of the documents associated with the product. If you can't find your question, click on Ask a Question.

ADuC824: differential input

I have trouble understanding the REFIN(+) and REFIN(-) pins on the ADuC824.
Also, whats their relation to differantial/unipolar input?

Are there any referance board like for the ADuC812, where the schematic is


The reference to the ADuC824 is a true differential input. The differential
input of the reference has no relation to the ADC inputs being unipolar or

The reference supplied to the ADC is simply REF(+) - REF(-). The analog inputs
are always differential. The analog input range in bipolar mode is +/- {REF(+)
- REF(-)} / GAIN. In unipolar mode the input range is 0 to {REF(+) -

You can now download the evaluation board documentation from our website: