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Is the potentiometer adjusting both VDD and Vo, as it shows in the data sheet? or should it just control Vo? thanks
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The pot goes between Vdd and Vss, with the wiper to Vo. Its just a bad diagram in the data sheet. Look in the DS for CFAG12232D-NYG.

CF Tech

Connect the end terminals of the pot to Vdd (+5v) and Ground (0v). Connect the wiper (center terminal) to Vo.