Im using a digital potentiometer in a dual supply, Vdd = +2.5V and Vss = -2.5V, What is the maximum digital input levels I can use?
If a digital potentiometer is used in dual supply with voltage rails between +2.5V and -2.5V, then Vih cannot exceed +2.5V.
If a logic of 3.3V is needed two different solutions can be implemented,
1- Use a level translator such as ADG3241 or the ADG3301
2- Use a level shifter
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