AD5254 - different VDD and I2C bus voltage

Document created by analog-archivist Employee on Feb 23, 2016
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Is it possible to have VDD for the AD5254 set to +5V but run the I2C bus to the
AD5254 at 3.3V ?


In the specifications section we specify that for VDD = 5V, the minimum logic
high voltage required is 2.4V:
In other words, 3.3V logic should work.

We also have digiPOTs with dedicated VLOGIC pins where you can define the logic
voltages, it works independently of the power supplies.