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ADM3260: Are power isolation and signal isolation connected?

Question asked by cschmidt on Nov 5, 2015
Latest reply on Nov 6, 2015 by DaveC

Hello community!

 

I'd like to know if there's an internal connection between the power isolation and the signal isolation units.

In the data sheet they are drawn as independent units with external connections, so I would like to assume they aren't.

 

The reason I am asking is that I would like to use 3.3V as the I/O voltage on both sides. However, due to the better power rating, I'd like to use 5V -> 3.3V conversion on the power stage, thus VIN = 5V but VDDP = 3.3V. looking at the data sheet this does not seem to be a problem, but as there are no examples where the two pins are not connected, I'd like to be sure.

 

Thanks in advance for any replies,

Christian

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