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Posts: 15
Registered: ‎09-09-2009
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3 phase MAin measurement ( 220VAC) with Si8900

Hi , I am developing circuit for 3 phase AC 220V measurement . No current measurement needed . Only voltages ( against common neutral ) . I was considering to use Si890X since it has 3 AINP.  Can I use only one chip for all 3 phases , or do I have to use separate one for each phase ? Also I plan to use similar front op-amp circuit as used in evaluation boards,
Thanks 

Posts: 13
Registered: ‎02-25-2014

Re: 3 phase MAin measurement ( 220VAC) with Si8900

You should be able to use a single chip, as long as you have adequate attenuation followed by input amplifiers.