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(ADuM3190)Refout

Question asked by donadona999s on Jan 5, 2016
Latest reply on Jan 6, 2016 by donadona999s

Hi !

 

I have a question about ADuM3190.

One of our customers are trying to use ADuM3190 as iso-AMP.

They said when they change the input voltage , the refout-voltage will change too.

  =>In our customers case , REFout will change 1.220 to 1.245 when the input voltage changes 0 to 2V.

I think this is impossible because +IN-pin is Hi-Z input pin and also REFout has enough drive power.

Anyway , +IN and -IN is not connected so REFout-voltage won't change.

Is this correct?

 

I tested the customers circuit with our Eval-Board but REFout won't change.

=>Please see my attached file.

 

Is there any possibility , can you give me some advice about this?

 

Best regards.

Kawa

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