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(AD8418A)Vout ≠ Vref

Hi !

I have a question about AD8418A.

This is my test circuit.

I measured the Output voltage but it is not Vref level.

=> I don't have AD8418A so I measured AD8418.

Why this happens?

Our customer said that  this won't happen when they are using AD8206

but I measured AD8206 at my Lab and same thing happened.

But the output voltage offset is smaller than AD8418.

I think that maybe the +IN pin leakage current is big 

Can you explain that why this happens?

Best regards

Kawa

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  • Hi Kris

    Thank you for your support everyday.

    I talked about this with ADKK and we think the shunt resistor is too big as you said.

    So I told the same thing to my customer and maybe I can close this issue.

    If I get any additional question for this maybe I will ask here but 

    anyway I will let you know that can I close this session or not.

    I will report you very soon!

    Best regards.

    Kawa

Reply
  • Hi Kris

    Thank you for your support everyday.

    I talked about this with ADKK and we think the shunt resistor is too big as you said.

    So I told the same thing to my customer and maybe I can close this issue.

    If I get any additional question for this maybe I will ask here but 

    anyway I will let you know that can I close this session or not.

    I will report you very soon!

    Best regards.

    Kawa

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