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AD628 Vin limitation/timing vs Power supplies?

Question asked by FreddyS on Jul 14, 2015
Latest reply on Jul 16, 2015 by ScottH

 

Dear supporter

 

I am using the AD628ARMZ in my design.

 

From time to time it happens that the device fails to operate according its specifications and becomes defective:

 

  • Output voltage got a 1V drift at its output (in one card)
  • Output voltage failed to zero (in another card).

  

Replacing the parts solved the problem.

 

Pls see the schematics below. Can you see a reason for this behavior?

 

Please note that the Vin to the device is provided before the +Vs -Vs of the card/device itself. Can it be a problem?

 

 

Thanks

 

Freddy

   

 

 

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