AnsweredAssumed Answered

AD421 current output error

Question asked by Edriano on May 25, 2012
Latest reply on Jun 18, 2012 by Edriano

Hello,

I am using the AD421 and what i am getting here ia an offset bigger then 0.2% stated at datasheet.

at 4mA i get 3.98mA

and at 20mA i get 19.98mA

 

I am using an external transistor mode and a small fet mmbfj113, i was wondering why do i get this error.

is that possible the FET i am using?

 

R2 is not assembled.

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