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Input bias problem in OrCAD

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khaled_sayed

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hi,
I am facing a problem with orcad simulator and i want someone to help me.

I am designing now an amplifier using analog devices AD8033 opamp, in the datasheet of this opamp, the input bias current=1.5--->11 pA, but in the simulation on orcad i find input bias current=750 nA!!

this error is very big

i do not know why this happens,
is it from the Pspice model??

note: I downloaded the model from the Analog devices site.
 

Davood Amerion

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Input bias problem

Input bias current is depend on input pin voltage,
I think if we bring pin voltage out of specified by manufacuturer it will increased significantly.
 

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