Input bias problem in OrCAD

[khaled_sayed]

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]

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.