ada4638

Question

I simulated the ada4638-1 in multisim and just a simple unit gain buffer connection. But the simulation result shows the offset voltage is as high as 126 uV when supply voltage is +-10V, which is quite different to the data sheet. 
 Can anyone help me to solve it? thanks a lot! 
 The schematic and simulation result is as following:

FormerMember · Accepted Answer

Try simulating with +/-15V. The Vos is set at certain supply voltages and then you 
 have the PSRR spec which will change the Vos when you change Vsy. 
 Harry)

FormerMember · Answer

No. The model was written for +-15V, and no provisions were made for other supply voltages. 
 So do all your sims with +/-15V on the op amp, and +/-10V on the rest of your system. 
 I'll email the product line apps engineer. 
 Harry

EZAdministrator · Answer

This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

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ada4638