Our products are sensitive to op amp noise performance. I'm having some problems researching the noise performance of the OP4177.
I see a current noise density of 0.2pA/√Hz in the OP4177 DataSheet.
But when I used the spice model of OP4177 to simulate on LTspice, I found that the simulation result was 0.857pA/√Hz.
I tried to simulate other op amps with this testbench, and the results are all correct, so the testbench should be correct. Then I suspect that the DataSheet data is wrong, or the spice model of OP4177 is wrong, please check it.
Looking forward to your reply, thanks!
All the best,