I am using Pspice to simulate a simple unity gain circuit based on OP-400 A. Schematic below.
When I use any of the OP-400 A/E/F/G/H I see that there is a spike at the +V and -V pins whereas when I use OP-400 model I do not see it . Wondering if there is something wrong I am doing when using OP-400A or is there a newer model?
Some spice models do no model current draw correctly. If this is not one of your critical parameters, I would ignore.
Also, the OP400 is a very ooooooold part; I would look at ADA4622-4.
Depending on critical your signal path is, I would also use two duals instead of a quad. More choices, better performance.