Does the AD8429 model in LTSpice model the input bias current behavior of AD8429? It seems not to me, but I would like confirmation. I am trying to use AD8429 with 10Mohm bias resistors to GND on each input, which is required, because I am sensing a ~1.8nF capacitive sensor, and I require bandwidth all the way down to ~10Hz. However, due to the relatively high input bias currents of AD8429, I am fighting with the input voltage generated by bias current + 10Mohm resistors causing the output to be railed (DC offset gets gained up).
I am now playing around with DC servo from output of AD8429 and feed back into the -IN pin, but LTSpice seems not to model the input bias currents correctly, so I'm having to add those as emulated current sources from +IN and -IN nodes.
