Hi,
I am using the ADA4522 built in model inside of LTspice. I thank you for offering everyone LTspice it is a wonderful tool and up to this point I have never really noticed too many issues with built in model. However this one I find hard not to bring it to your attention.
If the ADA4522 is simply connected into a test net with both its V+ & V- pins tied to GND and its input and output pins held at GND via some resistance, the model sources ~12mA out of its V- pin. This makes it terribly difficult for the simulator to actually find a DC operating point if the circuits using this model are in any way realistic and the power lines are not totally stiff voltage sources. In order to overcome this issue, I have been forced to use behavioural sources to clamp the V+ & V- pins before power supplies are activated, otherwise the simulation drives the pins way off from reality.
This must be a aberration caused by a modelling error, as the current is coming from the V- pin, but is not complemented on any other pins of the device.
I have attached an example of a very simply circuit, showing this behaviour, which is using the default spice setup parameters.
All the best
Aidan
Edit Notes
Just signing off.[edited by: AidyWal at 9:10 AM (GMT -5) on 15 Jan 2026]
