i am working with your open SPICE models of AD8033 and AD8065
and i am having troubles with the voltage gain characterization.
I would like to reproduce the OPEN-LOOP response
as appears in your datasheet, using the small-signal
AC mode of LTSPICE and/or ADISIMPE.
1) AD8065 fails with LTSPICE and ADISIMPE giving the same wrong response in both simulators.
2) AD8033 fails with LTSPICE but ADISIMPE gives a reasonable response.
3) TI-OPA129 with LTSPICE gives a response reasonabily similar to the datasheet.
4) OP113 fails with LTSPICE and ADISIMPE giving the same wrong response in both simulators.
but I am able to obtain a reasonable response using a series 100R resistor with the high impedance input.
I send you screen shoots with circuit/model details.
I will be happy to provide any other simultation result or information of your interest.
Thanks in advance,