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Model change of the LT1497 between LTSpice version 24.0.12 and 24.1.0 and following

Category: Software
Product Number: LT1497
Software Version: 24.1.12, 24.1.0, 24.1.3

Hallo,

I am currently working with high'isch frequency circuit using the LT1497 amplifier. The circuit was developed using the newest version of LTSpice and during implementation proved to simulate the circuit wrong. When using an older version like 24.0.12 the simulation is far more accurate (almost right). I noticed in the asy file of the LT1497 the model was changed from the subckt in the LTC.lib to a new LT1497.sub
As i cant find a way to gain insight into the new model I assume its propriatry but if not, could someone share insight into the new model and why this one behaves so differntly from before? In my case even worse compared to before?

For further context, its "simple" integrator circuit that is charged by the OPAmp and then rapidly discharged from a switch, on repeat. Leading to jumps in input foltage for the OPAmp as the input is partially dependant on the output of the integrator.

Best regards!

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