harold_2004,
It doesn't appear that there is not a generally available SPICE model for the LM1895N.
In this case, what I would attempt, with some additional effort, is to construct a model from the datasheet - as it does give an equivalent circuit model on the 3rd page describing the internals. It may be difficult to get it perfect without knowing all of the parameters of the BJT / Diode semiconductor components internal to the device, but it would be a start.
If you need help with the steps involved, let me know.
Regards,
Patrick Noonan
Business Development Manager
National Instruments - Electronics Workbench Group
