Application Note 48 AN 48 - 1 November 1991

For the analog circuit designer, there can be no better fate for simulations, viewing this situation in terms of which model to use. Designers no longer need worry about whether the third party supplier’s model can really cut it. Speaking in terms of the ultimate potential, no one can know an actual part better than the people who designed and produced it, that is the original source IC vendor. The only possible caveat to this scenario is that the vendor supplying an op amp model needs to fully understand not only the real part, but they must also understand SPICE and modeling issues. Without both types of understanding firmly in place, the user can end up with a real part that works well and a model which doesn’t. For such a case, simulation will be of little value; simulation runs to verify circuit performance won’t match the actual part’s bench performance.