Matched pairs are generally just two identical dies that share a common subtrate for tempco stabilizing. Normally they will be used in circuits such as current mirror emitter followers where balance is an all important perameter.
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Simply using two normal 5401 models on the schematic is not obviosuly an exact match for a matched pair model, but should in fact be at least as good or better in expected results since the tempco match will be exact which although very close is not the case in the actual part.
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So the answer is "maybe" it would be alright just to use the existing symbol twice to simulate a perfectly matched pair. Or, as an alternative you could set up some of the parameters of the model as globals and use Monte Carlo commands?to statistically "distribute" the tempco based variables. In order to do that effectively you will need to know the extent of effects on those varoiables, either from manufacturer supplied data points or from data sheets for the component. In any event, possibly?not an easy task in general and not what you may have hoped for if the simpler approach is too optimistic, but there you are.
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- Cordially - RC
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