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OPA548 simulation

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hi all,
I'm trying to simulate a simple non-inverting amplifier in OrCAD capture 16.0. Every time that I try to run a simulation on the circuit though, all nodes connected to the OPA548 come up as floating because pspice doesn't contain a model for the OPA548. How do I make pspice add the model, so that it will properly include it as a subcircuit?
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