This example shows how higher fidelity or more detailed component models can be built from the Foundation library blocks. The Op-Amp block in the Foundation library models the ideal case whereby the gain is infinite, input impedance infinite, and output impedance zero. The input and output impedances and finite gain are included in this example model.
Double-clicking on the Finite Gain Op-Amp Block shows the op-amp construction from the Voltage-Controlled Voltage Source block, plus two resistors to implement the input and output impedances. A typical open-loop gain for an op-amp is 1e5, as used here.