36.1.1 Unity Gain Mode

The OPA module can be configured to operate in Unity Gain. Unity Gain mode can be enabled in software by setting the Unity Gain Select (UG) bit. Once Unity Gain mode has been enabled, the output of the OPA will be connected internally to the inverting input and the OPA will operate with unity gain feedback.

Tip: Operating the OPA module in Unity Gain mode relinquishes the need for an external inverting input pin (OPAxIN-), since it connects internally to the OPA output, which allows that pin to be used for general purpose I/O.