35.3.2.5 Input Voltage Range and Bias Current

In applications where a rail-to-rail input voltage range is not needed, the OPAMP peripheral may be configured to save power. Writing ‘1’ to the Input Range Select (IRSEL) bit in the Power Control (PWRCTRL) register reduces the voltage range of the op amp inputs, which also reduces power consumption. See the Electrical Characteristics section for more information about the expected voltage range and power consumption.

The bias current of the op amp inputs is the same as the leakage current specified for I/O PORTS in the Electrical Characteristics section.