47.6.8.1 Buffer/PGA for ADC

Each OPAMP can be configured as a buffer or a PGA for other modules such as, ADC or AC. OPAMPs can also be cascaded to increase the programmable gain.

The output to the OPAMP must be enabled by writing a '1' to the Analog Output bit in the Operational Amplifier x Control register (OPAMPCTRLx.ANAOUT). The ADC input mux must be configured to select OPAMP as input. Refer to the ADC – Analog-to-Digital Converter for additional information on configuring the ADC.