34.3.2.3.2 Buffered Output
Enable the buffered analog output of the DAC by writing a ‘
1’ to the Output
            Buffer Enable (OUTEN) bit in the Control A (DACn.CTRLA) register. Refer to the
                Electrical Characteristics section for information about the drive
            capabilities of the DAC output buffer.Note: To reduce power
                consumption, the DAC output pin should have its input disabled from the PORT
                peripheral.  Refer to the I/O Multiplexing and Considerations section to
                determine which pin is used by the DAC output.
