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.