33.3 DAC Voltage Reference Output

The DAC voltage can be output to the DAC1OUT pin by setting the DAC1OE bit of the DAC1CON0 register. Selecting the DAC reference voltage for output on the DAC1OUT pin automatically overrides the digital output buffer and digital input threshold detector functions, it disables the weak pull-up and the constant-current drive function of that pin. Reading the DAC1OUT pin when it has been configured for DAC reference voltage output will always return a ‘0’.

Due to the limited current drive capability, a buffer must be used on the DAC voltage reference output for external connections to the DAC1OUT pin. Figure 33-2 below shows an example buffering technique.