38.5.3.7 Differential and Single Ended Conversions

The ADC can measure up to 12 single ended input channels (AIN[11:0]), or up to 3 differential inputs channels (AIN0/AIN1, AIN2/AIN3, AIN4/AIN5), plus 6 single ended input channels (AIN[11:6]).

Refer to the CHNCFG3 register for bit descriptions on how to configure them for differential mode.