Differential input signals are useful since they offer better noise cancellation. Using a differential input also doubles the ADC’s dynamic range. One of the new key features of the ADC12_B is the ability to combine two ADC input channels to create a differential input channel. This is done by setting the ADC12DIF bit in the ADC12 control register. In this mode, the difference between the two input channels is measured and stored in the ADC12MEMx register. When compared to single-ended usage, the ADC conversion formula and the impact of data format differs in differential mode. Users may refer to the ADC12_B Users Guide for notes on how to evaluate the ADC’s conversion results in this mode.

