The AM261x LaunchPad maps 20 ADC inputs to the BoosterPack header. All of the ADC inputs that are used in the LaunchPad are ESD protected.

Figure 2-24 ADC/DAC Signal Pathing

Multiple muxes are involved from AM261x Soc to BoosterPack connectors. Detailed table is given in Boosterpack section.

The ADC and DAC require a voltage reference. The AM261x LaunchPad has two switches that allow the user to switch between the DAC and ADC VREF source.

Figure 2-25 ADC and DAC VREF Switches

The DAC VREF Switch (S1) is a single pole double throw switch that controls the input of the ADC VREF inputs of the AM261x SoC.

The ADC VREF Switch (S2) contains two single pole double throw switches that controls the input of the ADC VREF inputs of the AM261x SoC.