Raspberry PI zero W ADC

The Raspberry Pi zero 2 is a wonder

We are designing an add-on to give the Raspberry Pi and the PI zero W 6 channels of 12 BIT ADC.

How to configure the ADC inputs

The big question is: should we put components on the board to enable the user to configure the ADC inputs for ±10V or just leave the straight 3.3V like an Arduino?

Let us know what you think.