Lowest impedance for ADC?

[Demon]

I still had my excel spreadsheet. A quick adjustment and I came up with this:



(did some corrections)


Instead of dropping the resolution to 256 by dropping 2 low bits, I still get a range of 1014 ADC values and the flight sim gets 0-1023 values. Only downside, I'll probably get a tiny dead-zone at top and bottom of pot turn.


Now the challenge is to see if I can convert Henrik's formula.