Hi,

The answer is quite simple :

360° + 3 decimals = 360 000 steps ... 19 bits !

360° + 2 decimals = 36000 steps ... 16 bits

How do you do that with a 10 or 12 bits ADC ???

try to look at 16 to 20 bits ADCs.


Now, JUST for calculations ...

3 decimals ... need at least PBPL and a Pic 18 ... Why not.


The final smile ... what about your position sensor precision and linearity ???

Alain

2 decimals Ok