In a recent blog post on omzlo.com, [Alain] explains how they found a bug in the Arduino SAMD21 analogRead() code which causes the output to be offset by between 25 mV and 57 mV. For a 12-bit ADC ...

If your motor control application ... to the ADC itself. The weakest link in the chain dictates the real-world resolution and accuracy. Monitoring temperatures at various locations is essential for ...

In all cases the ADC is 12bit and converts at 1Msample/s ... with final production in Q4.” XMOS collaborates with motor control and robotics specialist Synapticon.