i have a complain about the Kinetis MCUs, K22FN512.
I did all the art for a good adc result:
1. Voltages are highly stable and noise free
2. ADC inputs are driven by ADC-Driving OpAmps
3. Reference voltage is stable.
4. Solid GND Plane
However, I get noise on my result:
Its 12 binary digits noise at 12 Bit conversion. Thats too much for me, as I want to use the adc in a control loop.
Its approx 0,2%-0,3% noise in the measurement range but this is too much for a good adc, like the datasheet promises.
What can I do better to improve my performance? I want to switch to Kinetis KV44. Will there be better results?
I'm pretty sure you won't do a new revision, but please make more sure next time, you get a good and stable adc result.
Other people also complained with similar results.