I've got some concerns about the performance of the 16-bit Kinetis ADC. To help address those, I've made some major mods to the IAR/Freescale ADC demo to generate histograms of ADC readings. Not good news, at least using the K60 Tower kit board reading the onboard pot. Granted, the board does not have a nice stable Vref and pot voltage, but I'm seeing between 4 and 5 bits of noise in averaged readings. If I interpret the data sheet correctly, this ain't meeting spec... Anyone have a genuine product design that does substantially better than this?
If anyone cares to compare results, I've attached the code and sample histograms in the adc_histo\histograms\ folder.
Original Attachment has been moved to: adc_histo.zip