ADC Nonlinearity INL and DNL

Characterise an ADC from a histogram of codes captured under a full-scale ramp, computing differential and integral nonlinearity in LSBs.

Constraints

• Input is a code histogram.
• DNL of a code is its bin width divided by the ideal width, minus 1.
• INL is the running sum of DNL.
• Discard the first and last codes, which saturate.
• Report the peak absolute DNL and INL.
• A perfectly linear ADC gives zero for both.