Hi all,
       I just have a small query regarding DNL and INL. I have a SAR ADC completely designed in verilogA. The DAC array in SAR ADC is implemented with ideal capacitors. When I tried calculating my DNL and INL through matlab scripts, it gives a DNL of '-1' and an INL of '0'.

       But when I try calculating DNL in spectre, it gives a non-zero DNL plot. I am not sure where I am going wrong. Can anyone here help me in this.


Eternity

Thanks for the reply and apologies in having been too abstract in my query.
yes, the dnl of all codes is -1 and inl of all codes is 0.
I attach a zoomed in screenshot of my transfer curve plot here that I use to compute DNL.
I sample 50 times for each code from zero to full scale level for this computation.

Thanks

Eternity