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    Measure inl of an ADC in cadence

    Dear all,
    Could anyone please help me measure INL of an ADC in cadence? Currently i am giving a ramp input to the ADC, and trying to get the histogram measurement of the ADC output. Using the, I am trying to calculate the DNL and hence INL. I feel that this method is not accurate. I tried using the INL function in cadence. But that didnt work either. Could someone please help me with this.
    Thanks.

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    Re: Measure inl of an ADC in cadence

    Hi,

    This topic is not new, thus do an internet search "INL measurement ADC" to find documents.

    I see documents from adc manufacturers, but I assume cadence gives related informations, too.

    Klaus
    Please don´t contact me via PM, because there is no time to respond to them. No friend requests. Thank you.



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  3. #3
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    Re: Measure inl of an ADC in cadence

    I strongly suggest you to import your data in MATLAB and you can do that easily.
    If you want I can provide the code.



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  4. #4
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    Re: Measure inl of an ADC in cadence

    Sir,
    I tried this too. The following is the code that i am using to calculate DNL and i am trying to sum the DNLs up to get INL.

    Code:
     nbins = 1024;
    dnl= hist(y,nbins)/n-1;
    I am trying to get the INL of the ADC with 10 bits accuracy. Hence nbins = 1024. Y is the data imported from cadence. But i am unable to find the value of n where n is the number of samples in the bin for an ideal case.
    Do you suggest any other method?



  5. #5
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    Re: Measure inl of an ADC in cadence

    I wrote a manual code in MATLAB for it



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