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INL\DNL Typical or standard values that can be acceptable for different apps

muhammed shami
Prodigy 10 points

hello everyone
I'm asking about INL\DNL Typical or standard values that can be acceptable for different apps
for example
if i start to built error detection of ADC for radar apps or health apps
there is a threshold value of INL\DNL can be considered accepted to decide if this error at critical value or it normal can't effect that much on a specific apps

with my regards

  • 0
    TI__Guru**** 180911 points

    Hi there Muhammed,

    Welcome to our e2e forum!  I wouldn't say necessarily that there is any specific or typical INL/DNL value needs for a particular application.  You might pay more attention to INL/DNL if you have high DC accuracy needs.  DNL is the deviation in the width of an ideal 'step' while INL is the deviation from the ideal transfer function.  Here is a link to some training material that you might find useful: ADC DC specifications: INL, DNL

  • 0 in reply to Tom Hendrick
    Prodigy 10 points

    1st \many thanks for your response

    2nd\ For ADC ERROR detection purpose it's required to deside if there is any error or not if YES that ammount of error having (high, mid, low effect on system performance)  

  • 0 in reply to muhammed shami
    TI__Guru**** 180911 points

    Hi Muhammed,

    If your DNL is greater than or equal to 1 LSB, you will experience a 'missing code' (or codes).  If you are dealing with an 8-bit converter, that would represent a significantly larger error at the system level than it would if you were using a 16-bit converter.  Higher DNL values can also limit the signal-to-noise and spurious free dynamic range performance of an ADC.  Since INL is related to DNL, finding a device with DNL near '0' (i.e. an ideal ADC) would have the lowest impact on system performance.