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Design >> Mixed-Signal Design >> Gain errror of ADC
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Message started by babunp114525 on Apr 19^th, 2007, 7:35am

Title: Gain errror of ADC
Post by babunp114525 on Apr 19^th, 2007, 7:35am

The gain error of any ADC is measured at the last code transition point i.e. at the full scale range. Is it beacuse, we are measuring the worst case scenario as the input is FS? or what is the reason behind this?

Thanks,

Babun

Title: Re: Gain errror of ADC
Post by NitinAtCadence on Apr 26^th, 2007, 7:46pm

Hi Babun,
Its because for the gain error measurement, you assume that error is 0 for the first code. Its like taking 2 intersecting pencils, assuming one is ideal and measuring the deviation at the far end considering the intersecting point as origin.

Hope that helps.
NitinAtCadence

Title: Re: Gain errror of ADC
Post by loose-electron on May 23^rd, 2007, 5:47pm

It is actually the slope of the transfer relationship (Ignoring INL, DNL for the moment) - Google it, theres stuff out there on the parameters.