For the design a 10 bit sar adc , what should be the maximum offset of the comparator
Hi Guys,
Iam going to design a 10 bit cmos adc, using SAR architecture, with capacitif dac, my question is : what should be the maximum offset of the comparator, less than half lsb ?
Re: how to find the sizing of the capacitance for a 10 bit sar adc
Assume the offset is linear/insignificant (with offset-cancellation), the linearity is limited by the matching of the DAC capacitors and the DAC type (binary-/themometer-code). Binary type has fewer switches but larger DNL; both types have the same INL.