estradasphere
Member level 4
hi,
is there a rough formula to calculate the accuracy of digitally controlled potentiometers? i want to estimate the accuracy of a DCP which compensates the dc-offset at the input of an op-amp. since the offset voltage in my circuit frequently changes, the dc-offset is cancelled by the DCP. does a DCP have a lower accuracy for low offset voltages? if yes, a certain dc-offset at the input of the op-amp still remains. all i want is to estimate the the error of the DCP for different input dc-offset voltages to calculate the remaining dc-offset.
thanks
is there a rough formula to calculate the accuracy of digitally controlled potentiometers? i want to estimate the accuracy of a DCP which compensates the dc-offset at the input of an op-amp. since the offset voltage in my circuit frequently changes, the dc-offset is cancelled by the DCP. does a DCP have a lower accuracy for low offset voltages? if yes, a certain dc-offset at the input of the op-amp still remains. all i want is to estimate the the error of the DCP for different input dc-offset voltages to calculate the remaining dc-offset.
thanks