nijMcnij
Full Member level 1
ADC question
hello all,
i am designing a 10bit SAR (charge redistribution) ADC.
the range of the signal to be converted is from 1,65V to 3,3V.
in this ADC, i am using 3,3V as the reference voltage for the comparator and i switch the capacitors (during bit cycling) between gnd and 3.3V.
in doing so , i am dividing the voltage range between 0 and 3,3V to 2^10 levels.
so i am loosing 2^5 levels since my input signal range is between 1,65 to 3,3V.
how can i design the ADC inorder to make it use the full 10 bit resolution for the voltage range 1,65 to 3,3V
many thanks
hello all,
i am designing a 10bit SAR (charge redistribution) ADC.
the range of the signal to be converted is from 1,65V to 3,3V.
in this ADC, i am using 3,3V as the reference voltage for the comparator and i switch the capacitors (during bit cycling) between gnd and 3.3V.
in doing so , i am dividing the voltage range between 0 and 3,3V to 2^10 levels.
so i am loosing 2^5 levels since my input signal range is between 1,65 to 3,3V.
how can i design the ADC inorder to make it use the full 10 bit resolution for the voltage range 1,65 to 3,3V
many thanks