Correct Answer - Option 3 : 255
Concept:
Flash Type ADC:
1) It is the fastest ADC among all the ADC types.
2) An n-bit flash type ADC requires:
2n -1 comparators, 2n resistors and one 2n × n priority encoder.
3) It is also called parallel type ADC.
Calculation:
The number of comparators required to build an 8-bit flash ADC will be:
N = 28 - 1
N = 256 - 1
N = 255
