A 12– bit ADC is operating with a 1μsec clock period

A 12– bit ADC is operating with a 1μsec clock period and total conversion time is seen to be 14 μsecs. The ADC must to be of the

1. flash type
2. counting type
3. integrating type
4. successive approximation type

For N -bi t, successi ve A/D converter, the number of clock pulses required is N-clock pulse.