Question

An 8-bit successive approximation DVM of 5 V range is used to measure 1.2 V. The contents of the SAR after 5 clock is
1. 01010000
2. 00111100
3. 00111000
4. 00110111

Answer 1

Correct Answer - Option 2 : 00111100

An 8-bit successive approximation type DVM of 5 V range.

i.e. 5 V is the upper limit.

5 represents 11111111 = 255

To measure 1.2 V on 5 V range is,

1.2 V represent after 5 clock pulses \(= \frac{{255}}{5} \times 1.2 = 61.5 \approx 60\)

The content of SAR after 5 clock pulses

= 60 = 00111100