Correct Answer - Option 3 : 10 bits
Explanation:
Resolution (R):
Resolution of Digital to Analog Converter(DAC) is a change in analog voltage corresponding to 1 LSB bit increment at the input.
\(R = \frac{V_r}{2^n-1}\)
Where
Vr = Reference voltage
n = number of bits
Resolution should be below 0.1% of the maximum value
\(\frac{V_r}{2^n-1}≤\frac{0.1\ \times \ V_r}{100}\)
(2n - 1) ≥ 1000
2n ≥ 1001
n = 10 satisfies the above equation.
Hence n = 10.
