Correct Answer  Option 3 : 2046 μs
Concept:
Digital ramp ADC conversion time is given as:
\(= \left( {{2^N}  1} \right){T_{clk}} \)
Given:
n = 10
f = 500 kHz
Analysis:
\({T_{clk}} = \frac{1}{{500\; \times \;{{10}^3}}}\)
= 2 μs
Conversion time = (2^{N} – 1) T_{clk}
= (1024  1) × 2 μs = 2046 μs
The conversion time of different types of nbit ADC is shown :
Type of ADC

No. of Clocks

Time

Counter Type

2n1

2n1 Tclk

SAR (Successive Approximation Register)

n

n Tclk

Flash (Parallel comparator)

1

Tclk

Dual Slope

2n+1

2n+1 Tclk
