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 = (2N – 1) Tclk
= (1024 - 1) × 2 μs = 2046 μs
The conversion time of different types of n-bit ADC is shown :
Type of ADC
|
No. of Clocks
|
Time
|
Counter Type
|
2n-1
|
2n-1 Tclk
|
SAR (Successive Approximation Register)
|
n
|
n Tclk
|
Flash (Parallel comparator)
|
1
|
Tclk
|
Dual Slope
|
2n+1
|
2n+1 Tclk
|