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A 12bit ADC is operating with a 1μsec clock period and the total conversion time is seen to be 12μsec. The ADC must be of the
- a)Flash type
- b)Counting type
- c)Integrating type
- d)Successive approximation
Correct answer is option 'D'. Can you explain this answer?
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A 12bit ADC is operating with a 1μsec clock period and the total ...
n x clock period = conversion time for successive approximation type ADC, where ‘n’ is the no of bits.
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A 12bit ADC is operating with a 1μsec clock period and the total ...
Successive Approximation ADC Explanation:
Operation:
- A 12-bit ADC with a 1-second clock period and a total conversion time of 12 seconds indicates that the ADC is of the successive approximation type.
- Successive Approximation ADCs use a binary search algorithm to determine the digital output corresponding to the analog input.
Working Principle:
- The ADC starts by comparing the input analog voltage to the midpoint of the ADC's input range.
- Based on this comparison, the most significant bit (MSB) of the digital output is set.
- The ADC then successively compares the input voltage to the midpoints of the remaining voltage ranges, setting the subsequent bits until all 12 bits are determined.
Conversion Time Calculation:
- In a successive approximation ADC, the conversion time is determined by the number of bits in the ADC and the clock period.
- The conversion time for a 12-bit ADC with a 1-second clock period can be calculated as 12 clock cycles (1 second each) for all 12 bits, resulting in a total conversion time of 12 seconds.
Conclusion:
- Based on the given information of a 12-bit ADC operating with a 1-second clock period and a total conversion time of 12 seconds, it is clear that the ADC is of the successive approximation type.
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A 12bit ADC is operating with a 1μsec clock period and the total conversion time is seen to be 12μsec. The ADC must be of thea) Flash typeb) Counting typec) Integrating typed) Successive approximationCorrect answer is option 'D'. Can you explain this answer?
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