Consider the following statements regarding ADC interfacing to 8051:1.ADC converts analog signal to digital.2.Start of conversion signal is required.3.End of conversion signal indicates completion.Which of the above statements is/are correct?
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An n-bit ADC divides its input range into roughly 2^n quantization levels. Quantization error is inherent in finite resolution, while sampling frequency determines whether the signal can be reconstructed without aliasing. Key relation: LSB≈V_FS/2^n; ideal quantization error ≈±0.5 LSB.
Exam focus: More bits improve amplitude resolution; higher sample rate improves time/frequency representation. Common trap: Resolution is not simply 1/n and sampling rate is not irrelevant.
Formula / Key Relation
LSB≈VFS/2^n; ideal quantization error ≈±0.5 LSB.
Detailed Explanation
Correct Answer: B - 1, 2 and 3 Quick Concept Explanation An n-bit ADC divides its input range into roughly 2^n quantization levels. Quantization error is inherent in finite resolution, while sampling frequency determines whether the signal can be reconstructed without aliasing. Key relation: LSB≈V_FS/2^n; ideal quantization error ≈±0.5 LSB.Exam focus: More bits improve amplitude resolution; higher sample rate improves time/frequency representation. Common trap: Resolution is not simply 1/n and sampling rate is not irrelevant. Statement-wise Verification Statement 1 - Correct.ADC converts analog signal to digital.An n-bit ADC divides its input range into roughly 2^n quantization levels. Statement 2 -…
Correct Answer: B - 1, 2 and 3
Quick Concept Explanation
An n-bit ADC divides its input range into roughly 2^n quantization levels. Quantization error is inherent in finite resolution, while sampling frequency determines whether the signal can be reconstructed without aliasing. Key relation: LSB≈V_FS/2^n; ideal quantization error ≈±0.5 LSB.
Exam focus: More bits improve amplitude resolution; higher sample rate improves time/frequency representation. Common trap: Resolution is not simply 1/n and sampling rate is not irrelevant.
Statement-wise Verification
Statement 1 - Correct. ADC converts analog signal to digital. An n-bit ADC divides its input range into roughly 2^n quantization levels.
Statement 2 - Correct. Start of conversion signal is required. Sampling frequency determines whether the signal can be reconstructed without aliasing.
Statement 3 - Correct. End of conversion signal indicates completion. Sampling frequency determines whether the signal can be reconstructed without aliasing.
Core Concept
An n-bit ADC divides its input range into roughly 2^n quantization levels. The LSB step/resolution is approximately full-scale range divided by 2^n. Quantization error is inherent in finite resolution, while sampling frequency determines whether the signal can be reconstructed without aliasing.
Formula / Key Relationship
LSB≈V_FS/2^n; ideal quantization error ≈±0.5 LSB.
Why the Other Options Are Wrong
Option A is incorrect because it omits correct statement(s) 3. Option C is incorrect because it omits correct statement(s) 2, 3. Option D is incorrect because it omits correct statement(s) 2.
Resolution is not simply 1/n and sampling rate is not irrelevant.
Quick Revision
Start and End of Conversion Signals is linked with ADC Interfacing, 8051 Interfacing and Microprocessors and Microcontrollers. More bits improve amplitude resolution; higher sample rate improves time/frequency representation.
Option A is incorrect because it omits correct statement(s) 3. Option C is incorrect because it omits correct statement(s) 2, 3. Option D is incorrect because it omits correct statement(s) 2.
Common Mistake
Resolution is not simply 1/n and sampling rate is not irrelevant.