An ADC has a resolution of 10 bits and an input voltage range of 0V to 2.5V. What is the smallest voltage change that can be resolved by this ADC (i.e., the value of the LSB)?
V is the full-scale input voltage range = 2.5V
$n is the resolution in bits = 10
Find the total number of digital codes (quantization levels):
2^10 = 1024
Calculate the voltage step size:
LSB Voltage = 2.5/1024 ~ 0.0024414 V
The smallest voltage change that can be resolved by this ADC is approximately 2.44 mV.
