Understanding ADC Resolution: A Key Factor in Signal Accuracy

Resolution is the smallest detectable change in an input signal that can be reflected in the output signal. This crucial factor is significantly influenced by the quality of the Analog to Digital Converter (ADC) used.

The resolution of an ADC is determined by the Least Significant Bit (LSB), calculated using the following formula:

LSB = (Vrefh - Vrefl) / 2^N

Where:

• Vrefh: The high reference voltage of the ADC
• Vrefl: The low reference voltage of the ADC
• N: The number of bits in the ADC

A higher resolution ADC, characterized by a smaller LSB value, allows for the detection of finer input signal variations, leading to more precise and accurate measurements.