Resolution is the ability of a measuring instrument, such as an analogue-to-digital converter (ADC), to detect the difference between two slightly different readings.

With resolution the absolute amount is irrelevant and only relative differences are considered.

The resolution of a microohmmeter, for example, tells you whether it can indicate a change in resistance of one milliohm (1mΩ) or one micro-ohm (1µΩ).

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