→Sampling and Quantisation Considerations
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=== Sampling and Quantisation Considerations ===
When considering the component selection for ADC, there are two main dimensions to consider.
The first is the resolution of your conversion - the number of bits you want to represent. The choice here will affect the amount of quantisation noise introduced into your signal. For example, let's assume you have a bipolar input signal that varies between -1V and 1V. With an 8-bit converter, that means that a range of width 2V is represented by values of anything from -127 to 127 (or 255 steps). That means that the input voltage represented by 1 bit of the converted signal is equivalent to 7.84 mV. Assuming a perfectly linear, this means that when an input signal varies from one sample to the next by 3.92 mV or less, its digital representation will not change, whereas
[[File:Sampling-illustration.png|frameless|1000x800px]]
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