ANALOG-TO-DIGITAL CONVERSION

Feb 3rd, 2012
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The task of the analog-to-digital converter (ADC) is the inverse of the digitalto- analog converter: to convert an analog input signal into a numerical digital value.

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ANALOG-TO-DIGITAL CONVERSIONThe task of the analog-to-digital converter (ADC) is the inverse of thedigitalto- analog converter: to convert an analog input signal into anumerical digital value. The specifications for an ADC are similar tothose for a DAC: offset, gain, linearity, missing codes, conversion timeand so on, as explained below.Offset error is the difference between the analog input level whichcauses a first bit transition to occur and the level corresponding to 1/2LSB. This shouldof course ideally be zero, i.e., the first bit transition should take place ata level represent

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