![]() A DAC is generally expected to be monotonic to increments as small as an LSB, but in general the smallest increment for which the DAC remains monotonic determines its monotonicity. Some manufacturers call this parameter the nonlinearity.Ī DAC is said to be monotonic if each digital-code increment produces an output equal to or larger than that of the preceding code. For example, ( 1 2)LSB linearity for an 8-bit DAC corresponds to 0.195%. It is often given as a percentage or as a fraction of an LSB. Linearity is the maximum allowable deviation from an ideal straight line drawn between the zero-scale and full-scale outputs. An 8-bit, DAC has a resolution of 8 bits, or one part in 2 8. The resolution is the smallest increment of output that the DAC can produce. ![]() The resolution of a DAC is given by the number of bits, N. The following is a listing and definitions of key DAC terms and specifications: Digital-to-analog converters are normally chosen for application within a given system on the basis of their resolution and accuracy, which, in turn, is generally determined by N, the number of input bits of the converter.
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