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7721 Datasheet(PDF) 264 Page - Renesas Technology Corp |
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7721 Datasheet(HTML) 264 Page - Renesas Technology Corp |
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264 / 577 page  7721 Group User’s Manual 12–13 A-D CONVERTER 12.4.2 Differential non-linearity error The differential non-linearity error indicates the difference between the 1 LSB step width (the ideal analog input voltage width while the same output code is expected to output) of an A-D converter with ideal characteristics and the actual measured step width (the actual analog input voltage width while the same output code is output). For example, when VREF = 5.12 V, the 1 LSB width of an A-D converter with ideal characteristics is 20 mV, however when the differential non-linearity error is ±1 LSB, the actual measured 1 LSB width is 0 to 40 mV. 12.4 Absolute accuracy and differential non-linearity error Fig. 12.4.2 Differential non-linearity error 0016 0116 0216 0316 0416 0516 0616 0 20 40 60 80 100 120 140 160 180 0716 0816 0916 Output code (A-D conversion result) Differential non-linearity error Analog input voltage (mV) 1 LSB width with ideal A-D conversion characteristics |
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