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MB90378 Datasheet(PDF) 57 Page - Fujitsu Component Limited. |
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MB90378 Datasheet(HTML) 57 Page - Fujitsu Component Limited. |
57 / 65 page MB90378 Series 57 6. A/D Converter Glossary Resolution : Analog changes that are identifiable with the A/D converter. Linearity error : The deviation of the straight line connecting the zero transition point (“00 0000 0000” ↔ “00 0000 0001”) with the full-scale transition point (“11 1111 1110” ↔ “11 1111 1111”) from actual conversion characteristics. Differential linearity error : The deviation of input voltage needed to change the output code by 1 LSB from the theoretical value. Total error : The total error is defined as a difference between the actual value and the theoretical value, which includes zero-transition error/full-scale transition error and linearity error. (Continued) 3FFH 3FEH 3FDH 004H 003H 002H 001H AVRL AVRH VNT 0.5 LSB 0.5 LSB {1 LSB × (N − 1) + 0.5 LSB} Actual conversion value (Measured value) Actual conversion value Theoretical characteristics Analog input Total error for digital output N = VNT − {1 LSB × (N − 1) + 0.5 LSB} 1 LSB [LSB] 1 LSB (Theoretical value) = AVR − AVss 1024 [V] VOT (Theoretical value) = AVss + 0.5 LSB [V] VFST (Theoretical value) = AVR − 1.5 LSB [V] VNT : Voltage at a transition of digital output from (N − 1) to N Total error |
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