M16C62_M Datasheet, PDF (455/615 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

A-D Converter
Mitsubishi microcomputers
M16C / 62A Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Differential non-linearity error
Differential non-linearity error refers to the difference between 1-LSB width based on the theoretical A-
D conversion characteristics (an analog input width that can meet the expectation of outputting an
equal code) and an actually measured 1-LSB width (analog input voltage width that outputs an equal
code). If 10-bit resolution is used and if VREF (reference voltage) = 5.12 V, “differential non-linearity
error = ± 1LSB” refers to the fact that 1-LSB width actually measured falls on a range from 0 mV to 10
mV though 1-LSB width based on the theoretical A-D conversion characteristics is 5 mV.
Output code
(result of A-D conversion)
00916
00816
00716
1LSB width for theoretical A-D
conversion characteristic
00616
00516
00416
00316
00216
00116
00016
0
Differential non-linear error
5 10 15 20 25 30 35 40 45
Analog input voltage (mV)
Figure 2.7.27. Differential non-linearity error (10-bit resolution)
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