Definition Of The A-D Conversion Accuracy - Mitsubishi Electric M32R Series User Manual

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11.3.5 Definition of the A-D Conversion Accuracy

The following defines the A-D conversion accuracy.
(1) Resolution ............... Number of digital converted codes output by the A-D converter
(2) Nonlinearity error .... Deviation from ideal conversion characteristics after the offset and full-
(3) Offset error .............. Refers to an amount of dislocation by which the actual digital output code
(4) Full-scale error ........ Refers to an amount of dislocation by which the analog input voltage at
H'3FF
H'3FE
H'003
H'002
H'001
H'000
0
Figure 11.3.4 Ideal A-D Conversion Characteristics Relative to the 10-bit A-D Converter's
Analog Input Voltages
scale errors are adjusted to 0. (Figure 11.3.5)
is dislocated from the digital output code obtained from the A-D
converter's ideal conversion line. (Figure 11.3.6)
which the digital output code reached the full-scale value is dislocated
from the nominal value. (Figure 11.3.7)
Ideal A-D conversion characteristic
VREF VREF
1024 X1 1024 X2
11-48
11.3 Functional Description of A-D Converters
A-D conversion characteristic with infinite resolution
VREF
1024 X3
VREF
1024 X1022
Analog input voltage [V]
A-D CONVERTERS
VREF
1024 X1023
VREF
1024 X1024
Ver.0.10