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Section 21 A/D Converter
Rev. 4.00 Sep. 14, 2005 Page 814 of 982
REJ09B0023-0400
0FS
111
110
101
100
011
010
001
000
Analog input
voltage
(3) Quantization
error
(4) Nonlinearity
error
(2) Full-scale error
Ideal A/D
conversion
characteristic
Digital output
FS: Full-scale voltage
FS
Analog input
voltage
Actual A/D
convertion
characteristic
(1) Offset error
Ideal A/D
conversion
characteristic
Digital output
1024
1
1024
2
1024
1022
1024
1023
Figure 21.6 Definitions of A/D Conversion Accuracy