CHAPTER 11 A/D CONVERTER
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User’s Manual U15195EJ5V0UD
(5) Full-scale error
This shows the difference between the actual measurement value of the analog input voltage and the
theoretical value (3/2LSB) when the digital output changes from 1……110 to 1……111.
Figure 11-19. Full-Scale Error
100
011
010
000
0
AV
DDn
AV
DDn
–1
AV
DDn
–2
AV
DDn
–3
Digital output (Lo
w
er 3 bits)
Analog input (LSB)
Full-scale error
111
(n = 0, 1)
(6) Differential linearity error
While the ideal width of code output is 1LSB, this indicates the difference between the actual measurement
value and the ideal value.
Figure 11-20. Differential Linearity Error
0
AV
DDn
(n = 0, 1)
Digital output
Analog input
Differential
linearity error
1……1
0……0
Ideal 1LSB width