UPD78F1502AGK-GAK-AX Datasheet, PDF (429/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 10 12-BIT A/D CONVERTER (μ PD78F150xA),
10-BIT A/D CONVERTER (μ PD78F151xA)
(5) Full-scale error
This shows the difference between the actual measurement value of the analog input voltage and the theoretical
value (Full-scale − 3/2LSB) when the digital output changes from 1......110 to 1......111.
(6) Integral linearity error
This shows the degree to which the conversion characteristics deviate from the ideal linear relationship. It expresses
the maximum value of the difference between the actual measurement value and the ideal straight line when the zero-
scale error and full-scale error are 0.
(7) 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 10-24. Zero-Scale Error
111
Ideal line
011
Figure 10-25. Full-Scale Error
Full-scale error
111
010
110
001
000
0
Zero-scale error
1
2
3
AVREF
Analog input (LSB)
Figure 10-26. Integral Linearity Error
1......1
Ideal line
101
Ideal line
000
0
AVREF−3 AVREF−2 AVREF−1 AVREF
Analog input (LSB)
Figure 10-27. Differential Linearity Error
1......1
Ideal 1LSB width
0......0
0
Integral linearity
error
Analog input
AVREF
0......0
0
Differential
linearity error
Analog input
AVREF
(8) Conversion time
This expresses the time from the start of sampling to when the digital output is obtained.
The sampling time is included in the conversion time in the characteristics table.
(9) Sampling time
This is the time the analog switch is turned on for the analog voltage to be sampled by the sample & hold circuit.
Sampling
time
Conversion time
R01UH0004EJ0501 Rev.5.01
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Jun 20, 2011