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UPD78F9234MC-5A4-A Datasheet, PDF (180/419 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents | |||
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CHAPTER 10 A/D CONVERTER
(5) Full-scale error
This shows the difference between the actual measurement value of the analog input voltage and the theoretical
value (Full-scale â 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 10-15. Zero-Scale Error
Figure 10-16. Full-Scale Error
111
Ideal line
011
Full-scale error
111
010
110
001
000
0
Zero-scale error
1
2
3
AVREF
Analog input (LSB)
Figure 10-17. Integral Linearity Error
1â¦â¦1
Ideal line
101
Ideal line
000
0
AVREFâ3 AVREFâ2 AVREFâ1 AVREF
Analog input (LSB)
Figure 10-18. Differential Linearity Error
1â¦â¦1
Ideal 1LSB width
0â¦â¦0
0
Integral linearity
error
Analog input
AVREF
0â¦â¦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.
178
Sampling
time
Conversion time
Userâs Manual U17446EJ5V0UD
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