upd78f0124m6gba1-8et Renesas Electronics Corporation., upd78f0124m6gba1-8et Datasheet - Page 248

• Manufacturer Part Number: upd78f0124m6gba1-8et
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(5) Full-scale error
(6) Integral linearity error
(7) Differential linearity error
(8) Conversion time
(9) Sampling time
248
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.
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.
While the ideal width of code output is 1LSB, this indicates the difference between the actual measurement value
and the ideal value.
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.
This is the time the analog switch is turned on for the analog voltage to be sampled by the sample & hold circuit.
1 …… 1
0 …… 0
Figure 12-17. Integral Linearity Error
010
001
000
011
Figure 12-15. Zero-Scale Error
111
0
0
Ideal line
Ideal line
1
Analog input (LSB)
2
Analog input
Zero-scale error
Integral linearity
error
3
Sampling
time
CHAPTER 12 A/D CONVERTER
AV
AV
User’s Manual U16315EJ3V1UD
REF
REF
Conversion time
Figure 12-18. Differential Linearity Error
1 …… 1
0 …… 0
111
110
101
000
Figure 12-16. Full-Scale Error
0
0
Ideal 1LSB width
AV
REF
Analog input (LSB)
−3
Analog input
Full-scale error
AV
REF
linearity error
Differential
−2
AV
Ideal line
REF
−1
AV
AV
REF
REF