upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 327
upd70f3017ay
Manufacturer Part Number
upd70f3017ay
Description
V850/sa1tm 32-/16-bit Single-chip Microcontroller
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD70F3017AY.pdf
(492 pages)
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(3) Quantization error
(4) Zero-scale error
When analog values are converted to digital values, a ±1/2LSB error naturally occurs. In an A/D converter, an
analog input voltage in a range of ±1/2LSB is converted to the same digital code, so a quantization error
cannot be avoided.
Note that the quantization error is not included in the overall error, zero-scale error, full-scale error, integral
linearity error, and differential linearity error in the characteristics table.
This shows the difference between the actual measurement value of the analog input voltage and the
theoretical value (1/2 LSB) when the digital output changes from 0……000 to 0……001.
111
100
011
010
001
000
1 …… 1
0 …… 0
-1
Figure 11-10. Quantization Error
Figure 11-11. Zero-Scale Error
Zero-scale error
CHAPTER 11 A/D CONVERTER
0
User’s Manual U12768EJ4V1UD
1/2LSB
0
1
Analog input (LSB)
Ideal line
Analog input
2
1/2LSB
Quantization error
3
AV
REF
AV
REF
327
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