upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 399

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

(3)
(4)
Quantization error
This is an error of 1/2 LSB that inevitably occurs when an analog value is converted into a digital
value.
Because the A/D converter converts analog input voltages in a range of 1/2 LSB into the same
digital codes, a quantization error is unavoidable.
This error is not included in the overall error, zero-scale error, full-scale error, integral linearity
error, or differential linearity error in the characteristics table.
Zero-scale error
This is the difference between the actually measured analog input voltage and its theoretical value
when the digital output changes from 0…000 to 0…001 (1/2 LSB).
1 ...... 1
0 ...... 0
User’s Manual U16702EE3V2UD00
Figure 11-20: Quantization Error
111
100
011
010
001
000
Figure 11-21: Zero-Scale Error
0
1/2 LSB
Chapter 11 A/D Converter
-
1
Zero-scale error
0
1
Analog input (LSB)
Analog input
1/2 LSB
Ideal line
2
Quantization error
3
AV
AV
REF0
REF0
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