HD6433682 ETC, HD6433682 Datasheet - Page 356

• Manufacturer Part Number: HD6433682
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series
• Manufacturer: ETC

18.5
This LSI's A/D conversion accuracy definitions are given below.
Rev. 3.00, 05/03, page 326 of 472
Resolution
The number of A/D converter digital output codes
Quantization error
The deviation inherent in the A/D converter, given by 1/2 LSB (see figure 18.4).
Offset error
The deviation of the analog input voltage value from the ideal A/D conversion characteristic
when the digital output changes from the minimum voltage value 0000000000 to 0000000001
(see figure 18.5).
Full-scale error
The deviation of the analog input voltage value from the ideal A/D conversion characteristic
when the digital output changes from 1111111110 to 1111111111 (see figure 18.5).
Nonlinearity error
The deviation from the ideal A/D conversion characteristic as the voltage changes from zero to
full scale. This does not include the offset error, full-scale error, or quantization error.
Absolute accuracy
The deviation between the digital value and the analog input value. Includes offset error, full-
scale error, quantization error, and nonlinearity error.
A/D Conversion Accuracy Definitions
Figure 18.4 A/D Conversion Accuracy Definitions (1)
Digital output
111
110
101
100
011
010
001
000
1
8
2
8
Ideal A/D conversion
characteristic
3
8
Quantization error
4
8
5
8
6
8
7
8
Analog
input voltage
FS