HD64336901G Renesas Technology, HD64336901G Datasheet - Page 292

• Manufacturer Part Number: HD64336901G
• Description: (HD64xxx Series) 16-BIT MICROCONTROLLER
• Manufacturer: Renesas Technology

16.5
This LSI's A/D conversion accuracy definitions are given below.
Rev. 1.00, 11/03, page 264 of 376
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 16.4).
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 16.5).
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 16.5).
Nonlinearity error
The error with respect to the ideal A/D conversion characteristics between zero voltage and
full-scale voltage. Does not include 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 16.4 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