Renesas H8S Series Hardware Manual page 580

1
*
Notes: Values are reference values.
1.
2. R
A/D Conversion Precision Definitions: H8S/2357 Group A/D conversion precision definitions are given below.
• Resolution
The number of A/D converter digital output codes
• 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 B'0000000000 (H'000) to B'0000000001 (H'001) (see figure 16-9).
• Full-scale error
The deviation of the analog input voltage value from the ideal A/D conversion characteristic when the digital output
changes from B'1111111110 (H'3FE) to B'1111111111 (H'3FF) (see figure 16-9).
• Quantization error
The deviation inherent in the A/D converter, given by 1/2 LSB (see figure 16-8).
• Nonlinearity error
The error with respect to the ideal A/D conversion characteristic between the zero voltage and the full-scale voltage.
Does not include the offset error, full-scale error, or quantization error.
• Absolute precision
The deviation between the digital value and the analog input value. Includes the offset error, full-scale error,
quantization error, and nonlinearity error.
Rev.6.00 Oct.28.2004 page 552 of 1016
REJ09B0138-0600H
2
R
*
in
1
*
10 µF 0.01 µF
: Input impedance
in
Figure 16-7 Example of Analog Input Protection Circuit
AV
CC
V
ref
100 Ω
AN0 to AN7
0.1 µF
AV
SS