Datasheet

Section 19 A/D Converter
R01UH0166EJ0600 Rev. 6.00 Page 923 of 1434
Mar 02, 2011
H8S/2633 Group, H8S/2633 F-ZTAT
TM
,
H8S/2633R F-ZTAT
TM
, H8S/2695
20 pF
To A/D converterAN0 to AN15
10 kΩ
Note: Values are reference values.
Figure 19.8 Analog Input Pin Equivalent Circuit
A/D Conversion Precision Definitions: H8S/2633 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'00) to
B'0000000001 (H'01) (see figure 19.10).
• 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'3E) to B'1111111111 (H'3F) (see
figure 19.10).
• Quantization error
The deviation inherent in the A/D converter, given by 1/2 LSB (see figure 19.9).
• 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.