Hitachi H8/3022 Hardware Manual page 436

Table 13-5 Analog Pin Specifications
Item
Analog input capacitance
Permissible signal source impedance
A/D Conversion Precision Definitions: H8/3022 Series 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 0000000000 to 0000000001
(see figure 13-10).
• Full-scale error
The deviation of the analog input voltage value from the ideal A/D conversion characteristic
when the digital output changes from 1111111110 to 1111111111 (see figure 13-10).
• Quantization error
The deviation inherent in the A/D converter, given by 1/2 LSB (see figure 13-9).
• 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.
AN to
0
AN
7
Note: Values are reference values.
Figure 13-8 Analog Input Pin Equivalent Circuit
Min
—
—
10 kΩ
To A/D
converter
20 pF
Max Unit
20 pF
5 kΩ
425