Hitachi F-ZTAT H8/3039 Series Hardware Manual page 438

Table 13-5 Analog Pin Specifications
Item
Analog input capacitance
Permissible signal source impedance
= 4.0 V to 5.5 V and ø ≤ 12 MHz
Note: * When V
CC
A/D Conversion Precision Definitions: H8/3039 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 B'0000000000 (H'000) to
B'0000000001 (H'001) (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 B'1111111110 (H'3FE) to B'1111111111 (H'3FF) (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
10* kΩ
429