764
Table 19-7 Analog Pin Specifications
Item
Min
Max
Unit
Analog input capacitance
—
20
pF
Permissible signal source impedance
—
5
k
Ω
20 pF
To A/D converter
AN0 to AN15
10 k
Ω
Note: Values are reference values.
Figure 19-8 Analog Input Pin Equivalent Circuit
A/D Conversion Precision Definitions: H8S/2633 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'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.
Содержание H8S/2631
Страница 28: ...xviii Appendix G Package Dimensions 1154 ...
Страница 341: ...316 Transfer SAR or DAR DAR or SAR Block area First block Nth block Figure 9 8 Memory Mapping in Block Transfer Mode ...
Страница 918: ...905 ø DREQ0 DREQ1 tDRQS tDRQH Figure 25 19 DMAC DREQ Input Timing ...
Страница 955: ...943 A 2 Instruction Codes Table A 2 shows the instruction codes ...