HD6432621 Hitachi, HD6432621 Datasheet - Page 644
HD6432621
Manufacturer Part Number
HD6432621
Description
(HD64F262x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432621.pdf
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Table 16-7 Analog Pin Specifications
Item
Analog input capacitance
Permissible signal source impedance
A/D Conversion Precision Definitions: H8S/2626 Series and H8S/2623 Series A/D conversion
precision definitions are given below.
600
Note: Values are reference values.
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 16-10).
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 16-10).
Quantization error
The deviation inherent in the A/D converter, given by 1/2 LSB (see figure 16-9).
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.
Figure 16-8 Analog Input Pin Equivalent Circuit
AN0 to AN15
10 k
Min
—
—
20 pF
To A/D converter
Max
20
5
Unit
pF
k
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