HD6433044 Datasheet, PDF (551/867 Pages) Hitachi Semiconductor – Hitachi Single-Chip Microcomputer

AN₀ to AN₇
10 kΩ
To A/D converter
20 pF
Note: Numeric values are approximate.
Figure 15-8 Analog Input Pin Equivalent Circuit
Table 15-5 Analog Input Pin Ratings
Item
min
max
Unit
Analog input capacitance
—
20
pF
Allowable signal-source impedance
—
10*
kΩ
Note: * When V_CC = 4.0 V to 5.5 V and ø ≤ 12 MHz.
7. A/D Conversion Accuracy Definitions: A/D conversion accuracy in the H8/3048 Series is
defined as follows:
• Resolution:..................Digital output code length of A/D converter
• Offset error:.................Deviation from ideal A/D conversion characteristic of analog input
voltage required to raise digital output from minimum voltage value
0000000000 to 0000000001 (figure 15-10)
• Full-scale error:...........Deviation from ideal A/D conversion characteristic of analog input
voltage required to raise digital output from 1111111110 to
1111111111 (figure 15-10)
• Quantization error:......Intrinsic error of the A/D converter; 1/2 LSB (figure 15-9)
• Nonlinearity error: ......Deviation from ideal A/D conversion characteristic in range from zero
volts to full scale, exclusive of offset error, full-scale error, and
quantization error.
• Absolute accuracy:......Deviation of digital value from analog input value, including offset
error, full-scale error, quantization error, and nonlinearity error.
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