HD6413002 Datasheet, PDF (511/700 Pages) Renesas Technology Corp – High-performance single-chip microcontroller

6. A/D Conversion Accuracy Definitions: A/D conversion accuracy in the H8/3002 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 14-10)
• Full-scale error:...........Deviation from ideal A/D conversion characteristic of analog input
voltage required to raise digital output from 1111111110 to 1111111111
(figure 14-10)
• Quantization error:......Intrinsic error of the A/D converter; 1/2 LSB (figure 14-9)
• 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.
Digital
output
Ideal A/D conversion
111
characteristic
110
101
100
011
010
Quantization error
001
000
1/8 2/8 3/8 4/8 5/8 6/8 7/8 FS
Analog input
voltage
Figure 14-9 A/D Converter Accuracy Definitions (1)
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