Renesas H8/3067 Series User Manual page 613

6. A/D Conversion Accuracy Definitions: A/D conversion accuracy in the H8/3067 Group 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
• Full-scale error: ..........Deviation from ideal A/D conversion characteristic of analog input
• 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
• Absolute accuracy: .....Deviation of digital value from analog input value, including offset
Figure 15.9 A/D Converter Accuracy Definitions (1)
voltage required to raise digital output from minimum voltage value
0000000000 to 0000000001 (figure 15.10)
voltage required to raise digital output from 1111111110 to
1111111111 (figure 15.10)
zero volts to full scale, exclusive of offset error, full-scale error, and
quantization error.
error, full-scale error, quantization error, and nonlinearity error.
Digital
output
Ideal A/D conversion
characteristic
111
110
101
100
011
010
001
000
1/8 2/8 3/8 4/8 5/8 6/8 7/8 FS
Quantization error
Analog input
voltage
Rev. 4.00 Jan 26, 2006 page 589 of 938
Section 15 A/D Converter
REJ09B0276-0400