3069RF-ZTAT Datasheet, PDF (581/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

6. A/D Conversion Accuracy Definitions: A/D conversion accuracy in the H8/3069R 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.
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 15.9 A/D Converter Accuracy Definitions (1)
Rev. 5.0, 09/04, page 559 of 978