H8SLASH3028F datasheet(587/923 Pages) RENESAS

587 / 923 page

Rev. 2.00, 09/03, page 557 of 890

6. A/D Conversion Accuracy Definitions: A/D conversion accuracy in the H8/3028 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

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.

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

Digital

output

Ideal A/D conversion

characteristic

Figure 15.9 A/D Converter Accuracy Definitions (1)

H8/3028F Datasheet(PDF) 587 Page - Renesas Technology Corp