H8SXSLASH1663M datasheet(1122/1504 Pages) RENESAS

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Section 22 A/D Converter

Rev. 2.00 Sep. 24, 2008 Page 1090 of 1468

REJ09B0412-0200

22.6

A/D Conversion Accuracy Definitions

This LSI's A/D conversion accuracy definitions are given below.

• Resolution

The number of A/D converter digital output codes.

• Quantization error

The deviation inherent in the A/D converter, given by 1/2 LSB (see figure 22.9).

• Offset error

The deviation of the analog input voltage value from the ideal A/D conversion characteristic

when the digital output changes from the minimum voltage value B'0000000000 (H'000) to

B'0000000001 (H'001) (see figure 22.10).

• Full-scale error

The deviation of the analog input voltage value from the ideal A/D conversion characteristic

when the digital output changes from B'1111111110 (H'3FE) to B'1111111111 (H'3FF) (see

figure 22.10).

• Nonlinearity error

The error with respect to the ideal A/D conversion characteristic between the zero voltage and

the full-scale voltage. Does not include the offset error, full-scale error, or quantization error

(see figure 22.10).

• Absolute accuracy

The deviation between the digital value and the analog input value. Includes the offset error,

full-scale error, quantization error, and nonlinearity error.

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