H8SSLASH2225 datasheet(788/1071 Pages) RENESAS

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Section 17 A/D Converter

Rev. 5.00 Aug 08, 2006 page 702 of 982

REJ09B0054-0500

17.7

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 17.7).

• 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 17.8).

• 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 17.8).

• Nonlinearity error

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

scale voltage. Does not include offset error, full-scale error, or quantization error (see figure

17.8).

• Absolute accuracy

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

scale error, quantization error, and nonlinearity error.

H8S/2225 数据表(PDF) 788 Page - Renesas Technology Corp