HD64F36049 datasheet(419/562 Pages) RENESAS

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Section 19 A/D Converter

Rev. 3.00 Mar. 15, 2006 Page 387 of 526

REJ09B0060-0300

19.5

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 19.4).

• 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 0000000000 to 0000000001

(see figure 19.5).

• Full-scale error

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

when the digital output changes from 1111111110 to 1111111111 (see figure 19.5).

• Nonlinearity error

The deviation from the ideal A/D conversion characteristic as the voltage changes from zero to

full scale. This does not include the offset error, full-scale error, or quantization error.

• Absolute accuracy

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

scale error, quantization error, and nonlinearity error.

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