SH7211 Datasheet, PDF (815/1228 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family

Section 17 A/D Converter (ADC)
17.6 Definitions of A/D Conversion Accuracy
This LSI's A/D conversion accuracy definitions are given below.
• Resolution
The number of A/D converter digital conversion output codes
• Offset error
The deviation of the actual A/D conversion characteristic from the ideal A/D conversion
characteristic when the digital output value changes from the minimum voltage value (zero
voltage) B'000000000000 to B'000000000001. Does not include a quantization error (see
figure 17.7).
• Full-scale error
The deviation of the actual A/D conversion characteristic from the ideal A/D conversion
characteristic when the digital output value changes from B'111111111110 to the maximum
voltage value (full-scale voltage) B'111111111111. Does not include a quantization error (see
figure 17.7).
• Quantization error
The deviation inherent in the A/D converter, given by 1/2 LSB (see figure 17.7).
• Nonlinearity error
The deviation of the actual A/D conversion characteristic from 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 17.7).
• Absolute accuracy
The deviation between the digital value and the analog input value. Includes offset error, full-
scale error, quantization error, and nonlinearity error.
Rev. 2.00 May. 08, 2008 Page 791 of 1200
REJ09B0344-0200