SH7280 Datasheet, PDF (1035/1726 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine family

Section 20 A/D Converter (ADC)
20.6 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 20.13).
• 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 20.13).
• Quantization error
The deviation inherent in the A/D converter, given by 1/2 LSB (see figure 20.13).
• 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 20.13).
• 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. 1.00 Jun. 26, 2008 Page 1005 of 1692
REJ09B0393-0100