SH7147 Datasheet, PDF (682/1108 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 15 A/D Converter (ADC)
15.6 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 15.8).
• 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 15.8).
• Quantization error
The deviation inherent in the A/D converter, given by 1/2 LSB (see figure 15.8).
• 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 15.8).
• Absolute accuracy
The deviation between the digital value and the analog input value. Includes offset error, full-
scale error, quantization error, and nonlinearity error.
Rev. 3.00 Oct. 06, 2008 Page 658 of 1080
REJ09B0230-0300