HD64F2638F20J Datasheet, PDF (751/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
Section 17 A/D Converter
AN0 to AN11
10 kΩ
To A/D converter
20 pF
Note: Values are reference values.
Figure 17-8 Analog Input Pin Equivalent Circuit
A/D Conversion Precision Definitions: The chip’s A/D conversion precision definitions are
given below.
• Resolution
The number of A/D converter digital output codes
• 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'00) to
B'0000000001 (H'01) (see figure 17-10).
• 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'3E) to B'1111111111 (H'3F) (see
figure 17-10).
• Quantization error
The deviation inherent in the A/D converter, given by 1/2 LSB (see figure 17-9).
• Nonlinearity error
The error with respect to the ideal A/D conversion characteristic between the zero voltage and
the full-scale voltage. Does not include the offset error, full-scale error, or quantization error.
• Absolute precision
The deviation between the digital value and the analog input value. Includes the offset error,
full-scale error, quantization error, and nonlinearity error.
REJ09B0103-0800 Rev. 8.00
May 28, 2010
Page 701 of 1458