h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 708

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 20 A/D Converter
A/D Conversion Precision Definitions: H8S/2169 or H8S/2149 A/D conversion precision
definitions are given below.
Rev. 3.00 Jan 18, 2006 page 680 of 1044
REJ09B0280-0300
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'000) to
B'0000000001 (H'001) (see figure 20.10).
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'3FE) to B'1111111111 (H'3FF) (see
figure 20.11).
Quantization error
The deviation inherent in the A/D converter, given by 1/2 LSB (see figure 20.9).
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.
Note: Numeric values are reference values.
Figure 20.8 Analog Input Pin Equivalent Circuit
AN0 to AN7
10 k
20 pF
To A/D converter