HD6432351 Datasheet, PDF (659/989 Pages) Renesas Technology Corp – The H8S/2000 CPU has an internal 32-bit architecture, is provided with sixteen 16-bit general registers and a concise

Table 15-6 Analog Pin Specifications
Item
Min
Analog input capacitance
—
Permissible signal source impedance
—
Note: * When V_CC = 4.0 V to 5.5 V and ø ≤ 12 MHz
Max
Unit
20
pF
10*
kΩ
AN0 to
AN7
10 kΩ
To A/D
converter
20 pF
Note: Values are reference values.
Figure 15-8 Analog Input Pin Equivalent Circuit
A/D Conversion Precision Definitions: H8S/2350 Series 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'000) to
B'0000000001 (H'001) (see figure 15-10).
• 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 15-10).
• Quantization error
The deviation inherent in the A/D converter, given by 1/2 LSB (see figure 15-9).
• 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.
639