SH7052 Datasheet, PDF (614/919 Pages) Renesas Technology Corp – SuperHTM RISC engine

Table 16.5 Analog Pin Specifications
Item
Analog input capacitance
Permissible signal source impedance
Min
Max
Unit
—
20
pF
—
3
kΩ
16.6.1 A/D conversion accuracy definitions
A/D conversion accuracy definitions are given below.
1. Resolution
The number of A/D converter digital conversion output codes
2. 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 0000000000 to 0000000001
(does not include quantization error) (see figure 16.9).
3. Full-scale error
The deviation of the analog input voltage value from the ideal A/D conversion characteristic
when the digital output changes from 1111111110 to 111111111 (does not include
quantization error) (see figure 16.9).
4. Quantization error
The deviation inherent in the A/D converter, given by 1/2 LSB (see figure 16.9).
5. 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.
6. Absolute accuracy
The deviation between the digital value and the analog input value. Includes the offset error,
full-scale error, quantization error, and nonlinearity error.
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