SH7052 datasheet(614/919 Pages) RENESAS

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Table 16.5

Analog Pin Specifications

Item

Min

Max

Unit

Analog input capacitance

—

Permissible signal source impedance

—

Ω

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.

SH7052 Datasheet(PDF) 614 Page - Renesas Technology Corp