H8SLASH3021 datasheet(461/712 Pages) RENESAS

461 / 712 page

13. A/D Converter

Rev.2.00 Mar. 22, 2007 Page 437 of 684

REJ09B0352-0200

Table 13.5

Analog Pin Specifications

Item

Min

Max

Unit

Analog input capacitance

—

Permissible signal source impedance

—

20 pF

To A/D

converter

AN0 to

AN7

10 k

Note: Values are reference values.

Figure 13.8 Analog Input Pin Equivalent Circuit

A/D Conversion Precision Definitions: H8/3022 Group 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 0000000000 to 0000000001

(see figure 13.10).

• Full-scale error

The deviation of the analog input voltage value from the ideal A/D conversion characteristic

when the digital output changes from 1111111110 to 1111111111 (see figure 13.10).

• Quantization error

The deviation inherent in the A/D converter, given by 1/2 LSB (see figure 13.9).

• 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.

H8/3021 Datasheet(PDF) 461 Page - Renesas Technology Corp