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3.2 Typical characteristics

3-25

4502 Group

APPENDIX

Rev.2.01

Feb 02, 2005

REJ09B0193-0201

3.2.9 A/D converter typical characteristics

Fig. 3.2.1 A/D conversion characteristics data

Figure 3.2.1 shows the A/D accuracy measurement data.

(1) Non-linearity error ......................... This means a deviation from the ideal characteristics between V0 to

V1022 of actual A/D conversion characteristics. In Figure 3.2.1, it is

(➃–➀)/1LSB.

(2) Differencial non-linearity error .... This means a deviation from the ideal characteristics between the

input voltages V0 to V1022 necessary to change the output data to

“1.” In Figure 3.2.1, this is ➁/1LSB.

(3) Zero transition error ..................... This means a deviation from the ideal characteristics between the

input voltages 0 to VDD when the output data changes from “0” to “1.”

In Figure 3.2.1, this is the value of ➀.

(4) Full-scale transition error ............. This means a deviation from the ideal characteristics between the

input voltages 0 to VDD when the output data changes from “1022”

to “1023.” In Figure 3.2.1, this is the value of ➃.

(5) Absolute accuracy ........................ This menas a deviation from the ideal characteristics between 0 to

VDD of actual A/D conversion characteristics. In Figure 3.2.1, this is

the value of ERROR in each of ➀, ➂ and ➃.

For the A/D converter characteristics, refer to the section 3.1 Electrical characteristics.

+1LSB

-1LSB

1LSB WIDTH

1022 1023

ERROR

➃

➁

➀

➂

-15

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