4524_M Datasheet, PDF (283/310 Pages) Renesas Technology Corp – 4-BIT CISC SINGLE-CHIP MICROCOMPUTER 720 FAMILY / 4500 SERIES

4524 Group
APPENDIX
3.2 Typical characteristics
3.2.8 A/D converter typical characteristics
15
➁
1LSB WIDTH
+1LSB
➀
0
ERROR
0
➂
➃➄
-1LSB
-15
0
1
1022 1023
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) Differential 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 ➄.
(5) Absolute accuracy ........................ This means 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, ➃ and ➄.
For the A/D converter characteristics, refer to the section 3.1 Electrical characteristics.
Rev.2.00 Aug, 06 2004
REJ09B0107-0200Z
3-29