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4507_M Datasheet, PDF (196/216 Pages) Renesas Technology Corp – 4-BIT CISC SINGLE-CHIP MICROCOMPUTER 4500 SERIES | |||
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4507 Group
APPENDIX
3.2 Typical characteristics
3.2.10 A/D converter typical characteristics
15
â
1LSB WIDTH
â
0
ERROR
-15 0 1
+1LSB
0
â
â
-1LSB
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
(âââ)/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
â1.â In Figure 3.2.1, this is â/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 â0â to â1.â
In Figure 3.2.1, this is the value of â.
(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 â1022â
to â1023.â In Figure 3.2.1, this is the value of â.
(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 â, â and â.
For the A/D converter characteristics, refer to the section 3.1 Electrical characteristics.
Rev.2.01 Feb 04, 2005
REJ09B0195-0201
3-30
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