
APPENDIX
3.2 Standard characteristics
3-20
3802 GROUP USER’S MANUAL
3.2.3 A-D conversion standard characteristics
Figure 3.2.7 shows the A-D conversion standard characteristics.
The lower-side line on the graph indicates the absolute precision error. It represents the deviation from the
ideal value. For example, the conversion of output code from 127 to 128 occurs ideally at the point of AN
0
= 2550 mV, but the measured value is –5 mV. Accordingly, the measured point of conversion is repre-
sented as “2550 – 5 = 2545 mV.”
The upper-side line on the graph indicates the width of input voltages equivalent to output codes. For
example, the measured width of the input voltage for output code 170 is 23 mV, so the differential nonlinear
error is represented as “23 – 20 = 3 mV” (0.15 LSB).
Fig. 3.2.7 A-D conversion standard characteristics
M38027E8SS A-D CONVERTER STEP WIDTH MEASUREMENT
Measured when a power source voltage is stable in the single-chip mode