LG G3F-AD3A User Manual page 10

Chapter 1 Introduction
2) 0 ~ 10VDC range
When the A/D m o d u le operates with 0 ~ 10VDC range, the 0VDC analog input i s
convert ed to di gital 0, and the 10VDC analog input i s converted into digital output 4000.
Therefore, the resolution per 1 digital value is 0.0025VDC.
4000
2000
0
0 V
3) –10 ~ 10VDC range
W h e n the A/D m odule operates with –1 0 ~ 10VDC range, the
convert ed to di gital 0, and the 1 0V D C a n a l og input is converted into digital output 4000.
Therefore, the resolution per 1 digital value is 0.005VDC.
4000
2000
0
- 10V
5V
Analog input voltage
Figure 1.4 A/D conversion characteristic ( 0 ~ 10VDC )
0V
Analog input voltage
Figure 1.5 A/D conversion characteristic ( -10 ~ 10VDC )
2002
2001
2000
1999
1998
4.995V
10V
4.9975V
2002
2001
2000
1999
1998
- 0.010V
10V
- 0.005V
1-4
5.005V
5.0025V
5.000V
1 0 V D C a n a log input is
0.010V
0.005V
0.000V