LG G4F-AD3A - Manual (Page 9)

Chapter 1 Introduction
1-3
1.3 Analog-to-Digital conversion characteristics
1.3.1 Voltage input
The A/D m o d u le converts the analog input from external devices to the digital value that
can be handled by CPU module.
W h e n the analog input is voltage input, the K4F-A D 3 A a n d K 7 F-A D 3 A h a s two input
r a n g e s s u c h a s 1 ~ 5 V D C a n d 0 ~ 1 0 V D C . T h e K 3 F -A D 2 A h a s three input range such as
1 ~ 5 V D C , 0 ~ 10VDC, and –1 0 ~ 1 0 V D C .
W ith all analog input range, the digital output is varied in the range of 0 ~ 4000. Therefore,
the resolution of the A/D m o d u le is obtained by following equation;
1) 1 ~ 5 V D C range
W h e n the A/D module operates with 1 ~ 5VDC range, the 1VDC analo g input is
converted to digital 0, and the 5VD C a n a log input is converted into digital output 4000.
Therefore, the resolution per 1 digital value is 0.001VDC.
Figure 1.3 A/D conversion characteristics ( 1 ~ 5VDC )
2000
2001
2002
1998
1999
3.000V
3.001V 2.999V
3.002V 2.998V
4000
2000
0
3 V 5 V
Analog input voltage
D
igital output value
1 V
4000
voltage input Minimum voltage input Maximum
module A/D of Resolution
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=