ADM485–Typical Performance Characteristics
5
1.0
4
0.9
100
90
0.8
TIME – ns
TIME – ns
3
0.7
2
0.6
10
1
0.5
0%
0
–50
–25
0
25
50
75
TEMPERATURE – °C
100
125
0.4
–50
1
V
1
V
5n
s
–25
0
25
50
75
TEMPERATURE – °C
100
125
Figure 20. Receiver t
PLH
–t
PHL
, vs.
Temperature
Figure 21. Driver Skew vs.
Temperature
Figure 22. Unloaded Driver
Differential Outputs
100
90
100
90
100
90
10
0%
10
0%
10
0%
500m
V
500m
V
5n
s
1
V
1
V
5
HO
5
10ns
1
V
1
V
5
H
O
5
10ns
Figure 23. Loaded Driver
Differential Outputs
Figure 24. Driver/Receiver Propa-
gation Delays Low to High
Figure 25. Driver/Receiver Propaga-
tion Delays High to Low
RT
RT
D
D
R
R
R
D
D
R
Figure 26. Typical RS-485 Network
–6–
REV. A
AD [ ANALOG DEVICES ]
