40 kBd Link
System Performance Under recommended operating conditions unless otherwise specified.
Parameter
Symbol
Min.
Typ.
Max. Units
Conditions
Ref.
Data Rate
dc
40
kBd
BER ≤10-9, PRBS: 27 - 1
Link Distance
(Standard Cable)
13
94
41
138
m
m
IFdc = 2 mA
IFdc = 60 mA
Fig. 21
Note 1
Link Distance
(Improved Cable)
15
111
45
154
m
m
IFdc = 2 mA
IFdc = 60 mA
Fig. 22
Note 1
Propagation
Delay
tPLH
tPHL
4
2.5
µs
µs
RL = 3.3 kΩ, CL = 30 pF
PR = -25 dBm, 1 m fiber
Fig. 22, 25
Note 2
Pulse Width
tD
7
µs
-39 ≤PR≤- 14 dBm
Fig. 23, 24
Distortion tPLH-tPHL
RL = 3.3 kΩ, CL = 30 pF
Notes:
1. Estimated typical link life expectancy at 40°C exceeds 10 years at 60 mA.
2. The propagation delay for one metre of cable is typically 5 ns.
Figure 20. Typical 40 kBd interface circuit
120
100
80
120
100
80
60
60
40
40
20
20
10
6
10
4
6
4
HFBR-15X3/25X3
HFBR-15X3/25X3
2
0°C–70°C
25°C
0°C–70°C
25°C
1
2
0
10 20 30 40 50 60 70 80 90 100
– CABLE LENGTH – METRES
0
10 20 30 40 50 60 70 80 90 100 110
– CABLE LENGTH – METRES
Figure 21. Guaranteed system performance with standard cable
Figure 22. Guaranteed system performance with improved cable
15