HFBR-5527 Agilent(Hewlett-Packard), HFBR-5527 Datasheet - Page 3

• Manufacturer Part Number: HFBR-5527
• Description: 125 Megabaud Fiber Optic Transceiver JIS FO7 Connection
• Manufacturer: Agilent(Hewlett-Packard)

Hard Clad Silica Fiber (200 m HCS) Transmitter Application Circuit:
the transmitter in the recommended application circuit (Figure 1) for HCS; 1-125 MBd, 25 C.
Notes:
1. Average optical power is measured with an average power meter at 50% duty cycle, after 1 meter of fiber.
2. To allow the LED to switch at high speeds, the recommended drive circuit modulates LED light output between two non-zero power
3. High and low level LED currents refer to the current through the LED. The low level LED “off” current, sometimes referred to as
Plastic Optical Fiber (1 mm POF) Transmitter Application Circuit:
Performance of the transmitter in the recommended application circuit (Figure 1) for POF; 1-125 MBd, 25 C.
Average Optical Power 200 m HCS
Average Modulated Power 200 m HCS
Optical Rise Time (10% to 90%)
Optical Fall Time (90% to 10%)
High Level LED Current (On)
Low Level LED Current (Off)
Optical Overshoot - 200 m HCS
Transmitter Application Circuit
Current Consumption - 200 m HCS
levels. The modulated (useful) power is the difference between the high and low level of light output power (transmitted) or input
power (received), which can be measured with an average power meter as a function of duty cycle (see Figure 3). Average Modulated
Power is defined as one half the slope of the average power versus duty cycle:
“hold-on” current, is prebias supplied to the LED during the off state to facilitate fast switching speeds.
Average Optical Power 1 mm POF
Average Modulated Power 1 mm POF
Optical Rise Time (10% to 90%)
Optical Fall Time (90% to 10%)
High Level LED Current (On)
Low Level LED Current (Off)
Optical Overshoot - 1 mm POF
Transmitter Application Circuit
Current Consumption - 1 mm POF
Parameter
Parameter
Average Modulated Power = ––——————————————————————
Symbol
P
Symbol
P
I
I
I
mod
F,H
F,L
t
t
CC
avg
P
[P
r
P
f
I
I
I
mod
F,H
F,L
t
t
CC
avg
avg
r
f
@ 80% duty cycle - P
Typical
-11.3
Typical
-9.7
115
2.1
2.8
30
45
-14.6
-16.2
3
130
3.1
3.4
(2) [0.80 - 0.20]
60
30
6
Unit
dBm
dBm
avg
mA
mA
mA
Unit
ns
ns
dBm
dBm
%
mA
mA
mA
ns
ns
%
@ 20% duty cycle]
Condition
Condition
50% Duty
50% Duty
5 MHz
5 MHz
5 MHz
5 MHz
Cycle
Cycle
Performance of
Note 1, Fig. 3
Note 2, Fig. 3
Note 1, Fig. 3
Note 2, Fig. 3
Figure 1
Figure 1
Note 3
Note 3
Note 3
Note 3
Note
Note
167