HFBR-0507 Hewlett-Packard (acquired by Agilent Technologies, Inc.), HFBR-0507 Datasheet - Page 3

• Manufacturer Part Number: HFBR-0507
• Description: 125 Megabaud Versatile Link The Versatile Fiber Optic Connection
• Manufacturer: Hewlett-Packard (acquired by Agilent Technologies, Inc.)

Plastic Optical Fiber (1 mm POF) Transmitter Application Circuit:
Performance of the HFBR-15X7 transmitter in the recommended application circuit (Figure 1) for POF; 1-
125 MBd, 25 C.
Hard Clad Silica Fiber (200 m HCS) Transmitter Application Circuit:
the HFBR-15X7 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 HFBR-15X7 LED. The low level LED “off” current, sometimes
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
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:
referred to as “hold-on” current, is prebias supplied to the LED during the off state to facilitate fast switching speeds.
Parameter
Parameter
Average Modulated Power = ––——————————————————————
Symbol
P
Symbol
P
I
I
I
mod
F,H
t
F,L
CC
avg
t
P
[P
r
f
P
I
I
I
mod
F,H
F,L
t
t
CC
avg
avg
r
f
@ 80% duty cycle - P
Typical
-11.3
-9.7
110
Typical
2.1
2.8
19
45
3
-14.6
-16.2
130
3.1
3.4
(2) [0.80 - 0.20]
60
30
6
Unit
dBm
dBm
avg
mA
mA
mA
ns
ns
Unit
%
dBm
dBm
mA
mA
mA
ns
ns
%
@ 20% duty cycle]
Condition
50% Duty
Condition
50% Duty
5 MHz
5 MHz
Cycle
5 MHz
5 MHz
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
19