Document Outline
- Features
- Applications
- Description
- Figure 1 - Pin Diagram
- Figure 2 - Functional Schematic
- Optical and Electrical Characteristics - Case Temperature 25 C
- Absolute Maximum Ratings
- Thermal Characteristics
- Typical Fiber-Coupled Power
- Figure 3 - Relative Fiber-coupled Power vs. z - Axial Displacement of Fiber
- Figure 4 - Felative Fiber-coupled Power vs. r - Radial Displacement of Fiber
- Figure 5 - Relative Fiber-coupled Power vs. Forward Current
- Figure 6 - Max. Electrical Power Disapation vs. Operating Temperature
- Figure 7 - Forward Current vs. Forward Voltage
- Figure 8 - Peak Forward Current vs. Operating Temperature
1
Zarlink Semiconductor Inc.
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 2001-2004, Zarlink Semiconductor Inc. All Rights Reserved.
Features
850 nm Surface-Emitting LED
70 MHz Bandwidth
Uniform phase distribution
Designed for 200/280 m fiber
Applications
Electronic Distance Measurement (EDM)
Sensors
Avionics
Description
This device is capable of providing high power into
large-core fiber over a wide temperature range. Thanks
to its very uniform phase distribution of the optical
power, it is ideal for Electronic Distance Measurement
equipment.
Ordering Information
MF228
TO-46 Package
MF228 ST
ST Housing
MF228 SC
SC Housing
MF228 SMA
SMA Housing
MF228 FC
FC Housing
-40
C to +85
C
Note: Rated Fiber coupled power apply only on the TO-46
package, for housing options fiber coupled power is
typically 10% less
MF228
850 nm, 50 MHz High Performance LED
Data Sheet
Figure 1 - Pin Diagram
Figure 2 - Functional Schematic
ANODE
CASE
Bottom View
CATHODE
Anode in electrical contact with the case
ANODE
CATHODE
October 2004
MF228
Data Sheet
2
Zarlink Semiconductor Inc.
Note 1: Measured at the exit of 100 meters of fiber.
Optical and Electrical Characteristics - Case Temperature 25
C
Parameter
Symbol
Min.
Typ.
Max.
Unit
Test Condition
Fiber-Coupled Power
(Figures 3, 4, and 5) (Table 1)
P
fiber
1000
1200
W
I
F
= 100 mA
(Note 1)
Fiber:
200/280
m
Step
Index
NA = 0.24
Rise and Fall Time (10-90%)
t
r
,t
f
7
10
ns
I
F
= 100 mA
(no bias)
Bandwidth (3dB
el
)
f
c
50
MHz
I
F
= 100 mA
Peak Wavelength
p
830
850
870
nm
I
F
= 100 mA
Spectral Width (FWHM)
50
nm
I
F
= 100 mA
Forward Voltage (Figure 7)
V
F
1.8
2.2
V
I
F
= 100 mA
Reverse Current
I
R
20
A
V
R
= 1 V
Capacitance
C
250
pF
V
R
-0 V, f = 1 MHz
Absolute Maximum Ratings
Parameter
Symbol
Limit
Storage Temperature
T
stg
-55 to +125
C
Operating Temperature (derating: Figure 6)
T
op
-40 to +85
C
Electrical Power Dissipation (derating: Figure 6)
P
tot
250 mW
Continuous Forward Current (f<10 kHz)
I
F
110 mA
Peak Forward Current (duty cycle<50%,f>1 MHz
I
FRM
180 mA
Reverse Voltage
V
R
1.5 V
Soldering Temperature (2mm from the case for 10 sec.)
T
sld
260
C
Thermal Characteristics
Parameter
Symbol
Min.
Typ.
Max.
Unit
Thermal Resistance - Infinite Heat Sink
R
thjc
100
C/W
Thermal Resistance - No Heat Sink
R
thja
400
C/W
Temperature Coefficient - Optical Power
dP/dT
j
-0.4
%/
C
Temperature Coefficient - Wavelength
d
/dT
j
0.3
nm/
C
Typical Fiber-Coupled Power
Core Diameter/Cladding Diameter Numerical Aperture
50/125
m
0.20
62.5/125
m
0.275
100/140
m
0.29
200/230
m
0.37
200/280
m
0.24
60
W
150
W
450
W
1300
W
1200
W
MF228
Data Sheet
3
Zarlink Semiconductor Inc.
Figure 3 - Relative Fiber-coupled Power vs. z - Axial Displacement of Fiber
Figure 4 - Felative Fiber-coupled Power vs. r - Radial Displacement of Fiber
0
10
20
30
40
50
60
70
80
90
100
0.5
0.75
1
1.25
1.5
1.75
2
2.25
2.5
2.75
3
z - Axial Displacem ent of Fiber (m )
Relative Fiber-Coupled Power (%)
z
r
r - optimal
C
= 200
m
(
m)
0
20
40
60
80
100
0
20
40
60
80
100
120
140
160
180
200
r - Radial Displacem ent of Fiber (
m)
Relative Fiber-Coupled Power (%)
%
z
r
z - optimal
C
= 200
m
MF228
Data Sheet
4
Zarlink Semiconductor Inc.
Figure 5 - Relative Fiber-coupled Power vs. Forward Current
Figure 6 - Max. Electrical Power Disapation vs. Operating Temperature
0
10
20
30
40
50
60
70
80
90
100
0
20
40
60
80
100
120
140
160
180
200
Forward Current (mA)
Relative Fiber-Coupled Power (%)
50% Duty Cycle
Heat Sinked
DC
0
50
100
150
200
250
300
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
Operating Tem perature (
o
C)
Max. Electrical Power Dissipation (mV)
No Heat Sink
Infinite Heat Sink
Note: Maximum junction temperature can be increased to 150 C after additional burn-in and screening.
MF228
Data Sheet
5
Zarlink Semiconductor Inc.
Figure 7 - Forward Current vs. Forward Voltage
Figure 8 - Peak Forward Current vs. Operating Temperature
0
50
100
150
200
0
0.5
1
1.5
2
2.5
3
Forw ard Voltage (V)
Forward Current (mA)
0
40
80
120
160
200
-60
-40
-20
0
20
40
60
80
100
120
140
Operating Tem perature (
O
C)
Peak Forward Current (mA)
Note: Dashed line indicate that the pow er
dissipation may exceed the maximum ratings.
a) P fiber = const.1450 W peak
b) P fiber = const.1200 W peak
c) P fiber = const.950 W peak
d) P fiber = const.700 W peak
a
b
c
d
Heat Sinked
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