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