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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 m 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 25C Parameter Fiber-Coupled Power (Figures 3, 4, and 5) (Table 1) Rise and Fall Time (10-90%) Bandwidth (3dBel) Peak Wavelength Spectral Width (FWHM) Forward Voltage (Figure 7) Reverse Current Capacitance
Note 1:
Data Sheet
Symbol Pfiber tr,tf fc p VF IR C
Min. 1000
Typ. 1200 7 50
Max.
Unit W
Test Condition IF = 100 mA (Note 1) IF = 100 mA (no bias) IF = 100 mA IF = 100 mA IF = 100 mA IF = 100 mA VR = 1 V VR-0 V, f = 1 MHz Fiber: 200/280 m Step Index NA = 0.24
10
ns MHz
830
850 50 1.8 250
870 2.2 20
nm nm V A 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 Rthjc Rthja dP/dTj d/dTj -0.4 0.3 Min. Typ. Max. 100 400 Unit
Symbol Tstg Top Ptot IF IFRM VR Tsld
Limit -55 to +125C -40 to +85C 250 mW 110 mA 180 mA 1.5 V 260C
C/W
C/W
%/C nm/C
Typical Fiber-Coupled Power Core Diameter/Cladding Diameter Numerical Aperture 50/125 m 0.20 60 W 62.5/125 m 0.275 150 W 100/140 m 0.29 450W 200/230 m 0.37 1300 W 200/280 m 0.24 1200 W
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 OC = 200 m
z - Axial Displacem ent of Fiber (m) (m )
Figure 3 - Relative Fiber-coupled Power vs. z - Axial Displacement of Fiber
100
z
%
r
Relative Fiber-Coupled Power (%)
80
z - optimal OC = 200 m
60
40
20
0 0 20 40 60 80 100 120 140 160 180 200 r - Radial Displacem ent of Fiber ( 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 ( oC)
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 W peak = const.1200 W peak = const.950 W peak = const.700 W peak
40
0 -60
-40
-20
0
20
40
60
O
80
100
120
140
Operating Tem perature ( C)
Figure 8 - Peak Forward Current vs. Operating Temperature
5 Zarlink Semiconductor Inc.
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