Infrared LED
High-speed, high-power infrared LED for free
space optics
L7558 series
www.hamamatsu.com
1
The L7558 series LEDs were developed for free space optical communications such as image data signal transmission, and oper-
ate at high speeds of 50 MHz.
The L7558 delivers a high output of 14 mW and is used in combination with a light projection lens. The L7558-01 is sealed in a
metal package capped with a glass lens that produces an angle of view of ±7° (full angle at half maximum).
Both types employ a metal stem package that gives higher reliability than plastic package devices.
Features Applications
High-speed response: 50 MHz Typ. (IF=50 mA)
High reliability
High radiant output power
L7558 : 14 mW Typ. (IF=50 mA)
L7558-01: 7 mW Typ. (IF=50 mA)
FSO (free space optics)
Absolute maximum ratings (Ta=25 °C)
Electrical and optical characteristics (Ta=25 °C)
Parameter Symbol Condition Value Unit
Forward current IF100 mA
Reverse voltage VR5V
Pulse forward current IFP Pulse width=10 μs
Duty ratio=1 % 1.0 A
Operating temperature Topr -30 to +85 °C
Storage temperature Tstg -40 to +100 *°C
* Guaranteed to resist temperature cycle test of up to 5 cycles.
Parameter Symbol Condition L7558 L7558-01 Unit
Min. Typ. Max. Min. Typ. Max.
Peak emission wavelength λpIF=50 mA 820 850 880 820 850 880 nm
Spectral half width Δλ IF=50 mA - 50 - - 50 - nm
Forward voltage VFIF=50 mA - 1.45 1.60 - 1.45 1.60 V
Pulse forward voltage VFP IF=1 A - 3.4 4.3 - 3.4 4.3 V
Reverse current IRVR=5 V - -10- -10 μA
Radiant fl ux φeIF=50 mA 11 14 - 5.5 7.0 - mW
Radiant illuminance PEIF=50 mA - 1.5 - - 4.0 - mW/cm2
Cut-off frequency fc IF=50 mA ± 1mAp-p 35 50 - 35 50 - MHz
Infrared LED L7558 series
2
Emission spectrum
Forward current vs. forward voltage
Directivity
Radiant flux vs. forward current
Frequency characteristic
Radiant output vs. ambient temperature
700 800 900 1000
0
40
20
60
80
100
Wavelength (nm)
Relative radiant output (%)
(Typ. Ta=25 °C, IF=50 mA)
1.0 1.5 2.0 2.5 3.0 3.5
10
100
1000
Forward voltage (V)
Forward current (mA)
(Typ. Ta=25 °C, tw=100 µs, 1 %)
90°
80°
70°
60°
50°
30°
Relative radiant output (%)
40°
90°
80°
70°
60°
50°
30°
40°
20° 10° 0° 10° 20°
(Typ. Ta=25 °C)
L7558
L7558-01
80 %
100 %
40 %
60 %
20 %
Forward current (mA)
(Typ. Ta=25 °C, tw=100 µs, 0.1 %)
Radiant flux (mW)
101
1
10
1000
100
100 1000
L7558
L7558-01
1
-10
5
-5
0
100010
Frequency (MHz)
Relative output (dB)
100
(Typ. Ta=25 °C, IF=50 mA ± 1 mAp-p)
-40 -20 0 20 40 60 80 100
-5
-4
-2
0
-3
-1
+1
+2
Ambient temperature (°C)
Relative radiant output (dB)
(Typ. IF=50 mA)
KLEDB0153EA
KLEDB0155EA
KLEDB0066EA
KLEDB0154EA
KLEDB0319EA
KLEDB0156EA
Infrared LED L7558 series
www.hamamatsu.com
Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2008 Hamamatsu Photonics K.K.
HAMAMATSU PHOTONICS K.K., Solid State Division
1126-1 Ichino-cho, Higashi-ku, Hamamatsu City, 435-8558 Japan, Telephone: (81) 53-434-3311, Fax: (81) 53-434-5184
U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P.O.Box 6910, Bridgewater, N.J. 08807-0910, U.S.A., Telephone: (1) 908-231-0960, Fax: (1) 908-231-1218
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49) 08152-3750, Fax: (49) 08152-2658
France: Hamamatsu Photonics France S.A.R.L.: 19, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: 33-(1) 69 53 71 00, Fax: 33-(1) 69 53 71 10
United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Hertfordshire AL7 1BW, United Kingdom, Telephone: (44) 1707-294888, Fax: (44) 1707-325777
North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171 41 Solna, Sweden, Telephone: (46) 8-509-031-00, Fax: (46) 8-509-031-01
Italy: Hamamatsu Photonics Italia S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39) 02-935-81-733, Fax: (39) 02-935-81-741
Cat. No. KLED1009E03 Jul. 2008 DN 3
Allowable forward current vs. ambient temperature
Allowable forward current vs. duty ratio
-40 -20 0 20
(Typ.)
40 60 80 100
0
40
60
80
100
Ambient temperature (°C)
Relative allowable forward current (%)
20
0.01
Duty ratio (%)
Allowable forward current (A)
0.01
0.1 1 10 100
0.1
1
10
Pulse width=1 µs
(Typ. Ta=25 °C)
100 µs
10 µs
KLEDB0027EB
KLEDA0009ED
KLEDA0052EB
KLEDB0157EB
Dimensional outlines (unit: mm)
L7558 L7558-01
1.12 ± 0.1
Clear epoxy resin
5.4 ± 0.1
4.2 ± 0.1
0.45
Lead
2.54 ± 0.2
2.3 ± 0.3
13.5
Common to case
4.65 ± 0.1
4.5 ± 0.2
6.65 ± 0.213.5
5.4 ± 0.2
2.54 ± 0.2
Common to case
0.45
Lead
