Features
l
High radiant output power
l
High reliability
Applications
l
Optical switches
l
Automatic control systems
l
Auto-focus
LED
Infrared LED
TO-46 style GaAs infrared LED
L2388 series
■ Absolute maximum ratings (Ta=25 °C)
Parameter Symbol Condition Value Unit
Forward current IF80 mA
Reverse voltage VR5 V
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
* L2388 is guaranteed to resist temperature cycle test of up to 5 cycles.
■ Electrical and optical characteristics (Ta=25 °C)
L2388 L2388-01
Parameter Symbol Condition Min. Typ. Max. Min. Typ. Max. Unit
Peak emission
wavelength λpIF=50 mA 920 945 970 920 945 970 nm
Spectral half width ∆λ IF=50 mA -45 - - 45 -nm
Forward voltage VFIF=50 mA - 1.3 1.4 - 1.3 1.4 V
Pulse forward voltage VFP IF=1.0 A -2.3 2.9 -2.3 2.9 V
Reverse current IRVR=5 V - - 5 - - 5 µA
Radiant flux φeIF=50 mA 4.5 6.0 -2.6 3.4 -mW
Radiant illuminance PEIF=50 mA - 0.6 - - 1.4 - mW/cm2
Rise time tr IF=50 mA, 10 to 90 % -1.2 2.0 -1.2 2.0 µs
Fall time tf IF=50 mA, 90 to 10 % - 1.3 2.0 - 1.3 2.0 µs
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, http://www.hamamatsu.com
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
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. ©2001 Hamamatsu Photonics K.K.
Infrared LED
L2388 series
Cat. No. KLED1012E01
Apr. 2001 DN
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
800
0
20
40
60
80
100
WAVELENGTH (nm)
RELATIVE RADIANT OUTPUT (%)
(Typ. Ta=25 ˚C, IF=50 mA)
900 11001000
FORWARD VOLTAGE
(V)
(Typ. Ta=25 ˚C, tw=100 µs, 0.1 %)
FORWARD CURRENT
(mA)
1.51.0
1
10
1000
100
2.0 2.5
FORWARD CURRENT (mA)
(Typ. Ta=25 ˚C, tw=100 µs, 0.1 %)
RADIANT FLUX (mW)
101
0.1
1
1000
100
10
100 1000
L2388-01
L2388
AMBIENT TEMPERATURE (˚C)
(Typ. IF=50 mA)
RELATIVE RADIANT OUTPUT (dB)
0-20-40
-5
-4
-2
-3
-1
+3
+2
+1
0
20 40 60 80 100
RELATIVE RADIANT OUTPUT (%)
(Typ. Ta=25 ˚C)
80
%
40
%
60
%
20
%
20˚10˚0˚10˚20˚
90˚
80˚
50˚
40˚
30˚
70˚
60˚
90˚
80˚
50˚
40˚
30˚
70˚
60˚
L2388-01
L2388
100 %
-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
(Typ.
Ta=25
˚C)
PULSE WIDTH=
100 µs
PULSE WIDTH=
10 µs
■ Dimensional outlines (unit: mm)
KLEDA0009ED KLEDA0052EB
■ Emission spectrum ■ Radiant flux vs. forward current
■ Radiant output vs. ambient
temperature
■ Directivity
KLEDB0209EA
KLEDB0123EA
KLEDB0210EA
KLEDB0122EA
■ Forward current vs. forward voltage
KLEDB0211EA
■ Allowable forward current vs.
ambient temperature
KLEDB0027EB
➀ L2388 ➁ L2388-01
■ Allowable forward current
vs. duty ratio
KLEDB0038EA
