Features
l Peak emission wavelength: 1.3 m
l High radiant output power
Applications
l Reference light source for moisture meter
l Light source for photosensitive material
L E D
Infrared LED
Peak emission wavelength: 1.3 m
L7866
L7866 is a long wavelength LED using an InGaAs chip. Peak emission occurs at 1.3 m, making L7866 ideal for reference light sources when
detecting water content or moisture.
1
s
Absolute maximum ratings (Ta=25 C, unless otherwise noted)
Parameter
Symbol
Condition
Value
Unit
Reverse voltage
V
4
1
V
Forward current
I
.
80
mA
Forward current derating rate
-Ta > 25 C
1.1
mA/C
Pulse forward current
I
.2
Pulse width=10 s
Duty ratio=1 %
1.0
A
Pulse forward current
derating rate
-Ta > 25 C
13
mA/C
Power dissipation
P
150
mW
Operating temperature
Topr
-30 to +85
C
Storage temperature
Tstg
-40 to +100 *
C
*1: L7866 is guaranteed to resist temperature cycle test of up to 5 cycles.
s
Electrical and optical characteristics (Ta=25 C)
Parameter
Symbol
Condition
Min.
Typ.
Max.
Unit
Peak emission wavelength
lp
I
.
=50 mA
1.25
1.3
1.35
m
Spectral half width (FWHM)
Dl
I
.
=50 mA
-
100
150
nm
Radiant flux
fe
I
.
=50 mA
0.7
1.0
-mW
Forward voltage
V
.
I
.
=50 mA
-
1.0
1.5
V
Pulse forward voltage
V
.2
I
.
=1 A
-2
3
V
Reverse current
I
4
V
4
=1 V
-
-
10
A
Cut-off frequency *
fc
I
.
=50 mA 10 mAp-p
1
3
-
MHz
*2: Frequency at which the light output drops by -3 dB based on light output at 100 kHz.
L7866 may be damaged or performance may deteriorate due to static electricity, so use caution when handling.
Infrared LED
L7866
HAMAMATSU PHOTONICS K.K., Solid State Division
1126-1 Ichino-cho, Hamamatsu City, 435-8558 Japan, Telephone: (81) 053-434-3311, Fax: (81) 053-434-5184, 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.: 8, 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: Smidesvgen 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.
Cat. No. KLED1037E01
Dec. 2001 DN
5.4 0.2
4.7 0.1
GLASS WINDOW
3.0 0.1
3.6 0.2
13.5
2.54 0.2
0.45
LEAD
COMMON TO CASE
s Radiant flux vs. forward current
s Directivity
s Radiant output vs. ambient
temperature
KLEDB0239EA
KLEDB0234EA
s Emission spectrum
2
10
100
1000
100
1
10
0.1
(Typ. Ta=25 C, tw=100 s, 0.1 %)
FORWARD CURRENT (mA)
RADIANT FLUX (mW)
s Forward current vs. forward voltage
0.5
1.5
2.5
1.0
2.0
1000
100
10
(Typ. Ta=25 C, tw=100 s, 0.1 %)
FORWARD VOLTAGE (V)
FORWARD CURRENT (mA)
KLEDB0235EA
KLEDB0240EA
KLEDB0241EB
KLEDB0027EB
s Allowable forward current vs.
ambient temperature
s Allowable forward current vs.
duty ratio
s Dimensional outline (unit: mm)
KLEDB0225EA
KLEDA0071EB
RELATIVE RADIANT OUTPUT (%)
(Typ. Ta=25 C)
80 %
40 %
60 %
20 %
20
10
10
20
90
80
50
40
30
70
60
90
80
50
40
30
70
60
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
PULSE WIDTH=1 s
(Typ. Ta=25 C)
PULSE WIDTH=100 s
PULSE WIDTH=10 s
1
1.1
1.3
1.2
1.4
1.5
1.6
100
60
20
80
40
0
(Typ. Ta=25 C, I
F
=50 mA)
WAVELENGTH (
m)
RELATIVE RADIANT OUTPUT (%)
(Typ. I
F
=50 mA)
-40
-20
40
100
0
20
60
80
+3
-1
+2
-2
+1
0
-3
-4
-5
AMBIENT TEMPERATURE (C)
RELATIVE RADIANT OUTPUT (dB)
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