L7850 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – Peak emission wavelength: 1.45 μm

LED
Infrared LED
L7850 series
Peak emission wavelength: 1.45 µm
L7850 series is a long wavelength LED using an InGaAs chip. Peak emission occurs at 1.45 µm, making L7850 series ideal for detection of water
content or moisture. L7850-01 has a glass lens window for narrow directivity (beam spread).
Features
l Peak emission wavelength: 1.45 µm
l High radiant output power
l Narrow directivity (L7850-01)
Applications
l Light source for moisture meter
l Light source for photosensitive material
s Absolute maximum ratings (Ta=25 °C, unless otherwise noted)
Parameter
Symbol
Condition
Value
Reverse voltage
V4
1
Forward current
I.
80
Forward current derating
rate
- Ta > 25 °C
1.1
Pulse forward current
I.2
Pulse width=10 µs
Duty ratio=1 %
1.0
Pulse forward current
derating rate
- Ta > 25 °C
13
Power dissipation
P
150
Operating temperature
Storage temperature
Topr
Tstg
-30 to +85
-40 to +100 *
*1: L7850 series is guaranteed to resist temperature cycle test of up to 5 cycles.
s Electrical and optical characteristics (Ta=25 °C)
Parameter
Symbol
Condition
L7850/-01
Min.
Typ.
Peak emission wavelength lp I.=50 mA
1.4
1.45
Spectral half width (FWHM) Dl I.=50 mA
-
100
Radiant flux
fe I.=50 mA
0.7
1.0
Forward voltage
V. I.=50 mA
-
1.0
Pulse forward voltage
V.2 I.=1 A
-
2
Reverse current
I4 V4=1 V
-
-
Cut-off frequency *
fc I.=50 mA ± 10 mAp-p
1
3
*2: Frequency at which the light output drops by -3 dB based on light output at 100 kHz.
Max.
1.5
150
-
1.5
3
10
-
Unit
V
mA
mA/°C
A
mA/°C
mW
°C
°C
Unit
µm
nm
mW
V
V
µA
MHz
L7850 series may be damaged or performance may deteriorate due to static electricity, so use caution when handling.
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