LED
Infrared LED
L7850 series
Peak emission wavelength: 1.45 碌m
L7850 series is a long wavelength LED using an InGaAs chip. Peak emission occurs at 1.45 碌m, making L7850 series ideal for detection of water
content or moisture. L7850-01 has a glass lens window for narrow directivity (beam spread).
Features
Applications
l
Peak emission wavelength: 1.45 碌m
l
High radiant output power
l
Narrow directivity (L7850-01)
l
Light source for moisture meter
l
Light source for photosensitive material
s
Absolute maximum ratings (Ta=25 擄C, unless otherwise noted)
Parameter
Reverse voltage
Forward current
Forward current derating
rate
Pulse forward current
Symbol
V
4
I
.
-
I
.2
Condition
Value
1
80
1.1
1.0
Unit
V
mA
mA/擄C
A
mA/擄C
mW
擄C
擄C
Ta > 25 擄C
Pulse width=10 碌s
Duty ratio=1 %
Pulse forward current
-
Ta > 25 擄C
13
derating rate
Power dissipation
P
150
Operating temperature
Topr
-30 to +85
Storage temperature
Tstg
-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 擄C)
L7850/-01
Min.
Typ.
Peak emission wavelength
I
.
=50 mA
1.4
1.45
lp
Spectral half width (FWHM)
I
.
=50 mA
-
100
Dl
Radiant flux
I
.
=50 mA
0.7
1.0
fe
Forward voltage
V
.
I
.
=50 mA
-
1.0
Pulse forward voltage
V
.2
I
.
=1 A
-
2
Reverse current
I
4
V
4
=1 V
-
-
Cut-off frequency *
fc
I
.
=50 mA 鹵 10 mAp-p
1
3
*2: Frequency at which the light output drops by -3 dB based on light output at 100 kHz.
Parameter
Symbol
Condition
Max.
1.5
150
-
1.5
3
10
-
Unit
碌m
nm
mW
V
V
碌A(chǔ)
MHz
L7850 series may be damaged or performance may deteriorate due to static electricity, so use caution when handling.
1
1
2
