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L9437

Hamamatsu Corporation
Part Number L9437
Manufacturer Hamamatsu Corporation
Description Infrared LED LED emitting collimated light
Published Mar 17, 2010
Detailed Description LED www.DataSheet4U.com Infrared LED L9437 LED emitting collimated light for optical encoder L9437 is an infrared LED...
Datasheet PDF File L9437 PDF File

L9437
L9437

Overview
LED www.
DataSheet4U.
com Infrared LED L9437 LED emitting collimated light for optical encoder L9437 is an infrared LED developed for optical encoders.
By improving the aspherical lens used with the previous type L8506, we have achieved an even more highly collimated beam of near infrared light.
The lead pin of L9437 has no step piece that is usually formed at the lead base brazed to the package, thus eliminating the restriction in printed circuit board design.
Features Applications l Collimated light beam l Uniform light spot l Narrow directivity: ±5˚ l High-speed response: 40 MHz Typ.
l High reliability l Optical encoder s Absolute maximum ratings (Ta=25 °C, unless otherwise noted) Parameter Reverse voltage Forward current Forward current reduction rate Pulse forward current P ulse forw ard current reduction ra te Power dissipation Operating temperature Storage temperature Symbol VR IF IFP P Topr Tstg Condition Value 5 80 0.
67 0.
5 4.
2 150 -30 to +85 -40 to +100 Unit V mA mA/°C A mA/°C mW °C °C Pulse width=10 µs Duty ratio=1 % s Electrical and optical characteristics (Ta=25 °C) Parameter Symbol Condition Min.
Typ.
Max.
Unit Peak emission wavelength IF=30 mA 840 870 900 nm λp Spectral half width IF=30 mA 45 nm ∆λ Optical output *1 Pe IF=30 mA 1.
25 1.
6 mW Forward voltage VF IF=30 mA 1.
5 1.
65 V Reverse current IR VR=5 V 5 µA Light spot size *2 Bw IF=30 mA 4.
0 *3 4.
3 mm 4 Cut-off frequency * fc IF=30 mA ± 4 mAp-p 25 40 MHz *1: Measured with a photodiode (active area: φ8 mm) installed 25 mm away from LED stem undersurface.
*2: Full width at half maximum of beam spot measured with an image sensor installed 13 mm away from LED stem undersurface.
*3: Reference value *4: Frequency at which the optical output drops by -3 dB from that at 100 kHz.
1 Infrared LED s Emission spectrum 100 (Typ.
Ta=25 ˚C, IF=30 mA) L9437 (Typ.
Ta=25 ˚C) www.
DataSheet4U.
com s Optical output vs.
forward current (Typ.
Ta=25 ˚C) 4.
0 3.
5 3.
0 2.
5 2.
0 1.
5 1.
0 0.
5 s Forward current vs.
forwa...


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