L8245

LED Infrared LED L8245 Peak emission wavelength: 1.65 µm L8245 is a long-wavelength infrared LED using an InGaAs chip. The peak emission occurs at a wavelength near the methane gas absorption band, making L8245 ideal for a light source for methane gas detection. Features Applications l Peak emission wavelength: 1.65 µm l High radiant output l Light source for methane gas detection s Absolute maximum ratings (Ta=25 °C, unless otherwise noted) Parameter Reverse voltage Forward current Forward current decrease rate Pulse forward current Pulse forward current decrease rate Power dissipation Operating temperature Storage temperature Symbol VR Max. IF IFP P Topr Tstg Condition Value 1 80 1.1 1.0 13 150 -30 to +85 -40 to +100 *1 Unit V mA mA/°C A mA/°C mW °C °C Pulse width=10 µs Duty ratio=1 % *1: Guaranteed to resist temperature cycle test of up to 5 cycles. s Electrical and optical characteristics (Ta=25 °C) Parameter Peak emission wavelength Spectral half width Radiant flux Forward voltage Reverse current Cut-off frequency Symbol λp ∆λ φe VF IR fc Condition IF=50 mA IF=50 mA IF=50 mA IF=50 mA VR=1 V IF=50 mA±10 mAp-p, *2 Min. 1.6 0.5 1 Typ. 1.65 130 0.8 1.0 3 Max. 1.7 1.5 10 Unit µm nm mW V µA MHz *2: Frequency at which the optical output decreases by -3 dB versus a reference output level at 100 kHz. L8245 may be damaged or performance may deteriorate due to static electricity, so use caution when handling. 1 Infrared LED s Emission spectrum 100 (Typ. Ta=25 ˚C, IF=50 mA) 20˚ 10˚ 0˚ 100 % L8245 s Directivity (Typ. Ta=25 ˚C) 10˚ 20˚ RELATIVE RADIANT OUTPUT (%) 80 30˚ 80 % 30˚ 60 40˚ 60 % 40˚ 40 50˚ 60˚ 70˚ 20 % 40 % 50˚ 60˚ 70˚ 80˚ 90˚ 20 0 1.2 80˚ 1.4 1.6 1.8 2.0 90˚ WAVELENGTH (µm) KLEDB0222EA RELATIVE RADIANT OUTPUT (%) KLEDB0223EA s Radiant output vs. ambient temperature +3 +2 +1 0 -1 -2 -3 -4 -5 -40 (Typ. IF=50 mA) s Allowable forward current vs. ambient temperature (Typ.) RELATIVE ALLOWABLE FORWARD CURRENT (%) 100 RELATIVE RADIANT OUTPUT (dB) 80 60 40 20 -20 0 20 40 60 80 100 0 -40 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE (˚C) KLEDB0224EA AMBIENT TEMPERATURE (˚C) KLEDB0027EB s Allowable forward current vs. duty ratio 10 (Typ. Ta=25 ˚C) s Dimensional outline (unit: mm) 5.4 ± 0.2 4.7 ± 0.1 GLASS WINDOW 3.0 ± 0.1 ALLOWABLE FORWARD CURRENT (A) PULSE WIDTH=1 µs 1 PULSE WIDTH=10 µs 0.1 0.45 LEAD 2.54 ± 0.2 0.01 0.01 0.1 1 10 100 DUTY RATIO (%) KLEDB0225EA COMMON TO CASE 13.5 PULSE WIDTH=100 µs 3.6 ± 0.2 KLEDA0071EA 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. ©2002 Hamamatsu Photonics K.K. 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: 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 2 Cat. No. KLED1034E01 Jan. 2002 DN