L7850

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 Applications l Peak emission wavelength: 1.45 µm 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 °C, unless otherwise noted) Parameter Reverse voltage Forward current Forward current derating rate Pulse forward current Symbol V4 I. I.2 Condition Value 1 80 1.1 1.0 Unit V mA mA/°C A mA/°C mW °C °C Ta > 25 °C Pulse width=10 µs Duty ratio=1 % Pulse forward current Ta > 25 °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 °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 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. Parameter Symbol Condition Max. 1.5 150 1.5 3 10 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. 1 Infrared LED s Emission spectrum 100 L7850 series (Typ. Ta=25 ˚C, tw=100 µs, 0.1 %) s Radiant flux vs. forward current 100 s Forward current vs. forward voltage 1000 (Typ. Ta=25 ˚C, IF=50 mA) (Typ. Ta=25 ˚C, tw=100 µs, 0.1 %) RELATIVE RADIANT OUTPUT (%) 10 60 FORWARD CURRENT (mA) 100 1000 80 RADIANT FLUX (mW) 100 40 1 20 0 1.2 1.3 1.4 1.5 1.6 0.1 10 10 0.5 1.0 1.5 2.0 2.5 WAVELENGTH (µm) KLEDB0233EA FORWARD CURRENT (mA) KLEDB0234EA FORWARD VOLTAGE (V) KLEDB0235EA s Directivity (Typ. Ta=25 ˚C) 20˚ 10˚ 100 % 10˚ 20˚ s Radiant output vs. ambient temperature +3 s Allowable forward current vs. ambient temperature (Typ.) (Typ. IF=50 mA) RELATIVE ALLOWABLE FORWARD CURRENT (%) RELATIVE RADIANT OUTPUT (dB) 30˚ 80 % L7850 L7850-01 30˚ +2 +1 0 -1 -2 -3 -4 -5 -40 100 80 40˚ 60 % 40˚ 60 50˚ 60˚ 70˚ 80˚ 90˚ 40 % 20 % 50˚ 60˚ 70˚ 80˚ 90˚ 40 20 -20 0 20 40 60 80 100 0 -40 -20 0 20 40 60 80 100 RELATIVE RADIANT OUTPUT (%) KLEDB0236EA AMBIENT TEMPERATURE (˚C) KLEDB0237EA AMBIENT TEMPERATURE (˚C) KLEDB0027EB s Allowable forward current vs. duty ratio 10 (Typ. Ta=25 ˚C) s Dimensional outlines (unit: mm) L7850 5.4 ± 0.2 4.7 ± 0.1 GLASS WINDOW 3.0 ± 0.1 3.6 ± 0.2 L7850-01 5.4 ± 0.2 4.65 ± 0.1 ALLOWABLE FORWARD CURRENT (A) PULSE WIDTH=1 µs 1 PULSE WIDTH=10 µs PULSE WIDTH=100 µs 0.1 4.5 ± 0.2 13.5 0.01 0.01 0.45 LEAD 0.1 1 10 100 0.45 LEAD 2.54 ± 0.2 DUTY RATIO (%) KLEDB0225EA 2.54 ± 0.2 COMMON TO CASE COMMON TO CASE KLEDA0071EB 13.5 KLEDA0074EA 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. 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 5.85 ± 0.2 Cat. No. KLED1036E01 Dec. 2001 DN