LED Infrared LED L7850 series Peak emission wavelength: 1.45 m L7850 series is a long wavelength LED using an InGaAs chip. Peak emission occurs at 1.45 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 m l High radiant output power l Narrow directivity (L7850-01) l Light source for moisture meter l Light source for photosensitive material 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 Unit V mA Ta > 25 C 1.1 mA/C Pulse width=10 s Duty ratio=1 % 1.0 A 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. mA/C mW C C 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 m nm mW V V A MHz L7850 series may be damaged or performance may deteriorate due to static electricity, so use caution when handling. 1 Infrared LED Radiant flux vs. forward current Emission spectrum (Typ. Ta=25 C, IF=50 mA) Forward current vs. forward voltage (Typ. Ta=25 C, tw=100 s, 0.1 %) 100 40 FORWARD CURRENT (mA) RADIANT FLUX (mW) 80 60 10 1 20 1.3 1.4 1.5 0.1 10 1.6 100 WAVELENGTH (m) 20 RELATIVE RADIANT OUTPUT (dB) L7850 L7850-01 40 50 60 % 40 50 40 % 60 60 20 % 70 70 80 80 90 90 KLEDB0235EA Allowable forward current vs. ambient temperature (Typ.) +2 +1 0 -1 -2 -3 -4 -5 -40 RELATIVE RADIANT OUTPUT (%) -20 0 20 40 60 80 100 AMBIENT TEMPERATURE (C) KLEDB0236EA 80 60 40 20 0 -40 -20 0 20 40 60 KLEDB0027EB L7850-01 5.4 0.2 4.65 0.1 PULSE WIDTH=10 s 4.5 0.2 3.6 0.2 5.4 0.2 4.7 0.1 GLASS WINDOW 3.0 0.1 1 PULSE WIDTH=100 s 0.45 LEAD 1 10 13.5 0.1 0.1 100 AMBIENT TEMPERATURE (C) L7850 (Typ. Ta=25 C) PULSE WIDTH=1 s 0.01 0.01 80 KLEDB0237EA 13.5 ALLOWABLE FORWARD CURRENT (A) 100 Dimensional outlines (unit: mm) Allowable forward current vs. duty ratio 10 2.5 (Typ. IF=50 mA) +3 30 80 % 2.0 FORWARD VOLTAGE (V) 100 % 30 1.5 KLEDB0234EA Radiant output vs. ambient temperature (Typ. Ta=25 C) 10 1.0 FORWARD CURRENT (mA) Directivity 10 10 0.5 1000 KLEDB0233EA 20 100 5.85 0.2 0 1.2 (Typ. Ta=25 C, tw=100 s, 0.1 %) 1000 RELATIVE ALLOWABLE FORWARD CURRENT (%) RELATIVE RADIANT OUTPUT (%) 100 L7850 series 0.45 LEAD 100 2.54 0.2 2.54 0.2 DUTY RATIO (%) KLEDB0225EA COMMON TO CASE COMMON TO CASE KLEDA0071EB 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. (c)2001 Hamamatsu Photonics K.K. HAMAMATSU PHOTONICS K.K., Solid State Division 1126-1 Ichino-cho, Higashi-ku, Hamamatsu City, 435-8558 Japan, Telephone: (81) 53-434-3311, Fax: (81) 53-434-5184, 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.: 19, 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: Smidesvagen 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. KLED1036E01 Dec. 2001 DN