nr8500 series features ? small dark current: i d = 7 na ? high sensitivity: s = 0.94 a/w at = 1310 nm, m = 1 s = 0.96 a/w at = 1550 nm, m = 1 ? high speed response: f c = 1.5 ghz at m = 10 ? coaxial module with smf or gi-50 fiber ? with sc connector: standard fc connector: option nec's nr8500 series is an ingaas avalanche photo diode (apd) coaxial module with optical fiber pigtail. this module is designed for long wavelength optical communication systems and is ideal as a reciever for synchronous digital hierarchy (sdh) system, stm-4 and stm-1, itu-t recommendations. description part number nr8500 series symbols parameters and conditions units min typ max v br reverse breakdown voltage, i d =100 av50 70 90 1 temperature coefficient of reverse breakdown voltage %/oc 0.2 i d dark current, v r = v br x 0.9 na 7 30 i dm multiplied dark current, m = 2 to 10 na 1 5 c t terminal capacitance, v r = v (br)r x 0.9, f = 1 mhz pf 0.5 0.75 f c cut-off frequency, m = 10 ghz 1.0 1.5 m = 20 1.2 s sensitivity, = 1310 nm a/w 0.8 0.94 = 1550 nm 0.81 0.96 m multiplication factor, = 1310 nm, i po = 1.0 a3040 v r = v (@i d = 1 a) x excess noise factor 2 , = 1310 nm, 1550 nm, 0.7 i po =1.0 a, m = 10, f = 35 mhz, b = 1 mhz f excess noise factor 2 , = 1310 nm, 1550 nm, 5 i po =1.0 a, m = 10, f = 35 mhz, b = 1 mhz orl optical return loss smf db 30 gi-50 fiber 28 note: 2. f = m x electro-optical characteristics (t c = 25 c, unless otherwise specified) california eastern laboratories v br (25 c+ ? t c)-v br (25c) ? t c ? v br (25c) 1. = nec's 50 m ingaas apd in coaxial package for 155 mb/s and 622 mb/s applications
dark current, i d (a) dark current vs. reverse voltage absolute maximum ratings 1 (t c = 25 c, unless otherwise specified) symbols parameters units ratings i f forward current ma 10 i r reverse current ma 1.0 t c operating case temp. c -40 to +85 t stg storage temperature c -40 to +85 t sld lead soldering temperature c 260 (10 sec.) rh relative humidity % 85 (noncondensing) wavelength dependence of quantum efficiency sensitivity (relative value), ? s/s (%) operating case temperature, t c ( c) reverse voltage, v r (v) dark current, photo current, i d , lph (a) dark current and photo current vs. reverse voltage quantum efficiency, (%) wavelength, ( m) typical performance curves (t c = 25 c, unless otherwise specified) temperature dependence of sensitivity note: 1. operation in excess of any one of these parameters may result in permanent damage. nr8500 series 100 80 60 40 20 0 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 = 1310 nm -60 -40 -20 0 20 40 60 80 100 -10 0 10 10 -4 10 -5 10 -6 10 -7 10 -8 10 -9 10 -10 020 80 60 40 100 i d lph = 1310 nm i po = 1.0 a t c = 25 c reverse voltage, v r (v) 10 -6 10 -7 10 -8 10 -9 10 -10 0204 06080100 t c = 85 c t c = 65 c t c = 25 c t c = -20 c
nr8500 series multiplication factor vs. reverse voltage multiplication factor, m reverse voltage, v r (v) 10 3 t c = 85 c t c = 25 c t c = 65 c t c = -20 c 10 2 10 1 10 0 0204 0608 0 100 temperature dependence of dark current and multiplied dark current dark current, multiplied dark current i d , i dm (a) frequency, f (ghz) = 1310 nm id @ v r = 0.9 v (br)r i dm 10 -6 10 -7 10 -8 10 -9 10 -10 10 -11 -60 -40 -20 0 20 40 60 80 100 typical performance curves (t c = 25 c, unless otherwise specified) = 1310 nm r l = 50 ? m = 8 0 1.0 2.0 3.0 4.0 5.0 110100 10 1 0.1 2 1 0.5 0.2 0.1 12 5102 050 100 0.5 0.4 1310 nm ( ), 1550 nm ( ) f = 35 mhz, b = 1 mhz 100 50 20 10 5 2 1 100 50 20 10 5 2 1 frequency response response, (3 db/div.) cut-off frequency vs. multiplication factor cut-off frequency, f c (ghz) terminal capacitance vs. reverse voltage terminal capacitance, c t (pf) excess noise factor vs. multiplication factor excess noise factor, f multiplication factor, m multiplication factor, m reverse voltage, v r (v) operating case temperature, t c (oc)
nr8500 series outline dimensions (units in mm) 352 mm fiber length: 1000 mm min connector 8.990.5 mm 52 mm 12.70.2 17.00.2 ?2.2 ?0.9 ?3.20.2 ?7.00.2 ?5.00.2 1.20.2 4.00.2 10.51.0 14.01.0 3.70.3 1.00.1 p.c.d. = ?2.0 7.20.3 24.71.0 4.00.5 3.2 3 2 1 1 3 2 ?0.450.05 2.2 3.50.5 optical fiber length: 1 m min fp/fr cp/cr part number flange type fiber type available connector nr8500fp-bc flat mount flange smf with fc-upc connector nr8500fp-cc with sc-upc connector nr8500fr-bb gi-50 fiber with fc-spc connector nr8500fr-cb with sc-spc connector nr8500cp-bc vertical mount smf with fc-upc connector nr8500cp-cc flange with sc-upc connector nr8500cr-bb gi-50 fiber with fc-spc connector NR8500CR-CB with sc-spc connector a business partner of nec com p ound semiconductor devices, ltd . 02/27/2003 life support applications these nec products are not intended for use in life support devices, appliances, or systems where the malfunction of these prod ucts can reasonably be expected to result in personal injury. the customers of cel using or selling these products for use in such applications do so at their own risk and agree to fully indemnify cel for all damages resulting from such improper use or sale. ordering information 16.00.2 0.5 ?0.450.05 ?0.9 optical fiber length: 1 m min ?7.00.2 8.00.3 0.50.2 6.0 15.0 25.31.0 4.3 p.c.d. = ?2.0 4Cr1.250.2 2C?2.5 8.50.2 1 2 3 12.00.15 7.00.2 14.01 .0 2 3 1 1. anode (negative) 2. cathode (positive) 3. case 1. anode (negative) 2. cathode (positive) 3. case optical fiber characteristics parameter units specification smf gi-50 mode field diameter m 9.5 1C core diameter mC 50 3 cladding diameter m 125 2 125 2 maximum cladding noncircularity % 2 2 maximum core/cladding concentricity % 1.6 4.0 outer diameter mm 0.9 0.1 0.9 0.1 cut-off wavelength nm 1100 to 1270 C minimum fiber bending radius mm 30 30 fiber length mm 1000 min 1000 min flammability ul1581 vw-1
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