50 m ingaas apd coaxial module for 622 mb/s, 156 mb/s fiber optic communications 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 single mode fiber (smf) or gi-50 fiber with sc connector: standard, fc connector: option (refer to ordering information) the nr8500 series are ingaas avalanche photo diode (apd) coaxial modules with single mode fiber. they are designed for long wavelength optical communication systems and are 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 a v 50 70 100 1 temperature coefficient of reverse breakdown voltage %/? 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 1.5 m = 20 1.2 s responsivity, = 1300 nm a/w 0.8 0.94 = 1550 nm 0.81 0.96 m multiplication factor, = 1300 nm, i po = 1.0 a3040 v r = v (@i d = 1 a) x excess noise exponent, = 1300 nm, 1550 nm, 0.7 i po =1.0 a, m = 10, f = 35 mhz, b = 1 mhz f excess noise factor 2 , = 1300 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 (25 c) ? t c ? v br (25 c) 1. =
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 0.5 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 responsivity (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 responsivity 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 = 1300 nm -60 -40 -20 0 20 40 60 80 100 -10 0 10 10 -3 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 0 20406080100 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 0 20406080100 temperature dependence of dark current and multiplied dark current dark current, multiplied dark current i d , i dm (a) frequency, f (ghz) = 1300 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) = 1300 nm r l = 50 ? m = 8 t c = 25 c 0 1.0 2.0 3.0 4.0 5.0 t c = 25 c 1 10 100 10 1 0.1 2 1 0.5 0.2 0.1 1 2 5 10 20 50 100 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 ( c)
nr8500 series outline dimensions (units in mm) part number flange type fiber type available connector nr8500bp-bc flat mount flange smf with fc-upc connector nr8500bp-cc with sc-upc connector nr8500br-bb gi-50 fiber with fc-upc connector nr8500br-cb with sc-upc connector nr8500cp-bc vertical mount smf with fc-upc connector nr8500cp-cc flange with sc-upc connector NR8500CR-BB gi-50 fiber with fc-upc connector nr8500cr-cb with sc-upc connector exclusive north american agent for rf, microwave & optoelectronic semiconductors california eastern laboratories ?headquarters ?4590 patrick henry drive ?santa clara, ca 95054-1817 ?(408) 988-3500 ?telex 34-6393 ?fax (408) 988-0279 24-hour fax-on-demand: 800-390-3232 (u.s. and canada only) ?internet: http://www.cel.com 06/19/2001 data su bject to change without notice 352 mm fiber length: 1000 mm min. connector 8.990.5 mm 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 4 r1.250.2 2 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 nr8500cp/cr nr8500bp/br pin connections ordering information parameter specification unit smf gi-50 fiber mode field diameter 9.5 1 ? m core diameter - 50 3 m cladding diameter 125 2 125 2 m maximum cladding noncircularity 2 2 % maximum core/cladding concentricity 1.6 4.0 % outer diameter 0.9 0.1 0.9 0.1 mm cut-off wavelength 1100 to 1270 - nm minimum fiber bending radius 30 30 mm fiber length 1000 min 1000 min mm flammability ul1581 vw-1 optical fiber characteristics 1.20.2 4.00.2 2.2 3.2 24.51.0 8.00.3 7.00.2 0.9 14.01.0 optical fiber length: 1 m min with sc connector 1.00.1 p. c . d . 2.0 2.2 7.20.3 0.450.04 17.00.2 12.70.2 6.0 18.51.0 3.70.3 2 3 1 1. anode (negative) 2. cathode (positive) 3. case pin connections
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