50 m ingaas apd coaxial module for 2.5 gb/s fiber optic communications nr8501 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 = 2.5 ghz at m = 5 coaxial module with single mode fiber (smf) or gi-50 fiber with sc connector: standard, fc connector: option (refer to ordering information) the nr8501 series are ingaas avalanche photo diode (apd) coaxial modules with single mode fiber. they are designed for long wavelength 2.5 gb/s optical communication systems and are ideal as a reciever for synchronous digital hierarchy (sdh) system, stm-16 itu-t recommendations. description california eastern laboratories part number nr8501 series symbols parameters and conditions units min typ max v br reverse breakdown voltage, i d =100 a v 40 60 80 1 temperature coefficient of reverse breakdown voltage %/? 0.20 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 = 5 ghz 2.5 3.0 m = 10 2.5 3.0 m = 30 1.0 1.2 s responsivity, = 1310 nm, m = 1 a/w 0.80 0.94 = 1550 nm, m = 1 0.81 0.96 m multiplication factor, = 1310 nm, i po = 1.0 a3040 v r = v (@i d = 1 a) x excess noise exponent, = 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 notes: 2. f = m x electro-optical characteristics (t c = 25 c, unless otherwise specified) v br (25 c+ ? t c)-v br (25 c) ? t c ? v br (25 c) 1. =
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) note: 1. operation in excess of any one of these parameters may result in permanent damage. nr8501series wavelength dependence of quantum efficiency terminal capacitance c t (pf) reverse voltage, v r (v) quantum efficiency, (%) wavelength, ( m) terminal capacitance vs. reverse voltage 100 80 60 40 20 0 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1 2 5 10 20 50 100 2 5 10 20 50 100 typical performance curves (t c = 25 c, unless otherwise specified) 0.1 1 10 10 1 100 excess noise factor f excess noise factor vs. multiplication factor multiplication factor m
nr8501series dark current,i d, i ph (na) dark current and photo current vs. reverse voltage reverse voltage, v r (v) 1 10 10 -12 10 -11 10 -10 10 -9 10 -8 10 -7 10 -6 10 -5 10 -4 10 2 0204060 80 = 1310 nm, i po = 1.0 a i ph i d 0 10 -12 10 -11 10 -10 10 -9 10 -8 10 -7 10 -6 10 -5 20 40 60 80 t c = 100 c +80 c +60 c +40 c +20 c -20 c 0 c 1 2 5 10 20 50 100 2 5 10 20 50 100 1310 nm ( ), 1550 nm ( o ) f = 35 mhz, b=1 mhz 0.5 0.4 k dark current, i d (na) dark current vs. reverse voltage reverse voltage, v r (v) excess noise factor f excess noise factor vs. multiplication factor multiplication factor m typical performance curves (t c = 25 c, unless otherwise specified)
nr8501series 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 parameter specification units 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 part number flange type fiber type available connector nr8501bp-bc flat mount flange smf with fc-upc connector nr8501bp-cc with sc-upc connector NR8501BR-BB gi-50 fiber with fc-upc connector nr8501br-cb with sc-upc connector nr8501cp-bc vertical mount smf with fc-upc connector nr8501cp-cc flange with sc-upc connector nr8501cr-bb gi-50 fiber with fc-upc connector nr8501cr-cb with sc-upc connector ordering information outline dimensions (units in 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 nr8501bp/br nr8501cp/cr pin connections 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 2 3 1 6.0 18.51.0 3.70.3 1. anode (negative) 2. cathode (positive) 3. case pin connections
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