vitesse semiconductor corporation advance product information vsc7709 1.25gb/s photodetector/transimpedance amplifier for optical communication g52362-0, rev 2.1 page 1 04/02/01 ? vitesse semiconductor corporation ? 741 calle plano camarillo, ca 93012 tel: (800) vitesse fax: (805) 987-5896 email: prodinfo@vitesse.com internet: www.vitesse.com features applications general description the vsc7709 integrated pin photodetector/transimpedance amplifier provides a highly integrated solu- tion for converting 1300 nm light from a fiber optic communications channel into a differential output voltage. the benefits of vitesse semiconductor?s gallium arsenide h-gaas process are fully utilized to provide a very high bandwidth and low noise amplifier. the pin detector is 75 m in diameter. the detector bias is supplied internally eliminating the need for a separate bias connection. the sensitivity, duty cycle distortion and jitter meet or exceed all fibre channel and gigabit ethernet application requirements. the vsc7709 is available in flat-windowed or lensed packages. the transimpedance amplifier is also available in bare die form. the use of a photodetector and transimpedance amplifier hybrid, reduces the input capacitance, resulting in higher sensitivity and bandwidth and improved speed of response. these parts can easily be used in developing fibre channel and gigabit ethernet electro-optic receivers for the 900nm-1600nm spectral range which exhibit very high performance and ease of use. block diagram high bandwidth: 1100mhz low input noise equivalent power: 0.5mw single 3.3v supply 1.25gb/s data rate 75mm optically active area (pin diode) integrated agc package: to-46, to-56, bare die +3.3v d0 d1 gigabit ethernet optical receivers fibre channel optical receivers atm optical receivers system interconnect sonet/sdh
vitesse semiconductor corporation advance product information vsc7709 1.25gb/s photodetector/transimpedance amplifier for optical communication page 2 g52362-0, rev 2.1 04/02/01 ? vitesse semiconductor corporation 741 calle plano camarillo, ca 93012 tel: (800) vitesse fax: (805) 987-5896 email: prodinfo@vitesse.com internet: www.vitesse.com electrical characteristics table 1: electro-optic specifications notes: (1) applicable to packaged parts with assembled 1300nm photodetector with responsivity = 0.8a/w. (2) applicable to bare dice. (3) by characterization. see measurements and application section. absolute maximum ratings (1) power supply voltage (v dd )........................................................................................................................... +6v maximum junction temperature range...................................................................................... -55 c to +125 c storage temperature range...................................................................................................... ... -55 c to +125 c incident optical power (p inc ) .................................................................................................................... +3dbm note: (1) caution: stresses listed under ?absolute maximum ratings? may be applied to devices one at a time without caus- ing permanent damage. functionality at or above the values listed is not implied. exposure to these values for extended periods may affect device reliability. recommended operating conditions positive voltage rail (v dd ).................................................................................................................. 3.0 to 3.6v negative voltage rail (gnd).................................................................................................... ........................ 0v operating temperature range (t a ) ...........................................................................0 c ambient to +85 c case symbol parameter min typ max units conditions wavelength 1270 1355 nm v dd power supply voltage 3.0 3.6 v i s power supply current 30 ma psrr power supply rejection ratio tbd db f = 0.3mhz to 40mhz. hybrid differential with external filter. bw optical modulation bandwidth 1000 mhz see measurements and applications section f c low frequency cutoff 2 mhz see measurements and applications section r d differential responsivity 2.5 mv/ w t z differential transimpedance 2000 ? r l = 100 ? (1) r o single-ended output impedance 25 ? r l = 100 ? (2) v n output noise voltage 1.2 mv rms bw = 800mhz, p = 0mw nep o input noise equivalent optical power 0.5 w rms bw = 800mhz, p = 0mw s sensitivity -26 dbm ber 10 -12 , b = 1250mb/s (3) ? v bias offset voltage 200 mv p = -3dbm v d differential output voltage 0.25 v p = -3dbm, r = 100 ? pdj pattern dependent jitter 60 ps p = -3dbm, 10% voltage window dcd duty cycle distortion 5 % p = -3dbm t r /t f rise and fall times 400 ps 20% to 80%, p = -3dbm
vitesse semiconductor corporation advance product information vsc7709 1.25gb/s photodetector/transimpedance amplifier for optical communication g52362-0, rev 2.1 page 3 04/02/01 ? vitesse semiconductor corporation 741 calle plano camarillo, ca 93012 tel: (800) vitesse fax: (805) 987-5896 email: prodinfo@vitesse.com internet: www.vitesse.com package descriptions figure 1: pin diagram table 2: pin identification for to-46 (ball lens) and bare die symbol description d + out data output normal (with reference to incident light) d ? out data output complement (inverting, with reference to incident light) vdd power supply gnd ground (package case) vss doutn doutp gnd to package bottomview
vitesse semiconductor corporation advance product information vsc7709 1.25gb/s photodetector/transimpedance amplifier for optical communication page 4 g52362-0, rev 2.1 04/02/01 ? vitesse semiconductor corporation 741 calle plano camarillo, ca 93012 tel: (800) vitesse fax: (805) 987-5896 email: prodinfo@vitesse.com internet: www.vitesse.com figure 2: pad assignments pad 3 clop pad 2 vgnd pad 10 anode minus pad 1 vgnd pad 6 vdd pad 9 anode minus pad 8 cathode plus pad 5 vgnd pad 4 clon bond pad die size: 861 m x 1798 m (33.9mil x 70.8mil) actual die size: 961 m x 1898 m (37.8mil x 74.7mil) die thickness: 254 m (10mil) pad size (a): 110 m x 110 m (4.3mil x 4.3mil) pad passivation opening (a): 86 m x 86 m (3.3mil x 3.3mil) 1798 m (70.8mil) 1898 m (74.7mil) 961 m (37.8mil) 861 m (33.9mil) pad size (b): 220 m x 110 m (8.6mil x 4.3mil) pad passivation opening (b): 196 m x 86 m (7.7mil x 3.3mil) (a) (a) (a) (a) (a) (a) (b) (b) (a)
vitesse semiconductor corporation advance product information vsc7709 1.25gb/s photodetector/transimpedance amplifier for optical communication g52362-0, rev 2.1 page 5 04/02/01 ? vitesse semiconductor corporation 741 calle plano camarillo, ca 93012 tel: (800) vitesse fax: (805) 987-5896 email: prodinfo@vitesse.com internet: www.vitesse.com table 3: pad coordinates signal name pad number coordinates (m) description x y vgnd 1 110.00 55.00 ground vgnd 2 55.00 1582.40 ground clop 3 55.00 1742.70 data output, true (with reference to incident light) clon 4 806.00 1742.70 data output, complement (inverting, with reference to incident light) vgnd 5 806.00 1582.40 ground vdd 6 751.00 55.00 power supply cathode/plus 7 482.50 530.50 photodetector cathode connection cathode/plus 8 576.50 999.50 photodetector cathode connection anode/minus 9 301.50 999.50 photodetector anode connection anode/minus 10 181.50 999.50 photodetector anode connection
vitesse semiconductor corporation advance product information vsc7709 1.25gb/s photodetector/transimpedance amplifier for optical communication page 6 g52362-0, rev 2.1 04/02/01 ? vitesse semiconductor corporation 741 calle plano camarillo, ca 93012 tel: (800) vitesse fax: (805) 987-5896 email: prodinfo@vitesse.com internet: www.vitesse.com package information reference isometric to-46 flat window package
vitesse semiconductor corporation advance product information vsc7709 1.25gb/s photodetector/transimpedance amplifier for optical communication g52362-0, rev 2.1 page 7 04/02/01 ? vitesse semiconductor corporation 741 calle plano camarillo, ca 93012 tel: (800) vitesse fax: (805) 987-5896 email: prodinfo@vitesse.com internet: www.vitesse.com to-56 flat window package reference isometric
vitesse semiconductor corporation advance product information vsc7709 1.25gb/s photodetector/transimpedance amplifier for optical communication page 8 g52362-0, rev 2.1 04/02/01 ? vitesse semiconductor corporation 741 calle plano camarillo, ca 93012 tel: (800) vitesse fax: (805) 987-5896 email: prodinfo@vitesse.com internet: www.vitesse.com to-46 ball lens package?7mm lead length reference isometric
vitesse semiconductor corporation advance product information vsc7709 1.25gb/s photodetector/transimpedance amplifier for optical communication g52362-0, rev 2.1 page 9 04/02/01 ? vitesse semiconductor corporation 741 calle plano camarillo, ca 93012 tel: (800) vitesse fax: (805) 987-5896 email: prodinfo@vitesse.com internet: www.vitesse.com to-46 ball lens package ? 13mm lead length reference isometric
vitesse semiconductor corporation advance product information vsc7709 1.25gb/s photodetector/transimpedance amplifier for optical communication page 10 g52362-0, rev 2.1 04/02/01 ? vitesse semiconductor corporation 741 calle plano camarillo, ca 93012 tel: (800) vitesse fax: (805) 987-5896 email: prodinfo@vitesse.com internet: www.vitesse.com ordering information the order number for this product is formed by a combination of the device type and package type. notice vitesse semiconductor corporation ( ? vitesse ? ) provides this document for informational purposes only. this document contains pre-production information about vitesse products in their concept, development and/or testing phase. all informaiton in this document, includ ing descriptions of features, functions, performance, technical specifications and availability, is subject to change without notice at any time. n othing contained in this document shall be construed as extending any warranty or promise, express or implied, that any vitesse product will be availabl e as described or will be suitable for or will accomplish any particular task. vitesse products are not intended for use in life support appliances, devices or systems. use of a vitesse product in such appl ications without writ- ten consent is prohibited. vsc7709 xx device type package photodetector/transimpedance amplifier wa: to-46 flat window with 1300nm pd wb: to-56 flat window with 1300nm pd wc: to-46 ball lens (7mm leads) with 1300nm pd wd: to-46 ball lens (13mm leads) with 1300nm pd x: bare dice without pd note: pd = 75m photodetector for optical communication
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