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| VSC7878 10 Gbps Linear Transimpedance Amplifier BLOCK DIAGRAM: VCCPD VCC VCCF DOUTP 40 W PDCAP 10 W FILTER1 PD IIN TIA Average Input Current Monitor AGC FILTER2 IMON GND1 GND2 DOUTN F E AT U R E S : Integrated AGC TO-46 can die size Integrated photo detector bias circuit BENEFITS: Linear operation over the input power range of the device Enables high volume ROSA assembly Provides the best RF match to the photo detector and reduces the component count inside the ROSA Used for fiber alignment and diagnostic capabilities Fully tested, known good die Integrated photo current monitor Available in bare die A P P L I C AT I O N S : 10 G receiver optical sub-assemblies: -9.983 Gbps SONET OC-192/SDH STM-64 -10.3 Gbps Ethernet -10.5 Gbps Fibre Channel -10.7 Gbps OTN G.709/G.975 -12.5 Gbps SONET with FEC -DWDM SONET/SDH Transponders: -XENPAK, X2, XPAK modules -300-pin MSA modules Transceivers: -XFP modules S P E C I F I C AT I O N S : Supply voltage: 3.3 V +/- 10% Total harmonic distortion: 3% (typical) Differential output swing: 500 mV (linear operation) Bandwidth: 8 GHz (typical) Sensitivity: -18 dBm OMA (typical) Max input current for linear operation: 2 mA p-p (typical) Operating temperature from -30o to 105o C die backside VPPD-01376 Revision 1.0 VSC7878 10 Gbps Linear Transimpedance Amplifier GENERAL DESCRIPTION: The VSC7878 is a 10.3 Gbps transimpedance amplifier (TIA) designed for use in 10GBASE-LRM optical communication networks. The VSC7878 is intended for use with a PIN or APD photodetector and operates over a wide dynamic input range while maintaining excellent linearity. The gain varies to maintain linear amplification for input signals up to 2 mA maximum. A DC compensation circuit reduces the penalty of low extinction ratio signals. The VSC7878 also provides photodetector power supply filter components and has a photocurrent monitor output. WIRE BONDING DIAGRAM: PD Mounted on Capacitor VCCPD 3 GND OUTP 2 1 VCC 4 Capacitor OUTN VSC7878 Die Trademarks TM Vitesse, ASIC-Friendly, FibreTimer, TimeStream, Snoop Loop, Super FEC, FOCUSConnect, Meigs-II, Meigs-IIe, Lansing, Campbell-I, Barrington, PaceMaker, HOVCAT48, HOVCAT48e, HOVCAT192, HOVCAT192e, Micro PHY, FOCUS32, FOCUS16, IQ2200, NexSAS, VersaCAT, GigaStream, HawX, SparX, StaX, VstaX, SimpliPHY,VeriPHY, ActiPHY, XFP PRO, SFP PRO, Smart-LINK, OctalMAC, EQ Technology are trademarks in the United States and/or other jurisdictions of Vitesse Semiconductor Corporation. All other trademarks or registered trademarks mentioned herein are the property of their respective holders. Copyright (c) 2006 Vitesse Semiconductor Corporation ("Vitesse") retains the right to make changes to its products or specifications to improve performance, reliability or manufacturability. All information in this document, including descriptions of features, functions, performance, technical specifications and availability, is subject to change without notice at any time. While the information furnished herein is held to be accurate and reliable, no responsibility will be assumed by Vitesse for its use. Furthermore, the information contained herein does not convey to the purchaser of microelectronic devices any license under the patent right of any manufacturer. 741 Calle Plano Camarillo, CA 93012, USA Tel: +1 805.388.3700 Fax: +1 805.987.5896 www.vitesse.com sales@vitesse.com |
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