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| TRANSPORT PRODUCTS VSC7978 9.9 Gbps - 11.3 Gbps High Gain Transimpedance Amplifier for TO-Can Based ROSA Applications BENEFITS: Lowest Cost 10 Gbps ROSA Solution Designed Specifically for High Volume XFP Module Applications S P E C I F I C AT I O N S : Transimpedance Gain 4k ohm Differential F E AT U R E S : TO-46 Can Compatible Die Size 4k ohm Differential Transimpedance Gain Low Power, 140mW typ. Photodetector Cusrrent Monitor Voltage Output Single +3.3V Power Supply Integrated Photo Detecotor Bias Circuit Low Frequency Cutoff 30kHz Overload Current 4.5mA Limiting Output 360mV Differential 3dB Bandwidth in a TO-46 Can 8GHz NOTE: All Specifications are Typical BLOCK DIAGRAM: PB-VSC7978-001 VSC7978 9.9 Gbps - 11.3 Gbps High Gain Transimpedance Amplifier for TO-Can Based ROSA Applications GENERAL DESCRIPTION: The VSC7978 is a 9.9 Gbps - 11.3 Gbps high performance, low power transimpedance amplifier designed for use in TO-46 Can based Receiver Optical Sub Assemblies (ROSA) for optical communication networks; SONET/SDH (OC192/STM-64), 10G Ethernet, 10G Fiber Channel and OTN applications. The device is intended for use with a PIN photo detector or APD, and is capable of amplifying input currents of up to and greater than 3.5mAp-p with low duty-cycle distortion. The VSC7978 offers 4kohm differential transimpedance, eliminating the need for an additional postamplifier. The outputs limit to a typical differential value of 300mVp-p, increasing the dynamic range of the system by reducing the possibility of exceeding the input voltage range of the transceiver device. A space-saving filter connection is provided for a positive bias to the photo detector through a 50ohm resister to external VCCPD. The VSC7978 operates at 3.3V power supply and is offered as bare die form. For more information on Vitesse Products visit the Vitesse web site at www.vitesse.com or contact Vitesse Sales at (800) VITESSE or sales@vitesse.com (c)2004 Vitesse Semiconductor Corporation Vitesse, ASIC-Friendly, FibreTimer, TimeStream and Snoop Loop are trademarks of Vitesse Semiconductor Corporation. All other trademarks or registered trademarks mentioned herein are the property of their respective holders. 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. 741 Calle Plano Camarillo, CA 93012, USA Tel: +1 805.388.3700 Fax: +1 805.987.5896 www.vitesse.com |
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