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.

FEATURES

► Integrated AGC

► TO-46 can die size

► Integrated photo detector bias circuit

► Integrated photo current monitor

► Available in bare die

APPLICATIONS

► 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