GENERAL DESCRIPTION
The ADN2531 laser diode driver can work with directly modulated laser diodes, including vertical-cavity surface-emitting laser (VCSEL), Fabry-Perot (FP) lasers, and distributed feedback (DFB) lasers, with a differential loading resistance ranging from 5 Ω to 140 Ω. The active back-termination in the ADN2531 absorbs signal reflections from the laser diode side of the output transmission lines, enabling excellent optical eye quality even when the TOSA end of the output transmission lines is significantly mismatched. The ADN2531 is a SFP+ MSA-compliant device, and its small package and enhanced ESD protection provides the optimum solution for compact modules in which laser diodes are packaged in low pin-count optical subassemblies.

FEATURES
   3.3 V operation
   Up to 11.3 Gbps operation
   Typical 26 ps rise/fall times
   Bias current range: 10 mA to 100 mA
   Differential modulation current range: 10 mA to 80 mA
   Voltage input control for bias and modulation currents
   Data inputs sensitivity: 150 mV p-p differential
   Automatic laser shutdown (ALS)
   Crosspoint adjustment (CPA)
   VCSEL, FP, DFB laser support
   SFF/SFP/XFP/SFP+ MSA compliant
   Optical evaluation board available
   Compact, 3 mm × 3 mm LFCSP

APPLICATIONS
   Optical transmitters, up to 11.3 Gbps, for SONET/SDH,
      Ethernet, and Fibre Channel applications
   SFF/SFP/SFP+/XFP/X2/XENPAK/XPAK MSA compliant
   300-pin optical modules, up to 11.3 Gbps