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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