ADN2531

11.3 Gbps, Active Back-Termination, Differential Laser Diode Driver ADN2531 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 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. The modulation and bias currents are programmable via the MSET and BSET control pins. By driving these pins with control voltages, the user has the flexibility to implement various average optical power and e...