GENERAL DESCRIPTION
Like the ADN2870, the ADN2873 laser diode driver (LDD) is designed for advanced SFP and SFF modules, using SFF-8472 digital diagnostics. The ADN2873 supports NRZ data transmission operation from 50 Mbps up to 4.25 Gbps. With a new alarm scheme, this device avoids the shutdown issue caused by the system transient generated from various lasers.

FEATURES
   SFP/SFF and SFF-8472 MSA compliant
   SFP reference design available
   50 Mbps to 4.25 Gbps operation
   Automatic average power control
   Typical 60 ps output rise/fall time
   VCSEL, DFB, and FP laser support
   Bias current range: from 2 mA to 100 mA
   Modulation current range: from 5 mA to 90 mA
   Laser fail alarm and automatic laser shutdown (ALS)
   Bias and modulation current monitoring
   Voltage setpoint control
   Resistor setpoint control
   3.3 V supply
   24-lead 4 mm × 4 mm LFCSP
   Pin compatible with ADN2870

APPLICATIONS
   1×/2×/4× Fibre Channel SFP/SFF modules
   Multirate OC3 to OC48-FEC SFP/SFF modules
   LX-4 modules
   DWDM/CWDM laser transmitters
   HDTV (SMPTE family) laser transmitters