Analog Devices Inc. ADN2847ACPZ-32-RL7

Description
The ADN2847 is a 3.3 V dual-loop laser diode driver that operates from 50 Mbps to 3.3 Gbps. It uses a unique control algorithm to control both average power and extinction ratio of the laser diode after initial factory setup. External component count and PCB area are low, as both power and extinction ratio control are fully integrated. Programmable alarms are provided for laser fail (end of life) and laser degrade (impending fail). Optional dual MPD current monitoring is designed into the ADN2847 specifically for DWDM wavelength control.

Features
50 Mbps to 3.3 Gbps operation
Single 3.3 V operation
Typical rise/fall time: 80 ps
Bias current range: 2 mA to 100 mA
Modulation current range: 5 mA to 80 mA
Monitor photodiode current: 50 μA to 1200 μA
Dual MPD functionality for DWDM
50 mA supply current at 3.3 V
Closed-loop control of power and extinction ratio
Full current parameter monitoring
Laser fail and laser degrade alarms
Automatic laser shutdown (ALS)
Optional clocked data
Supports FEC rates
48-lead (7 mm x 7mm) LFCSP package
32-lead (5 mm x 5 mm) LFCSP package

Applications
SONET OC-1/3/12/48
SDH STM-0/1/4/16
Fibre Channel
Gigabit Ethernet
DWDM dual MPD wavelength control