3 V Dual-Loop 50 Mbps to 1.25 Gbps
Laser Diode Driver
50 Mbps to 1.25 Gbps Operation
Single 3.3 V Operation
Bias Current Range 2 mA to 100 mA
Modulation Current Range 5 mA to 80 mA
Monitor Photo Diode Current 50 A to 1200 A
50 mA Supply Current at 3.3 V
Closed-Loop Control of Power and Extinction Ratio
www.DataSheet4UF.cuollmCurrent Parameter Monitoring
Laser Fail and Laser Degrade Alarms
Automatic Laser Shutdown, ALS
Optional Clocked Data
Supports FEC Rates
32-Lead (5 mm × 5 mm) LFCSP Package
The ADN2848 uses a unique control algorithm to control both
the average power and extinction ratio of the laser diode, LD,
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).
FUNCTIONAL BLOCK DIAGRAM
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