GENERAL DESCRIPTION

The ADN2847 uses a unique control algorithm to control both 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).

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 × 7 mm) LFCSP package

32-lead (5 mm × 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