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