ADN2830-EVALZ Datasheet PDF - ADI

●GENERAL DESCRIPTION

●The ADN2830 provides closed loop control of the average optical power of a continuous wave (CW) laser diode (LD) after initial factory setup. The control loop adjusts the laser Ibias to maintain a constant Back-Facet Monitor Photo Diode (MPD) current and hence a constant laser optical

●power. The external PSET resistor is adjusted during factory setup to set the desired optical power. RPSET is set at 1.23/IAV, where IAVis the MPD current corresponding to the desired optical power. Programmable alarms are provided for laser fail (end of life), and laser degrade (impending fail).

●To provide monitoring of the MPD current, the MPD can be connected to the IMPD pin. In this case the MPD current is mirrored to the IMPDMON pin to provide a monitor, and internally to the PSET pin to close the control loop. By closing the feedback using IBMON rather than an MPD

●connected to PSET , the device is configured to control a constant current in the laser rather than a constant optical output power.

●FEATURES

●Bias Current range 4mA to 200 mA

●Monitor Photo Diode current 50uA to 1200uA

●Closed loop control of Average Power

●Laser fail and laser degrade alarms

●Automatic laser shutdown, ALS

●Full current parameter monitoring

●5 V operation

●-40"C to 85"C Temperature Range

●5mm x5mm 32 pin LFCSP package

●APPLICATIONS

●Fiber Optic Communication