MAX3863EGJ

SONET and SDH Transmission Systems
WDM Transmission Systems
3.2Gbps Data Communications
Add/Drop Multiplexers
Digital Cross-Connects
Section Regenerators
Long-Reach Optical Transmitters

The MAX3863EGJ is designed for direct modulation of laser diodes at data rates up to 2.7Gbps. An automatic power-control (APC) loop is incorporated to maintain a constant average optical power. Modulation compensation of MAX3863EGJ is available to increase the modulation current in proportion to the bias current. The optical extinction ratio is then maintained over temperature and lifetime.

The laser driver MAX3863EGJ can modulate laser diodes at amplitudes up to 80mA. Typical (20% to 80%) edge speeds are 50ps. The MAX3863 can supply a bias current up to 100mA. External resistors can set the laser output levels.

The MAX3863EGJ includes adjustable pulse-width control to minimize laser pulse-width distortion. The device offers a failure monitor output to indicate when the APC loop is unable to maintain the average optical power.

The MAX3863EGJ accepts differential CML clock and data input signals with on-chip 50 termination resistors. If a clock signal is available, an input data-retiming latch can be used to reject input pattern-dependent jitter. The laser driver MAX3863EGJ is fabricated with Maxim's in-house second-generation SiGe process.