QuickView - MAX3863 2.7Gbps Laser Driver with Modulation Compensation

Description

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The MAX3863 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 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 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 MAX3863 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 MAX3863 accepts differential CML clock and data input signals with on-chip 50Ω 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 is fabricated with Maxim's in-house second-generation SiGe process.

An evaluation kit is available: MAX3863EVKIT

Key Features

Applications/Uses

	Single +3.3V Power Supply
	58mA Power-Supply Current
	Up to 2.7Gbps (NRZ) Operation
	On-Chip Termination Resistors
	Automatic Power Control (APC)
	Compensation for Constant Extinction Ratio
	Programmable Modulation Current Up to 80mA
	Programmable Bias Current Up to 100mA
	50ps Typical Rise/Fall Time
	Pulse-Width Adjustment Circuit
	Selectable Data-Retiming Latch
	Failure Detector
	Mark-Density Monitor
	Current Monitors
	ESD Protection

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