Laser Drivers Laser Driver For Projectors

Laser Drivers 155Mbps to 4.25Gbps SFF/SFP Laser Driver with Extinction Ratio Control

Laser Drivers 3.3V 2.5Gbps SDH/ SONET Laser Driver

Laser Drivers 155Mbps to 622Mbps SFF/SFP Laser Driver with Extinction Ratio Control

Laser Drivers 3.3V, 2.5GBps Burst Mode Laser Diode Driver

Laser Drivers 3.3V-5V 1.25 Gbps 25 mA LDD

Laser Drivers 3.3V-5V 1.25 Gbps 25 mA LDD

The MAX3946 is a +3.3V, multirate, low-power laser diode driver designed for Ethernet and Fibre Channel transmission systems at data rates up to 11.3Gbps. This device is optimized to drive a differential transmitter optical subassembly (TOSA) with a 25Ω flex circuit. The unique design of the output stage enables use of unmatched TOSAs, greatly reducing headroom limitations and lowering power consumption.The device receives differential CML-compatible signals with on-chip line termination. It can deliver laser modulation current of up to 80mA, at an edge speed of 22ps (20% to 80%), into a 5Ω to 25Ω external differential load. The device is designed to have a symmetrical output stage with on-chip back terminations integrated into its outputs. A high-bandwidth, fully differential signal path is implemented to minimize deterministic jitter. An equalization block can be activated to compensate for the SFP+ connector. The integrated bias circuit provides programmable laser bias current up to 80mA. Both the laser bias generator and the laser modulator can be disabled from a single pin.A 3-wire digital interface reduces the pin count and permits adjustment of input equalization, pulse-width adjustment, Tx polarity, Tx deemphasis, modulation current, and bias current without the need for external components. The MAX3946 is available in a 4mm x 4mm, 24-pin TQFN package.Applications10GBASE-LR SFP+ Optical Transceivers10GBASE-LRM SFP+ Optical Transceivers10GFC SFP+ Optical Transceivers4x/8x FC SFP+ Optical TransceiversOC192-SR XFP/SFP+ SDH/SONET Transceivers

Laser Drivers Burst-Mode LDD with Integrated Post Amp

The MAX3766 is a complete, easy-to-program laser driver for fiber optic LAN transmitters, optimized for operation at 622Mbps. It includes a laser modulator, automatic power control (APC), and a failure indicator with latched shutdown.Laser modulation current can be programmed up to 60mA at 622Mbps. A programmable modulation temperature coefficient can be used to keep the transmitted extinction ratio nearly constant over a wide temperature range. The modulator operates at data rates up to 1.25Gbps at reduced modulation current. APC circuitry uses feedback from the laser's monitor photodiode to adjust the laser bias current, producing constant output power regardless of laser temperature or age. The MAX3766 supports laser bias currents up to 80mA.The MAX3766 provides extensive laser safety features, including a failure indicator with latched shutdown and a smooth start-up bias generator. These features help ensure that the transmitter output does not reach hazardous levels. The MAX3766 is available in a compact 20-pin QSOP and dice.Applications1.25Gbps Ethernet Transmitters1.25Gbps Fiber Optic LAN Transmitters622Mbps ATM Transmitters