MAX3656ETG+T

The MAX3656ETG+T from Analog Devices is a versatile burst-mode laser driver capable of operating at data rates ranging from 155Mbps to 2.5Gbps. This device is designed to provide bias and modulation current for laser diodes, enabling rapid switching between on and off states in less than 2ns. It accepts PECL or CML data inputs and operates with a single supply voltage as low as +3.0V.

Key features include a digital automatic power-control (APC) loop for maintaining average optical power over temperature and lifetime, and a fail monitor to indicate when power levels cannot be maintained. The modulation current can be programmed from 10mA to 85mA, and the bias current from 1mA to 70mA. The device can also be configured for continuous mode applications by setting the burst enable high.

Packaged in a compact 24-pin, 4mm x 4mm thin QFN package, the MAX3656ETG+T is suitable for space-constrained designs. Its typical power consumption is 132mW, excluding bias and modulation currents. Applications include Fiber-to-the-Home (FTTH) and Fiber-to-the-Business (FTTB) broadband access systems, as well as APON, EPON, and GPON upstream transmitters.

This laser driver is surface-mounted and operates within a temperature range of -40°C to 85°C. Its DC-coupled operation and single +3.3V power supply simplify integration into various optical networking designs.