Maxim introduces direct-coupled laser driver

February 11, 2002--Maxim Integrated Products has introduced the MAX3850 2.7-Gbit/sec, single 3.3 V, direct-coupled laser driver. The laser driver consumes 116 mW of power and is capable of providing 5 mA to 60 mA of direct-coupled modulation current (80 mA AC-coupled) and 1 mA to 100 mA of bias current, claims the company.

Feb 11th, 2002

Maxim Integrated Products has introduced the MAX3850 2.7-Gbit/sec, single 3.3 V, direct-coupled laser driver. The laser driver consumes 116 mW of power and is capable of providing 5 mA to 60 mA of direct-coupled modulation current (80 mA AC-coupled) and 1 mA to 100 mA of bias current, claims the company.

An automatic power control (APC) feedback loop is incorporated to maintain a constant average power over temperature and lifetime. To reduce jitter, the MAX3850 has an optional synchronizing input latch that can be implemented depending on the presence of a clock signal. The MAX3850 provides a laser current enable control and two current monitors that are proportional to the laser bias and modulation currents. A failure-monitor output is provided to indicate when the APC loop is unable to compensate and maintain average optical power. Designed to be DC-coupled to the laser diode, the MAX3850 greatly simplifies interface requirements and reduces component count.

The MAX3850 is designed for SONET OC-48/SDH STM-16, metro mesh/ring architectures, metro DWDM, and long-haul systems. Packaged in a 32-pin TQFP, the MAX3850 operates from -40 degrees Celsius to +85 degrees Celsius. Prices start at $17.45 in quantities of 1,000 or more.

For more information about Maxim Integrated Products (Sunnyvale, CA), visit the company's Web site at www.maxim-ic.com.

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