3.3V DIRECT-COUPLED LASER DRIVER WITH 60mA OF MODULATION CURRENT UP TO 2.7Gbps
SUNNYVALE, CA-March 8, 2002-Maxim Integrated Products introduces the MAX3850 2.7Gbps, single 3.3V, direct-coupled laser driver. Consuming only 116mW of power, the laser driver is capable of providing 5mA to 60mA of direct-coupled modulation current (80mA AC-coupled) and 1mA to 100mA of bias current. 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 OC48/SDH STM16, metro mesh/ring architectures, metro DWDM, and long-haul systems. Packaged in a 32-pin TQFP, the MAX3850 operates from -40°C to +85°C. Prices start at $17.45 (1000-up, FOB USA).
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