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Maxim laser driver provides 60mA direct-coupled modulation current

Posted: 29 Apr 2002 ?? ?Print Version ?Bookmark and Share

Keywords:max3850? laser driver? laser diode driver? oc 78? stm 16?

The MAX3850 3.3V laser driver from Maxim Integrated Products provides 5mA to 60mA of direct-coupled modulation current (80mA ac-coupled) and 1mA to 100mA of bias current, while consuming 116mW of power.

The device functions up to 2.7Gbps and is designed for OC-48 and STM-16 networks, as well as metro mesh/ring architectures, and DWDM and long-haul systems.

An automatic power control feedback loop is incorporated into the IC to maintain a constant average power over temperature and lifetime. A synchronizing input latch, which can be implemented depending on the presence of a clock signal, can be added to reduce jitter.

The driver provides a laser current-enabled 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.

The MAX3850 is packaged in a 32-pin TQFP housing and operates from -40C to 85C. Prices start at $17.45 for quantities of 1,000 and up.

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