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Amplifiers/Converters??

Maxim EAM driver with integrated bias T

Posted: 01 Oct 2003 ?? ?Print Version ?Bookmark and Share

Keywords:maxim integrated products? max3941? electro-absorption modulator driver? eam driver?

Maxim Integrated Products has introduced the MAX3941 10.7Gbps electro-absorption modulator (EAM) driver with integrated bias T. Operating from a single -5.2V or 5V supply, the product features a current consumption of 124mA, edge speed of 23ps, programmable modulation voltage of up to 3V, and programmable bias voltage of up to 1.25V.

The MAX3941 incorporates the functions of a biasing circuit and a modulation circuit, with integrated control op amps externally programmed by dc voltages. The integrated bias circuit provides a programmable biasing current up to 50mA, while the bias current reflects a bias voltage of up to 1.25V on an external 50 ohms load. The bias and modulation circuits are internally connected on chip, eliminating the need for an external bias inductor.

A high-bandwidth, fully differential signal path is internally implemented to minimize jitter accumulation. When a clock signal is available, the integrated data-retiming function can be selected to reject input-signal jitter.

The device also includes an adjustable pulse-width control circuit to precompensate for asymmetrical EAM characteristics. It is available in a 24-pin thin QFN package that measures 4-by-4mm, and operates over the -40C to 85C temperature range.





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