MAX3869EHJ

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The MAX3869EHJ is an advanced Laser Driver for per photonic modulator 100-Gb/s and beyond applications. Developed by Maxim Integrated, the MAX3869EHJ is a high-efficiency driver intended for the optical modules used in datacoms and telecoms OC-192, 10GbE, and 40GbE links. This low-profile, low-RDS(on), single-ended driver allows the modulator to operate within the linear range curve, increasing the eye mask margin in systems with higher output data rates.

The MAX3869EHJ is an integrated circuit specifically optimized for high speed laser diodes used in optical communication systems. The MAX3869EHJ features a low-RDS(on) output driver stage to provide high voltage efficiency, a fast settling time and a low propagation delay for improved eye mask margin. The high slew rate allows for a wide range of modulation data rates. The wide input common mode range and unity gain AC-coupled inputs allow for direct driving from binary logic. Advanced protection features are also included to maximize reliability in optical applications where high power laser diodes are used.

The MAX3869EHJ application field is focused on including 10GbE, 40GbE, 100-Gb/s and beyond in optical communication systems. The MAX3869EHJ not only has reduced power consumption and EMI/RFI interference, it also has the advanced protection features needed for high-power laser diodes. The driver circuit allows the laser diode to be efficiently modulated in the linear region of its curve, improving the data output rate and eye mask margin in high-speed systems.

The MAX3869EHJ is a current-mode, low power, and single ended driver that uses a constant current sink control loop which adjusts the current source and acts as a voltage to current converter. The power supply for the driver circuit is generated by an internal, low noise, charge pump. The charge pump runs continuously, allowing for the optimized coefficient of efficiency. It also features a wide input common mode voltage range, from 4.5V to 5.5V, allowing for direct driving from binary logic. It also has advanced protection features, like overvoltage protection (OVP) as well as a long-term OVP, which can be enabled for current-limiting applications.

In summary, the MAX3869EHJ offers high performance, low-profile, and low-RDS(on) opto-electronic drivers. It allows modulators to operate within the linear range curve, increasing the eye mask margin in systems with higher output rates. It comes with advanced protection features, enabling reliable operations in high-power laser diode applications. This makes it an ideal choice for optical communication systems with 10GbE, 40GbE, 100-Gb/s and beyond data output rates.

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