MAX3735AETG+T

The MAX3735AETG+T is a 2.7Gbps, low power SFP laser driver in 24 pin TQFN package. The device accept differential input data and provide bias and modulation currents for driving a laser. DC-coupling to the laser allows for multirate applications and reduces number of external components. It is fully compliant with the SFP MSA timing and the SFF-8472 transmit diagnostic requirements. An automatic power-control (APC) feedback loop is incorporated to maintain a constant average optical power over temperature and lifetime. It provide transmit-disable control, a single-point latched transmit-failure monitor output, photocurrent monitoring and bias-current monitoring to indicate when the APC loop is unable to maintain the average optical power. It is used in gigabit Ethernet SFP/SFF transceiver modules, multirate OC3 to OC48-FEC SFP/SFF transceiver modules and 1G/2G fibre channel SFP/SFF transceiver modules.

• Supply voltage range is 2.97V to 3.63V
• Operating temperature range from -40°C to +85°C
• SFP reference design available
• Programmable modulation current from 10mA to 60mA (DC-coupled), edge transition times <lt/>51ps
• Programmable modulation current from 10mA to 85mA (AC-coupled), power supply current is 27mA (typ)
• Programmable bias current from 1mA to 100mA, multirate 155Mbps to 2.7Gbps operation
• Automatic average power control
• On-chip pull-up resistor for TX_DISABLE
• Bias current monitor gain stability is +6% at 1mA ≤ IBIAS ≤ 100mA

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Communications & Networking

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