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PHY1040：125Mbps to 1.25Gbps VCSEL/Laser Driver and Postamplifier

Low-Cost Programmable 1.25G Transceiver

The PHY1040-01 is a continuous-mode VCSEL/laser driver and limiting amplifier for use within fiber optic modules for SFP and SFF applications. Used with the PHY1095-01 transimpedance amplifier and a low-cost serial EEPROM or microcontroller, the device forms a complete SFP module solution. The transmit section integrates a modulator output stage optimized as a laser or VCSEL driver in common anode configurations. The bias current can be controlled either by a fast-settling APC loop or in open-loop mode, which uses a temperature lookup table. The receiver includes a limiting amplifier with programmable bandwidth. A signal-detect/loss-of-signal function is implemented using the input-signal modulation amplitude with user-selectable threshold and hysteresis. Operating with a 3.3V supply and rated from the -40°C to +95°C ambient operating temperature range, the PHY1040-01 is housed in a 32-pin, 5mm x 5mm, RoHS-compliant QFN package.

Key Features Common Anode VCSEL Driver Output Stage with 32mA max Modulation Drive and 20mA Bias Current Continuous-Mode Laser Driver with Up to 80mA Modulation and 90mA Bias Current Closed or Open-Loop Bias Mode with Temperature Lookup Table Temperature-Compensated Modulation Current Limiting Amplifier with Programmable Lowpass Filter and Output Swing Device Settings Stored in External 2k EEPROM

PHY1040: Block Diagram Applications/Uses Fast Ethernet Gigabit Ethernet OC-3

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Related Products

• PHY1095：High-Sensitivity Transimpedance Amplifier

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