MAX3273

+3.3V, 2.5Gbps Low-Power Laser Driver

Description

The MAX3273 is a compact, low-power laser driver for applications up to 2.7Gbps. The device uses a single +3.3V supply and typically consumes 30mA. The bias and modulation current levels are programmed by external resistors. An automatic power-control (APC) loop is incorporated to maintain a constant average optical power over temperature and lifetime. The laser driver is fabricated using Maxim's in-house, second-generation SiGe process.

The MAX3273 accepts differential CML-compatible clock and data input signals. Inputs are self-biased to allow AC-coupling. An input data-retiming latch can be enabled to reject input jitter if a clock signal is available.

The driver can provide bias current up to 100mA and modulation current up to 60mA_P-P with typical (20% to 80%) edge speeds of 59ps. A failure-monitor output is provided to indicate when the APC loop is unable to maintain average optical power. The MAX3273 is available in 4mm x 4mm, 24-pin QFN and thin QFN packages, as well as in die form.

Key Features

• 30mA Power-Supply Current
• Single +3.3V Power Supply
• Up to 2.7Gbps (NRZ) Operation
• Automatic Average Power Control with Failure Monitor
• Programmable Modulation Current from 5mA to 60mA
• Programmable Bias Current from 1mA to 100mA
• Typical Fall Time of 59ps
• Selectable Data Retiming Latch
• Complies with ANSI, ITU, and Bellcore SDH/SONET Specifications

Applications/Uses

Diagram

Typical Operating Circuit

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