+3.3V, 2.5Gbps Low-Power Laser Driver

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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 60mAP-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.
MAX3273: Typical Operating Circuit MAX3273: Typical Operating Circuit Enlarge+

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


  • 2.5Gbps Optical Transmitters
  • Add/Drop Multiplexers
  • Digital Cross-Connects
  • SONET OC-48 and SDH STM-16
  • Transmission Systems
Product Reliability Reports: MAX3273.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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