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 a 4mm✕4mm, 24-pin QFN package, as well as in die form.
The MAX3273 laser driver from Maxim operates from a single +3.3 V supply and consumes about 30 mA. It provides programmable bias current (1‑100 mA) and modulation current (5‑60 mA) with typical edge speeds of 59 ps. An automatic power‑control (APC) loop maintains constant average optical power and includes a failure‑monitor output.
The device is offered in a 4 mm × 4 mm, 24‑pin QFN package (or die form) and supports differential CML‑compatible clock and data inputs. Pin functions, absolute‑maximum ratings, and detailed DC/AC electrical characteristics are listed in the datasheet.
| Supply Voltage | +3.3 V |
|---|---|
| Typical Fall Time (20%‑80%) | 59 ps |
| Package | 4 mm × 4 mm, 24‑pin QFN |
The MAX3273 operates from a single +3.3 V supply.
The typical fall time is 59 ps.
The QFN package has 24 pins.