The ONET4211LD is a laser driver for multiple fiber optic applications up to 4.25 Gbps. It features programmable bias and modulation currents, supports automatic power control, temperature compensation, fault detection, and other functions. The device is available in a small-footprint 24-pin QFN package, and operates at a voltage of 3.3V.
The ONET4211LD is a power-efficient laser driver designed for multiple fiber optic applications up to 4.25 Gbps. It accepts CML input data and provides both bias and modulation currents for driving a laser diode. The device incorporates automatic power control (APC), temperature compensation of the modulation current, fault detection, and current monitor features.
| Operating Speed Range | 155 Mbps to 4.25 Gbps |
|---|---|
| Bias Current Range | 1 mA to 100 mA |
| Modulation Current Range | 5 mA to 85 mA |
| Supply Voltage | 3.3 V |
| Operating Temperature Range | -40°C to 85°C |
| Package Type | 24-Lead QFN |
The device supports multirate operation from 155 Mbps up to 4.25 Gbps.
The circuit requires a single 3.3-V supply.
Yes, it incorporates an APC loop to compensate for changes in laser threshold current over temperature and lifetime.