The ADN2841 is a dual-loop 50 Mbps to 2.7 Gbps laser power and extinction ratio controller from Analog Devices. It features closed-loop control of power and extinction ratio, laser fail and degrade alarms, automatic laser shutdown, ALS, dual MPD functionality for DWDM, optional clocked data, full current parameter monitoring, 5 V operation, 48-lead LFCSP package, and 32-lead LFCSP package (reduced functionality).
The ADN2841 laser diode driver provides closed‑loop control of bias and modulation currents, enabling stable optical power and extinction‑ratio across a wide data‑rate range. It includes automatic laser shutdown, alarm monitoring, and optional dual monitor photodiode functionality for DWDM applications.
The device is supplied in 32‑lead and 48‑lead LFCSP packages, operates from a 5 V supply, and is rated for temperatures from –40 °C to +85 °C. Detailed specifications, pin assignments, and application notes are provided for system integration.
| Laser Bias Output Current | 2–100 mA |
|---|---|
| Modulation Current Output | 5–80 mA |
| Typical Rise/Fall Time | 80 ps |
| Supply Voltage | 5 V |
| Operating Temperature Range | –40 °C to +85 °C |
The device operates from –40 °C to +85 °C.
The typical rise and fall time is 80 ps.
It is offered in 32‑lead LFCSP and 48‑lead LFCSP packages.
When the ALS pin is high, both bias and modulation currents are turned off.