ADN2841ACP-48

Overview

The ADN2841ACP-48 is a dual-loop laser diode driver from Analog Devices, designed for operation at data rates from 50 Mbps to 2.7 Gbps. It utilizes a unique control algorithm to manage both average power and extinction ratio of the laser diode following initial factory setup. The device operates on a single 5 V supply and integrates closed-loop control circuitry, reducing external component count and PCB area. Key electrical parameters include a bias current range of 2 mA to 100 mA, a modulation current range of 5 mA to 80 mA, and a monitor photodiode current range of 50 µA to 1200 µA. Typical rise and fall times are specified at 80 ps.

Feature Summary

• Dual-loop control architecture for simultaneous regulation of laser average power and extinction ratio
• Integrated dual monitor photodiode (MPD) functionality supporting DWDM wavelength fixing applications
• Programmable alarm systems for laser fail and laser degrade conditions with automatic laser shutdown capability

Applications

• DWDM dual MPD wavelength fixing
• SONET OC-1/3/12/48 transmission systems
• SDH STM-1/4/16 optical networking
• Fibre Channel interfaces
• Gigabit Ethernet links

Procurement Notes

Verify the specific suffix designation carefully during procurement, as package variants such as the 32-lead LFCSP exist with reduced functionality compared to the 48-lead version. Confirm availability status directly with authorized distributors or the manufacturer, as supply constraints may apply to this component series. Ensure that the selected part matches the required pinout and feature set for the target design.

Selection Notes

Select the ADN2841ACP-48 when full dual-loop control and dual MPD support are required for high-speed optical transceivers. This 48-lead LFCSP package provides the complete feature set, unlike the 32-lead variant which offers reduced functionality. Consider the 5 V operating voltage and the integrated alarm features when designing protection logic for the laser diode assembly.

Part Context

The ADN2841 belongs to Analog Devices' family of high-performance laser diode drivers intended for optical communication infrastructure. It addresses the need for precise laser control in dense wavelength division multiplexing (DWDM) and synchronous optical networking (SONET/SDH) environments. The device simplifies design by integrating complex control loops that would otherwise require discrete components.

Replacement Considerations

Publicly confirmed substitute part numbers for the ADN2841ACP-48 are not available in the provided documentation. Engineers should consult official Analog Devices resources for potential cross-references or newer generation replacements.