ADN2841ACPZ-32-RL7

Overview

The ADN2841ACPZ-32-RL7 is a dual-loop laser diode driver from Analog Devices, designed for operation at data rates between 50 Mbps and 2.7 Gbps. It utilizes a 32-lead LFCSP package with reduced functionality compared to the 48-lead variant. The device operates on a single 5 V supply and integrates closed-loop control for both average optical power and extinction ratio. 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 manages both average power and extinction ratio without external components
• Integrated automatic laser shutdown (ALS) triggered by laser fail or degrade alarms
• Supports dual monitor photodiode functionality for DWDM wavelength fixing applications

Applications

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

Procurement Notes

Verify the specific package variant against design requirements, as the 32-lead version offers reduced functionality compared to the 48-lead counterpart. Confirm that the manufacturer's datasheet explicitly supports the intended data rate and current ranges for the application. Check for any product change notices or end-of-life notifications associated with this specific reel packaging code before finalizing procurement plans.

Selection Notes

Select this component when a compact solution is required for high-speed laser driving with integrated power and extinction ratio control. The 32-lead LFCSP package is suitable for designs prioritizing board space over the full feature set available in the 48-lead version. Ensure the system can accommodate the 5 V supply requirement and that the thermal dissipation capabilities of the PCB layout match the device's power specifications.

Part Context

This part belongs to the ADN2841 series of dual-loop laser diode drivers manufactured by Analog Devices. It is specifically engineered for optical communication standards requiring precise laser control. The device distinguishes itself through its ability to maintain stable optical output characteristics across varying temperature conditions and aging effects, utilizing internal monitoring circuits for continuous adjustment.

Replacement Considerations

The ADN2847 serves as a compatible alternative within the same family, offering similar dual-loop control capabilities but operating at a lower voltage and supporting higher data rates up to 3.3 Gbps. Designers must verify pin compatibility and functional equivalence, particularly regarding the reduced feature set of the 32-lead package variant.