ADN2847ACPZ-32-RL

Laser Drivers Overview

The ADN2847ACPZ-32-RL is a dual-loop laser diode driver from Analog Devices, designed for operation at data rates between 50 Mbps and 3.3 Gbps. It functions on a single 3.3 V supply with a typical supply current of 50 mA. The device integrates closed-loop control for both average optical power and extinction ratio, eliminating the need for external components for these functions. 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. It features programmable alarms for laser fail and degrade conditions.

Laser Drivers Feature Summary

• Integrates dual-loop control algorithms for simultaneous management of average power and extinction ratio without external circuitry.
• Provides comprehensive protection through programmable alarms for laser end-of-life failure and impending degradation.
• Supports automatic laser shutdown (ALS) functionality to ensure safety during fault conditions.
• Offers full current parameter monitoring capabilities for system diagnostics and verification.

Laser Drivers Applications

• SONET OC-1/3/12/48 and SDH STM-0/1/4/16 transmission systems
• DWDM wavelength control utilizing dual monitor photodiode functionality
• Fibre Channel and Gigabit Ethernet optical interfaces

Laser Drivers Procurement Notes

Verify the specific package variant, as the ADN2847 family includes both 48-lead and 32-lead LFCSP options. Confirm that the 32-lead version meets your PCB footprint requirements. Ensure compatibility with your system's clocked data input if FEC support is required. Check for moisture sensitivity handling instructions due to the LFCSP packaging type.

Laser Drivers Selection Notes

Select this component when dual-loop control for both power and extinction ratio is required in a compact form factor. It is suitable for applications needing integrated alarm generation for laser health monitoring. Consider the 32-lead package for space-constrained designs compared to the 48-lead alternative. Verify that the 3.3 V single-supply operation aligns with your power budget.

Laser Drivers Part Context

This part belongs to the ADN2847 series of laser diode drivers manufactured by Analog Devices. It is specifically engineered for high-speed optical communication links requiring precise laser control. The device simplifies design by integrating functions typically handled by discrete components, reducing overall system complexity and board area.

Laser Drivers Replacement Considerations

The ADN2848 is a related model offering similar dual-loop control but operates up to 1.25 Gbps. The ADN2870 provides comparable performance with a 3.3 V supply and similar speed range. Verify pinout and package dimensions before substitution to ensure mechanical compatibility.