ADN2871ACPZ

Overview

The ADN2871ACPZ is a single-loop laser diode driver designed for advanced SFP and SFF optical modules compliant with the SFF-8472 digital diagnostics interface. It supports data rates from 50 Mbps to 4.25 Gbps and operates on a single 3.3 V supply. The device features automatic average power control via monitor photodiode feedback, bias current ranging from 2 mA to 100 mA, and modulation current from 5 mA to 90 mA. It includes laser fail alarms, automatic laser shutdown, and current monitoring. Packaged in a compact 4 mm × 4 mm LFCSP, it functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Supports operation from 50 Mbps to 4.25 Gbps for SFP/SFF applications
• Implements automatic average power control using monitor photodiode feedback
• Provides laser fail alarm detection and automatic laser shutdown (ALS) functionality
• Enables voltage or resistor-based setpoint control for average power and extinction ratio

Applications

• Advanced SFP optical transceiver modules
• SFF optical transceiver modules
• Systems utilizing VCSEL, DFB, or FP lasers
• Interfaces with ADuC70xx MicroConverters and ADN289x limiting amplifiers

Procurement Notes

Verify component authenticity through authorized Analog Devices channels due to limited availability status. Confirm package integrity and moisture sensitivity handling requirements prior to assembly. Cross-reference datasheet revisions to ensure compatibility with specific SFF-8472 implementations. Validate thermal performance within the specified -40°C to +85°C operational range during system integration.

Selection Notes

Select this driver for single-loop laser control applications requiring pin-compatibility with the ADN2870 dual-loop variant. Choose when design constraints necessitate a 4 mm × 4 mm LFCSP footprint. Ensure the application supports 3.3 V logic levels and utilizes external DAC or resistor networks for setpoint configuration. Verify that the target laser type, such as VCSEL or DFB, aligns with the specified bias and modulation current ranges.

Part Context

The ADN2871 belongs to the ADN287x family of laser drivers manufactured by Analog Devices. It serves as a single-loop counterpart to the ADN2870 dual-loop driver, sharing identical pinouts to facilitate flexible PCB layout strategies. This component addresses the need for compact, high-speed laser control in standard form-factor optical modules while maintaining compliance with industry diagnostic standards.

Replacement Considerations

The ADN2870 is a pin-compatible alternative offering dual-loop control capabilities. Designers may substitute the ADN2871 with the ADN2870 if dual-loop power management is required without altering the board layout. No other direct substitutes are documented.