ADN2892ACPZ-RL

Overview

The ADN2892ACPZ-RL is a single-channel limiting amplifier manufactured by Analog Devices, designed for high-speed optical transceiver applications. It operates on a single 3.3 V supply with a maximum data rate of 4.25 Gbps and supports input sensitivity down to 3.5 mV p-p. The device features integrated loss-of-signal detection and a received signal strength indicator compliant with SFF-8472 standards. It utilizes a 16-lead LFCSP package measuring 3 mm × 3 mm and functions within an extended temperature range from −40°C to +95°C.

Feature Summary

• Integrated RSSI detector enables SFF-8472-compliant average power measurement without external circuitry
• Programmable loss-of-signal detector with selectable threshold levels for flexible system integration
• Selectable bandwidth filtering optimizes receiver sensitivity for legacy low-cost laser sources

Applications

• Fibre Channel transceivers supporting 1x, 2x, and 4x rates
• SFP, SFF, and GBIC optical transceiver modules
• Gigabit Ethernet optical transceivers
• High-speed backplane receivers

Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm the specific ordering suffix matches the required reel quantity and RoHS compliance status. Ensure storage conditions account for moisture sensitivity level requirements prior to soldering.

Selection Notes

Evaluate the input signal characteristics against the specified differential input range and sensitivity limits. Consider the thermal resistance of the LFCSP package for adequate heat dissipation in dense PCB layouts. Verify that the output buffer drive capability matches the downstream load impedance requirements.

Part Context

This component belongs to the ADN2892 series of limiting amplifiers optimized for fiber optic communication systems. It serves as a critical interface between photodiodes and clock recovery circuits in optical networking equipment. The design focuses on minimizing jitter while maintaining high gain across varying signal strengths.

Replacement Considerations

Consult the official Analog Devices documentation for verified substitute part numbers. Cross-reference pin configurations and electrical specifications to ensure functional compatibility before implementation.

FAQ

How is the loss-of-signal threshold adjusted?

The LOS threshold is programmable via an external resistor connected between the THRADJ pin and VEE, allowing settings between 3.5 mV p-p and 35 mV p-p.

What is the purpose of the BW_SEL pin?

Driving BW_SEL logic low activates a 1.5 GHz low-pass filter to reduce noise and relaxation oscillation for lower data rates, while logic high provides full bandwidth operation.