ADN2890ACPZ-RL

Overview

The ADN2890ACPZ-RL is a high-gain limiting amplifier designed for SONET, Gigabit Ethernet, and Fibre Channel optical receivers. It operates from a single 3.3 V supply with low power dissipation of 130 mW. The device supports input data rates up to 2700 Mb/s and can operate at speeds up to 3.2 Gb/s for LX4 transceivers. Key electrical parameters include an input sensitivity of 3 mV p-p, CML outputs with 700 mV p-p differential swing, and 80 ps rise/fall times. It features a programmable LOS detector (2 mV to 13 mV) and an SFF-8472 compliant RSSI function.

Feature Summary

• Integrates quantization and loss of signal detection functions within a single component.
• Provides on-chip received signal strength indicator measurement based on direct photodiode current sensing.
• Features internally terminated 50 Ω differential inputs and CML outputs.
• Includes a squelch mode that disables outputs when the input signal falls below the programmed threshold.

Applications

• SFP/SFF/GBIC optical transceivers
• OC-3/12/48, Gigabit Ethernet, and Fibre Channel receivers
• 10GBASE-LX4 transceivers
• WDM transponders

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature range. Confirm RoHS compliance status as indicated in the ordering guide. Ensure compatibility with the required PCB layout guidelines, particularly regarding the exposed pad connection to ground via filled vias. Check for any recent revision history updates that may affect pin configurations or specifications.

Selection Notes

Select this component for applications requiring a compact solution for optical receiver front-ends. The integrated RSSI functionality eliminates the need for external average Rx power detection circuitry in SFF-8472 compliant designs. Consider the 16-lead LFCSP package for space-constrained boards. Ensure the design supports the required 3.3 V single-supply operation and manages the thermal resistance characteristics of the package.

Part Context

The ADN2890 belongs to Analog Devices' family of high-speed limiting amplifiers optimized for optical communication interfaces. It serves as a critical interface between the receive optical sub-assembly (ROSA) and the host system, handling signal quantization and monitoring. The device is part of the broader portfolio supporting standards such as SONET and Gigabit Ethernet.

Replacement Considerations

ADN2890ACPZ-RL7