ADN2892ACPZ-RL7

Overview

The ADN2892ACPZ-RL7 is a single-channel limiting amplifier manufactured by Analog Devices, designed for high-speed optical data conversion. It operates at data rates up to 4.25 Gbps with an input sensitivity of 3.5 mV p-p and accepts differential inputs up to 2.0 V p-p. The device features current mode logic (CML) outputs with a typical swing of 750 mV p-p and controlled rise/fall times of 70 ps. Powered by a single 3.3 V supply (range 2.9 V to 3.6 V), it consumes approximately 50 mA, resulting in 160 mW power dissipation. It integrates loss-of-signal detection and RSSI within a 16-lead LFCSP package.

Feature Summary

• Integrated loss-of-signal detection with programmable threshold and optional output inversion
• On-chip received signal strength indicator facilitating SFF-8472 compliance
• Selectable bandwidth filtering for multirate Fibre Channel module optimization
• Single-supply operation with low power dissipation

Applications

• 1x, 2x, and 4x Fibre Channel transceivers
• SFP, SFF, and GBIC optical transceivers
• Gigabit Ethernet transceivers
• Backplane receivers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging quantity and reel specifications. Ensure compatibility with RoHS standards and moisture sensitivity levels required for your assembly process. Confirm availability status directly with authorized distributors as supply conditions may vary.

Selection Notes

Select this component when designing optical receivers requiring integrated LOS and RSSI functionality to reduce external circuitry. Consider the selectable bandwidth filter if optimizing for legacy 1 Gbps transmitters to minimize noise. Ensure PCB layout supports the exposed pad thermal connection and differential CML output termination requirements.

Part Context

This part belongs to the ADN2892 series of limiting amplifiers from Analog Devices. It is specifically engineered for optoelectronic conversion applications where signal integrity and monitoring are critical. The device complements other timing and driver solutions within the manufacturer's portfolio for complete optical link implementations.

Replacement Considerations

Consult the official datasheet ordering guide for verified alternative part numbers within the same family. Ensure any substitute maintains identical pinout, voltage ranges, and performance characteristics for direct integration without schematic modifications.

FAQ

How is the Loss-of-Signal (LOS) threshold adjusted?

The LOS threshold is set by connecting a resistor between the THRADJ pin and VEE, allowing adjustment from 3.5 mV p-p to 35 mV p-p.

What is the function of the BW_SEL pin?

Driving BW_SEL high enables a 3.8 GHz bandwidth, while driving it low engages a 1.5 GHz low-pass filter to improve sensitivity for lower data rates.

How does the RSSI feature operate?

The on-chip RSSI monitors photodiode bias current to provide an average power measurement output, eliminating the need for external detector circuits.