Overview
The MO2040-14 is a high-gain limiting amplifier designed by Mindspeed Technologies, tailored for high-speed signal processing applications capable of supporting data rates up to 2.125 Gbps. It operates on a 3.3V power supply and features Positive Emitter-Coupled Logic (PECL) outputs. This amplifier is optimized for several high-speed communication standards, including Fibre Channel, Ethernet, and SDH/SONET.
Key Features
The device boasts robust features such as:
– Input Sensitivity: A typical sensitivity of 2 mV at 1.25 Gbps ensures efficient signal amplification.
– Power Monitoring: Two analog Received Signal Strength Indication (RSSI) outputs are included, providing either average or peak-to-peak input signal strength monitoring.
– DC Offset Cancellation: An integrated circuit negates DC offset, enhancing signal integrity, which can also be disabled to suit burst mode applications.
– Energy Efficiency: The component is designed for low power consumption, utilizing only 170 mW.
– Output Jam Function: This facilitates control over the output signal under specific conditions.
– Packaging: Comes in a compact 16-pin 3×3 mm QFN package.
Additional Utility and Support
The MO2040-14 includes functional enhancements such as a level detector that allows users to set precise thresholds for logic outputs. This feature synergizes with the two RSSI outputs for comprehensive signal monitoring. Mindspeed also provides reference designs for Small Form-factor Pluggable (SFP) transceivers at 1.25 Gbps and 4.25 Gbps on their website, demonstrating the chip’s utility in real-world scenarios.
Applications
This limiting amplifier is aimed at various digital communication applications:
– 1.0625 and 2.125 Gbps Fibre Channel
– 1.25 Gbps Ethernet
– 1.25 Gbps Synchronous Digital Hierarchy (SDH)/SONET
Typical Application Circuit
The typical application diagram outlines the integration of the MO2040-14 within a signal processing chain, which includes an AC-coupled Transimpedance Amplifier (TIA), a Clock Data Recovery Unit, a photodiode, and signal monitoring through RSSI outputs. The diagram also depicts the DC_Servo control features, threshold setting circuit, and options for AC or DC coupling—as detailed in the Applications Information section.
Variants and Ordering Information
Alongside the MO2040-14, Mindspeed offers a range of similar limiting amplifiers with different speed capabilities and output types—such as the M02050-14 for applications up to 2.5 Gbps (PECL outputs), and two models (M02049-14 and M02043-14) for up to 4.3 Gbps (CML outputs).
Confidentiality Notice
The datasheet is marked “Mindspeed Proprietary and Confidential,” suggesting that the information contained within is for authorized use only.
Date of Publication
The datasheet was published in December 2005.
References:
Download: MO2040-14 3.3V Limiting Amplifier for Applications to 2.125 Gbps Datasheet
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