A81-3

Overview

The A81-3 is a wideband RF amplifier from MACOM Technology Solutions, operating within the 20 MHz to 500 MHz frequency range. This component utilizes a discrete hybrid design with thin film manufacturing processes to ensure accurate performance and high reliability. It features a gain of 17.0 dB and a noise figure of 3.6 dB. The device is housed in a TO-8 metal package with four pins, designed for low-power applications requiring a 15 V power supply.

Feature Summary

• Discrete hybrid design utilizing thin film manufacturing processes for precise performance characteristics
• Wideband operation capability spanning from 20 MHz to 500 MHz
• High reliability construction suitable for demanding RF environments

Applications

• RF signal amplification in communication systems
• Test and measurement equipment front-ends
• Broadband receiver stages

Procurement Notes

Verify the specific revision suffix and pinout configuration against the official MACOM datasheet before integration. Confirm that the TO-8 package thermal and mechanical constraints align with the target PCB layout. Ensure the 15 V supply requirement matches the system power architecture. Cross-reference the impedance matching network requirements with the application notes provided in the manufacturer's documentation to guarantee optimal signal integrity.

Selection Notes

Select this component when a wideband, cascadable amplifier is required between 20 MHz and 500 MHz. The discrete hybrid design offers superior accuracy compared to monolithic alternatives. Consider the TO-8 package size and 15 V bias voltage during initial circuit planning. This model is appropriate for applications prioritizing reliability and consistent gain performance across a broad frequency spectrum without excessive power consumption.

Part Context

The A81-3 belongs to MACOM's portfolio of RF amplifiers designed for general-purpose and specialized communication applications. As part of the M/A-COM Technology Solutions lineage, it represents a legacy discrete hybrid technology still valued for its robustness. The component serves as a building block for systems requiring stable amplification over a wide bandwidth, supporting both single-stage and cascaded configurations in professional RF engineering contexts.

Replacement Considerations

Consult the official MACOM replacement guide for direct equivalents. Verify compatibility regarding pinout, package dimensions, and electrical specifications if substituting with other wideband RF amplifiers.