A81-1

Overview

The A81-1 is a cascadable RF amplifier IC from MACOM Technology Solutions, operating within a frequency range of 10 MHz to 300 MHz. It utilizes a discrete hybrid design with thin film manufacturing processes for high reliability. The device features a two-stage silicon bipolar feedback architecture with an isolation transformer in the feedback loop to ensure high reverse isolation. Typical performance specifications include a gain of 25 dB, noise figure of 2.4 dB, and output level of +13.5 dBm. It is housed in a hermetically sealed TO-8 package.

Feature Summary

• Discrete hybrid design using thin film manufacturing processes for accurate performance and high reliability
• Two-stage silicon bipolar feedback amplifier design with isolation transformer for high reverse isolation
• Hermetically sealed TO-8 package construction

Applications

• General purpose RF amplification
• GPS signal processing
• Broadband frequency applications

Procurement Notes

Verify the specific datasheet revision (e.g., Rev V3) and environmental screening options such as MIL-STD-883 availability directly with the manufacturer or authorized distributors. Confirm that the TO-8 package variant matches the required mechanical interface. Ensure that the ordering suffix does not alter functional characteristics unless explicitly documented in the official component documentation.

Selection Notes

Select the A81-1 when a cascadable amplifier with broadband coverage from 10 MHz to 300 MHz is required. Consider its typical 25 dB gain and 2.4 dB noise figure for low-noise applications. Evaluate the need for hermetic sealing and potential MIL-STD-883 screening if operating in harsh environments. Compare against other cascadable models like the SMA81-1 if surface mount packaging is preferred over the TO-8 form factor.

Part Context

The A81-1 belongs to a family of cascadable RF amplifiers manufactured by M/A-COM Technology Solutions, Inc. This series includes various models designed for different frequency ranges, all sharing similar discrete hybrid construction methods. The A81-1 specifically targets the lower end of the UHF spectrum, offering a robust solution for applications requiring stable amplification across a wide bandwidth.