A82

Overview

The MACOM A82 is a discrete hybrid RF amplifier IC designed for broadband applications spanning 10 MHz to 300 MHz. It utilizes a two-stage silicon bipolar feedback architecture with thin film manufacturing processes to ensure accurate performance and high reliability. The device provides a typical gain of 25 dB and a P1dB output power of 20 dBm, with a noise figure of 2.8 dB. It operates on a 15 V supply voltage and features an isolation transformer in the feedback loop to achieve high reverse isolation exceeding 28.5 dB. The component is available in hermetically sealed TO-8 packages.

Feature Summary

• Utilizes a two-stage silicon bipolar feedback design for broadband stability
• Incorporates thin film manufacturing processes for precise performance characteristics
• Features an internal isolation transformer within the feedback loop
• Available in hermetically sealed TO-8 package configurations

Applications

• General purpose RF amplification in communication systems
• GPS receiver front-end signal conditioning
• Cascadable amplifier stages in multi-stage RF chains
• Broadband signal processing in industrial and defense equipment

Procurement Notes

Verify the specific package variant and environmental screening requirements against the official datasheet before procurement. Confirm that the TO-8 hermetic seal meets the necessary MIL-STD-883 standards if required for the application. Ensure supply chain sources are authorized distributors to guarantee component authenticity and traceability. Cross-reference the ordering information with the manufacturer's current product status to avoid obsolete stock issues.

Selection Notes

Select the A82 when a general-purpose, broadband RF amplifier is needed between 10 MHz and 300 MHz. Its high reverse isolation makes it suitable for cascading multiple stages without significant interaction. Consider this part for applications requiring a stable 25 dB gain and 20 dBm output power from a single 15 V supply. It is ideal for designs prioritizing reliability through hermetic sealing and thin-film technology over surface-mount alternatives.

Part Context

The A82 belongs to MACOM's portfolio of high-performance analog semiconductor solutions. As a legacy discrete hybrid amplifier, it represents the company's expertise in silicon bipolar and thin-film technologies. This component supports MACOM's focus on providing reliable RF and microwave solutions for critical infrastructure, including telecommunications, aerospace, and defense sectors where long-term availability and robust performance are essential.

Replacement Considerations

Public confirmed substitute part numbers include CA82 and A82-1. These variants share similar cascadable amplifier specifications and frequency ranges. Verify pinout compatibility and thermal requirements when substituting. Check for any differences in environmental screening levels or package dimensions to ensure mechanical fit within the existing design constraints.