A75-3

Overview

The MACOM A75-3 is a general-purpose RF amplifier IC designed for the 1MHz to 600MHz frequency range. It features a gain of 20.5dB and a noise figure of 1.7dB, powered by a 15V supply with a current draw of 14mA. The device operates within a temperature range of -62°C to +125°C and provides 25dB isolation. Key performance metrics include a P1dB compression point of 3dBm and an OIP3 of 16dBm. It utilizes Si technology in a TO-8-4 SMD/SMT package with a power dissipation rating of 500mW.

Feature Summary

• Discrete hybrid design utilizing thin film manufacturing processes for high reliability and accurate performance
• Cascadable architecture suitable for multi-stage signal amplification applications
• Single-channel operation optimized for general-purpose RF signal processing

Applications

• SATCOM ground terminals
• General-purpose RF signal amplification
• Wireless communication systems requiring low noise figures

Procurement Notes

Verify the specific ordering suffix and package variant against the manufacturer's official datasheet before purchase. Confirm that the TO-8-4 surface-mount configuration matches your PCB footprint requirements. Ensure the operating voltage and current specifications align with your system's power budget. Check for RoHS compliance status if environmental regulations apply to your deployment. Validate the thermal management capabilities of your enclosure to support the specified power dissipation limits.

Selection Notes

Select the A75-3 when a low noise figure of 1.7dB is critical for sensitive receiver front-ends. Choose this component over higher-frequency alternatives if the operational bandwidth remains below 600MHz. Consider its cascadable nature if multiple stages are required to achieve higher overall gain without significant signal degradation. Evaluate the TO-8-4 package constraints against available board space and mounting options.

Part Context

The A75-3 belongs to the A75 series of RF amplifiers manufactured by MACOM Technology Solutions. This series employs discrete hybrid designs using thin film processes to ensure consistent performance across varying environmental conditions. The A75-3 specifically targets applications requiring precise gain control and low noise characteristics within the VHF and lower UHF bands.

Replacement Considerations

Consult the official MACOM datasheet for direct cross-reference part numbers. Verify pin compatibility and electrical parameter overlaps before substituting with other RF amplifiers. Ensure any alternative component meets the same thermal and frequency range requirements.