A77

Overview

The A77 is a general-purpose RF amplifier IC from MACOM Technology Solutions, operating within a frequency range of 2MHz to 600MHz. It utilizes a discrete hybrid design with thin film manufacturing processes for high reliability. The device features a single-stage bipolar transistor feedback architecture housed in a hermetically sealed TO-8 package. Key electrical specifications include a minimum small-signal gain of 16.5 dB and a maximum noise figure of 4.5 dB at 25°C. It delivers a minimum power output of 16.5 dBm at 1 dB compression. The unit requires a nominal 15 VDC supply with a maximum DC current draw of 50 mA.

Feature Summary

• Discrete hybrid construction using thin film manufacturing for accurate performance
• Single-stage bipolar transistor feedback design for broadband stability
• Hermetically sealed TO-8 package suitable for environmental screening

Applications

• General purpose RF amplification
• Cascadable signal processing stages
• Broadband communication systems

Procurement Notes

Verify the specific ordering suffix when purchasing, as connectorized versions (e.g., CA77) may differ in compliance status. Confirm that the TO-8 package variant aligns with your thermal and mechanical requirements. Ensure that the 15 VDC supply voltage matches your system design constraints. Check datasheet limits for guaranteed performance across the specified temperature ranges before integration.

Selection Notes

Select the A77 for applications requiring a wide bandwidth from 2MHz to 600MHz with moderate gain. Consider this component if hermetic sealing is necessary for harsh environments. Evaluate the 16.5 dBm output power against your link budget. Compare the 4.5 dB noise figure with other low-noise options if sensitivity is critical. Verify compatibility with the TO-8 footprint during PCB layout.

Part Context

The A77 belongs to MACOM's line of RF amplifiers designed for broad frequency coverage. It complements other models like the A77-1 and SMA77, which offer similar performance in different packages. The series emphasizes reliability through thin-film technology. This component serves as a foundational building block for cascaded amplifier chains in wireless infrastructure.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Variants such as A77-1 or SMA77 exist but require verification of package and connector differences.