HMC478ST89ETR

Overview

The HMC478ST89ETR is a SiGe HBT gain block MMIC amplifier from Analog Devices Inc., designed for surface-mount applications. It operates across a frequency range of DC to 4 GHz, housed in an SOT-89 package. The device provides a typical gain of 16 dB with a noise figure of 3.5 dB. It requires an 8 V supply voltage and draws 110 mA of current. Key performance metrics include a P1dB compression point of 22 dBm and an OIP3 of 36 dBm. The component supports operation temperatures from -40°C to +85°C.

Feature Summary

• Utilizes Silicon Germanium Heterojunction Bipolar Transistor technology for high-performance RF amplification
• Provides broadband coverage from DC to 4 GHz in a compact surface-mount package
• Integrates high linearity and low noise characteristics suitable for signal chain integrity

Applications

• General purpose RF signal amplification
• Wireless communication infrastructure components
• Test and measurement equipment front-ends

Procurement Notes

Verify the specific suffix ST89ETR against official Analog Devices documentation to confirm the tape-and-reel packaging configuration. Confirm that the part number matches the exact electrical specifications required for your design, as minor variations may exist between similar model numbers within the HMC series. Ensure compatibility with the specified 8V supply and thermal requirements before finalizing procurement orders.

Selection Notes

Select this component when a broadband DC-to-4 GHz amplifier with moderate gain and high linearity is required in a small form factor. The SiGe HBT technology offers a balance of performance and power consumption. Consider the SOT-89 package constraints for PCB layout and thermal management. Verify that the 110 mA supply current fits within the system's power budget and that the 8V operating voltage aligns with available rails.

Part Context

This part belongs to the HMC478 family of SiGe HBT gain block amplifiers manufactured by Analog Devices Inc. These monolithic microwave integrated circuits are engineered for robust performance in demanding RF environments. The ST89 variant specifically denotes the SOT-89 surface-mount package option, facilitating automated assembly and space-constrained designs compared to larger through-hole alternatives.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.