HMC478ST89E

Overview

The HMC478ST89E is a SiGe HBT gain block MMIC amplifier from Analog Devices Inc., designed for surface-mount applications in the SOT-89 package. It operates over a frequency range of DC to 4 GHz with a typical gain of 22 dB and a noise figure between 3 dB and 4 dB. The device delivers a P1dB compression point of 18 dBm and requires a supply voltage ranging from 5 V to 8 V.

Feature Summary

• Utilizes Silicon Germanium (SiGe) Heterojunction Bipolar Transistor technology for high-performance RF amplification
• Provides broadband operation covering DC to 4 GHz frequency range
• Engineered as a compact surface-mount gain block suitable for space-constrained designs

Applications

• General purpose RF signal chain amplification
• Wireless communication systems requiring broadband gain
• Test and measurement equipment front-end stages

Procurement Notes

Verify component authenticity through authorized channels due to potential availability constraints. Confirm that the specific suffix E denotes compliance status if required by your design specifications. Ensure proper handling procedures are followed during assembly to maintain signal integrity and device reliability in final applications.

Selection Notes

Select this component when a wide bandwidth up to 4 GHz is required alongside moderate output power capabilities. The SOT-89 package offers a balance between performance and footprint size. Consider the 5 V to 8 V supply range compatibility with existing system power rails before integration into the circuit design.

Part Context

This part belongs to the HMC478 series of SiGe HBT gain block amplifiers manufactured by Analog Devices Inc. It shares architectural similarities with other models in the family but is distinguished by its specific frequency coverage and packaging configuration, targeting general-purpose RF applications within the microwave spectrum.

Replacement Considerations

Direct substitutes include HMC478MP86 and HMC478SC70, which offer similar functional characteristics. Verify pinout compatibility and thermal requirements when transitioning between different package types within the same product family.