HMC478ST89

Overview

The HMC478ST89 is a SiGe HBT gain block MMIC amplifier manufactured by Analog Devices Inc. It operates from DC to 4 GHz and is housed in an SOT-89 surface-mount package. Key electrical parameters include a typical gain of 16 dB, a noise figure of 5.0 dB, and a P1dB compression point of 18 dBm. The device requires a supply voltage of 5 V with a typical current consumption of 62 mA. It features an OIP3 of 31 dBm and input return loss of 14 dB. This component is designed for general-purpose RF applications.

Feature Summary

• Utilizes SiGe HBT technology for robust performance
• Provides high linearity with 31 dBm OIP3
• Supports direct coupling in 50 Ohm systems

Applications

• General purpose RF/IF gain stages
• Local oscillator (LO) drivers
• Power amplifier (PA) drivers

Procurement Notes

Verify component authenticity through authorized channels due to End-of-Life status. Confirm package integrity and pin alignment against the official datasheet specifications. Request batch traceability documentation to ensure compliance with quality standards. Validate that the specific suffix matches the required reel or cut-tape configuration for your assembly process.

Selection Notes

Select this component for designs requiring a balance of gain and linearity within the 4 GHz bandwidth. Consider the 5 V supply requirement and 62 mA current draw for power budgeting. Evaluate thermal dissipation capabilities given the SOT-89 package constraints. Compare against alternative SiGe amplifiers if lower noise figures or higher output power are critical for the specific application architecture.

Part Context

This part belongs to the HMC478 series of monolithic microwave integrated circuits. It represents a class of surface-mount amplifiers designed for cost-effective integration into wireless communication systems. The series emphasizes ease of use with internal matching networks, reducing external component count in RF front-end designs.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided data.