HMC479ST89TR

Overview

The HMC479ST89TR is a SiGe HBT gain block amplifier from Analog Devices Inc., designed for broadband RF applications. It operates within a frequency range of 0 Hz to 5 GHz and is housed in an SOT-89 surface-mount package. The device provides high linearity with a P1dB compression point of 22 dBm and a third-order intercept point (OIP3) of 36 dBm. It delivers a typical gain of 21.5 dB with a noise figure of 3.8 dB. Power consumption requires a supply voltage of 8 V to 12 V, drawing approximately 110 mA. This component is suitable for cellular, CATV, and general-purpose RF signal chain implementations.

Feature Summary

• Utilizes Silicon Germanium Heterojunction Bipolar Transistor (SiGe HBT) technology for robust performance
• Provides broadband amplification across a wide frequency spectrum from DC to 5 GHz
• Delivers high output linearity suitable for complex modulation schemes
• Features low noise characteristics for sensitive receiver front-end stages

Applications

• Cellular infrastructure base stations
• CATV distribution systems
• General-purpose RF signal chains
• Test and measurement equipment

Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging when sourcing. Confirm the manufacturer part number matches exactly, as Analog Devices may offer variants like 'HMC479ST89E'. Check current lifecycle status, as this component has been subject to End-of-Life notices. Ensure compatibility with standard SOT-89 footprints during PCB layout verification.

Selection Notes

Select this component when a broadband gain block covering DC to 5 GHz is required. It is appropriate for designs needing moderate power handling with 22 dBm P1dB. Consider the 110 mA supply current for power budget calculations. Compare against lower-frequency alternatives if the application does not require the full 5 GHz bandwidth. Verify that the SOT-89 package fits the available board space constraints.

Part Context

This part belongs to the HMC4xx series of SiGe MMICs from Analog Devices. These components are engineered for cost-effective integration into wireless communication systems. The ST89 designation refers to the specific SOT-89 surface-mount package variant. The series is known for providing reliable gain and linearity in compact form factors for RF engineers designing mobile and broadcast hardware.

Replacement Considerations

Publicly confirmed substitute part numbers for this specific component were not identified in the provided documentation. Users should consult official Analog Devices resources for current obsolescence management or direct replacements.