HMC481ST89ETR

Overview

The HMC481ST89ETR is a SiGe HBT gain block MMIC amplifier from Analog Devices Inc., operating from DC to 5 GHz in an SOT-89 package. It provides 20 dB typical gain with a noise figure of 3.5 dB and a P1dB of 20 dBm. The device requires a supply voltage between 6 V and 12 V and draws 74 mA. Designed for surface mount installation, it supports applications including cellular, WLAN, CATV, and microwave radio systems.

Feature Summary

• Utilizes Silicon Germanium Heterojunction Bipolar Transistor (SiGe HBT) technology for high-performance amplification
• Provides broadband coverage from DC to 5 GHz within a compact SMT footprint
• Functions as an ideal RF/IF gain block or driver stage for various wireless communication systems

Applications

• Cellular / PCS / 3G base stations and handsets
• Fixed Wireless Access and WLAN infrastructure
• CATV, Cable Modem, and DBS signal processing
• Microwave Radio links and test equipment

Procurement Notes

Verify component authenticity through authorized distributors due to End-of-Life status. Confirm package integrity and pin alignment against the official datasheet specifications. Ensure compatibility with existing PCB layouts designed for the SOT-89 form factor. Review replacement options such as the HMC481MP86ETR if packaging changes are acceptable. Validate all electrical parameters against current design requirements before integration.

Selection Notes

Select this component for designs requiring wideband amplification up to 5 GHz with moderate power output. The SOT-89 package offers a balance between thermal performance and board space efficiency. Consider the 6 V to 12 V supply range when designing power management circuits. Evaluate the 20 dBm P1dB capability against system linearity requirements. Compare noise figure specifications against other gain blocks if low-noise performance is critical.

Part Context

This part belongs to the HMC481 series of SiGe HBT MMICs, which includes variants like the HMC481MP86ETR. These devices are engineered for general-purpose RF amplification tasks. The series emphasizes ease of use with internal matching networks. Analog Devices positions these components within their interactive RF signal chain portfolio for IoT and wireless applications.

Replacement Considerations

Public confirmed substitute: HMC481MP86ETR. This alternative shares the same core functionality but utilizes a Micro-P (SOT-86) package instead of SOT-89. Verify mechanical fit and pinout compatibility before substitution.