TQP3M9028 RF amplifier application diagram showing use in wireless receivers transmitters and RF front-end signal chains
The TQP3M9028 RF amplifier is a high-linearity, low noise gain block designed for a broad range of radio frequency applications. Manufactured by Qorvo, this RF component offers excellent performance from 50 MHz up to 4 GHz, making it suitable for wireless communication, receiver/transmitter chains, and high-performance RF systems.
What Is the TQP3M9028 RF Amplifier?
The TQP3M9028 RF amplifier is a compact gain block amplifier in a SOT-89 surface-mount package. It was engineered for applications requiring flat gain, high linearity, and low noise performance across a wide frequency range.
Despite being discontinued by Qorvo with a last-time-buy announced for late 2025, the TQP3M9028 remains widely used in legacy designs and infrastructure equipment.
Key Specifications of TQP3M9028
The following technical specifications highlight the performance characteristics of the TQP3M9028 RF amplifier:
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Frequency Range: 0.05 GHz to 4 GHz, covering HF to early microwave bands.
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Noise Figure: Approximately 2 dB at 1.9 GHz for low-noise signal amplification.
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Gain: Typical 14.7 dB gain ensures good signal amplification with flat response.
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Output Power (P1dB): 20.7 dBm, supporting robust signal levels.
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Output Intercept Point: +40 dBm OIP3, indicating high linearity.
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Supply Voltage: Single supply +5 V, with 85 mA current draw.
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Package: Industry-standard SOT-89 surface mount, enabling easy PCB integration.
These specifications make the TQP3M9028 amplifier ideal for RF front-end stages in communication and measurement systems.
Performance Features
A few performance features distinguish the TQP3M9028 RF amplifier:
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High Linearity: The amplifier maintains signal fidelity even in environments with strong interfering signals, thanks to its high OIP3 rating.
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Low Noise: With its low noise figure, the amplifier supports cleaner signal reception and reduced thermal noise.
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Flat Gain Across Broad Band: The device maintains relatively uniform gain over a large portion of its frequency range, providing consistent amplification from VHF through UHF.
Typical Applications for TQP3M9028
The TQP3M9028 is used across diverse RF and wireless systems, including:
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Wireless Infrastructure: Such as base stations and repeater systems.
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General-Purpose Wireless Devices: Where reliable amplification is needed.
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Receiver/Transmitter Chains: Used as low noise amplifiers and gain blocks in RF signal paths.
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Mobile and Broadband Communications: Supporting LTE/WCDMA and similar standards.
These application scenarios emphasize the versatility of the component in both commercial and defense-related RF systems.
Design and Integration Considerations
Designers integrating the TQP3M9028 RF amplifier should consider a few practical points:
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Biasing and Matching: Proper RF choke placement and bypass capacitors on the +5 V line ensure stable and efficient operation.
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Thermal Stability: Although the amplifier is rated up to ~85 °C, good thermal layout and heat sinking can extend reliability under heavy signal conditions.
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Component Replacement: With its discontinued status, engineering teams should identify suitable replacements such as the suggested TQP3M9038 for new designs.
Sourcing and Supply Chain Notes
Even though Qorvo has announced end-of-life plans for the TQP3M9028, the part can still be sourced through authorized distributors and inventory marketplaces. When procuring legacy RF parts, engineers and buyers should verify authenticity and RoHS compliance to avoid counterfeit components.