PSA4-5043+
Overview
The PSA4-5043+ is a high-linearity, ultra-low noise E-PHEMT monolithic amplifier designed for wideband applications from 50MHz to 4GHz. It operates on a single 3V or 5V supply and provides a balanced combination of 18.4dB gain and a very low noise figure of 0.75dB at 1GHz. The device is internally matched to 50 ohms, simplifying integration into RF signal chains as a low-noise amplifier or gain block.
Why Choose This Part
This amplifier offers an exceptionally low noise figure of 0.75dB, which is essential for maintaining signal integrity in the first stage of a receiver. Its internal matching to 50 ohms reduces the bill of materials and PCB complexity, while the SOT-343 package provides a compact footprint with high reliability and Class 1B ESD protection.
Applications
Key Specifications
Getting Started
Engineers should follow the recommended PCB layout in the datasheet to maintain 50-ohm impedance and ensure proper grounding of the source pins. Thermal management is achieved through the ground leads, so sufficient copper area should be provided. For initial evaluation, Mini-Circuits offers the TB-358+ evaluation board which includes the necessary DC blocking capacitors and bias-tee components for rapid testing.
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