GALI-21+
Overview
The GALI-21+ is a wideband Monolithic Microwave Integrated Circuit (MMIC) amplifier based on InGaP Heterojunction Bipolar Transistor (HBT) technology. It operates from DC up to 8 GHz, providing a flat gain of approximately 9 dB and an output power at 1 dB compression (P1dB) of 12.6 dBm. Housed in a compact SOT-89 package with an exposed metal bottom, it is designed for excellent thermal dissipation and high reliability in demanding RF environments.
Why Choose This Part
The GALI-21+ is internally matched to 50 ohms, eliminating the need for external matching components and simplifying PCB design. Its InGaP HBT construction offers high linearity and stable performance across a wide operating temperature range from -45C to +85C. The SOT-89 package with an integrated heat sink allows for low thermal resistance and easier thermal management in compact RF layouts.
Applications
Key Specifications
Getting Started
To implement the GALI-21+, provide a stable DC bias of 3V to 4.1V through a bias tee or an RF choke inductor to the output pin. Ensure the exposed metal paddle is soldered to a large ground plane with multiple thermal vias for proper heat dissipation. Designers should include DC blocking capacitors at both the RF input and RF output ports to prevent DC leakage into adjacent stages.
