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LNAs for pico, femtocells

Low noise figures, high gain and low current boost receiver sensitivity

Avago Technologies designed its latest family of MMIC (monolithic microwave IC) low noise amplifiers (LNAs) for cellular and WiMAX infrastructure applications. The MGA-12516, 13516 and 14516 occupy 4.0 x 4.0 x 0.85 mm 16-pin quad-flat-non-lead (QFN) packages. MGA-12516 is a matched-pair balanced LNA designed to operate between 800 MHz to 3 GHz. At 4V and 50 mA per LNA, the MGA-12516 has 0.62 dB noise figure, 23.8 dB gain, 33.5 dBm OIP3 and 17.9 dBm P1dB at 1.95 GHz. The MGA-13516 and MGA-14516 are two-stage LNAs with built-in active bias circuitry and the ability to adjust the supply current and gain through external matching without affecting the noise figure. MGA-13516 operates over 400 MHZ to 1.5 GHz, while the MGA-14516 is designed for 1.4 GHz to 2.7 GHz. At 5V and 155 mA, the MGA-13516 achieves 0.66 dB noise figure, 31 dB gain, 38 dBm OIP3 and 24 dBm P1dB at 900 MHz. The MeGA-14516 delivers 0.68 dB noise figure, 33dB gain, 38 dBm OPI3 and 24 dBm P1dB at 1.95 GHz.