Analog Devices’ ADRF6521 is a dual, fully differential, low-noise, low-distortion variable gain amplifier. The high spurious-free dynamic range over the gain range makes it ideal for communication systems with dense constellations, multiple carriers, and nearby interferers. The VGA has a 21 dB attenuation range with a typical voltage gain of 18 dB at 100 Ω input impedance.
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