The LT5557, a new high linearity, 3.3V, downconverting active RF mixer from Linear Technology elevates receiver dynamic range performance while extending bandwidth capability to cover 3G and WiMAX basestation frequencies to 3.8 GHz. The LT5557 offers 24.7 dBm IIP3, noise figure of 11.7 dB, and 2.9 dB of gain at 1.95 GHz. Its performance remains robust at WiMAX frequencies with 23.5 dBm IIP3, and 1.7 dB of gain at 3.6GHz. This performance is achieved with a low -3dBm LO input drive level, enabling best-in-class LO isolation performance. Typical LO-to-RF isolation is better than 42 dBc at 1.95 GHz. The LT5557's
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