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Linear Technology Corporation introduces a high linearity direct conversion I/Q demodulator, which significantly reduces the cost of 3G and WiMAX base-station receivers. The LT5575’s extended operating frequency range from 800 MHz to 2.7 GHz covers all of the cellular and 3G infrastructure, WiMAX and RFID bands with a single part. Its capability to convert from RF directly to baseband at DC or low frequency results in simplified receiver designs, reduced component count and use of lower cost, low frequency components. The LT5575 offers an outstanding IIP3 of 28 dBm and IIP2 of 54.1 dBm at 900 MHz and an IIP3 of 22.6 dBm and IIP2 of 60dBm at 1.9 GHz. Moreover, the device has a conversion gain of 3 dB, which when combined with a DSB Noise Figure of 12.7 dB produces excellent receiver dynamic range. The device’s I (In-phase) and Q (Quadrature phase) outputs have typical amplitude and phase matching of 0.04 dB and 0.6° respectively, providing an unprecedented level of demodulation accuracy.