The LTC5566 from Analog Devices is a dual channel down-converting mixer with integrated programmable variable gain IF amplifiers that operates from 300 MHz to 6 GHz. This dual channel mixer has outstanding dynamic range, with Input P1dB of +11.5 dBm and Input IP3 of +25.5 dBm at 3.6 GHz. At higher frequencies, up to 5.8 GHz, its IIP3 sustains more than +24 dBm. The mixer has an integrated IF amplifier that boosts the overall power conversion gain to a maximum of 12 dB. The IF gain of each channel can be programmed in 0.5 dB steps through the SPI. It has outstanding 50 dB channel-to-channel isolation up to 3.6 GHz. At 4.5 GHz, the channel isolation is still 40 dB. Both channels exhibit very low phase shift over the full 15.5 dB attenuation range, critical for MIMO receiver applications. The mixer operates from a single 3.3 V supply. With both channels on, the device draws a nominal supply current of 384 mA. Each mixer can be turned on or off independently with separate control lines. Additionally, a low power mode is available, ensuring operation at a reduced supply current of 294 mA, although with a slight decrease in IP3 performance. It is available in a 5 mm x 5 mm 32-lead plastic QFN package and is ideal for diversity receivers, DAS, SDRs and network test/monitoring equipments. It supports bandwidths up to 400 MHz to meet the needs of the growing sub-6 GHz 5G wireless access equipment.
