26.8-dBm IIP3 dual broadband RF mixer draws 300 mW/ch

26.8-dBm IIP3 dual broadband RF mixer draws 300 mW/ch

The LTC5569 dual RF mixer packs a combination of 26.8-dBm IIP3, 300 mW per mixer, and a frequency range of 300 MHz to 4 GHz to address high density footprints of multimode 4G RRH (Remote Radio Head) MIMO (Multiple-Input, Multiple-Output) receivers. The device is claimed to provides best-in-class power consumption while delivering outstanding IIP3 with a conversion gain of 2 dB and a noise figure of 11.7 dB. Noise figure under a 5 dBm blocking is 17 dB.

Additional features include a 44-dB channel isolation and a temperature range from –40° to 105°C. Each channel of the mixer contains an integrated balun transformer at the RF and LO inputs. These ports are single-ended 50-Ω matched, requiring minimal external components. Also, each channel’s LO has separate buffers driven from a common input.

Housed in a 4 x 4-mm QFN package, the part operates from a single 3.3-V supply, drawing a total supply current of 180 mA when both channels are on. Each mixer can be independently shut down with a separate enable control. When disabled, the IC has a maximum of 200-μA leakage current. (From $8.50 ea/1,000 — available now.)

By Christina Nickolas

Linear Technology , Milpitas , CA
Sales Office 408-428-2050
www.linear.com