The HMC421QS16 is a high linearity down-converter receiver IC suitiable for PCS/UMTS infrastructure applications. The receiver IC is designed to support UMTS applications where a high third order intercept point (OIP3) is required. A passive mixer coupled with a high dynamic range IF amplifier achieves an Input IP3 of +19 dBm. The converter provides a gain of 8 dB and 9 dB typical single side band noise. The IC operates from positive +5V rails and consumes 60 mA of current. The design requires no external Baluns. The mixer supports IF frequencies between 50 MHz and 300 MHz.