MAX19998: Highest linearity, SiGe downconverting mixer for LTE, WiMAX, and MMDS base stations

Additionally, the MAX19998 offers an industry-best 2RF - 2LO spurious rejection of 67dBc for an RF level of -10dBm, and 62dBc for a level of -5dBm. This device is designed specifically for 4G wireless-infrastructure applications in which high linearity and a low noise figure are critical for enhanced receiver sensitivity and blocker immunity. The device supports both high- and low-side LO injection architectures for 3.1GHz to 3.9GHz LTE and WiMAX(TM) base stations; the MAX19998 can also be configured for 2.3GHz to 2.9GHz LTE, WiMAX, and MMDS high-side LO injection architectures.

As a complete SiGe downconverter, the MAX19998 integrates a state-of-the-art mixer core, two amplifiers, two baluns, and dozens of discrete components. The device's 8.7dB conversion gain enables the elimination of a complete IF amplifier stage within the receiver lineup. The MAX19998's outstanding 2RF - 2LO performance can also ease the filtering requirements of close-in harmonics, thus leading to simpler, more cost-effective filter designs. Through this combination of integration and performance, the device reduces downconverter solution size by a factor of 2x, and the discrete part count by 34%.