MAX19998: Highest linearity, SiGe downconverting mixer for LTE, WiMAX, and MMDS base stations
Maxim introduced the MAX19998, a fully integrated, 2300MHz to 4000MHz, downconverting mixer with an on-chip LO buffer. Designed using Maxim's proprietary monolithic SiGe BiCMOS process, this device delivers an unparalleled combination of linearity, noise performance, and component integration over an exceptionally wide band of operation. A single IC provides a fully integrated downconversion channel, with 24.3dBm (typ) of IIP3, 8.7dB (typ) of conversion gain, and a 9.7dB (typ) noise figure.Addi
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%.