Sunnyvale, Calif.Maxim Integrated Products has 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, the MAX19998 delivers a combination of high linearity, noise performance, and component integration over a 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.
The MAX19998 offers a 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 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 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 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%, according to Maxim.
The MAX19998 is packaged in a compact, 5mm x 5mm, 20-pin TQFN.
Pricing: Starts at $6.90 (1000-up, FOB USA).
Datasheet: Click here.
Maxim Integrated Products, www.maxim-ic.com