Maxim has introduced the MAX19985A 700MHz to 1GHz, dual down-conversion mixer that integrates an LO switch, buffer, and splitter.

Designed using the firm's SiGe process, the monolithic chip provides two independent down-conversion channels, each with a +25.5dBm (typ) IIP3, 8.7dB (typ) conversion gain, and 9.0dB (typ) noise figure.

It also offers 2LO-2RF spurious rejection of 76dBc for an RF level of -10dBm, and 71dBc for a level of -5dBm.

The chip is designed specifically for 2.5/3/4G wireless-infrastructure applications with high linearity and low noise figure requirements - so LTE, WiMax, GSM/Edge, WCDMA, and cdma2000 base stations.

On-chip are two cores; four amplifiers; three baluns; an LO switch, buffer, and splitter; and dozens of discrete components.

"The device's 8.7dB conversion gain enables the elimination of a complete IF amplifier stage within the receiver line-up," said Maxim. "The 2LO-2RF performance can also ease the filtering requirements of close-in harmonics."

The 6x6mm 36pin TQFN is pin-compatible with the MAX19995/19995A series of 1.7 to 2.2GHz dual mixers, and pin-similar to the 19997A/19999 1.85 to 3.9GHz dual mixers.

More information: www.maxim-ic.com