I/Q Modulator Operates Up To 2.5 GHz

Analog Devices Inc. (Norwood, MA) has expanded its RF product portfolio with the introduction of a direct quadrature modulation IC for wireless communications systems operating up to 2.5 GHz. By operating up to 2.5 GHz, the AD8346 is a good solution for cellular/PCS base stations, wireless local loop (WLL) systems, satellite applications, and radio links.

The AD8346 performs direct RF in-phase/quadrature (I/Q) modulation in digital transmitters. By offering this capability, the new IC allows designers to eliminate the IF stage in a transmitter circuit and, in turn, reduce the overall pin count in a wireless system.

The new modulator operates from 800 to 2500 MHz, covering the major cellular and ISM bands. It interfaces easily with Analog Devices' TxDAC family of digital-to-analog (D/A) converters, providing a two-chip digital-to-RF transmitter solution.

The AD8346 is available in a 16-lead TSSOP package and is specified to operate over the +2.7 to +5.5 VDC supply voltage range. The device, fabricated on Analog Devices' 2.5 GHz bipolar silicon process, is available now and sells for $4.96 in 1,000-piece quantities.