Vector multiplier spans IF and RF ranges

Analog Devices has expanded its family of RF ICs with the industry’s first two-channel vector multiplier for gain and phase control applications.

The two-channel ADL5390 vector multiplier can replace as many as six discrete components previously required for gain and phase control in wireless infrastructure equipment.

The device is particularly suited for last-mile broadband connections like LMDS (local multipoint distribution service) WLL (wireless local loop) and cellular infrastructure equipment for GSM, W-CDMA and CDMA2000.

By operating over a 10-MHz to 2.7-GHz input frequency range, the ADL5390 provides developers of wireless infrastructure radio equipment the flexibility to use a single solution for phase and gain control in systems operating in either the RF (radio frequency) or IF (intermediate frequency) bands.

The device accepts two input signals, which are summed together at the output.

A broadband Cartesian (I/Q) interface enables the user to adjust each channel.

If the two input signals are applied in quadrature, the ADL5390 will enable simultaneous gain and full 360-degree continuous phase control, allowing replacement of discrete amplitude and phase shifters.

If two independent input signals are applied, then the ADL5390 can combine channels or switch from one channel to another, a useful feature within a diversity radio transceiver application.

Available in sample quantities now, volume production is expected in early 2005. The device is offered in a 4 mm × 4 mm, 24-pin LFCSP (lead-frame chip-scale package) and operates at full specification over a -40 degrees Celsius to +85 degrees Celsius temperature range.

The ADL5390 is priced at $7.50 per unit in 1,000-unit quantities.

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