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RF ICs designed for multi-band base stations, PtP radios

Posted: 06 Jun 2014     Print Version  Bookmark and Share

Keywords:Analog Devices  multi-band base station  PtP radio  modulator  demodulator 

Analog Devices Inc. has unleashed a line of highly integrated RF ICs that the company said greatly simplifies the design and cuts the development cost of multi-band base stations and point-to-point (PtP) radios. The devices include the ADRF6720 I/Q modulator, ADRF6820 I/Q demodulator and ADRF6612 dual-mixer.

The highly integrated devices enable the design of base station and high-performance radios requiring multi-band support, high dynamic range and wide channel bandwidths. The products are geared for designs for 3G/4G communication, microwave PtP radios, military/aerospace and instrumentation applications. The devices feature an embedded low phase noise synthesiser, RF switch and balun, digital step attenuator (DSA) and programmable linearity optimisation.


The ADRF6720 is a 700MHz to 3GHz quadrature modulator integrated with a low-phase-noise synthesiser and output RF balun. This modulator is intended for multi-band, high-performance transmit solutions for base stations, PtP radio and high-dynamic-range radios enabling channel bandwidths up to 1GHz. The ADRF6720 also features digital programmability for image rejection and carrier feed-through correction as well as linearity optimisation.

The ADRF6820 is a 695MHz to 2.7GHz I/Q demodulator integrated with a low-phase-noise synthesiser, a 2:1 input RF switch, tunable RF balun and RF DSA. The integrated demodulator is geared for use as an observation receiver and direct conversion receiver in wireless infrastructure applications. Additional features include digital programmability for linearity optimisation and I/Q phase and gain mismatch correction.

The ADRF6612 is a wideband, dual-channel RF down-converter with an integrated IF amplifier, programmable RF balun and low-phase-noise synthesiser. The device is fully specified to operate from 700MHz to 2.7GHz. This wideband, high-linearity mixer is designed for dual-channel main and diversity receivers commonly used in 3G/4G wireless infrastructure applications. High input linearity and low noise enable the ADRF6612 to be used in applications where in-band blocking signals may degrade dynamic range. In addition, the noise figure under blocking condition performance is competitive compared to existing narrowband passive mixers.

Samples of the devices are available. The ADRF6720 is available in 6 x 6mm 40-lead LFCSP package and can be had for $6.80 each for 1,000 units. The ADRF6820 is available in 6 x 6mm 40-lead LFCSP package and can be had for $10.99 each for 1,000 units. The ADRF6612 is available in 7 x 7mm 48-lead LFCSP package and can be had for $14.99 each for 1,000 units.

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