RF Micro Devices offers the RF2483, a revolutionary multiband direct quadrature modulator IC. Featuring a very low noise floor and the inclusion of gain control, the RF2483 is the first of several products planned by RFMD aimed at fulfilling direct conversion radio architectures.
"The development of the RF2483 represents a significant milestone in realising cost-effective, multimode handsets, basestations and other wireless devices," said Alastair Upton, RFMD Director of digital cellular products. "By eliminating all intermediate frequencies, the direct-modulator approach significantly reduces the transmit architecture complexity, allowing for multimode, multistandard operation with virtually no RF filters."
"The key to the RF2483 is its very low noise floor performance of -157 dBm/Hz at 20 MHz offset," said Brent Wilkins, RFMD Marketing Manager for digital cellular products. "Such a low noise floor allows for the elimination of filters which results in lower power consumption and savings in both cost and board area. RFMD's proprietary design approach helps achieve an extremely high level of performance and represents the best-in-class for this type of component."
In addition to low noise, the RF2483 exhibits carrier and sideband suppression, typically greater than 40 dBc at maximum gain while maintaining 50 MHz input bandwidth and output IP3 of +19 dBm. The device has a 35 dB gain control function which helps the systems designer manage gain, noise and distortion budgets in the transmit path. Other features include a 2,7 V power supply and 700-1000/1700-2200 MHz output frequency range.
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