High dynamic range 10 GHz RMS detector offers accurate RF power measurement
June 16, 2010 // Paul Buckley
Linear Technology has introduced a high dynamic range 10 GHz RMS detector that claims to set a new standard in measurement accuracy of RF signals.
From -40 to 85 degrees C, the LTC5582 can deliver 48 dB of dynamic range with a linearity accuracy of 1 dB. This enables use of the LTC5582 in rugged environments such as RRUs (Remote Radio Units) or ODU (Outdoor Units) deployed on cellular towers with minimal calibration adjustments. Moreover, the device has on-chip provisions for first- and second-order temperature compensation which can be easily calibrated for improved temperature performance.
The LTC5582 has a log-linear response which precisely converts the RF signal levels in dB scale into a linearly proportional DC voltage. Operating in the wireless network frequency range from 450 MHz to 2.7 GHz, the detector response maintains the industry's most constant slope as the signal frequency changes. This allows a single detector to operate in multiband environments with minimal calibration adjustments. Moreover, the LTC5582 has fast settling characteristics, acquiring a rising signal accurately in 500 ns and a falling signal in 4.5 s. Its fast response supports a wide range of signal envelope tracking applications. All news
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