By Analog Devices Inc 53
The LTC5596, from Linear Technology, is a high-accuracy RMS power detector that provides a very-wide RF input bandwidth from 100 MHz up to 40 GHz. This makes the device suitable for a wide range of RF and microwave applications, such as point-to-point microwave links, instrumentation, and power-control applications.
The DC output voltage of the detector is an accurate representation of the average signal power applied to the RF input. The response is linear-in-dB with a 29 mV/dB logarithmic slope over a 35 dB dynamic range with typically better than ±1 dB accuracy. The detector is particularly suited for measurement of waveforms with crest factor (CF) as high as 12 dB and waveforms that exhibit a significant variation of the crest factor during the measurement.
To achieve higher accuracy and lower output ripple, the averaging bandwidth can be externally adjusted by a capacitor connected between the FLTR and OUT pins. The enable interface switches the device between active measurement mode and a low-power shutdown mode.
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Video: LTC5596 35GHz RMS Detector Breaks Through Dynamic Range Barrier