The DC output voltage of the LTC5597 RMS Power Detector (0.1-70GHz) is an accurate representation of the average signal power applied to the RF input. The response is linear-in-dB with 28.5mV/dB logarithmic slope over a 35dB dynamic range with typically better than ±1dB accuracy. This device is particularly suited for measurement of waveforms with crest factor (CF) as high as 12dB and waveforms that exhibit a significant variation of the crest factor during 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.
The Linear Technology / Analog Devices LTC5597 RMS Power Detector is available in a compact 8-pin Dual Flat No-Lead (DFN) package, ideal for space-constrained applications.