The AD8363 is a true RMS responding power detector that has more than 50 dB measurement range when driven with a single-ended 50 source. The device provides a solution in a variety of high frequency communication systems, and in instrumentation, requiring an accurate response to signal power. The AD8363 is easy to use with its single-ended 50 input, only requiring a single 5 V supply, and a few capacitors. The AD8363 can operate from arbitrarily low frequencies to 6 GHz and can accept inputs that have RMS values from less than -50 dBm to at least 0 dBm, with large crest factors, exceeding the requirements for accurate measurement of WiMAX, WCDMA, and CDMA signals.