GENERAL DESCRIPTION
The AD8361 is a mean-respondingpower detectorfor use in highfrequencyreceiver and transmitter signal chains,upto 2.5 GHz.Itis veryeasy toapply.Itrequires a single supplyonly between 2.7 V and 5.5 V,a power supplydecouplingcapacitor, and an input couplingcapacitor in most applications. The output is a linear-responding dc voltage with a conversion gain of 7.5 V/V rms. An external filter capacitor can be added to increase the averaging time constant.

FEATURES
   Calibrated rms response
   Excellent temperature stability
   Up to 30 dB input range at2.5 GHz
   700 mVrms, 10dBm, re 50Ω maximum input
   ±0.25 dB linearresponse up to 2.5 GHz
   Single-supply operation: 2.7 V to 5.5 V
   Low power: 3.3 mW at 3 Vsupply
   Rapid power-down to less than 1 µA

APPLICATIONS
   Measurement of CDMA, W-CDMA, QAM, other complex
      modulation waveforms
   RF transmitter or receiver power measurement