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AD8361 dynamic range

Question asked by ku637 on Dec 11, 2011
Latest reply on Dec 16, 2011 by CarlosC

Hi,

 

Im a novice in RF.Im trying to use RMS detector AD8361.

 

my operating conditions are like Vs=5V,freq=500MHz.CW,ref 50Ohm impedance.

 

Im confused about dynamic range specified in datasheet..

The datasheet specifies a dynamic range of 30dB with +/- 2dB error in detection for Vs =5V.

 

It also specifies that the linear response upper limit is 9.4dBm for Vs=5V & ref 50Ohm impedance.

 

So does it translates that with +/-2dB error i can detect power of inpout signals from 9.4dBm to -20.6dBm.??

 

Am i right in saying so..or is my understanding is not correct...

 

Thanks for any help,

 

Im also attaching my test results which shows great deviations after -22dBm ( my input signal range was from 0 to -27dBm)ad8361.jpg

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