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Whether AD8130 will work with 150 Ohm load with the same  linearity performance as in the case of 1Kohm load

Question asked by manas on Sep 23, 2013
Latest reply on Sep 26, 2013 by elc.manas@gmail.com

Dear All,

 

 

I carefully went through AD8129-8130 data sheet.  I am going to use as a differential -to single ended converter buffer with high input impedance which is going to drive Spectrum analyser i.e. 50 Ohm load.
But I couldn't derive any conclusion out of this as they are given under specific test condition which are NOT coming under my test conditions.

My Differential  Peak-to-Peak Swing is- 1.3V
Input Common Mode Voltage:- 0.65V

Signal Band Width ( 3dB) Needed :- 0-3 MHz (only)

My Output Load is :-  >= 150 Ohm ( 50 Ohm of Spectrum Analyzer + 100 Ohm is put in series with the buffer output)
I need a gain:- 1 ( used as a buffer)
So My output peak to peak Swing is approximately :- 1.2V  .

 

Linearity is VERY Important for me.
So whether AD8130 will work with 150 Ohm load with the same  linearity performance as in the case of 1Kohm load. ?

 

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