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EVAL-AD8333 no amplification

Question asked by haguiar on Feb 2, 2018
Latest reply on Apr 5, 2018 by George.Kadziolka

Hi all,

 

I am testing a EVAL-AD8333. As I understood, the evaluation board has a pre-amp (AD8332) before the demodulator stage (AD8333), which is followed by further amplification (AD8021). I ordered this as in the website is written "The board is shipped fully assembled and tested and is signal ready. A pair of AD8332 low-noise amplifiers (LNA) provide input matching and amplification for the differential input of the AD8333."

 

However, there is no amplification in the oscilloscope. I noticed that the AD8332 "Gain Control Voltage" is connected to ground, so I wonder if this is the reason why there is no amplification.

 

Thanks for any feedback on that,

 

H

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