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Question for AD9824

Question asked by Kaos on Jul 15, 2016
Latest reply on Jul 15, 2016 by JeyasudhaMuthuPerumal

Hi Video Expert,

 

Our customer have confused about the explanation on your datashseet.

 

As for the part of the calculation Gain of VGA setting on AD9824 datasheet rev-0 page-3,

 

On "VARIABLE GAIN AMPLIFIER(VGA)", the value of setting x 0.0359408033826638dB

But on "SYSTEM PERORAMANCE", the value of setting x 0.0353dB

Which is correct?

 

0.0359408033826638dB come from as following

The case of setting value 77 is 2dB

The case of setting value 1023 is 36dB

 

1023-77=946

36dB - 2dB=34dB

 

34dB/946=0.0359408033826638dB

 

Please give us your advice for this.

 

Thanks Kaos

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