AnsweredAssumed Answered

Single slew ext vol with AUX ADC

Question asked by Philip on Mar 24, 2011
Latest reply on Mar 25, 2011 by BrettG

I am using ADAU1701 and I want ot do a external pot to control the gain though the ADC.

 

My set up is a ADC_In go directly to the orange external control point of the "Single slew ext vol" block.

 

In fact I can control the volumn with a 3.3V almost getting 0dB gain.

 

The problem is with 0V, I get only around -50 db gain, which is not enough to supress the audio pass though the gain block.

 

I am hoping to have more supression when the pot is at 0V

 

Am I missing some block in between the adc and the vol control?

How can I make it?

 

Thanks a lot

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