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ADAU1772 PGA 10 dB Gain Boost?

Question asked by ccyao on Jun 17, 2013
Latest reply on Jun 19, 2013 by BillJ

The ADAU1772 datasheet says that "The optional 10 dB PGA boost set in PGA_x_BOOST does not

affect the input impedance. This is an alternative way of increasing gain without decreasing input impedance;

however, it causes some degradation in performance."

 

What does the "degradation in performance" mean?

 

I tried to enable the 10 dB PGA boost, but got a really weird issue.

It is obvious that crosstalk occurs between ADCs when the 10 dB PGA boost is enabled.

 

Is it the so-called "degradation in performance"?

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