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Question on analog in scaling with sample freq

Question asked by ScottM on Jan 14, 2010
Latest reply on Jan 21, 2010 by JeradL

Designing an adau1701 product.  Hopefully an easy one here:  Want to support 44.1, 48, and 96K sample rates (using an external MCLK source), with the same input sensitivity.  The spec says to scale ADC_RES and ADCx resistor by frequency.  But each scale by the same factor, therefore as frequency changes the input scaling should be the same?  Can someone offer some wizdom here.  Looks to me no change is needed.  Design for 44.1K @ 100uA.   Maybe lose of a couple dB's SNR @ 96K?

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