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Why do we need capacitor between input channels on AD7194?

Question asked by scaruel on Nov 29, 2012
Latest reply on Dec 4, 2012 by MaryMc

In the AD7194 datasheet on page 52 is stated that:

"Connect an R-C filter to each analog input pin to provide rejection at the modulator sampling frequency. A 100 Ω resistor in series with each analog input, a 0.1 μF capacitor between the analog input pins, and a 0.01 μF capacitor from each analog input to AGND are advised."


I don't understand the role of this 0.1 uF cap between adjacent channels.

Can someone help?


Thanks, Simon