ADCS7476, ADCS7477, ADCS7478

SNAS192F – APRIL 2003 – REVISED MARCH 2013

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The analog input should be isolated from noisy signal lines to avoid coupling of spurious signals into the input.

Any external component (e.g., a filter capacitor) connected between the converter’s input pins and ground or to

the reference input pin and ground should be connected to a very clean point in the ground plane.

We recommend the use of a single, uniform ground plane and the use of split power planes. The power planes

should be located within the same board layer. All analog circuitry (input amplifiers, filters, reference

components, etc.) should be placed over the analog power plane. All digital circuitry and I/O lines should be

placed over the digital power plane. Furthermore, all components in the reference circuitry and the input signal

chain that are connected to ground should be connected together with short traces and enter the analog ground

plane at a single, quiet point.

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