Datasheet

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ADAU1701 Data Sheet

Rev. C | Page 48 of 52

LAYOUT RECOMMENDATIONS

PARTS PLACEMENT

The ADC input voltage-to-current resistors and the ADC current

set resistor should be placed as close as possible to the 2, 3, and

4 input pins.

All 100 nF bypass capacitors, which are recommended for every

analog, digital, and PLL power/ground pair, should be placed as

close as possible to the ADAU1701. The 3.3 V and 1.8 V signals

on the board should also each be bypassed with a single bulk

capacitor (10 μF to 47 μF).

All traces in the crystal oscillator circuit (Figure 14) should be

kept as short as possible to minimize stray capacitance. In addition,

avoid long board traces connected to any of these components

because such traces may affect crystal startup and operation.

GROUNDING

A single ground plane should be used in the application layout.

Components in an analog signal path should be placed away

from digital signals.

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