AD9954SLASHPCBZ1 datasheet(32/40 Pages) AD

No de pièce	AD9954/PCBZ1

Description	400 MSPS, 14-Bit, 1.8 V CMOS, Direct Digital Synthesizer

PDF	40 Pages

Scroll/Zoom	100%

Fabricant	AD [Analog Devices]

Site Internet	http://www.analog.com

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32 / 40 page

AD9954

Rev. B | Page 32 of 40

LAYOUT CONSIDERATIONS

For the best performance, the following layout guidelines

should be observed. Always separate the analog power supply

(AVDD) and the digital power supply (DVDD), even if just

from two different voltage regulators driven by a common

supply. Likewise, the ground connections (AGND and DGND)

should be kept separate as far back to the source as possible (for

example, separate the ground planes on a localized board, even

if the grounds connect to a common point in the system).

Bypass capacitors should be placed as close to device pins as

possible. Usually a multitiered bypassing scheme consisting of a

small high frequency capacitor (100 pF) placed close to the

supply pin and progressively larger capacitors (0.1 μF and 10 μF)

further back to the actual supply source works best.

AD9954/PCBZ1 Fiches technique(PDF) 32 Page - Analog Devices