AD9954SLASHPCBZ datasheet(25/28 Pages) AD

部件名	AD9954/PCBZ

功能描述	400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer

PDF	28 Pages

Scroll/Zoom	100%

制造商	AD [Analog Devices]

网页	http://www.analog.com

标志

25 / 28 page

AD9952

Rev. B | Page 25 of 28

LAYOUT CONSIDERATIONS

For the best performance, the following layout guidelines

should be observed. Always provide the analog power supply

(AVDD) and the digital power supply (DVDD) on separate

supplies, even if just from two different voltage regulators

driven by a common supply. Likewise, the ground connections

(AGND, 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

the supply pin 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, 10 µF) placed further away from the actual supply source

works best.

AD9954/PCBZ 数据表(PDF) 25 Page - Analog Devices