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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD9954/PCBZ1 датащи(PDF) 32 Page - Analog Devices |
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AD9954/PCBZ1 датащи(HTML) 32 Page - Analog Devices |
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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. |
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