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ADS5400IPZP データシート(PDF) 39 Page - Texas Instruments

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部品番号 ADS5400IPZP
部品情報  12-Bit, 1-GSPS Analog-to-Digital Converter
PDF  50 Pages
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI - Texas Instruments

ADS5400IPZP データシート(HTML) 39 Page - Texas Instruments

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Frequency − MHz
0
10
20
30
40
50
60
70
80
90
100
G022
0.01
0.1
1
100
10
DVDD3
AVDD3
AVDD5
ADS5400
www.ti.com
SLAS611B – OCT 2009 – REVISED MARCH 2010
Power Supplies
The ADS5400 uses three power supplies. For the analog portion of the design, a 5-V and 3.3-V supply (AVDD5
and AVDD3) are used, while the digital portion uses a 3.3-V supply (DVDD3). The use of low-noise power
supplies with adequate decoupling is recommended. Linear supplies are preferred to switched supplies; switched
supplies generate more noise components that can be coupled to the ADS5400. The PSRR value and the plot
shown in Figure 38 were obtained without bulk supply decoupling capacitors. When bulk (0.1 mF) decoupling
capacitors are used, the board-level PSRR is much higher than the stated value for the ADC. The power
consumption of the ADS5400 does not change substantially over clock rate or input frequency as a result of the
architecture and process.
Figure 38. PSRR versus Supply Injected Frequency
Copyright © 2009–2010, Texas Instruments Incorporated
39
Product Folder Link(s): ADS5400



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