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ADS5400IPZP Datasheet(PDF) 43 Page - Texas Instruments |
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ADS5400IPZP Datasheet(HTML) 43 Page - Texas Instruments |
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43 / 58 page  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 SLAS611C – OCTOBER 2009 – REVISED JANUARY 2016 9 Power Supply Recommendations 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 40 were obtained without bulk supply decoupling capacitors. When bulk (0.1 μF) 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 40. PSRR versus Supply Injected Frequency Copyright © 2009–2016, Texas Instruments Incorporated Submit Documentation Feedback 43 Product Folder Links: ADS5400 |
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