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DAC11001APFBT Datasheet(PDF) 35 Page - Texas Instruments |
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DAC11001APFBT Datasheet(HTML) 35 Page - Texas Instruments |
35 / 42 page 10 …F 1 …F VCC 10 Ferrite bea d 15V + ± 10 …F 1 …F VSS 10 15V 10 …F 1 …F AVDD 10 5V + ± Ferrite bea d 0.1 …F DGND DVDD 10 …F 0.1 …F DGND IOVDD 3.3V + ± DGND AGND AGND AGND AGND AGND AGND 35 DAC11001A, DAC91001, DAC81001 www.ti.com SLASEL0 – OCTOBER 2019 Product Folder Links: DAC11001A DAC91001 DAC81001 Submit Documentation Feedback Copyright © 2019, Texas Instruments Incorporated Power-supply bypassing and decoupling is key to keep power supply noise, switching transients, and common- mode currents away from the DAC output. There are three main objective of power-supply bypassing: • Filtering: Filter out noise and ripple from power supplies • Bypassing: Supply switching or load transient currents locally by avoiding trace inductances • Decoupling: Stop local transient currents from impacting other circuits To achieve these objectives, use the following 3-element scheme. Place a decoupling capacitor close to every power supply pin to provide the local current path for load and circuit switching transients. This capacitor must be referenced to the respective load ground for best load transient suppression. Use a 0.1-µF to 1-µF, X7R, multilayer ceramic capacitor (MLCC) for this purpose. For analog power supplies, a 10-Ω series resistor provides the best decoupling. For filtering the power supply noise and ripple, 10-µF capacitors work best when placed at the power entry point of the board. An example decoupling scheme is shown in Figure 28. Figure 28. Power-Supply Decoupling |
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