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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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DM385 датащи(PDF) 135 Page - Texas Instruments |
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DM385 датащи(HTML) 135 Page - Texas Instruments |
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135 / 281 page  CVDD_x CVDD 8 3.3 V Supplies V Delta (A) 1.8 V Supplies (Excluding DVDD_DDR[x]) 7 1.35 V/1.5 V/1.8 V DVDD_DDR[0] CVDD, CVDD_x 3.3 V Supplies (DVDD, DVDD_x, DVDD_C, VDDA_x_3P3) 1.8 V Supplies (DVDD, DVDD_x, VDDA_x_1P8, VDDA_1P8) 6 5 DM385, DM388 www.ti.com SPRS821D – MARCH 2013 – REVISED DECEMBER 2013 Figure 7-2. Power-Down Sequence A. V Delta Max = 2 V. Figure 7-3. 3.3 V Supplies Falling After 1.8 V Supplies Delta Figure 7-4. CVDD and CVDD_x Power-Down Sequence 7.2.9 Power-Supply Decoupling 7.2.9.1 Analog and PLL PLL and Analog supplies benefit from filters or ferrite beads to keep the noise from causing problems. The minimum recommendation is a ferrite bead along with at least one capacitor on the device side of the bead. An additional recommendation is to add one capacitor just before the bead to form a Pi filter. The filter needs to be as close as possible to the device pin, with the device side capacitor being the most important component to be close to the device pin. PLL pins close together can be combined on the same supply, but analog pins should all have their own filters. PLL pins farther away from each other may need their own filtered supply. Copyright © 2013, Texas Instruments Incorporated Power, Reset, Clocking, and Interrupts 135 Submit Documentation Feedback Product Folder Links: DM385 DM388 |
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