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TMS320C6414T Datasheet(PDF) 73 Page - Texas Instruments |
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TMS320C6414T Datasheet(HTML) 73 Page - Texas Instruments |
73 / 142 page TMS320C6414T, TMS320C6415T, TMS320C6416T FIXEDPOINT DIGITAL SIGNAL PROCESSORS SPRS226L − NOVEMBER 2003 − REVISED FEBRUARY 2008 73 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 DVDD CVDD VSS C6000 DSP Schottky Diode I/O Supply Core Supply GND Figure 11. Schottky Diode Diagram Core and I/O supply voltage regulators should be located close to the DSP (or DSP array) to minimize inductance and resistance in the power delivery path. Additionally, when designing for high-performance applications utilizing the C6000 platform of DSPs, the PC board should include separate power planes for core, I/O, and ground, all bypassed with high-quality low-ESL/ESR capacitors. power-supply decoupling In order to properly decouple the supply planes from system noise, place as many capacitors (caps) as possible close to the DSP. Assuming 0603 caps, the user should be able to fit a total of 60 caps, 30 for the core supply and 30 for the I/O supply. These caps need to be close to the DSP power pins, no more than 1.25 cm maximum distance to be effective. Physically smaller caps, such as 0402, are better because of their lower parasitic inductance. Proper capacitance values are also important. Small bypass caps (near 560 pF) should be closest to the power pins. Medium bypass caps (220 nF or as large as can be obtained in a small package) should be next closest. TI recommends no less than 8 small and 8 medium caps per supply (32 total) be placed immediately next to the BGA vias, using the “interior” BGA space and at least the corners of the “exterior”. Eight larger caps (4 for each supply) can be placed further away for bulk decoupling. Large bulk caps (on the order of 100 µF) should be furthest away (but still as close as possible). No less than 4 large caps per supply (8 total) should be placed outside of the BGA. Any cap selection needs to be evaluated from a yield/manufacturing point-of-view. As with the selection of any component, verification of capacitor availability over the product’s production lifetime should be considered. |
Similar Part No. - TMS320C6414T_08 |
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Similar Description - TMS320C6414T_08 |
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