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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ADS5294IPFPR датащи(PDF) 57 Page - Texas Instruments |
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ADS5294IPFPR датащи(HTML) 57 Page - Texas Instruments |
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57 / 67 page  ADS5294 www.ti.com SLAS776B – NOVEMBER 2011 – REVISED JULY 2012 Custom Filter Coefficients The filter coefficients can also be programmed by the user (customized). For custom coefficients, set the register bit <FILTER COEFF SELECT> and load the coefficients (h0 to h11) in registers 0x5A to 0xB9, using the serial interface as: Register content = real coefficient value x 211, i.e., 12 bit signed representation of real coefficient. Board Design Considerations Grounding A single ground plane is sufficient to give good performance, provided the analog, digital, and clock sections of the board are cleanly partitioned. See ADS5294VM Evaluation Module (SLAU355) for placement of components, routing and grounding. Supply Decoupling Because the ADS5294 already includes internal decoupling, minimal external decoupling can be used without loss in performance. For example, the ADS5294EVM uses a single 0.1 µF decoupling capacitor for each supply, placed close to the device supply pins. Packaging Exposed Pad The exposed pad at the bottom of the package is the main path for heat dissipation. Therefore, the pad must be soldered to a ground plane on the PCB for best thermal performance. The pad must be connected to the ground plane through the optimum number of vias. Also, visit TI’s thermal website at www.ti.com/thermal. Copyright © 2011–2012, Texas Instruments Incorporated Submit Documentation Feedback 57 Product Folder Link(s) :ADS5294 |
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