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ADS8411IPFBT Datasheet(PDF) 19 Page - Burr-Brown (TI) |
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ADS8411IPFBT Datasheet(HTML) 19 Page - Burr-Brown (TI) |
19 / 23 page www.ti.com APPLICATION INFORMATION MICROCONTROLLER INTERFACING ADS8411 to 8-Bit Microcontroller Interface CS RD CONVST BUSY BDGND +VBD DB[15:8] Micro Controller RD GPIO INT 10 µF 0.1 µF Analog 5 V 0.1 µF Digital 3 V Ext Ref Input Analog Input ADS8411 0.1 µF 1 µF AGND BDGND GPIO BYTE P[7:0] GPIO 0.1 µF 1 µF 0.1 µF 10 µF Analog 5 V ADS8411 AGND AGND PRINCIPLES OF OPERATION ADS8411 SLAS369B – APRIL 2002 – REVISED DECEMBER 2004 Figure 29 shows a parallel interface between the ADS8411 and a typical microcontroller using the 8-bit data bus. The BUSY signal is used as a falling-edge interrupt to the microcontroller. Figure 29. ADS8411 Application Circuitry (using external reference) Figure 30. Use Internal Reference The ADS8411 is a high-speed successive approximation register (SAR) analog-to-digital converter (ADC). The architecture is based on charge redistribution, which inherently includes a sample/hold function. See Figure 29 for the application circuit for the ADS8411. The conversion clock is generated internally. The conversion time of 400 ns is capable of sustaining a 2-MHz throughput. 19 |
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