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AD1376JD Folha de dados(PDF) 8 Page - Analog Devices |
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AD1376JD Folha de dados(HTML) 8 Page - Analog Devices |
8 / 8 page AD1376/AD1377 –8– REV. B OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 32-Pin Ceramic DIP (DH-32E) edge of STATUS places the AD386 back into track mode. System throughput will be reduced if a long CONVERT START pulse is used. Throughput can be calculated from Throughput = 1 T ACQ + T CONV + T CS where TACQ is the T/H acquisition time, TCONV is the time required for the A/D conversion, and TCS is the duration of CONVERT START. The combination of the AD1376 and AD386 will provide greater than 50 kHz throughput. No signifi- cant T/H droop error will be introduced provided the width of CONVERT START is small compared with the A/D’s conver- sion time. Figure 15. Improved Data Acquisition System Using the AD1376 or AD1377 at Slower Conversion Times The user may wish to run the ADC at slower conversion times in order to synchronize the A/D with an external clock. This is accomplished by running a slower clock than the internal clock into the START CONVERT input. This clock must consist of narrow negative-going clock pulses, as seen in Figure 16. The pulse must be a minimum of 100 ns wide but not greater than 700 ns. Having a rising edge immediately after a falling edge inhibits the internal clock pulse. This enables the ADC to func- tion normally and complete a conversion after 17 clock pulses. The STATUS command will function normally and switch high after the first clock pulse and will fall low after the 17th clock pulse. In this way an external clock can be used to control the ADC at slower conversion times. Figure 16. Timing Diagram for Use with an External Clock |
Nº de peça semelhante - AD1376JD |
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Descrição semelhante - AD1376JD |
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