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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MAX17843 датащи(PDF) 38 Page - Maxim Integrated Products |
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MAX17843 датащи(HTML) 38 Page - Maxim Integrated Products |
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38 / 131 page  Scan Modes The cell, block, and diagnostic-measurement cycle con- sists of two conversion phases. In each phase, the ADC scans through the enabled input channels. There are two scan modes configured by the SCANMODE bit. If SCANMODE = 0, the mode is pyramid mode, as shown in Figure 16. If SCANMODE = 1, the mode is top-down mode. In pyramid mode, the ADC scans first ascending and then descending. In top-down mode, the ADC scans descending in both phases. In the second scan, the amplifier inputs are inverted to effectively chop out any offset and reference-induced errors. The two conversions are then offset corrected and averaged in the ALU. After the cell and block scans are complete, the diag- nostic conversions are made, if enabled, and finally, the auxiliary inputs, if enabled, are converted. The auxiliary inputs are measured using a single conversion and stored in the AIN1 and AIN2 registers. Any extra settling time, if configured by AINCFG[5:0], is implemented just before the conversion for each AUXIN channel, so if both inputs are enabled, the extra settling time occurs twice. Figure 16. Acquisition, OVSAMP[2:0]=0h and SCANMODE=0 Figure 17. Acquisition, OVSAMP[2:0] > 0 and SCANMODE=0 MAX17843 12-Channel, High-Voltage Smart Sensor Data-Acquisition Interface www.maximintegrated.com Maxim Integrated │ 38 |
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