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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TMF8701 датащи(PDF) 50 Page - OSRAM GmbH |
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TMF8701 датащи(HTML) 50 Page - OSRAM GmbH |
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50 / 66 page  Datasheet, Public Page 49 [v2-00] 2023-Feb-21 Document Feedback TMF8701 − Application Information Reference SPAD, TDC and Histogram There is an internal reference SPAD with associated TDC and histogram. This is used to determine the start time of each pulse. The reference SPAD is processed during calibration. The reference channel processing occurs internal to the device with no user interaction required. All histograms can be processed inside the TMF8701 and/or readout through the I²C interface. As the readout is constrained by the I²C speed and the I²C bus utilization (TMF8701 can support I²C speed up to 1MHz), it is recommended to readout the histograms only for debugging purposes. Figure 115 shows a histogram obtained from TMF8701. The x-axis is scaled in bins, and the nominal bin size is 100ps per bin and each TDC has 256 bins. The y-axis is scaled in counts represented by 16 bits values. The green line shows the reference histogram from TDC0 and its peak marks the reference or zero distance. The other four lines (blue, cyan, red and violet) are the histograms obtained from TDC1 to TDC4. A target at 20cm is used to generate the peak around bin 25. Figure 115: Histogram |
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