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AS7058 数据表(PDF) 37 Page - ams-OSRAM AG |
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AS7058 数据表(HTML) 37 Page - ams-OSRAM AG |
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37 / 199 page  AS7058 Functional description Datasheet • PUBLIC • Document Feedback DS001077 • v2-00 • 2025-Sep-24 37 / 199 / The assignment of the photodiodes is for both measurements the same. The programmed DAC offset current is used for the first measurement and can also be used for the second measurement (DIS_LEDOFF = 1). Alternatively, it is possible to use also a different value, which is stored to IOS_LEDOFF register, for all subsamples if register DIS_LEDOFF bit is cleared. Figure 32: Double measurement mode – simplified timing diagram Photodiode Selection Photodiode Offset Current LED On ADC Modulator ADC Reset SINC Downsampler Sample Data LED On Sample Data LED ON Sample Data LED Off Sample Data LED Off Result Sample Difference DATA LED ON -DATA LED OFF PPG Sequencer PPG Sample PPG Sample PPG Sample PPG Sample Period PPG Sample Period t Subsample 1 Subsample 2 Subsample 3 Subsample 4 Subsample 5 Subsample 6 Subsample 7 Subsample 8 PPG Sub-Samples Double PPG Measurement |
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