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AS7058 数据表(PDF) 27 Page - ams-OSRAM AG |
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AS7058 数据表(HTML) 27 Page - ams-OSRAM AG |
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27 / 199 page  AS7058 Functional description Datasheet • PUBLIC • Document Feedback DS001077 • v2-00 • 2025-Sep-24 27 / 199 / 7.3 PPG ADC1 and ADC2 The PPG data acquisition signal path of AS7058 features two parallel synchronous current input analog to digital converters. Both ADC channels shown in Figure 24 and Figure 25 do provide same functionality and support true synchronous sampling of the assigned photodiode inputs. Therefore, it is possible to read out two photodiodes in a single PPG subsample measurement. Figure 24: PPG ADC 1 signal path Figure 25: PPG ADC 2 signal path MOD 1 Current input PPG ADC 1µA - 64µA; 20 Bit Current DAC 1 Offset Compensation 8bit; 1µA- 128µA PDREF PDx PDx_MUX PDREF MOD1 MOD2 Digital Sequencer Offset Control Signal AAOC Bitstream to Decimation filter PDx PDx Decimation Filters and post processing MOD 2 Current input PPG ADC 1µA - 64µA; 20 Bit Current DAC 2 Offset Compensation 8bit; 1µA- 128µA PDREF PDx PDx_MUX PDREF MOD1 MOD2 Digital Sequencer Offset Control Signal AAOC Bitstream to Decimation filter PDx PDx Decimation Filters and post processing |
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