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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F318C8 датащи(PDF) 20 Page - STMicroelectronics |
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STM32F318C8 датащи(HTML) 20 Page - STMicroelectronics |
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20 / 125 page  Functional overview STM32F318C8 STM32F318K8 20/125 DocID026294 Rev 5 3.11.3 VBAT battery voltage monitoring This embedded hardware feature allows the application to measure the VBAT battery voltage using the internal ADC channel ADC1_IN17. As the VBAT voltage may be higher than VDDA, and thus outside the ADC input range, the VBAT pin is internally connected to a bridge divider by 2. As a consequence, the converted digital value is half the VBAT voltage. 3.12 Digital-to-analog converter (DAC) One 12-bit buffered DAC channel (DAC1_OUT1) can be used to convert digital signals into analog voltage signal outputs. The chosen design structure is composed of integrated resistor strings and an amplifier in inverting configuration. This digital interface supports the following features: One DAC output channel 8-bit or 12-bit monotonic output Left or right data alignment in 12-bit mode Synchronized update capability Noise-wave generation Triangular-wave generation DMA capability External triggers for conversion 3.13 Operational amplifier (OPAMP) The STM32F318x8 devices embed one operational amplifier with external or internal follower routing and PGA capability (or even amplifier and filter capability with external components). When the operational amplifier is selected, an external ADC channel is used to enable output measurement. The operational amplifier features: 8.2 MHz bandwidth 0.5 mA output capability Rail-to-rail input/output In PGA mode, the gain can be programmed to be 2, 4, 8 or 16. |
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