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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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STM32F303C6 Datenblatt(PDF) 21 Page - STMicroelectronics |
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STM32F303C6 Datenblatt(HTML) 21 Page - STMicroelectronics |
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21 / 115 page  DocID025083 Rev 5 21/115 STM32F303x6/x8 Functional overview 43 input channels. The precise voltage of VREFINT is individually measured for each part by ST during production test and stored in the system memory area. It is accessible in read-only mode. 3.10.3 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. 3.10.4 OPAMP2 reference voltage (VOPAMP2) OPAMP2 reference voltage can be measured using ADC2 internal channel 17. 3.11 Digital-to-analog converter (DAC) One 12-bit buffered DAC channel (DAC1_OUT1) and two 12-bit unbuffered DAC channels (DAC1_OUT2 and DAC2_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: • Three DAC output channels • 8-bit or 12-bit monotonic output • Left or right data alignment in 12-bit mode • Synchronized update capability • Noise-wave generation (only on DAC1) • Triangular-wave generation (only on DAC1) • Dual DAC channel independent or simultaneous conversions • DMA capability for each channel • External triggers for conversion 3.12 Operational amplifier (OPAMP) The STM32F303x6/8 embeds an operational amplifier (OPAMP2) with external or internal follower routing and PGA capability (or even amplifier and filter capability with external components). When an operational amplifier is selected, an external ADC channel is used to enable output measurement. The operational amplifier features: • 8 MHz GBP • 0.5 mA output capability • Rail-to-rail input/output • In PGA mode, the gain can be programmed to 2, 4, 8 or 16. |
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