STM32F302CBY6TR 查看數據表（PDF） - STMicroelectronics
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STM32F302CBY6TR
STMicroelectronics
STM32F302CBY6TR Datasheet PDF : 144 Pages
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Functional overview
STM32F302xB STM32F302xC
3.13
3.13.1
3.13.2
Fast analog-to-digital converter (ADC)
Two fast analog-to-digital converters 5 MSPS, with selectable resolution between 12 and 6
bit, are embedded in the STM32F302xB/STM32F302xC family devices. The ADCs have up
to 17 external channels (5 channels multiplexed between ADC1 and ADC2). Channels can
be configured to be either single-ended input or differential input. The ADCs can perform
conversions in single-shot or scan modes. In scan mode, automatic conversion is performed
on a selected group of analog inputs.
The ADCs have also internal channels: Temperature sensor connected to ADC1 channel
16, VBAT/2 connected to ADC1 channel 17, Voltage reference VREFINT connected to the 2
ADCs channel 18, VREFOPAMP1 connected to ADC1 channel 15 and VREFOPAMP2
connected to ADC2 channel 17.
Additional logic functions embedded in the ADC interface allow:
• Simultaneous sample and hold
• Interleaved sample and hold
• Single-shunt phase current reading techniques.
The ADC can be served by the DMA controller. 3 analog watchdogs per ADC are available.
An analog watchdog feature allows very precise monitoring of the converted voltage of one,
some or all selected channels. An interrupt is generated when the converted voltage is
outside the programmed thresholds.
The events generated by the general-purpose timers and the advanced-control timer (TIM1)
can be internally connected to the ADC start trigger and injection trigger, respectively, to
allow the application to synchronize A/D conversion and timers.
Temperature sensor
The temperature sensor (TS) generates a voltage VSENSE that varies linearly with
temperature.
The temperature sensor is internally connected to the ADC1_IN16 input channel which is
used to convert the sensor output voltage into a digital value.
The sensor provides good linearity but it has to be calibrated to obtain good overall
accuracy of the temperature measurement. As the offset of the temperature sensor varies
from chip to chip due to process variation, the uncalibrated internal temperature sensor is
suitable for applications that detect temperature changes only.
To improve the accuracy of the temperature sensor measurement, each device is
individually factory-calibrated by ST. The temperature sensor factory calibration data are
stored by ST in the system memory area, accessible in read-only mode.
Internal voltage reference (VREFINT)
The internal voltage reference (VREFINT) provides a stable (bandgap) voltage output for the
ADC and Comparators. VREFINT is internally connected to the ADCx_IN18, x=1...2 input
channel. 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.
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