STM32F030R8 Datasheet, PDF (17/88 Pages) STMicroelectronics – Value-line ARM-based 32-bit MCU with 16 to 64-KB Flash, timers, ADC, communication interfaces, 2.4-3.6 V operation

STM32F030x4 STM32F030x6 STM32F030x8
Functional overview
3.10
3.10.1
Analog to digital converter (ADC)
The 12-bit analog to digital converter has up to 16 external and 2 internal (temperature
sensor/voltage reference measurement) channels and performs conversions in single-shot
or scan modes. In scan mode, automatic conversion is performed on a selected group of
analog inputs.
The ADC can be served by the DMA controller.
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.
Temperature sensor
The temperature sensor (TS) generates a voltage V_SENSE that varies linearly with
temperature.
The temperature sensor is internally connected to the ADC_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.
Table 3. Temperature sensor calibration values
Calibration value name
Description
Memory address
TS_CAL1
TS_CAL2
TS ADC raw data acquired at
temperature of 30 °C,
V_DDA= 3.3 V
TS ADC raw data acquired at
temperature of 110 °C
V_DDA= 3.3 V
0x1FFF F7B8 - 0x1FFF F7B9
0x1FFF F7C2 - 0x1FFF F7C3
3.10.2
Internal voltage reference (V_REFINT)
The internal voltage reference (V_REFINT) provides a stable (bandgap) voltage output for the
ADC. V_REFINT is internally connected to the ADC_IN17 input channel. The precise voltage
of V_REFINT 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.
Table 4. Internal voltage reference calibration values
Calibration value name
Description
Memory address
VREFINT_CAL
Raw data acquired at
temperature of 30 °C
V_DDA= 3.3 V
0x1FFF F7BA - 0x1FFF F7BB
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