STM32WBA62CGF6 datasheet(49/185 Pages) STMICROELECTRONICS

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DS14736 Rev 1

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STM32WBA6xxx

Functional overview

•

Analog input channels

–

Up to 10 external analog inputs

–

One channel for the internal temperature sensor (VSENSE)

–

One channel for the internal reference voltage (VREFINT)

–

One channel for the internal digital core voltage (VCORE)

•

Start-of-conversion can be initiated:

–

By software

–

By hardware triggers with configurable polarity (timer events or GPIO input

events)

•

Conversion modes

–

Conversion of a single channel or scan of a sequence of channels

–

Selected inputs converted once per trigger in Single mode

–

Selected inputs converted continuously in Continuous mode

–

Discontinuous mode

•

Interrupt generation at the end of sampling, end of conversion, end of sequence

conversion, and in case of analog watchdog or overrun events, with wake-up from Stop

capability

•

Three analog watchdogs

•

ADC supply requirements: 1.62 to 3.6 V

•

ADC input range: VSSA < VIN < VDDA

Note:

The ADC4 analog block clock frequency after the ADC4 prescaler must be between

140 kHz and 55 MHz.

Note:

VSSA is connected to package pin VSS.

3.20.1

Temperature sensor (VSENSE)

The temperature sensor generates a voltage VSENSE that varies linearly with temperature.

The temperature sensor is internally connected to ADC4 input channel that is used to

convert the sensor output voltage into a digital value.

The sensor provides good linearity but it must be calibrated to obtain a good 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 STMicroelectronics in the system memory area, accessible in read-only mode.

Table 14. Temperature sensor calibration values

Calibration

value name

Description

Memory address

TS_CAL1

Temperature sensor ADC4 12-bit raw data acquired at (30 ± 5) °C,

VDDA = 3.0 V (± 10 mV)

0x0BFA 0710 - 0x0BFA 0711

TS_CAL2

Temperature sensor ADC4 12-bit raw data acquired at (130 ± 5) °C,

VDDA = 3.0 V (± 10 mV)

0x0BFA 0742 - 0x0BFA 0743

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