STM32WB50CG datasheet(39/119 Pages) STMICROELECTRONICS

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DS13047 Rev 5

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STM32WB50CG STM32WB30CE

Functional overview

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Data pre-processing: left/right alignment and per channel offset compensation

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Built-in oversampling unit for enhanced SNR

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Channel-wise programmable sampling time

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Three analog watchdog for automatic voltage monitoring, generating interrupts

and trigger for selected timers

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Hardware assistant to prepare the context of the injected channels to allow fast

context switching

3.14.1

Temperature sensor

The temperature sensor (TS) generates a voltage VTS that varies linearly with temperature.

The temperature sensor is internally connected to the ADC1_IN17 input channel, which is

used to convert the sensor output voltage into a digital value.

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 in the system memory area, accessible in read-only mode.

3.14.2

Internal voltage reference (VREFINT)

The internal voltage reference (VREFINT) provides a stable (bandgap) voltage output for

the ADC. VREFINT is internally connected to the ADC1_IN0 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.

3.15

True random number generator (RNG)

The devices embed a true RNG that delivers 32-bit random numbers generated by an

integrated analog circuit.

Table 9. Temperature sensor calibration values

Calibration value name

Description

Memory address

TS_CAL1

TS ADC raw data acquired at a

temperature of 30 °C (± 5 °C),

VDDA = VREF+ = 3.0 V (± 10 mV)

0x1FFF 75A8 - 0x1FFF 75A9

TS_CAL2

TS ADC raw data acquired at a

temperature of 130 °C (± 5 °C),

VDDA = VREF+ = 3.0 V (± 10 mV)

0x1FFF 75CA - 0x1FFF 75CB

Table 10. Internal voltage reference calibration values

Calibration value name

Description

Memory address

VREFINT

Raw data acquired at a

temperature of 30 °C (± 5 °C),

VDDA = 3.6 V (± 10 mV)

0x1FFF 75AA - 0x1FFF 75AB

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