Figure 151. Vbat Channel Block Diagram - ST STM32G4 Series Reference Manual

Advanced arm-based 32-bit mcus

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TS_CAL2 is the temperature sensor calibration value acquired at TS_CAL2_TEMP.

TS_CAL1 is the temperature sensor calibration value acquired at TS_CAL1_TEMP.

TS_DATA is the actual temperature sensor output value converted by ADC.

Refer to the device datasheet for more information about TS_CAL1 and TS_CAL2

calibration points.

The sensor has a startup time after waking from power-down mode before it can output V

at the correct level. The ADC also has a startup time after power-on, so to minimize the

delay, the ADEN and VSENSESEL bits should be set at the same time.

supply monitoring

The VBATSEL bit in the ADCx_CCR register is used to switch to the battery voltage. As the

voltage could be higher than V

pin is internally connected to a bridge divider by 3. This bridge is automatically enabled

when VBATSEL is set, to connect V

converted digital value is one third of the V

consumption on the battery, it is recommended to enable the bridge divider only when

needed, for ADC conversion.

Refer to the electrical characteristics of the device datasheet for the sampling time value to

be applied when converting the V

The figure below shows the block diagram of the V

1. The VBATSEL bit must be set to enable the conversion of internal channel for V

Figure 151. V

, to ensure the correct operation of the ADC, the

/3 to the ADC input channels. As a consequence, the

voltage. To prevent any unwanted

channel block diagram

RM0440 Rev 1

Analog-to-digital converters (ADC)

sensing feature.

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