STM32U5A5QJ datasheet(191/382 Pages) STMICROELECTRONICS

191 / 382 page

DS13543 Rev 1

191/382

STM32U5Axxx

Electrical characteristics

348

5.3.4

Embedded voltage reference

The parameters given in the table below are derived from tests performed under the

ambient temperature and supply voltage conditions summarized in Table 33.

IDD_BOR0(2)

Additional BOR0 consumption if

ULPMEN = 0 versus ULPMEN = 1

Standby mode

IDD_BOR_PVD(2)

BOR(3) (except BOR0) and PVD

consumption from VDD(4)

1.5

µA

VBOR_VBAT

VBAT brownout reset threshold

1.58

1.65

tVBAT_BOR

_sampling

VBAT BOR sampling period

in VBAT mode

MONEN = 0(5)

-0.5

2.5

VAVM1

VDDA voltage monitor 1 threshold

Rising edge

1.61

1.68

1.75

Falling edge

1.58

1.65

1.71

VAVM2

VDDA voltage monitor 2 threshold

Rising edge

1.77

1.86

1.95

Falling edge

1.73

1.82

1.9

VIO2VM

VDDIO2 voltage monitor threshold

0.96

1.01

1.05

VUVM

VDDUSB voltage monitor threshold

1.15

1.22

1.28

Vhyst_AVM

Hysteresis of VDDA voltage monitor

IDD_VM(2)

Voltage monitor consumption from

VDD (AVM1, AVM2, IO2VM or UVM

single instance)

0.4

0.6

µA

IDD_AVM_A(2)

VDDA voltage monitor consumption

from VDDA (resistor bridge)

1.25

1.85

1. Evaluated by characterization and not tested in production, unless otherwise specified.

2. Specified by design. Not tested in production

3. BOR0 is enabled in all modes (except Shutdown), and its consumption is therefore included in the supply current

characteristics tables.

4. This is also the consumption saved in Standby mode when ULPMEN = 1.

5. VBAT brownout reset monitoring is discontinuous when MONEN = 0 in PWR_BDCR1, and is continuous when MONEN = 1.

Table 35. Embedded reset and power control block characteristics(1) (continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Table 36. Embedded internal voltage reference

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VREFINT(1)

Internal reference voltage

Range 1, 2, 3

1.175 1.215 1.255

Range 4 and

low-power modes

1.170 1.215 1.260

tS_vrefint(2)(3)

ADC sampling time when reading

the internal reference voltage

12.65

µs

tstart_vrefint(3)

Start time of reference voltage buffer

when the ADC is enabled

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