STM32U545NET3QTR datasheet(139/283 Pages) STMICROELECTRONICS

139 / 283 page

DS14216 Rev 1

139/283

STM32U545xx

Electrical characteristics

258

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.

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

IDD(VREFINTBUF)

(3)

VREFINT buffer consumption from

VDD when converted by the ADC

1.5

2.1

µA

∆VREFINT(4)

Internal reference voltage spread

over the temperature range

VDD = 3 V

11.5

TCoeff(4)

Average temperature coefficient

–40°C < TJ < +130 °C

125

ppm/°C

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