STM32L4P5CE datasheet(142/311 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32L4P5xx

142/311

DS12903 Rev 2

6.3.4

Embedded voltage reference

The parameters given in Table 24 are derived from tests performed under the ambient

temperature and supply voltage conditions summarized in Table 21: General operating

conditions.

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

current characteristics tables.

Table 24. Embedded internal voltage reference

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VREFINT

Internal reference

voltage

–40 °C < TJ < +130 °C 1.182 1.212 1.232

tS_vrefint (1)

1. The shortest sampling time can be determined in the application by multiple iterations.

ADC sampling time

when reading the

internal reference

voltage

-4(2)

2. Guaranteed by design.

µs

tstart_vrefint

Start time of reference

voltage buffer when

ADC is enable

12(2)

µs

IDD(VREFINTBUF)

VREFINT buffer

consumption from VDD

when converted by

ADC

12.5

20(2)

µA

∆VREFINT

Internal reference

voltage spread over

the temperature range

VDD = 3 V

7.5(2)

TCoeff

Average temperature

coefficient

–40°C < TJ < +130°C

50(2)

ppm/°C

ACoeff

Long term stability

1000 hours, T = 25°C

300

1000(2)

ppm

VDDCoeff

Average voltage

coefficient

3.0 V < VDD < 3.6 V

250

1200(2) ppm/V

VREFINT_DIV1

1/4 reference voltage

VREFINT

VREFINT_DIV2

1/2 reference voltage

VREFINT_DIV3

3/4 reference voltage

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