STM32L475VC datasheet(87/193 Pages) STMICROELECTRONICS

部件名	STM32L475VC

功能描述	Ultra-low-power ARM Cortex-M4 32-bit MCUFPU, 100DMIPS, up to 1MB Flash, 128 KB SRAM, USB OTG FS, analog, audio

PDF	193 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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DocID027692 Rev 2

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STM32L475xx

Electrical characteristics

181

6.3.4

Embedded voltage reference

The parameters given in Table 25 are derived from tests performed under the ambient

temperature and supply voltage conditions summarized in Table 22: General operating

conditions.

Table 25. Embedded internal voltage reference

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VREFINT

Internal reference voltage

–40 °C < TA < +130 °C

1.182

1.212

1.232

tS_vrefint (1)

ADC sampling time when

reading the internal reference

voltage

-4(2)

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 < TA < +130°C

50(2)

ppm/°C

ACoeff

Long term stability

1000 hours, T = 25°C

TBD(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

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

2. Guaranteed by design.

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