STM32L412RBT3XXX datasheet(82/192 Pages) STMICROELECTRONICS

部件名	STM32L412RBT3XXX

功能描述	Ultra-low-power Arm® Cortex®-M4 32-bit MCUFPU, 100DMIPS, up to 128KB Flash, 40KB SRAM, analog, ext. SMPS

PDF	192 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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82 / 192 page

Electrical characteristics

STM32L412xx

82/192

DS12469 Rev 8

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.

Table 24. 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

Temperature coefficient

–40°C < TA < +130°C

50(2)

ppm/°C

ACoeff

Long term stability

1000 hours, T = 25°C

300

1000(2)

ppm

VDDCoeff

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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