STM32L412RBT3TR datasheet(81/192 Pages) STMICROELECTRONICS

部件名	STM32L412RBT3TR

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

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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81 / 192 page

DS12469 Rev 4

81/192

STM32L412xx

Electrical characteristics

163

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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