STM32WB10CC datasheet(62/110 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32WB10CC

62/110

DS13259 Rev 2

6.3.6

Embedded voltage reference

The parameters given in Table 27 are derived from tests performed under ambient

temperature and supply voltage conditions summarized in Table 20: General operating

conditions.

Figure 12. VREFINT vs. temperature

Table 27. Embedded internal voltage reference

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VREFINT

Internal reference voltage

–10 °C < TJ < +85 °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 enabled

12(2)

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

–10 °C < TJ < +85 °C

50(2)

ppm/°C

ACoeff

Long term stability

1000 hours, TJ = 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. Specified by design, not tested in production.

MSv63022V1

-20

100

120 °C

Mean

Min

Max

1.185

1.190

1.195

1.200

1.205

1.210

1.215

1.220

1.225

1.230

1.235

T (

oC)

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