STM32WB55VCV7 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM32WB55VCV7

Multiprotocol wireless 32-bit MCU Arm®-based Cortex®-M4 with FPU, Bluetooth® 5 and 802.15.4 radio solution

STMicroelectronics 

Electrical characteristics

STM32WB55xx STM32WB35xx

6.3.7

Embedded voltage reference

The parameters given in Table 36 are derived from tests performed under the ambient

temperature and supply voltage conditions summarized in Table 24: General operating

conditions.

Symbol

Table 36. Embedded internal voltage reference

Parameter

Conditions

Min Typ Max Unit

VREFINT

Internal reference voltage

–40 °C < TA < +125 °C 1.182 1.212 1.232

V

tS_vrefint (1)

ADC sampling time when reading

the internal reference voltage

-

tstart_vrefint

Start time of reference voltage

buffer when ADC is enabled

-

4(2)

-

-

µs

-

8

12(2)

IDD(VREFINTBUF)

VREFINT buffer consumption from

VDD when converted by ADC

-

-

∆VREFINT

Internal reference voltage spread

over the temperature range

VDD = 3 V

-

TCoeff

Temperature coefficient

–40 °C < TA < +125 °C

-

ACoeff

Long term stability

1000 hours, T = 25 °C

-

VDDCoeff

Voltage coefficient

3.0 V < VDD < 3.6 V

-

VREFINT_DIV1 1/4 reference voltage

24

VREFINT_DIV2 1/2 reference voltage

-

49

VREFINT_DIV3 3/4 reference voltage

74

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

2. Guaranteed by design.

12.5 20(2)

µA

5

7.5(2)

mV

30

50(2) ppm/°C

300 1000(2) ppm

250 1200(2) ppm/V

25

26

50

51

%

VREFINT

75

76

Figure 21. VREFINT vs. temperature

V

1.235

1.23

1.225

1.22

1.215

1.21

1.205

1.2

1.195

1.19

1.185

-40

-20

0

20

40

60

80

100

120 °C

Mean

Min

Max

MSv40169V1

98/193

DS11929 Rev 10

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