STM32WBA50KG datasheet(67/110 Pages) STMICROELECTRONICS

67 / 110 page

DS14688 Rev 1

67/110

STM32WBA50KG

Electrical characteristics

103

5.3.6

Embedded voltage reference

The parameters in Table 35 are derived under ambient temperature and supply voltage

conditions summarized in Table 26.

Figure 11. VREFINT vs. temperature

2. Evaluated by characterization, not tested in production.

3. BOR0 is enabled in all modes, its consumption is therefore included in the supply current characteristics tables.

Table 35. Embedded internal voltage reference

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VREFINT(1)

Internal reference voltage

Range 1

1.175 1.209 1.243

Range 2

and low power modes

1.170 1.206 1.248

tS_vrefint(2)

ADC sampling time when reading

the internal reference voltage(3)

11.25

µs

tstart_vrefint(2)

Start time of reference voltage

buffer when ADC is enabled

∆VREFINT(4)

Internal reference voltage spread

over the temperature range

VDD = 3 V,

–40 °C ≤ TJ ≤ +130 °C

-8.2

TCoeff(4)

Temperature coefficient

–40 °C ≤ TJ ≤ +130 °C

ppm/°C

ACoeff(2)

Long term stability

1000 hours, T = 25 °C

400

ppm

VDDCoeff(4)

Voltage coefficient

3.0 V ≤ VDD ≤ 3.6 V

500

ppm/V

1. VREFINT does not take into account package and soldering effects.

2. Specified by design, not tested in production.

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

4. Evaluated by characterization, not tested in production.

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