STM32F378CC datasheet(59/131 Pages) STMICROELECTRONICS

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STM32F378xx

Electrical characteristics

110

6.3.3

Embedded reference voltage

The parameters given in Table 25 are derived from tests performed under ambient

temperature and VDD supply voltage conditions summarized in Table 22.

Table 24. Embedded internal reference voltage calibration values

Calibration value name

Description

Memory address

VREFINT_CAL

Raw data acquired at

temperature of 30 °C

VDDA= 3.3 V

0x1FFF F7BA - 0x1FFF F7BB

Table 25. Embedded internal reference voltage

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VREFINT

Internal reference voltage

–40 °C < TA < +105 °C 1.20 1.23 1.25

TS_vrefint(1)

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

ADC sampling time when

reading the internal reference

voltage

17.10

µs

VREFINT_s(2)

2. Guaranteed by design.

Internal reference voltage

spread over the temperature

range

VDD = 3 V ±10 mV

TCoeff(2)

Temperature coefficient

100

ppm/°C

tSTART(2)

Startup time

µs

tVREFINT_RD

(3)

3. Guaranteed by design. Latency between the time when the NPOR pin is set to 1 by the application and the

time when the VREFINTRDYF bit is set to 1 by the hardware.

Internal reference voltage

temporization

1.50

2.50

4.50

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