STM32L072X8 datasheet(65/147 Pages) STMICROELECTRONICS

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STM32L072xx

Electrical characteristics

117

6.3.3

Embedded internal reference voltage

The parameters given in Table 29 are based on characterization results, unless otherwise

specified.

VPVD6

PVD threshold 6

Falling edge

2.97

3.05

3.09

Rising edge

3.08

3.15

3.20

Vhyst

Hysteresis voltage

BOR0 threshold

All BOR and PVD thresholds

excepting BOR0

-100

1. Guaranteed by characterization results.

2. Valid for device version without BOR at power up. Please see option "D" in Ordering information scheme for more details.

Table 27. Embedded reset and power control block characteristics (continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Table 28. Embedded internal reference voltage calibration values

Calibration value name

Description

Memory address

VREFINT_CAL

Raw data acquired at

temperature of 25 °C



VDDA= 3 V

0x1FF8 0078 - 0x1FF8 0079

Table 29. Embedded internal reference voltage(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VREFINT out(2)

Internal reference voltage

– 40 °C < TJ < +125 °C 1.202

1.224

1.242

TVREFINT

Internal reference startup time

VVREF_MEAS

VDDA and VREF+ voltage during

VREFINT factory measure

-2.99

3.01

AVREF_MEAS

Accuracy of factory-measured

VREFINT value(3)

Including uncertainties

due to ADC and

VDDA/VREF+ values

±5

TCoeff(4)

Temperature coefficient

–40 °C < TJ < +125 °C

100

ppm/°C

ACoeff(4)

Long-term stability

1000 hours, T= 25 °C

1000

ppm

VDDCoeff(4)

Voltage coefficient

3.0 V < VDDA < 3.6 V

2000

ppm/V

TS_vrefint(4)(5)

ADC sampling time when

reading the internal reference

voltage

-5

µs

TADC_BUF(4)

Startup time of reference

voltage buffer for ADC

µs

IBUF_ADC(4)

Consumption of reference

voltage buffer for ADC

13.5

µA

IVREF_OUT(4)

VREF_OUT output current(6)

µA

CVREF_OUT(4)

VREF_OUT output load

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