STM32F031X4 datasheet(70/106 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F031x4 STM32F031x6

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DocID025743 Rev 4

Figure 23. Recommended NRST pin protection

1. The external capacitor protects the device against parasitic resets.

2. The user must ensure that the level on the NRST pin can go below the VIL(NRST) max level specified in

Table 49: NRST pin characteristics. Otherwise the reset will not be taken into account by the device.

6.3.16

12-bit ADC characteristics

Unless otherwise specified, the parameters given in Table 50 are derived from tests

performed under the conditions summarized in Table 18: General operating conditions.

Note:

It is recommended to perform a calibration after each power-up.

Table 50. ADC characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VDDA

Analog supply voltage for

ADC ON

2.4

3.6

IDDA (ADC)

Current consumption of

the ADC(1)

VDDA = 3.3 V

0.9

fADC

ADC clock frequency

0.6

MHz

fS(2)

Sampling rate

12-bit resolution

0.043

MHz

fTRIG(2)

External trigger frequency

fADC = 14 MHz,

12-bit resolution

823

kHz

12-bit resolution

1/fADC

VAIN

Conversion voltage range

VDDA

RAIN(2)

External input impedance

See Equation 1 and

Table 51 for details

RADC(2)

Sampling switch

resistance

CADC(2)

Internal sample and hold

capacitor

tCAL(2)(3)

Calibration time

fADC = 14 MHz

5.9

µs

-83

1/fADC

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