STM32WB55CC datasheet(127/165 Pages) STMICROELECTRONICS

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DS11929 Rev 3

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STM32WB55xx

Electrical characteristics

152

6.3.20

Analog-to-Digital converter characteristics

Unless otherwise specified, the parameters given in Table 73 are preliminary values derived

from tests performed under ambient temperature, fPCLK frequency and VDDA supply voltage

conditions summarized in Table 22: General operating conditions.

Note:

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

Table 73. ADC characteristics(1) (2) (3)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VDDA

Analog supply voltage

1.62

3.6

VREF+

Positive reference

voltage

VDDA ≥ 2 V

VDDA

VDDA < 2 V

VDDA

VREF-

Negative reference

voltage

-VSSA

fADC

ADC clock frequency

Range 1

MHz

Range 2

Sampling rate

for FAST channels

Resolution = 12 bits

4.26

Msps

Resolution = 10 bits

4.92

Resolution = 8 bits

5.81

Resolution = 6 bits

7.11

Sampling rate

for SLOW channels

Resolution = 12 bits

TBD

Resolution = 10 bits

TBD

Resolution = 8 bits

TBD

Resolution = 6 bits

TBD

fTRIG

External trigger

frequency

fADC = 64 MHz

Resolution = 12 bits

4.26

MHz

Resolution = 12 bits

1/fADC

VCMIN

Input common mode

Differential mode

(VREF++

VREF-) / 2

- 0.18

(VREF++

VREF-) / 2

(VREF++

VREF-) / 2

+ 0.18

VAIN (4)

Conversion voltage

range(2)

-0

VREF+

RAIN

External input

impedance

kΩ

CADC

Internal sample and hold

capacitor

tSTAB

Power-up time

Conversion

cycle

tCAL

Calibration time

fADC = 64 MHz

1.8125

µs

116

1 / fADC

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