STM32L4S5AI datasheet(186/275 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32L4S5xx, STM32L4S7xx and STM32L4S9xx

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DocID030322 Rev 2

6.3.21

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)

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

5.33

Msps

Resolution = 10 bits

6.15

Resolution = 8 bits

7.27

Resolution = 6 bits

8.88

Sampling rate

for SLOW

channels

Resolution = 12 bits

4.21

Resolution = 10 bits

4.71

Resolution = 8 bits

5.33

Resolution = 6 bits

6.15

fTRIG

External trigger

frequency

fADC = 80 MHz

Resolution = 12 bits

5.33

MHz

Resolution = 12 bits

1/fADC

VAIN (3)

Conversion

voltage range(2)

-0

VREF+

RAIN

External input

impedance

kΩ

CADC

Internal sample

and hold

capacitor

tSTAB

Power-up time

conversi

on cycle

tCAL

Calibration time

fADC = 80 MHz

1.45

µs

116

1/fADC

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