STM32L552CCT3PTR datasheet(239/340 Pages) STMICROELECTRONICS

239 / 340 page

DS12737 Rev 6

239/340

STM32L552xx

Electrical characteristics

307

5.3.19

Analog-to-digital converter characteristics

Unless otherwise specified, the parameters given in Table 109 are preliminary values

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

voltage conditions summarized in Table 27: General operating conditions.

Note:

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

Table 109. 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 0 and 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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