32G474 datasheet(140/236 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32G474xB STM32G474xC STM32G474xE

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DS12288 Rev 4

5.3.19

Analog-to-digital converter characteristics

Unless otherwise specified, the parameters given in Table 66 are preliminary values derived

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

conditions summarized in Table 17: General operating conditions.

Note:

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

Table 66. 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

VCMIN

Input common

mode

Differential

(VREF++VREF-)/2

- 0.18

(VREF+ +

VREF-)/2

(VREF+ + VREF-)/2

+ 0.18

fADC

ADC clock

frequency

Range 1, single

ADC operation

0.14

MHz

Range 2

Range 1, all ADCs

operation, single

ended mode

VDDA ≥ 2.7 V

0.14

Range 1, all ADCs

operation, single

ended mode

VDDA ≥ 1.62 V

0.14

Range 1, all ADCs

operation,

differential mode

VDDA ≥ 1.62 V

0.14

Sampling rate,

continuous mode

For given

resolution and

sampling time

cycles (ts)

0.001

fADC / (sampling time [cycles] +

resolution [bits] + 0.5)

Msps

TTRIG

External trigger

period

Considering trigger

conversion latency

time (tLATR or

tLATRINJ)

1ms

Resolution =

12 bits,

fADC=60 MHz

tconv + [tLATR or

tLATRINJ]

VAIN (3)

Conversion

voltage range

-0

VREF+

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