STM32U595AI datasheet(275/377 Pages) STMICROELECTRONICS

275 / 377 page

DS13633 Rev 1

275/377

STM32U59xxx

Electrical characteristics

343

Figure 37. ADC accuracy characteristics

SINAD

Signal-to-noise and

distortion ratio

Single ended

Differential

SNR

Signal-to-noise ratio

Single ended

Differential

THD

Total harmonic distortion

Single ended

-84

-80

Differential

-95

-89

1. Evaluated by characterization for BGA packages. Not tested in production. The values for LQFP packages may differ.

2. ADC DC accuracy values are measured after the internal calibration.

3. Extended calibration mode activated.

4. The I/O analog switch voltage booster is enable when VDDA < 2.4 V (BOOSTEN = 1 in SYSCFG_CFGR1 when

VDDA < 2.4 V). The booster is disabled when VDDA ≥ 2.4 V. Resolution = 14 bits, no oversampling.

5. This parameter may degrade in case of digital activity on adjacent I/Os.

Table 96. 14-bit ADC12 accuracy(1)(2)(3) (continued)

Symbol

Parameter

Conditions(4)

Min

Typ

Max

Unit

MSv19880V6

(1) Example of an actual transfer curve

(2) Ideal transfer curve

(3) End-point correlation line

n = ADC resolution

ET = total unadjusted error: maximum deviation

between the actual and ideal transfer curves

EO = offset error: maximum deviation between the first

actual transition and the first ideal one

EG = gain error: deviation between the last ideal

transition and the last actual one

ED = differential linearity error: maximum deviation

between actual steps and the ideal one

EL = integral linearity error: maximum deviation between

any actual transition and the end point correlation line

n-1

Output code

VSSA

n-2

n-3

VREF+ (VDDA)

1 LSB ideal

(1)

(2)

(3)

(or

)]

[1LSB =

VDDA

VREF+

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