STM32WB50CG datasheet(101/119 Pages) STMICROELECTRONICS

101 / 119 page

DS13047 Rev 5

101/119

STM32WB50CG STM32WB30CE

Electrical characteristics

110

Table 73. ADC accuracy - Limited test conditions 2(1)(2)(3)

1. Guaranteed by design.

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

3. ADC accuracy vs. negative injection current: Injecting negative current on any analog input pins must be

avoided as this significantly reduces the accuracy of the conversion being performed on another analog

input. It is recommended to add a Schottky diode (pin to ground) to analog pins that may potentially inject

negative current.

Symbol

Parameter

Conditions(4)

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

SYSCFG_CFGR1 when VDDA < 2.4 V). It is disabled when VDDA ≥ 2.4 V. No oversampling.

Min

Typ

Max

Unit

Total

unadjusted

error

Single ended

6.5

LSB

Differential

3.5

5.5

Offset error

Single ended

Differential

1.5

Gain error

Single ended

2.5

Differential

2.5

3.5

Differential

linearity error

Single ended

1.5

Differential

1.2

Integral

linearity error

Single ended

1.5

3.5

Differential

2.5

ENOB

Effective

number of bits

Single ended

10.5

bits

Differential

10.7

10.9

SINAD

Signal-to-noise

and distortion

ratio

Single ended

Differential

67.4

SNR

Signal-to-noise

ratio

Single ended

Differential

66.5

THD

Total harmonic

distortion

Single ended

-74

-67

Differential

-79

-71

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