STM32H757II datasheet(192/251 Pages) STMICROELECTRONICS

192 / 251 page

Electrical characteristics

STM32H757xI

192/251

DS12931 Rev 1

Note:

ADC accuracy vs. negative injection current: injecting a negative current on any analog

input pins should 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 which may potentially inject negative currents.

Any positive injection current within the limits specified for IINJ(PIN) and ΣIINJ(PIN) in

Section 6.3.17 does not affect the ADC accuracy.

Table 101. ADC accuracy(1)(2)

Symbol

Parameter

Conditions(3)

Min

Typ

Max

Unit

Total undadjusted error

Direct

channel

Single ended

+10/–20

LSB

Differential

±15

Fast channel

Single ended

+10/–20

Differential

±15

Slow

channel

Single ended

±10

Differential

±10

Offset error

±10

Gain error

±15

Differential linearity error

Single ended

+3/–1

Differential

+4.5/–1

Integral linearity error

Direct

channel

Single ended

±11

Differential

±7

Fast channel

Single ended

±13

Differential

±7

Slow

channel

Single ended

±10

Differential

±6

ENOB

Effective number of bits

Single ended

12.2

Bits

Differential

13.2

SINAD

Signal-to-noise and

distortion ratio

Single ended

75.2

Differential

81.2

SNR

Signal-to-noise ratio

Single ended

77.0

Differential

81.0

THD

Total harmonic distortion

Single ended

Differential

1. Data guaranteed by characterization for BGA packages. The values for LQFP packages might differ.

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

3. ADC clock frequency = 25 MHz, ADC resolution = 16 bits, VDDA=VREF+=3.3 V and BOOST=11.

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