STM32F769AI datasheet(172/255 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F765xx STM32F767xx STM32F768Ax STM32F769xx

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DocID029041 Rev 4

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 5.3.20 does not affect the ADC accuracy.

Table 74. ADC static accuracy at fADC = 36 MHz

Symbol

Parameter

Test conditions

Typ

Max(1)

1. Guaranteed by characterization results.

Unit

Total unadjusted error

fADC =36 MHz,

VDDA = 2.4 to 3.6 V,

VREF = 1.7 to 3.6 V

VDDA − VREF < 1.2 V

±4

±7

LSB

Offset error

±2

±3

Gain error

±3

±6

Differential linearity error

±2

±3

Integral linearity error

±3

±6

Table 75. ADC dynamic accuracy at fADC = 18 MHz - limited test conditions(1)

Symbol

Parameter

Test conditions

Min

Typ

Max

Unit

ENOB

Effective number of bits

fADC =18 MHz

VDDA = VREF+= 1.7 V

Input Frequency = 20 KHz

Temperature = 25 °C

10.3

10.4

bits

SINAD

Signal-to-noise and distortion ratio

64.2

SNR

Signal-to-noise ratio

THD

Total harmonic distortion

1. Guaranteed by characterization results.

Table 76. ADC dynamic accuracy at fADC = 36 MHz - limited test conditions(1)

Symbol

Parameter

Test conditions

Min

Typ

Max

Unit

ENOB

Effective number of bits

fADC =36 MHz

VDDA = VREF+ = 3.3 V

Input Frequency = 20 KHz

Temperature = 25 °C

10.6

10.8

bits

SINAD

Signal-to noise and distortion ratio

SNR

Signal-to noise ratio

THD

Total harmonic distortion

1. Guaranteed by characterization results.

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