STM32U375CE datasheet(150/222 Pages) STMICROELECTRONICS

150 / 222 page

Figure 39. ADC accuracy characteristics

(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

2n-1

Output code

VSSA

2n-2

2n-3

VREF+ (VDDA)

1 LSB ideal

(1)

(2)

(3)

(or

)]

[1LSB =

VDDA

VREF+

Figure 40. Typical connection diagram when using the ADC with FT/TT pins featuring analog switch function

Sample-and-hold ADC converter

Converter

Cparasitic(2)

Ilkg(3)

CADC

VDDA(4)

RAIN(1)

VAIN

RADC

VREF+(4)

VSSA

I/O

analog

switch

Sampling

switch with

multiplexing

VSS

(1): Refer to the ADCx characteristic table for the values of RAIN and CADC.

(2): Cparasitic represents the capacitance of the PCB (dependent on soldering and PCB layout quality) plus the

pad capacitance (refer to Table 86. I/O static characteristics for the value of the pad capacitance). A high Cparasitic

value downgrades the conversion accuracy. To remedy this, fADC must be reduced.

(3): Refer to Table 86. I/O static characteristics for the values of Ilkg.

(4): Refer to Section 5.1.6: Power supply scheme.

General PCB design guidelines

The power-supply decoupling must be performed as shown in the corresponding power

‑supply scheme. The

100 nF capacitor must be ceramic (good quality) and must be placed as close as possible to the chip.

STM32U375xx

Electrical characteristics

DS14861 - Rev 2

page 150/222

STM32U375CE Datasheet(PDF) 150 Page - STMicroelectronics

STM32U375CE Datasheet(HTML) 150 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL