STM32G47PBY3XXX datasheet(147/229 Pages) STMICROELECTRONICS

147 / 229 page

DS12712 Rev 3

147/229

STM32G473xB STM32G473xC STM32G473xE

Electrical characteristics

194

Figure 28. ADC accuracy characteristics

Figure 29. Typical connection diagram using the ADC

1. Refer to Table 61: ADC characteristics 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 54: I/O static characteristics for the value of the pad capacitance). A high

Cparasitic value downgrades conversion accuracy. To remedy this, fADC should be reduced.

3. Refer to Table 54: I/O static characteristics for the values of Ilkg.

General PCB design guidelines

Power supply decoupling must be performed as shown in Figure 16: Power supply scheme.

The decoupling capacitor on VDDA must be ceramic (good quality) and it must be placed as

close as possible to the chip.

(1) Example of an actual transfer curve

(2) The ideal transfer curve

(3) End point correlation line

4095

4094

4093

4093 4094 4095 4096

ADC code

1 LSB IDEAL

MS60205V1

Vin/VREF*4096

(1)

(3)

(2)

= total unajusted 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.

= differential linearity error: maximum deviation

between actual steps and the ideal ones.

EL = integral linearity error: maximum deviation

between any actual transition and the end

point correlation line.

MS33900V6

Sample and hold ADC converter

12-bit

converter

Cparasitic

(2)

Ilkg

(3)

CADC

VDDA

RAIN

(1)

VAIN

AINx

RADC

STM32G47PBY3XXX Datasheet(PDF) 147 Page - STMicroelectronics

STM32G47PBY3XXX Datasheet(HTML) 147 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 Descarga

Enlace URL