STM32L433CB datasheet(166/227 Pages) STMICROELECTRONICS

Part #	STM32L433CB

Description	Ultra-low-power Arm® Cortex®-M4 32-bit MCUFPU, 100DMIPS, up to 256KB flash, 64KB SRAM, USB FS, LCD, ext. SMPS

PDF	227 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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166 / 227 page

Electrical characteristics

STM32L433xx

166/19

DS11449 Rev 7

Figure 32. Typical connection diagram when using the ADC with FT/TT pins

featuring analog switch function

1. Refer to Table 76: 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 70: I/O static characteristics). A high Cparasitic value will downgrade

conversion accuracy. To remedy this, fADC should be reduced.

3. Refer to Table 70: I/O static characteristics for the values of Ilkg.

4. Refer to Figure 18: Power supply scheme.

General PCB design guidelines

Power supply decoupling should be performed as shown in Figure 18: Power supply

scheme. The 10 nF capacitor should be ceramic (good quality) and it should be placed as

close as possible to the chip.

MSv67871V3

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

STM32L433CB Datasheet(PDF) 166 Page - STMicroelectronics