STM32L053C6 datasheet(95/136 Pages) STMICROELECTRONICS

Part #	STM32L053C6

Description	Ultra-low-power 32-bit MCU Arm®-based Cortex®-M0, up to 64KB Flash, 8KB SRAM, 2KB EEPROM, LCD, USB, ADC, DAC

PDF	136 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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95 / 136 page

DS10152 Rev 9

95/136

STM32L053x6 STM32L053x8

Electrical characteristics

113

Figure 27. Typical connection diagram using the ADC

1. Refer to Table 62: ADC characteristics for the values of RAIN, RADC and CADC.

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

pad capacitance (roughly 7 pF). A high Cparasitic value will downgrade conversion accuracy. To remedy

this, fADC should be reduced.

General PCB design guidelines

Power supply decoupling should be performed as shown in Figure 28 or Figure 29,

depending on whether VREF+ is connected to VDDA or not. The 10 nF capacitors should be

ceramic (good quality). They should be placed as close as possible to the chip.

Figure 28. Power supply and reference decoupling (VREF+ not connected to VDDA)

MSv34712V1

VDDA

AINx

IL±50nA

RAIN(1)

Cparasitic

VAIN

RADC

12-bit

converter

CADC

Sample and hold ADC

converter

MS39601V1

VREF+

STM32Lxx

VDDA

VSSA / VREF–

1 μF // 100 nF

STM32L053C6 Datasheet(PDF) 95 Page - STMicroelectronics