STM32L082KB datasheet(94/132 Pages) STMICROELECTRONICS

部件名	STM32L082KB

功能描述	Ultra-low-power 32-bit MCU Arm®-based Cortex®-M0, up to 192KB Flash, 20KB SRAM, 6KB EEPROM, USB, ADC, DACs, AES

PDF	132 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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94 / 132 page

Electrical characteristics

STM32L082xx

94/132

DS10688 Rev 7

Figure 26. 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 57: I/O static characteristics). A high Cparasitic value downgrades

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

3. Refer to Table 57: I/O static characteristics for the value of Ilkg.

4. Refer to Figure 9: Power supply scheme.

General PCB design guidelines

Power supply decoupling should be performed as shown in Figure 27 or Figure 28,

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

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

MS39601V1

VREF+

STM32Lxx

VDDA

VSSA / VREF–

1 μF // 100 nF

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