STM32F091VCY6TR 查看數據表（PDF） - STMicroelectronics

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STM32F091VCY6TR

ARM®-based 32-bit MCU, up to 256 KB Flash, CAN, 12 timers, ADC, DAC, and comm. interfaces, 2.0 - 3.6V

STMicroelectronics 

Electrical characteristics

STM32F091xB STM32F091xC

2. ADC Accuracy vs. Negative Injection Current: Injecting negative current on any of the standard (non-robust) analog input

pins should be avoided as this significantly reduces the accuracy of the conversion being performed on another analog

input. It is recommended to add a Schottky diode (pin to ground) to standard analog pins which may potentially inject

negative current.

Any positive

accuracy.

injection

current

within

the

limits

specified

for

IINJ(PIN)

and

ΣIINJ(PIN)

in

Section

6.3.14

does

not

affect

the

ADC

3. Better performance may be achieved in restricted VDDA, frequency and temperature ranges.

4. Data based on characterization results, not tested in production.

Figure 26. ADC accuracy characteristics

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Figure 27. Typical connection diagram using the ADC

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069

1. Refer to Table 57: ADC characteristics for the values of RAIN, RADC and CADC.

2.

Cpapdaracsaitpicarceitparnecseen(rtsouthgehlcya7papcFi)ta. nAcheigohf

this, fADC should be reduced.

the PCB

Cparasitic

(dependent on soldering and PCB layout quality) plus the

value will downgrade conversion accuracy. To remedy

General PCB design guidelines

Power supply decoupling should be performed as shown in Figure 13: Power supply

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

close as possible to the chip.

DocID026284 Rev 4

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