AN2979 datasheet(7/12 Pages) STMICROELECTRONICS

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AN2979 Arkusz danych(PDF) 7 Page - STMicroelectronics

Numer części	AN2979

Szczegółowy opis	Implementing a simple ADC using the STM8L101xx comparator

PDF	12 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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7 / 12 page

AN2979

Hardware description

Doc ID 15651 Rev 1

7/12

Hardware description

Figure 6.

Circuit diagram

STM8L101 evaluation board settings:

■ Remove jumper JP2 to connect an external input voltage instead of the potentiometer

input. With the potentiometer RV1, the value is limited to 0.8 V and the signal is noisy (due

to the LCD). So the display on the LCD screen would not be stable.

■ Connect the external ADC voltage input directly to PD2.

■ Ground together the evaluation board and the external ADC signal.

■ An accurate 3.3 V MCU voltage can be tuned on the evaluation board using RV4.

(COMP2_CH3)

PA6

(COMP_REF)

R=10 kΩ

C=100 nF

STM8L10x

PB0

PC4

VSS

PD2

VDD

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