Battery Monitoring using voltage divider with ADC pin.

[SPraj.15]

Hello,

Here i am new to battery voltage monitoring using ADC for STM32F030.

i have some query related to battery monitoring with ADC pin.

1) as mention in datasheet external input impedance(Rain) is 50k, how can i achieve matching impedance using voltage divider with minimum current drain.

2) how to calculate ADC Clock frequency for this STM32F030.

3) how capacitor help in matching impedance.

4) what value of resistor in divider should i have to select for matching impedance.

any document related to calculation of impedance matching than please share.

[waclawek.jan]

https://community.st.com/s/question/0D50X00009sUpxcSAC/battery-sensing-on-adc-pin-

https://community.st.com/s/question/0D50X00009sVLEWSA4/measuring-lipo-battery-voltage-on-adc-pin

[AvaTar]

Perhaps someone finds a way around the laws of physics for the OP...