when getting ADC value, RMS processing is necessary needed?

[DU2]

Hello, I am using LO31K6 for sensoring two ADC channels by DMA

When I wish to get trustable voltage value, Do I have to apply Root Mean Square to these ADC value?

for example, < Instead directly get ADC value from DMA buffer[n] and treat as it is true > ,

when I got ADC value for 300 times, counting from DMA interrupt,

save these ADCvalues [300] , then sqaure( ^2) each of them, then adding them, and do sqrt (root), and get final voltage result

that result value will be more trust-able ?

[Peter BENSCH]

Trustable value?

Generally it depends on how you set up the ADC parameters, how you route the signal to the ADC, etc.

Did you read the appnote AN4629: ADC hardware oversampling for STM32L0 and L4?

What about AN2834: How to get the best ADC accuracy in STM32 microcontrollers?

Good luck!

/Peter

[TDK]

> that result value will be more trust-able ?

No, don't do averaging by RMS. Just take the average.