AnsweredAssumed Answered

ADC does not read voltage linearly

Question asked by Yuval Klein on Feb 13, 2018
Latest reply on Feb 14, 2018 by Yuval Klein

Hi,

 

I using STM32F103 and I'm measuring voltage on PB1 (AIN9) using ADC1.

As seen in the table below the ADC readouts in 1.59V and 1.34V are basically the same. It seems the turn point is around 1.49V.

Can anyone help please.

 

AIN9 (V)ADC Value
1.1922185
1.2192140
1.2712100
1.3052060
1.3412030
1.3782010
1.3852000
1.43031965
1.4351930
1.4811895
1.4821880
1.5031880
1.511900
1.5962030
1.7322290
1.8612545

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