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Hello, I am acquiring AC signal using STM32F303Re board. ADC values are getting saturated at 1.8V however i didnt change the reference voltage its using same reference as VDD. I have checked the same code with DC voltage it working fine but for AC its not

PDesh.4
Associate

‎2022-07-12 07:34 AM

 
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waclawek.jan
Guru

‎2022-07-12 08:07 AM

You need to feed a relatively low impedance signal into ADC (or increase sampling time).

JW

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