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Precise ADC for STM32F4

Question asked by hamza.ameer.001 on Sep 8, 2015
Latest reply on Sep 10, 2015 by waclawek.jan

I want to have precise ADC readings on stm32f4 for my project work but it always give me about 1% of error. For example if i take 0 V reading by grounding 12bit ADC it gives readings in between 0-15 (out of 4095 steps).
Also attached is the wave generated from DAC and i take its reading from ADC and ploted in QT through Virtual Com Port. as you can see there are some fluctuation in values even when voltage is constant.F4_ADC_QT_VCP.JPG
Is there any way to precise the adc values just like in STM32F3 we have ADC calibration but it is absent in STM32F4. Or is there any channel which is more accurate than others in F4.

Many Thanks.