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STM32L100 ADC Result Error On wakeup from Stop Mode

Question asked by boyarski.alon on Nov 24, 2014
Latest reply on Dec 1, 2014 by boyarski.alon
Hi,
   My application wakes-up from Stop Mode every 100mSec, takes ADC conversion from two channels in Scan mode to DMA then makes some processing. I get roughly +1.5% error. When i disable the Stop Mode but sampling remain in 100mSec intervals, the result seems correct.  If i add 2mSec delay after Wakeup, then also the results seems correct. I left the Vref module ON  (PWR_UltraLowPowerCmd(DISABLE)  to eliminate the 3mSec stabilization time when turning it ON, but this did not solve my problem. Any ideas please ?

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