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STM32F205zc ADC scan mode singel crosstalk problem

Question asked by strauss.bar on Dec 16, 2014
Latest reply on Dec 16, 2014 by Clive One
I have a problem of crosstalk between sequence channels scan automaticly on the ADC3,2 of the MCU. It is look like it is depend on the sequnce of the sample becase the voltage changes on the first scan channel influence the second one scan but not vice versa. So it is look like the internal sample cap didn't discharge between the sampling. So I prolong the sampling time for each of them from 3cycles to the maximum of 480cycles and also lower the ADC clk from dev2 to div8 but didn't help.
1. Is someone see that phenomena and get to solve it?
2. Is there anther setting can reduce this influence?
Thanks
Bar.

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