Hello Brian, Thank you very much for help. You are right, the problem is in ADC SHT setup. When I changed it from SHT0_8 to SHT0_2 I achieved desired speed. (I actually did test routine entry by pin toggling, but with another frequency, so it looked like there was no problem with ADC, it was my oversight, sorry) But now I am concerned about accuracy of the ADC measured signal. I understood from what you wrote that the timing I set up with SHT0_2 is nearly enough for accurate measurement on 2 channels. There is also the issue with impedance matching, which I know very little about. Can you please suggest any reading material on this subject? Thanks again. Dragana
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