hi @all, i'm not sure if i should use gnd or agnd and if so where ? thx for hint
F fu4711 Member Jun 24, 2019 #1 hi @all, i'm not sure if i should use gnd or agnd and if so where ? thx for hint Attachments gnd_agnd.png 19 KB · Views: 48
F fu4711 Member Jun 24, 2019 #3 thx I had a mistake in the attached plan, is that right or is it too much ?
Theremingenieur Senior Member+ Jun 24, 2019 #4 Following the Kinetis application note, the source impedance should be relatively low for precise ADC readings. That’s why I’d suggest making the voltage divider 5k/10k instead of 10k/20k. And yes, this wiring variant looks much more efficient.
Following the Kinetis application note, the source impedance should be relatively low for precise ADC readings. That’s why I’d suggest making the voltage divider 5k/10k instead of 10k/20k. And yes, this wiring variant looks much more efficient.