Potentiometers?

Status
Not open for further replies.

mcc

Well-known member
Hi,

what is a recommended value of the resistance of a potentiometer, which I want to
use to be read by the ADC of a battery driven Teensy 3.6 to influence parameters
of a program ?

I want to add a couple of potentiometers...not only a single one... :)

Thanks for any help in advance! :)
Cheers
Meino
 
Due to the input impedance of the SAR ADCs which varies during the conversion cycle, a relatively low resistance of the potentiometer is required. An application note from NXP recommends 5k or 10k. In addition, they recommend adding a 10nF capacitor from the pot wiper to GND, placed as close as possible to the processor’s analog input pin.
 
Hi Theremingenieur,

thanks for your help! :)

5k...10k is quite low for a battery powered device with lot of pots...
Will see...

Cheers!
Meino
 
Status
Not open for further replies.
Back
Top