leakage current nRF52840 GPIO pin P0.17

[MBAZA]

Hello every one hope you re all good 

we use the nRF52840 and we want to know the leakage current in the pin P0.17, i think it's not mentioned in the datasheet !

infocenter.nordicsemi.com/.../nRF52840_PS_v1.1.pdf

Regard, 

[ketiljo]

There's no leakage current to be concerned off. The impedance of the pin is several Mohm's.

[MBAZA]

thanks for your response man,
Yes, but we need to know how much (I know it is negligible)

[ketiljo]

The input impedance is >10 Mohm. So in the pA range then. 

Curious how this is important? An ADC input is very different from a GPIO when is samples the pin. It will behave like a cap that's being charged when the sampling starts

https://infocenter.nordicsemi.com/topic/ps_nrf52840/saadc.html#concept_using

This has far more impact on the behavior that the leakage current. 

Also see this for a reference:  Measuring Lithium battery voltage with nRF52 

[MBAZA]

Yes i agree, but as you see in the datasheet the pin p0.17 you can configure it as an input gpio what about the leakage current in this case ?

[ketiljo]

Same thing, still >10 Mohm

[MBAZA]

how did you know it (the source)