PPK2 accuracy

[Julien S]

I want to be 100% sure of my understanding about PPK2 accuracy.

https://infocenter.nordicsemi.com/topic/ug_ppk2/UG/ppk/ppk_measure_accuracy.html

For lowest range (100nA-50µA), what is accuracy ? Do I understand correctly it is “10% of reading + 2% of 50µA” ?

Meaning:

100nA +/-1.01µA

1µA +/-1.1µA

10µA +/- 2µA

Can you please confirm my understanding ? 

[haakonsh]

For lowest range (100nA-50µA), what is accuracy ? Do I understand correctly it is “10% of reading + 2% of 50µA” ?

No, the R1_Offset is the accuracy of R1_Resol, ie. +/- 2% of 200nA. R1_Resol is one ADC lsb. 

R1_Accuracy is the total measurement accuracy of the average of a large set of measurements. 

[Julien S]

Thank you, 
What are the test conditions ? i.e. how large is the set of measurement to achieve the 10% accuracy (simply your internal oversampling or 1s or 60s mean value) ?

Can you please confirm the reading is :

100nA +/-10nA

1µA +/-0.1µA

10µA +/- 1µA

Or do I need to add 2% of something ? 

[haakonsh]

You should not need to add 2% of 200nA, but by all means add +/- 4nA.