nRF51822, what is the input current/impedance

Question

I am sure I missed this in the docs - thanks.

Petter Myhre · Accepted Answer

The input impedance for a digital input pin is close to infinity when it's configured as an input, and to zero when it's configured as an output. 
 The analog input pins belong to the ADC, and the prescaler setting will affect their input impedance. 
 
 EDIT 2016.03.29: New values can be found in the nRF51 Reference Manual V3.0 , Chapter 31.1.3: 
 
 Prescaling 1/1: Mean impedance 129.7 kΩ Standard deviation 2.74 kΩ 
 Prescaling 2/3: Mean impedance 194.6 kΩ Standard deviation 4.1 kΩ 
 Prescaling 1/3: Mean impedance 389.2 kΩ Standard deviation 8.2 kΩ 
 
 
 The inputs also have some capacitance, 3-4pf.

nRF51822, what is the input current/impedance

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