(Atmel) Power Debugger 1. ‘A’ channel high range: 100 mA - 500 μA, ~3 μA resolution.
2. ‘A’ channel low-range: 1 mA - 1 μA, ~30 nA resolution.
The sampling rate of the ‘A’ channel is 62.5 kHz and data is sent in 16-bit frames to the host computer. A calibrated
‘A’ channel has accuracy no worse than 3% down to around 1 μA.
The ‘B’ channel is the recommended channel for measuring higher currents with lower resolution than the ‘A’
channel. It is based on a single shunt resistor allowing measurement of current up to 1A and down to 1 mA.
1. ‘B’ channel single range: 1A, ~500 μA resolution.
Data is sampled at 62.5 kHz and transferred to the computer in 12-bit frames.
https://www.microchip.com/developmenttools/ProductDetails/atpowerdebugger