Teensy 3.6 ACD current leakage

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aalsubhi

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Hi everyone,
I tried to use Teensy 3.6 as a data logger. The device that I tried to monitor operates at 2V. so, I used Teensy's ADC pins for monitoring the VCC level and other senors' gates on my device under test. My device is powered with a solar cell. I noticed that attaching Teensy to my device result in huge power consumption compared to using the oscilloscope. My question is: Does ADC circuit responsible for this consumption? Teensy is powered using USB.
 
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