Microamps in oscilloscope?

[BasePointer]

Hi,

I have a battery powered application. It consumes about 1-20uA current. I want to see this current values in oscilloscope. Do you know a probe for microamps?

Thank you.

 

[Siniša]

10kΩ resistor would make 10mV to 200mV drop that would be visible on the scope. If you require this drop any lower, you should use amplified probe.

 

[BasePointer]

10kΩ resistor would make 10mV to 200mV drop that would be visible on the scope. If you require this drop any lower, you should use amplified probe.

I have a MCU that sleeps and wakes up every seconds in my circuit. It consumes variable curent between 1uA-5mA. Their average is about 16uA. I want to see its comsumed current-time graphics. Can you suggest a amplified probe to me?

10x

 

[vesskov]

Nowdays DC current probes have limit of ~1mA (with 1mV/div osciloscope).
And this sollution is not very cheap ($3000 probe + amplifier). You can obtain one of this and add some second amplifier, but I think it's not so easy.
So, using pure DC current probe in few 1uA/div should be very expensive.

I suggest to try some trick like sensing (small) resistor+amp+filter+amp.
You can take a look at MAX472 (with external resistor)

 

[BasePointer]

You can take a look at MAX472 (with external resistor)

10x a lot