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Current measurement from 0.1uA to 1A
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sandy.holmarc:
hello
is it possible to get high precision current measurement (0.1uA to 1A) with a  low value shunt resistor?.

IanB:

--- Quote from: sandy.holmarc on December 03, 2018, 07:31:01 am ---hello
is it possible to get high precision current measurement (0.1uA to 1A) with a  low value shunt resistor?
--- End quote ---

From 0.1 µA to 1 A is a range of 107 orders of magnitude.

If you want a precision of 0.1 µA it means you want to tell the difference between 0.9999999 A and 1.0000000 A

Have you thought about what you are asking?
sandy.holmarc:
Hi IanB,
 I developed a circuit with shunt resitors 25K ( 0.1uA -0.1mA),250R (0.1mA-10mA),2.5R (10mA to 1A).I got result with these resistors .But i need a low value resistor to read all the current to use in a closed loop.Can you please tell me about any method to achieve this (0.1UA to 1A)measurement  .
nsrmagazin:
No. Especially with a small value resistor.
Gyro:

--- Quote from: IanB on December 03, 2018, 07:45:17 am ---... is a range of 107 orders of magnitude.

--- End quote ---

Thats a lot of orders of magnitude.  ;D
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