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High accuracy measurement with AD7124-4

Question asked by Benjamin_KOSICKI on Jul 4, 2018
Latest reply on Jul 8, 2018 by harrynsc

Hi,

We are working on a MPPT Buck converter with a high accuracy required (1%) on global system.

So we are looking for a solution in order to reach an accuracy of 0.5% on current measurement and on voltage measurement on a noisy environment.

Main difficulty is we must reach an accuracy of 0.1% on the range from 0.3A to 10A.

Our preliminary solution for current measurement use AD7124-4 reference as describe below :

 

Our calcul permits to define 0.52% typical average accuracy on 400mA to 10A measure. However we have some doubts, do you have a design guide or reference design in order to help us  ?

Best regards,

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