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MKM33 AFE Inputs below zero.

Question asked by Edriano Araujo on Jun 22, 2015
Latest reply on Jun 23, 2015 by xiangjun.rong

Hello.

I have been reading all the documentations regarding this micro-controller and its front end 24bits ADC.

There is a single or three Fase meter app that describe using a current sense transformer or coil. directly connected to the in+ and -.

Ok but how the converter deals with the negative input? maybe i am a little new to current or energy metering.

But at the transformer it has to be a negative voltage right?

 

For Voltage measure that is ok they shift the voltage input to vref/2 and its ok to read.

 

I would really appreciate some help. just understanding how it works.

 

thanks in advance.

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