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Issues  with EVAL-AD7294-2SDZ Current Sensor

Question asked by Arne_2 on Dec 21, 2014
Latest reply on Jan 7, 2015 by Arne_2

Hello,

 

I have both, the EVAL-AD7294-2SDZ and the EVAL-AD7294EBZ.

I got the EVAL-AD7294-2SDZ because it allows me to interface to the I2C without cutting traces.

However, I don't seem to get the Current Sensors to work properly.

It does however work in the EVAL-AD7294EBZ.

I do exactly the same setup as with the EVAL-AD7294EBZ. I modified the on-board sense resistors to be identical.

I also added a 1uF capacitor to suppress unwanted noise.

What I get is an extremely noisy data stream as long as the sense voltage is within +/-200mV.

I did make sure that all parts of the AD7294-2 are powered on.

Is there anything else that I need to do? Is there a bug in the eval software?

 

Regards and thanks in advance,

Arne

 

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