AD5934 questions - measuring inductive reactance

Document created by analog-archivist Employee on Feb 23, 2016Last modified by analog-archivist Employee on Feb 23, 2016
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AD9834: I have been going through the datasheet and this seems perfect device for my
needs, however i did not see explicit mentioning of measuring inductive
reactance. I am interested in setting up a test jig for 0.5H coils with a DCR
of about 30 to 40 ohms (ferrite core). It seems to me that this IC can perform
the task however I would like some sort of confirmation prior to purchase.

2nd question regarding the evaluation package. I've noticed that it comes
complete with PC software to conduct tests. I will be interested in lowering
the minimal measurable impedance by adding the buffer as suggested in the
datasheet, can I use the software to read these values or does it, from any
reason, support only values above 1Kohm?

 

In case of 470uH the measurement results looks fine - please see attached.

Please note that the limitation is not due to the software but the hardware.

This limitation has been overcome by using external buffers, refer to UG-364,
http://www.analog.com/static/imported-files/user_guides/UG-364.pdf

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