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Problem with AD536AK rms to DC converter

Question asked by Illenyi on Feb 12, 2014
Latest reply on Aug 10, 2015 by donajaykrishna

Hello,

 

I've got a little problem with calibration of AD536 rms to DC converter!

I built the schematic as you can see in attached, dual +/- 4,5V power supply!

 

To adjust the output offset voltage I grounded the input Pin1 and tried to adjust the output offset!

But I measure ~2.0V on Pin6 and I can not eliminate with R4 trimmer!

 

Could anybody help to me, what is the problem?

 

The datasheet sad, on Pin6 (output) the Rload valeu should be between 1K...10K, and in my schematik the Rload is 200K!

Can it be the problem?

 

Thank you so much your help!

 

Kind regards,

Balint

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