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differential amplifier common mode output

Dear sir,
We are using ADA4927-1 device for our application. In our application input to ADA4927-1 is form a sensor having 
output in Differential mode. we want an output from ADA4927-1 in common mode configuration. we have gone through 
the AN-584 APPLICATION NOTE and we uderstand that we need to give input to PIN No. 2 VOCM form a potential divider.
we request you to give the information  how to take output from ADA4927-1 in common mode ( ie What to do for one of the unused 
pin No. 10 or 11 of ADA4927-1) and potential divider voltage to be  given to Pin. No. 2 of the Ada4927-1 for getting the common mode output.

please do the needful to me....


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  • Hello,

    Using a differential amplifier such as the ADA4927-1 for differential to single ended conversion is not recommend, as there is significant degradation in second harmonic distortion performance in this configuration. If this is what you are trying to do, you could look at the AD8221 instrumentation amplifier, but since you selected the ADA4927-1 to start with, you may have higher frequency requirements than what the AD8221 can deliver. Therefore I'd suggest you take a look at the AD8129/30, it is designed for differential to single ended conversion at wide bandwidths. For more information on differential amplifiers you may also want to look at our application note AN-1026.

    Regards

    John

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  • Hello,

    Using a differential amplifier such as the ADA4927-1 for differential to single ended conversion is not recommend, as there is significant degradation in second harmonic distortion performance in this configuration. If this is what you are trying to do, you could look at the AD8221 instrumentation amplifier, but since you selected the ADA4927-1 to start with, you may have higher frequency requirements than what the AD8221 can deliver. Therefore I'd suggest you take a look at the AD8129/30, it is designed for differential to single ended conversion at wide bandwidths. For more information on differential amplifiers you may also want to look at our application note AN-1026.

    Regards

    John

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