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Altera_Forum's avatar
Altera_Forum
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9 years ago

Increasing range Highspeed AD/DA Card

In order to decrease the range of the ADC (I'am using the Highspeed AD/DA Card hsmc model) we found in the data sheet of the adc manufacturer that you simple need to reduce the supply voltage. Is ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

Thanks for your reply.

In order to clarify:

*)Basically the thing i trying to do is decreasing range to increase resolution: (this was maybe not correct mentioned in my introduction post sorry for that)

*)In the datasheet of the manufacture (http://www.analog.com/media/en/technical-documentation/data-sheets/ad9248.pdf) of the adc chip is mentioned the following

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The input span of theADC tracks reference voltage changes linearly. If the ADC isbeing driven differentially through a transformer, the reference...

page 20 of 48

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so I suppose the by varying the source voltage I'm able to change range (and so to change resolution more bits for less voltage => I would like to use them with smaller signals)

The question is now can I do did in a proper way on the Highspeed AD/DA Card board? (http://www.terasic.com.tw/cgi-bin/page/archive.pl?language=english&categoryno=67&no=278)

Best regards.

Bert.