Principle of operation of AD534KH

Hi Johny,

That is a very large question - it all depends on your requirements, so I have to make assumptions - I assume you mean accuracy of frequency vs. input voltage.

BTW the AD639 is obsolete so I wouldn't want to spend time responding with comments on obsolete parts. This leaves just the AD534, which has a an application circuit you can use for a reference. Here the accuracy can be estimated using dc error values such as Vos, multiplier accuracy, etc. I don't have such a study to pass on to you but I suspect you get the idea.

If you want the most accurate method I would recommend a DDS (direct-to-digital synthesizer). I found a Wiki reference which looks pretty good to me, ADI does make such devices and I've attached a link to a selection guide. After you study the info from Wiki, check out the ADI product data sheets. I am not the apps person for DDS products but you can inquire as to the right person on our website.

Direct digital synthesizer - Wikipedia, the free encyclopedia

http://www.analog.com/en/products/rf-microwave/direct-digital-synthesis-modulators.html

Best,

js

Hi Johny,

That is a very large question - it all depends on your requirements, so I have to make assumptions - I assume you mean accuracy of frequency vs. input voltage.

BTW the AD639 is obsolete so I wouldn't want to spend time responding with comments on obsolete parts. This leaves just the AD534, which has a an application circuit you can use for a reference. Here the accuracy can be estimated using dc error values such as Vos, multiplier accuracy, etc. I don't have such a study to pass on to you but I suspect you get the idea.

If you want the most accurate method I would recommend a DDS (direct-to-digital synthesizer). I found a Wiki reference which looks pretty good to me, ADI does make such devices and I've attached a link to a selection guide. After you study the info from Wiki, check out the ADI product data sheets. I am not the apps person for DDS products but you can inquire as to the right person on our website.

Direct digital synthesizer - Wikipedia, the free encyclopedia

http://www.analog.com/en/products/rf-microwave/direct-digital-synthesis-modulators.html

Best,

js