does anybody now how many noise the AD630 itself added to the output signal? I now that this is depending on noise but there is no spectral density curve given in the datasheet.
For every hint I would be grateful.
Hi again Chris,
Thanks again for the interest in the AD630, I was wondering if you have a specific application in mind? By that we usually mean, is the AD630 headed for a product of some kind?
The AD630 was developed back in the mists of time and well before my joining the company. I understand it was designed for a specific application, an LVDT system used as a location detector for antenna masts. As such, the principle application was as a synchronous detector. If you think of how this works, it's basically an analog averaging circuit where correlated information is filtered from noise. Although the input from such a signal source may be quite low, the correlated frequency information is always higher than noise, resulting in a high (S+N)/N ratio.
If you are in a favorable situation, you might find it interesting to measure the spectral noise density for your edification.
Hi JS ,
thanks for your reply. I'll use the AD630 for absorption mesurement in the range of XXµV. If it's could be necessary I'll measure the spectral noise density.
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