Over-sampling with TMS320LF2407A

steve wrote:
> TI has an application note concerning oversampling hints and tips, as
> does a few other a/d manufacturers. Oversampling helps with noisy
> systems, either to achieve the published a/d resolution or to surpass
> it. This technique is very commonly used.
>

Can you point me to the application note?

Since this post, I have successfully oversampled and averaged my input
using the ADC. I haven't checked the percentage improvement, but I am
sure it has improved.

"Ajay" <ajaydsouza@gmail.com> wrote in message news:<1101789871.614717.57970@z14g2000cwz.googlegroups.com>...
> steve wrote:
> > TI has an application note concerning oversampling hints and tips, as
> > does a few other a/d manufacturers. Oversampling helps with noisy
> > systems, either to achieve the published a/d resolution or to surpass
> > it. This technique is very commonly used.
> >
> 
> Can you point me to the application note?

http://focus.ti.com/lit/an/spra461/spra461.pdf


silabs also has a good application note about oversampling see

http://www2.silabs.com/public/documents/tpub_doc/anote/Microcontrollers/Precision_Mixed-Signal/en/an118.pdf


> 
> Since this post, I have successfully oversampled and averaged my input
> using the ADC. I haven't checked the percentage improvement, but I am
> sure it has improved.

the tradeoff is you need a faster A/D and use more processor
throughput then you would otherwise need, so your not getting
something for nothing, I've see some people oversample by 1000, or
10,000.

steve