www.ShoppingPodder.com

Leading Computer Shopping,
News and information
Part of the Identityscape.com network...

getxfactor.com jmoodmusic.com smartbusinesschoices.com mintdepot.com lowfaresalways.com evangelicalview.com shoppingpodder.com soproudlywehail.com webnews.ws currenthumor.com

 

 

Measure INL ADC
   Shopping Podder - the Best of Computer Postings! Forum Index -> Computer - DSP  
View previous topic :: View next topic  
Author Message
NN
Guest
PostPosted: Mon Nov 17, 2008 8:39 pm    Post subject: Measure INL ADC Reply with quote
Hello,

I am trying to measure INL for a 12 bit ADC. With the histogram
method the amplitude and offset of the ideal sine wave matters a lot
to get a good INL.
So, I tried a ramp histogram method. With this method, for 12 bit ADC
we used a linearly increasing voltage source to emulate a ramp. For a
12 bit ADC I used 4096 voltage points initially to get a DNL and then
computed INL from the DNL, the INL looked very bad. So I tried using
just divided the voltage range to a 100 points and INL looked much
better and less than 1LSB. I was hoping they should be nearly the same
except more number of points makes the INL smoother.
What am I missing? I will really appreciate any help.

Thanks,
Neena
Back to top
Rune Allnor
Guest
PostPosted: Wed Nov 19, 2008 7:01 pm    Post subject: Re: Measure INL ADC Reply with quote
On 17 Nov, 21:39, NN <neena.namb...@gmail.com> wrote:
Quote:
Hello,

I  am trying to measure INL for a 12 bit ADC. With the histogram
method the amplitude and offset of the ideal sine wave matters a lot
to get a good INL.

I don't know much about testing ADCs, but Rick Lyons shows
a method in his 'Understanding Digital Signal Processing.'
Maybe this method works better?

Rune
Back to top
Display posts from previous:   
   Shopping Podder - the Best of Computer Postings! Forum Index -> Computer - DSP  
Page 1 of 1
All times are GMT

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum