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RE: [ts-7000] Re: MAX197 ADC interfacing

To: <>
Subject: RE: [ts-7000] Re: MAX197 ADC interfacing
From: "Marek Mierwald" <>
Date: Thu, 9 Feb 2006 08:31:45 -0500

Hello Phil,

 

I would be very glad to see these drivers.

Marek

 

 

-----Original Message-----
From: [ On Behalf Of Phil
Sent:
February 9, 2006 6:18 AM
To:
Subject: [ts-7000] Re: MAX197 ADC interfacing

 


Using one of the spare EP930x timers, I am actually getting quite
reliable and accurate timing for sampling signals at a rate of
~5.3kS/s. Also, although I haven't had a chance to test, I am hoping
that I will be able to do this across multiple channels (up to 6
channels, giving ~32kS/s total).

Which reminds me, I was going to see if anyone was interested in the
drivers that I have written for ADC sampling? Probably not terribly
robust yet, since I only have the one board to play with at the
moment, but could be useful nonetheless. Let me know if you are and
I will post them.

Cheers
Phil


--- In Jim Jackson <> wrote:
>
>
> On
Wed, 8 Feb 2006, Phil wrote:
> > --- In "ajbanand" <ajbanand@> wrote:
> > >
> > > Hi all,
> > >
> > > i have TS-7250 with MAX197 ADC.
> > > i am trying to provide voice support to my board using the ADC.
> > > i have configured my ADC for single channel usage..
> > > its not giving proper digital values for the analog input, i am
> > getting
> > > value like 0,5,17 etc all less than 100. for bipolar -5 tp +5
range
> > > these values all seem to be noise..
> > > can anyone please explain what could be wrong in my approach...
> >
> > If you reply with the code that you are using, you will get a
better
> > response from the members of this group. Without it, we can't
really
> > help.
> >
>
> Also it would be of use to know the circuit schematic for the
electronics
> feeding the input.
>
> However having said that, I can't see how you can reliably use the
MAX197
> for sampling voice or anyother signal > half the the Kernel HZ
value.
> Timing for the sampes will not be accurate enough, even though
sampling
> one input only, one can get sampling rates of upto 50K samples/sec
(If my
> memory if correct).
>
> Jim
>








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