Re: [avr-chat] will an avr be fast enough...

[Curtis Maloney]

Derric Tubbs wrote:
> Hello, all, complete AVR newb here.
>
> Looking at all this math, are we talking about a
> legitimate scenario here?  I mean, can you possibly
> fit 16 channels worth of 10bit ADC data down a 38khz
> IR pipe???  Are you going to be processing this data
> such that it gets broken down significantly?

No, you are absolutely right.  After doing all the input bandwidth math, I 
totally forgot that those IR demodulators are limited to around 2433bps.

> Also, are you locked into using the MAX1031?  There
> are AVRs with 16 channels of 10 bit A2D built in.

An excellent point.  However, from what I recall, that's only one ADC with a 
16channel switch, and the OP may want 16 samples taken in parallel.  Also, the 
ADC may not have quite the correct characteristics as the OP wanted.  Another 
thing to check is the maximum sample rate - I recall from one of our projects 
that it requires a number of clocks to settle for each sample, and for best 
results requires the CPU clock to be halted.

> Sorry, but my "input" is more for my own learning as
> you've raised my curiosity.  I can't offer much help
> with my limited knowledge.

Isn't that half the point of this list? :)

--
Curtis Maloney