At 14:57 14/05/97 -0400, Walter Banks wrote:
>Gerhard Fiedler wrote:
>> At 07:35 14/05/97 +0200, E-Labor wrote:
>> >Hi, anyone here with an application for controlling a
>> >10-16bit ADC with a pic 16c84.
>> >if yes would you please reply to me...
>>
>> In the next weeks I will write an interface to the LTC1288
>> (12bit serial low power ADC) for the 16LF84.
>
>> You may participate...
>
>Gee,  thanks!

You're welcome! :-)  --  That's something different than Thorsten E-Labor
wrote:

"Would you please sent it to me if you are ready?"  :-(


>How fast do you need the conversion?
>
>There are some low speed conversion methods that involve very
>little hardware that trade conversion speed for time and can
>get 10 to 12 bits of accuracy. At least one of these schemes
>can with a little cleverness return the results scaled to the
>problem units.

Not fast at all, minimum 10/sec, but I want the PIC not too occupied, to be
able to other things. (The timer is still available though...)

My main concern was space (the 1288 is 8pin SO with almost no external
components) and current consumption (200uA typ, 400uA max @3V), besides
ease of implementation and guaranteed precision without a lot of
experimenting. The price difference is almost negligible in my app (as the
end price of the unit will be dictated mostly by a lot of optics and
mechanics and manufacturing costs, and is quite high in comparison to the
electronic parts).

Scaling to the problem units is not necessary/possible, since the
relationship is not linear and I have to do some table lookup anyway.

But if you have a suggestion for a real simple 12bit ADC, already tested
with good results, I sure would like to hear about it. One thing to
mention, I run on 3V.

Thanks for your interest,

Gerhard