DS1620 Temperature sensor and Basic Stamp (accuracy)

Joe

Hi,

I am using the Basic Stamp 2 with the DS1620 temperature chip
code.

I need to read in Celcius and about 0.5 accuracy.

The example code is working at 1.0 accuracy , do you know
if other customers have more accuracy ?



thanks , Joe

Beau Schwabe

Joe,

Here are a couple of threads that might help.
http://forums.parallax.com/showthread.php?p=606317
http://forums.parallax.com/showthread.php?p=608042

In High Resolution mode, the resolution is:
0.0625°·C
0.1125°·F

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Beau Schwabe

IC Layout Engineer
Parallax, Inc.

Tracy Allen

Here is another reference:
www.emesys.com/OL2d1620.htm

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Tracy Allen
www.emesystems.com

markuster

Thanks,

Tracy, I have load your code and at the beginning it doesn't work.
But after I deleted a code line the DS1620 worked.

Your code is very good and I am afraid that your code
line (please see attac.) is there for a reason.

What do you think ?

Thanks, Mark

Tracy Allen

You have substituted a PAUSE 1000 for the loop that tests the busy/done flag, and that's fine.

I'm not sure what might be wrong with the original code. The $AC command requests the status byte, and bit 7 is of that byte is the busy(0)/done(1) flag. Dallas Semi did make some revisions in the chip, but I don't recall seeing anything about that flag. Hmmm.

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Tracy Allen
www.emesystems.com