Just wondering if anybody else has used the DS2450 for a long time. I am using
one of these A/D's and I have found that after a while ~6-8 months all channels
have a ~0.3 volt offset from zero. ie all 4 channel readings go up by ~.3
volts. Its like the chips internal reference voltage somehow gets screwed up.
It's happened twice now over the last 18 months. The voltage being measured by
the inputs are isolated voltages and I have placed a cap across the inputs.
I had found by powering down the device and powering it back up sometimes it
would work normally for maybe a couple of days then the offset will return.
The offset does not slowly drift up, its a sudden step change and remains
constant. This time I am just going to subtract .3 volts from all 4 channels
and see if it repeats itself anytime soon.
Anybody else found this problem
cheers
rob
-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2005.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
_______________________________________________
Owfs-developers mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/owfs-developers
