No, I'm using the TS-9441, which presents 0.85 volts and 2.5 volts on even and
odd pins.
________________________________________
From: on behalf of Jason
Stahls
Sent: Tuesday, March 08, 2011 1:09 PM
To:
Subject: Re: [ts-7000] TS-7400 EP9302 ADC channel switching
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On 03/08/11 12:54, Russell N. Nelson - rnnelson wrote:
> I'm having trouble reading two ADC channels in quick succession, or even in
> slow succession. Values from one channel bleed over into another channel. And
> it's not just my code, it's also the Technologics' test7400ADC. If you run it
> like this:
>
> while ./test7400ADC; do echo -n ''; done
>
> then sooner or later it craps out, and when it does, it prints a value that
> clearly came from a different channel. I've tried reading twice and
> discarding the first. inserting a 100ms delay betweeen these two reads, and
> it still happens. How can I fix this? I need to measure both voltage and
> current consumed, and I have the two sensors hooked up to ADC channels.
I don't mean to be condescending, but are you sure it's not a interface
issue? If you have any de-coupling caps or opamp buffers not biased
right ect it could bleed over due to induction. So does the reading you
get from the ADC match a scope/meter on the same lead?
- --
Jason Stahls
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