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shilliard

4 Posts
Posted - 10 Feb 2004 :  10:51:33  Show Profile
Is the VRef pin an input or output? Is it possible to adjust its value to say 1.2V instead of 2.5V?

Thanks

akidder

1519 Posts
Posted - 10 Feb 2004 :  11:08:54  Show Profile
Vref is an output. It's the reference voltage used for the ADSmartIO A/Ds. You can't draw any power from it, but you can use it as a reference.

You could get 1.2V from it via a high-impedance voltage divider, but make sure you're not drawing any more than 100uA through the divider.

I guess it's possible that we could change the reference voltage to be 1.2V, if that's what you're asking. It would require a special factory configuration of your device. If you're interested, let us know the details of what you're trying to do.

Cheers, Drew
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