you can still use your opamp directly.. the problem here is that your gain will never be 0.5 but 1.5.
This bring at least few solutions. Forget the opamp, and use a simple voltage divider with 2 resistors + small capacitor (let's say 0.1uF) to smooth the signal noise...
OR a more fancy op-amp circuit + low pass filter. the whole thing must have a gain of 0.5.
Advantage to use an opamp in between... at least a higher input impedance... so you don't alter the signal.
Which voltage sources you have on hand? Is there any negative rails?
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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