Hello,
I have a dac8871 that is being used with an SBC. I'm using the dac to send a signal to a galvo drive. My reference input values are at -10V to +10V. The DAC uses 16 bit resolution, and it works very well above -8.5V. However, when I send it a value that corresponds to a voltage below about -8.5 volts (between -8.5 and -10), I see the voltage drift in the positive direction at a rate of no more than 0.1 v per minute, but it does seem to eventually stabilize near -8.5v.
I've gone through and checked that all our voltages (especially our references) are staying stable, and have confirmed that there are no changes there.
With all of this in mind I am at a loss for what is causing this issue, and I can't seem to find anything in the setup that would cause an issue like this.
Any help would be greatly appreciated.
Christian.