> > Are there any drawbacks to setting the voltage divider to > > kick out say 7V at ±15V (which would be a bit over 5V ±12V), > > and then have a zener limit the output to +5.1V or 4.7V? Simpler is to just use a series R between the opamp and the ZD. This can give you reasonable clamping without drawing too much current. Ian