stopping voltage while in power on reset

[tanderson]

Im using the dac AD5324 using a 0 to +5v range, and then converting the output to bipolar -5v to +5v. MY main problem is the power on reset sets the value in the dac to 0v, which gives an output of -5v after it has been converted into a bipolar value. I need to stop all voltage out while in reset mode to prevent this happening, and then allow voltage flow as soon as it comes out of reset. does anyone have any ideas of how to do this? (keeping in mind i will need 0v as a value after rest, so a zener is not really an option)

Thanks

 

[IRstuff]

Depends on your level of pain.

> convert to DAC with bipolar output
> gate power to amp during reset

TTFN

 

[nbucska]

If I remember correctly 100000.... corresponds to zero --
so reset the regiter and XOR its MSb with + POR.


<nbucska@pcperipherals DOT com> subj: eng-tips