[SSassen]

IVX,

I think I have your email somewhere and I apologize for not answering sooner, but I've been busy at work, you know how it goes. The 120K impedance at the input, and the resulting noise, is due to the fact that the inputs are not meant to be used as a analog comparator, but rather as a digital one. I've documented that here in this forum a few times, hence we use a analog comparator before its inputs to feed it with a digital signal +/- 5-volts rather than a analog one.

Also, if possible, we'd like to see what you have done with your design, would you mind posting a schematic? And if you have done any measurements we'd like to see those as well, as they will be helpful to our own design we're trying to complete here.

Regards,

Sander Sassen
http://www.hardwareanalysis