Jason, you seem to be getting a little excited by some of the comments that people are honestly trying to help you with.

Steve gave you the generic first order low pass filter equation which is what I've used for years. Yes, it is DSP.

Since you're using a dual slope conversion, one would expect you'd be getting similar performance to a 7106 style converter. If my memory serves me correct, a TC500 is the analog front end and requires you to supply the timing and control. If this is the case, you might find that you have more timer bits than what the analog front end is capable of resolving, so it could simply be that you're expecting too much from the system. One of my products uses a aduc834 which has a 24bit converter - I only get to use 14 of them. I could average the samples and gain a few more bits, but like you, I don't have the time to do this. Nevertheless, 14 bits is adequate for the application. But also be aware that noise and thermal effects may be causing you grief.


Why is the apostrophe so miss used today?