Jens, David gave you sound advice. A voltage regulator fitness for a given task is not only related to precision. It also has to do among other things with repeatability (its ability to reach a voltage every time it is started), and what I think could be generating problems to you, regulation as a function of the load. We are talking of 10 bits, what means we are talking of ~5 mV per bit full scale assuming 5 volts full scale. I think that if for some reason you don't want to use the internal ref (I can't imagine why, but I'm not in your shoes), then you can always use some cheap reference or shunt regulator like the venerable TL431. Also, be very careful with the ground layout. This things are disturbed by the movement of a mosquito wing ;)
Gaston On Oct 12, 4:46 pm, Jens Boos <[email protected]> wrote: > And another follow-up: I realised my offset was in fact a linearity > error, so I tweaked a little bit, and a correcting term of 0.004 / Bit > did the trick. Is this ethical? ;-) > > Jens -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
