I am looking for a instrumentation, single supply op-amp for amplifying the signal from a loadcell.
When I did scales, we used a chopper stabilized op amp in the front and to make this '51 related we had to replace the oscillator driving the chopper with a T2 output since the chop had to be synchronous with the a/d in order to get stable readings. Never really found out why, but we tried several options and this was the only one that worked.

Erik