Цитата
If Pins 5 and 6 are not used, they
should be shorted together. If they are connected to a
trim–pot, the trim–pot should be located no more than a few
inches away from the LM211, and a 0.01 µF capacitor should
be installed across Pins 5 and 6. If this capacitor cannot be
used, a shielding printed–circuit foil may be advisable
between Pins 6 and 7. The power supply bypass capacitors
should be located within a couple inches of the LM211.
..Правда, я не соединял ничего ни с чем, висели эти пины в воздухе..
Работало..

Надо будет замкнуть, для разнообразия..