OP184: Offset nulling pins

Document created by analog-archivist Employee on Feb 23, 2016
Version 1Show Document
  • View in full screen mode

The OP184 has two offest nulling pins. What resistance should the nulling
potentiometer have, and where is its slider to be connected to?


For offset adjust, use a 20K resistor between offset null pins 1 and 5 with the
wiper to the negative terminal. The null range is +-1mV which is good for this
One thing you need to be aware of is that this is the Null at mid point. The
rail to rail inputs have a trip point where the NPNs and PNPs switch and the
offset is the highest. So even if we null at 0 common mode, the offset changes
with common mode.