The LF111 LF211 and LF311 are FET input voltage comparators that virtually eliminate input current errors Designed to operate over a 5 0V to g 15V range the LF111 can be used in the most critical applications The extremely low input currents of the LF111 allows the use of a simple comparator in applications usually requiring input current buffering Leakage testing long time delay circuits charge measurements and high source impedance voltage comparisons are easily done