LF111

LF111 LF211 LF311 Voltage Comparators November 1994 LF111 LF211 LF311 Voltage Comparators General Description 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 Further the LF111 can be used in place of the LM111 eliminating errors due to input currents See the ‘‘application hints’’ of the LM311 for application help Features Y Y Y Eliminates input current errors Interchangeable with LM111 No need for input current buffering Schematic Diagram Note Do Not Ground Strobe Pin or Balance Strobe Pin See Note 7 Connection Diagram Metal Can Package TL H 5703 – 2 TL H 5703 – 1 Top View Order Number LF111H LF111H-MIL or LF311H See NS Package Number H08C C1995 National Semiconductor Corporation TL H 5703 RRD-B30M115 Printed in U S A Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications (Note 8) Total Supply Voltage (V84) Output to Negative Supply Voltage (V74) Ground to Negative Supply Voltage (V14) Differential Input Voltage Input Volta...