The CA3290A and CA3290 types consist of a dual voltage comparator on a single monolithic chip. The common mode input voltage range includes ground even when operated from a single supply. The low supply current drain makes these comparators suitable for battery operation; their extremely low input currents allow their use in applications that employ sensors with extremely high source impedances. Package options are shown in the table below.

Features

• MOSFET Input Stage

   - Very High Input Impedance (ZIN) . . . . . . . . 1.7TΩ (Typ)

   - Very Low Input Current at V+ = 5V. . . . . . . 3.5pA (Typ)

   - Wide Common Mode Input Voltage Range (VICR) Can Be Swung 1.5V (Typ) Below Negative Supply Voltage Rail

   - Virtually Eliminates Errors Due to Flow of Input Currents

• Output Voltage Compatible with TTL, DTL, ECL, MOS, and CMOS Logic Systems in Most Applications

Applications

• High Source Impedance Voltage Comparators

• Long Time Delay Circuits

• Square Wave Generators

• A/D Converters

• Window Comparators