CA3290A comparators equivalent, bimos dual voltage comparators.
* MOSFET Input Stage - Very High Input Impedance (ZIN) . . . . . . . . 1.7TΩ (Typ) - Very Low Input Current at V+ = 5V . . . . . . . 3.5pA (Typ) - Wide Common Mode In.
that employ sensors with extremely high source impedances. Package options are shown in the table below.
Features
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The Basic Comparator
Figure 4 shows the basic circuit diagram for one of the two comparators in the CA3290. It is generically similar to the industry type “139” comparators, with PMOS transistors replacing PNP transistors as input stage elements. Tra.
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