CA3130A and CA3130 are op amps that combine theadvantage of both CMOS and bipolar transistors.Gate-protected P-Channel MOSFET (PMOS) transistors areused in the input circuit to provide very-high-inputimpedance, very-low-input current, and exceptional speedperformance. The use of PMOS transistors in the input stageresults in common-mode input-voltage capability down to0.5V below the negative-supply terminal, an importantattribute in single-supply applications.A CMOS transistor-pair, capable of swinging the outputvoltage to within 10mV of either supply-voltage terminal (atvery high values of load impedance), is employed as theoutput circuit.The CA3130 Series circuits operate at supply voltagesranging from 5V to 16V, (±2.5V to±8V). They can be phasecompensated with a single external capacitor, and haveterminals for adjustment of offset voltage for applicationsrequiring offset-null capability. Terminal provisions are alsomade to permit strobing of the output stage.The CA3130A offers superior input characteristics overthose of the CA3130