15MHz, BiMOS Operational Amplifier with MOSFET Input/CMOS Output

Typical Diagram

enlarge +typical diagram

Key Features

    • MOSFET Input Stage Provides:
      • Very High ZI = 1.5 TΩ (1.5 x 1012Ω) (Typ)
      • Very Low II 5pA (Typ) at 15V Operation = 2pA (Typ) at 5V Operation
    • Ideal for Single-Supply Applications
    • Common-Mode Input-Voltage Range Includes Negative Supply Rail; Input Terminals can be Swung 0.5V Below Negative Supply Rail
    • CMOS Output Stage Permits Signal Swing to Either (or both) Supply Rails
    • Pb-Free Plus Anneal Available (RoHS Compliant)


CA3130A and CA3130 are op amps that combine the advantage of both CMOS and bipolar transistors.

Gate-protected P-Channel MOSFET (PMOS) transistors are used in the input circuit to provide very-high-input impedance, very-low-input current, and exceptional speed performance. The use of PMOS transistors in the input stage results in common-mode input-voltage capability down to 0.5V below the negative-supply terminal, an important attribute in single-supply applications.

A CMOS transistor-pair, capable of swinging the output voltage to within 10mV of either supply-voltage terminal (at very high values of load impedance), is employed as the output circuit.

The CA3130 Series circuits operate at supply voltages ranging from 5V to 16V, (±2.5V to ±8V). They can be phase compensated with a single external capacitor, and have terminals for adjustment of offset voltage for applications requiring offset-null capability. Terminal provisions are also made to permit strobing of the output stage.

The CA3130A offers superior input characteristics over those of the CA3130.


    • Ground-Referenced Single Supply Amplifiers
    • Fast Sample-Hold Amplifiers
    • Long-Duration Timers/Monostables
    • High-Input-Impedance Comparators (Ideal Interface with Digital CMOS)
    • High-Input-Impedance Wideband Amplifiers
    • Voltage Followers (e.g. Follower for Single-Supply D/A Converter)
    • Voltage Regulators (Permits Control of Output Voltage Down to 0V)
    • Peak Detectors
    • Single-Supply Full-Wave Precision Rectifiers
    • Photo-Diode Sensor Amplifiers


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