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

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.

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)

Applications
• 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