CA3130EZ Operational Amplifier

This operational amplifier combines 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. It operates at supply voltages ranging from to ±8V). It 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.

Technical Specification

• 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)