CA3130 MOSFET-Input Operational Amplifier with CMOS Output
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Prices updated: 13 Oct 2026
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About this product
The CA3130 is an operational amplifier that combines CMOS and bipolar transistors, with a gate-protected PMOS input stage. It provides very high input impedance and very low input current. Its input range includes the negative supply rail, and its CMOS output can swing to either or both supply rails, which suits single-supply and high-impedance sensor circuits.
Specifications
- Input stage
- PMOS (MOSFET input)
- Input impedance
- 1.5 TΩ typical
- Input current
- 5 pA typical at 15 V
- Common-mode input range
- Includes negative supply rail
- Output stage
- CMOS
- Compliance
- RoHS (Pb-free version available)
Frequently asked questions
Is the CA3130 suitable for single-supply circuits?
Yes. Its datasheet describes it as ideal for single-supply applications, with an input range that reaches the negative supply rail and a CMOS output that swings toward the supply rails.
Why choose the CA3130 for sensor circuits?
Its MOSFET input gives extremely high input impedance and very low input current, which reduces loading and measurement error on high-impedance sources such as pH probes and photodiodes.
