CA3130EZ

The CA3130EZ is a BiMOS operational amplifier (MOSFET input, bipolar output) in an 8-pin package. It combines very high input impedance and ultra-low input bias current from the MOS input with the drive capability of a bipolar output stage. Key points:
- Wide supply range: 5–16 V single supply (or ± supplies).
- Input common-mode includes the negative rail; output can swing close to the rails under light load.
- Suitable for high-impedance bufferings, transimpedance amps, active filters, and general single-supply amplification.
EZ denotes the surface‑mount variant of the CA3130 family. Uses include sensor front-ends, precision buffering, and other applications where you need to minimize loading of a high-impedance source while still achieving reasonable gain and bandwidth.

Direct equivalents: CA3140 / CA3140A (same MOSFET‑input family) and vendor clones sold as MC3130/MC3140 or NTE cross‑refs. Modern functional (not necessarily pin‑compatible) replacements: TI OPA350, Microchip/MCP600x series, and other rail‑to‑rail CMOS input op‑amps. Always verify pinout, supply range, input bias, offset and bandwidth before substituting.

Key features of CA3130EZ:
- BiMOS operational amplifier: MOSFET input stage with a bipolar output drive for high input impedance and good output current.
- Very high input impedance and ultra-low input bias current (pA range).
- Wide supply range: 5 V to 16 V single-supply (or ±2.5 V to ±8 V).
- Input common-mode range extends to the negative rail (suitable for single-supply circuits).
- External compensation: requires a capacitor between pins 1 and 8 to set gain/bandwidth; can be unity-gain stable with proper compensation.
- Output capable of driving moderate loads and can swing close to the rails under light load.
- Moderate speed suitable for general analog tasks (high impedance sensors, integrators, etc.).
- Package options: 8-pin DIP or SO-8 (EZ indicates surface-mount variant); operating temperature typically -40°C to +85°C.

- Pin count: 8 pins (DIP-8/SO-8).
- Function: CA3130EZ is a BiMOS operational amplifier with MOSFET input and CMOS output stage. It provides very high input impedance, supports single-supply operation (typically 5–16 V), and is used as a general-purpose op-amp for amplification with low input bias current.

The CA3130EZ is made by Intersil (the CA3xxx BiMOS op amp family originally from RCA/Harris). Intersil is a semiconductor company that designs and sells analog, mixed‑signal and power-management integrated circuits. Intersil was acquired by Renesas Electronics in 2017, so the CA3130EZ product line is now part of Renesas, a global semiconductor manufacturer.

The CA3130EZ is typically supplied in an 8‑lead plastic DIP (PDIP‑8) package. The CA3130 family is also commonly offered in an 8‑lead SOIC (surface‑mount) variant.