CA3140EZ Operational Amplifier IC | High Input Impedance – MOSFET Input | ELCMart
The CA3140EZ is a high-performance operational amplifier that combines the best of both worlds — the input characteristics of MOSFETs and the output drive of bipolar transistors. That means ultra-high input impedance, extremely low input current, and excellent DC precision, making it a top choice for sensitive analog signal applications.
Whether you’re repairing audio equipment, building sensors, or designing measurement circuits, the CA3140EZ provides clean amplification, low noise, and reliable stability. It’s a popular component for hobbyists, engineers, and repair technicians — a perfect fit for your electronics toolbox.
⭐ Key Features
- High Input Impedance (MOSFET-based inputs for precision signals)
- Low Input Current — ideal for sensor & instrumentation circuits
- Wide Supply Voltage Range — compatible with different power setups
- Fast Slew Rate — better response for audio & analog processing
- Output Swings Close to Ground for improved usability
- Low Noise & High Stability in various temperature conditions
- IC Package: 8-Pin DIP (easy to solder on PCB)
- Perfect for Repair and DIY Electronics Projects
📦 Full Specifications
| Specification | Details |
|---|---|
| Model | CA3140EZ |
| Type | Operational Amplifier (Op-Amp IC) |
| Input Technology | MOSFET Input Stage |
| Output Stage | Bipolar Transistor Output |
| Pin Count | 8 Pins (DIP-8 Package) |
| Supply Voltage | ±2V to ±15V (Single or Dual Supply) |
| Input Impedance | 1.5 TΩ (Typical – Very High) |
| Slew Rate | 9 V/µs (Fast Response) |
| Input Current | Very Low (Ideal for sensitive circuits) |
| Offset Voltage | Low, for precision amplification |
| Temperature Range | Industrial grade stability |
| Applications | Amplifiers, Sensors, Audio Filters, Test Equipment, Signal Conditioning |
| Brand | Generic / Multiple OEM Compatible |
| Sold By | ELCMart |
📌 Best Applications
- Audio pre-amps & tone control circuits
- pH and gas sensor amplifiers
- Comparator and waveform generator circuits
- Robotics & microcontroller-based analog interfaces
- Medical and industrial signal measuring equipment
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