CA3140 Operational Amplifier IC 4.5MHz BiMOS MOSFET Input Op Amp
CA3140 Operational Amplifier is a high-performance BiMOS operational amplifier IC featuring a MOSFET input stage and bipolar transistor output stage. It is designed for applications that require very high input impedance, very low input current, wide common-mode input range and good operating speed.
The CA3140 can operate from a 4V to 36V supply, making it suitable for both single-supply and dual-supply analog circuits. Its MOSFET input provides a typical input impedance in the teraohm range and very low input bias current, which makes the IC useful for high-impedance sensor interfaces and precision analog signal processing.
With approximately 4.5MHz bandwidth, CA3140 can be used in a wide range of electronics projects including voltage amplifiers, active filters, comparators, peak detectors, sample-and-hold circuits, function generators, tone-control circuits and sensor signal conditioning.
For Bangladeshi electronics students, engineers, hobbyists and Arduino makers, CA3140 is a useful choice when a traditional 741-style single op-amp with a MOSFET input stage is required.
Specifications:
| Specification | Details |
|---|---|
| IC Name | CA3140 |
| Type | Operational Amplifier |
| Amplifier Channels | 1 |
| Technology | BiMOS |
| Input Stage | MOSFET / PMOS |
| Output Stage | Bipolar |
| Bandwidth | 4.5 MHz |
| Gain-Bandwidth Product | Approx. 3.7 MHz typical |
| Supply Voltage | 4V to 36V |
| Dual Supply | ±2V to ±18V |
| Input Impedance | Approx. 1.5 TΩ typical |
| Input Bias Current | Approx. 10 pA typical at ±15V |
| Slew Rate | Approx. 7 V/µs typical |
| CMRR | Approx. 90 dB |
| PSRR | Approx. 80 dB |
| Large Signal Voltage Gain | Approx. 100 dB typical |
| Input Common-Mode Range | Can extend about 0.5V below negative supply rail |
| Output | Bipolar transistor output |
| Package | 8-Pin DIP / SOIC variants |
| Number of Pins | 8 |
| Type of Amplifier | Voltage Feedback Op-Amp |
| Application | Analog signal amplification and processing |
Note: Electrical characteristics can vary according to the CA3140/CA3140A version, package and operating conditions. Always check the specific datasheet for design-critical applications.
Pin Configuration:
| Pin | Name | Function |
|---|---|---|
| 1 | Offset Null | Offset voltage adjustment |
| 2 | Inverting Input | Negative input |
| 3 | Non-Inverting Input | Positive input |
| 4 | V− | Negative supply |
| 5 | Offset Null | Offset voltage adjustment |
| 6 | Output | Amplified output |
| 7 | V+ | Positive supply |
| 8 | Strobe | Strobe / output control |
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