CA3140E

Overview

The CA3140E is a BiMOS operational amplifier featuring a PMOS input stage and bipolar output. It operates on supply voltages from 4V to 36V (±2V to ±18V). Key electrical parameters include a gain-bandwidth product of 4.5MHz, a slew rate of 9V/µs, an input bias current of 10pA, and an input resistance of 1.5TΩ. The device provides a common mode rejection ratio of 70dB and power supply rejection ratio of 80dB. It includes internal phase compensation for unity gain stability and offset nulling terminals.

Feature Summary

• Integrates high voltage PMOS transistors with high voltage bipolar transistors on a single monolithic chip.
• Features gate-protected MOSFET input circuitry providing very high input impedance and extremely low input current.
• Includes built-in protection against damage from load terminal short circuits to either supply rail or ground.
• Offers access terminals for supplementary external capacitors to adjust frequency roll-off.

Applications

• Ground-referenced single supply amplifiers in automobile and portable instrumentation
• Sample and hold amplifiers
• Photocurrent instrumentation
• Active filters
• Interface in 5V TTL systems

Procurement Notes

Verify the specific package type required, as the CA3140 family includes both PDIP and SOIC variants. Confirm that the selected component meets RoHS compliance standards if lead-free processing is necessary. Ensure the ordering suffix matches the desired thermal and mechanical specifications provided by the manufacturer.

Selection Notes

Select this component when high input impedance and low input current are critical requirements. It serves as a direct replacement for industry standard 741 operational amplifiers in most applications. Consider its capability to operate down to 4V total supply voltage for low-power single-supply designs.

Part Context

The CA3140 series combines the advantages of high voltage PMOS and bipolar transistors. It is internally phase compensated for stable operation in unity gain follower configurations. The device allows for additional frequency roll-off via external components and includes terminals for input offset voltage nulling.

Replacement Considerations

CA3140AE

FAQ

Can the CA3140E operate with a single power supply?

Yes, the CA3140E can operate at supply voltages from 4V to 36V using either a single or dual power supply configuration.

How is the output swing limited in 5V TTL systems?

A zener diode connected between Terminal 8 and Terminal 4 limits the maximum output signal swing to TTL levels, independent of the operating supply voltage.