KA3403

Overview

The KA3403 is a monolithic quad operational amplifier manufactured by Fairchild Semiconductor. It integrates four independent high-gain amplifiers on a single chip. Key electrical specifications include a gain bandwidth product of 9kHz, a -3dB bandwidth of 1MHz, and an input bias current of 30nA. The device operates with a supply voltage range up to 15V minimum and features an input offset voltage of 1.5mV. Supply current is specified at 2.3mA, with an output current capability of 20mA.

Feature Summary

• Monolithic integration of four independent operational amplifiers
• High open-loop gain characteristics
• Low input bias current for precision applications

Applications

• Photodiode signal conditioning circuits
• General-purpose analog signal processing
• Multi-channel sensor interface systems

Procurement Notes

Verify the specific package type (DIP or SOP) and temperature grade against project requirements. Confirm manufacturer documentation aligns with Fairchild Semiconductor specifications. Ensure pinout compatibility if replacing legacy components. Check for RoHS compliance status in official datasheets before finalizing procurement decisions.

Selection Notes

Select this component when multiple low-cost, general-purpose amplifiers are required in a compact form factor. Consider the 9kHz gain-bandwidth product for low-frequency applications only. Evaluate the 1.5mV input offset voltage for accuracy needs. Compare supply current consumption against power-constrained alternatives.

Part Context

This part belongs to the KA3303 series of quad operational amplifiers. It serves as a cost-effective solution for multi-channel analog tasks. The device is commonly used in industrial control and consumer electronics where space efficiency and moderate performance are prioritized over high-speed operation.

Replacement Considerations

The MC3403 is a documented substitute within the same family. Verify pinout compatibility and electrical parameter alignment before substitution. Ensure thermal and mechanical constraints match the original design requirements.