KA324A

Overview

The KA324A is a quad operational amplifier manufactured by Fairchild Semiconductor. It features four independent high-frequency amplifiers on a single package, designed for single-supply operation with voltage ranges from 3 V to 32 V. Key electrical parameters include a supply current of approximately 1 mA and an output current capability of 40 mA per channel. The device exhibits a typical input bias current of 40 nA and an input offset voltage of 1.5 mV. It operates within a temperature range of 0°C to 70°C and is available in a 14-pin DIP package.

Feature Summary

• Integrates four independent high-frequency operational amplifiers within a single compact package
• Supports single-supply operation across a wide voltage range without requiring external biasing components
• Features true differential inputs that allow the common mode signal to reach the negative power supply rail

Applications

• Transducer amplifiers for sensor signal conditioning
• DC gain blocks in analog circuits
• Operational amplifiers in audio and voltage regulator designs

Procurement Notes

Verify the specific manufacturer source, as the KA324 designation has been produced by multiple vendors including ON Semiconductor and others. Confirm the exact pinout compatibility and package dimensions against your PCB footprint requirements. Ensure the operating temperature range meets your environmental specifications. Check for lead-free compliance if required by your assembly standards. Validate the datasheet revision to confirm parameter accuracy.

Selection Notes

Select this component when a cost-effective solution for multiple amplifier channels is required. It is suitable for applications where single-supply operation simplifies power distribution. Consider the input bias current and offset voltage specifications for precision requirements. Evaluate the package type availability for your manufacturing process. Compare performance metrics against other quad op-amps if higher bandwidth or lower noise is needed.

Part Context

The KA324 series belongs to the family of low-cost quad operational amplifiers widely used in general-purpose analog electronics. It serves as a functional alternative to standard dual-supply op-amps in single-supply systems. The design eliminates the need for complex biasing networks, making it popular in consumer electronics and industrial control applications. Its industry-standard pinout facilitates easy replacement in existing designs.