KA324-T

Overview

The KA324-T is a quad operational amplifier manufactured by Fairchild Semiconductor. It features four independent high-frequency amplifiers with internal frequency compensation, designed for single-supply operation while remaining compatible with dual supplies. Key electrical parameters include a supply voltage range of 3 V to 32 V, an input bias current of 250 nA, and a typical slew rate of 10 V/µs. The device offers a voltage gain of 100 dB and a power supply rejection ratio (PSRR) of 65 dB. It operates within a temperature range of 0°C to 70°C and is available in a 14-pin DIP package.

Feature Summary

• Quad configuration providing four independent high-frequency amplifiers within a single integrated circuit
• Internal frequency compensation eliminates the need for external components during stability management
• Single-supply capability allows direct interfacing with standard logic families and sensors

Applications

• Transducer amplification for sensor signal conditioning
• DC gain blocks in measurement circuits
• Active filter implementations

Procurement Notes

Verify that the specific KA324-T suffix corresponds to the intended tape-and-reel packaging variant rather than tube packaging when sourcing from distributors. Confirm the manufacturer designation matches Fairchild Semiconductor or its successor entities to ensure component authenticity and traceability. Cross-reference the date code against current production status to avoid obsolete stock issues.

Selection Notes

Select this component when a quad op-amp solution is required for cost-sensitive applications needing single-supply compatibility. The internal frequency compensation simplifies layout compared to uncompensated devices. Ensure the application does not require rail-to-rail output swing, as this device utilizes bipolar technology with limited headroom near the supply rails.

Part Context

This part belongs to the widely adopted LM324 family of quad operational amplifiers. While originally associated with National Semiconductor, Fairchild Semiconductor produced variants under similar naming conventions. The KA324 series serves as a general-purpose analog processing element, distinct from precision or high-speed specialized op-amps due to its balanced performance characteristics.

Replacement Considerations

Direct pin-compatible substitutes include the LM324, TL084, and NE324. Verify that replacement parts maintain the same supply voltage limits and thermal specifications. Note that some modern equivalents may offer improved offset voltage or noise performance but might differ in input capacitance.