KA2904

Overview

The KA2904 is a dual operational amplifier manufactured by onsemi. It features two independent, high-gain amplifiers with internal frequency compensation. The device operates from a single power supply over a wide voltage range. Key electrical characteristics include a large DC voltage gain of 100 dB and a unity-gain bandwidth of 1.1 MHz. It exhibits low input bias current of 20 nA and low input offset current of 2 nA. The input common-mode voltage range includes the negative rail, allowing ground-referenced operation.

Feature Summary

• Internal frequency compensation for stability
• Single-supply operation capability
• Input common-mode range includes negative rail

Applications

• Transducer amplifiers
• DC gain blocks
• Electronic interfaces in logic systems

Procurement Notes

Verify the exact manufacturer origin as the KA2904 designation is historically associated with Fairchild Semiconductor. Confirm that the specific unit provided is indeed produced or distributed by onsemi, as part numbers may be shared across different manufacturers or represent legacy products acquired through corporate mergers. Check datasheets for pinout compatibility if substituting.

Selection Notes

Select this component for applications requiring low-power dual op-amps compatible with standard 5V logic supplies. Ensure the design utilizes single-supply configurations to leverage the ground-inclusive input common-mode range. Verify that the 1.1 MHz bandwidth meets the signal processing requirements for the intended transducer or gain block application.

Part Context

The KA2904 belongs to the family of low-power dual operational amplifiers designed for automotive and industrial control systems. It serves as a cost-effective solution for general-purpose analog signal conditioning where moderate bandwidth and low quiescent current are prioritized. The device simplifies circuit design by eliminating the need for external frequency compensation components.