KA334

Overview

The KA334 is a high-power dual operational amplifier designed for low impedance loads, delivering up to 0.7A output current. It operates at supply voltages as low as 4V with ground-compatible inputs and large common-mode ranges. Key electrical characteristics include a typical gain-bandwidth product of 350 kHz, input offset voltage of 15 mV, and thermal shutdown protection at 160 °C. The device is available in 8-DIP and 16-SOP packages.

Feature Summary

• High power capability with up to 0.7A continuous output current
• Integrated thermal shutdown protection at 160 °C
• Ground-compatible inputs allowing single-supply operation
• Low saturation voltage under heavy load conditions

Applications

• Servo amplifiers
• Power supplies
• Compact disc players
• Video cassette recorders (VCR)
• Monitor circuits

Procurement Notes

Verify the specific package variant required for your design, as the KA334 is offered in both 8-DIP and 16-SOP configurations. Confirm that the operating temperature range of -25°C to +85°C aligns with your environmental specifications. Ensure proper heat dissipation measures are implemented given the device's power handling capabilities and thermal resistance values.

Selection Notes

Select this component when driving low-impedance loads requiring significant current without external buffering. The ground-compatible input stage simplifies single-supply circuit designs. Consider the 16-SOP package if higher pin density or different thermal characteristics are needed compared to the standard 8-DIP option.

Part Context

Originally manufactured by Fairchild Semiconductor Corporation, the KA334 is now part of onsemi's portfolio following corporate acquisitions. It belongs to the family of high-power operational amplifiers intended for audio and industrial applications where robust output stages are necessary.

Replacement Considerations

Check datasheets for alternative dual power op-amps offering similar current ratings and package compatibility. Verify pinout alignment before substitution to ensure direct replacement feasibility without PCB redesign.

FAQ

What is the maximum DC output current?

The KA334 provides a guaranteed DC output current of up to 0.7A.

How does the device handle overheating?

It includes built-in thermal shutdown protection that activates at 160 °C to prevent damage.

Can it operate from a single supply?

Yes, ground-compatible inputs allow it to function effectively in single-supply configurations starting at 4V.