KA358A

Overview

The KA358A is a dual operational amplifier manufactured by Fairchild Semiconductor, functionally equivalent to the LM258 series. It features two independent, high-gain, internally frequency-compensated amplifiers designed for single-supply operation over a wide voltage range. The device supports split power supplies and maintains low power supply current drain independent of voltage magnitude. Key electrical parameters include a power supply range of 3V to 32V (or ±1.5V to ±16V), an input common mode voltage range that includes ground, and a large output voltage swing from 0V DC to Vcc - 1.5V DC.

Feature Summary

• Internally frequency compensated for unity gain stability
• Wide power supply range suitable for battery operation
• Input common mode voltage range includes ground potential
• Large output voltage swing capability

Applications

• Transducer amplifier circuits
• DC gain blocks
• Single power supply OP-AMP implementations

Procurement Notes

Verify the manufacturer marking on the component body to confirm Fairchild Semiconductor origin, as this part number is widely produced by multiple vendors with identical pinouts and specifications. Ensure the package type matches the design requirements, typically an 8-pin configuration. Cross-reference the specific suffix if present against official datasheets to confirm any minor variations in temperature rating or packaging style.

Selection Notes

Select the KA358A when a low-power, dual operational amplifier is required for single-supply applications. Its ability to operate with input signals at ground potential makes it suitable for sensor interfacing. Consider its internal frequency compensation for stability in unity gain configurations. Evaluate the wide supply voltage range to ensure compatibility with the system's power architecture.

Part Context

The KA358A belongs to the family of low-power dual operational amplifiers, sharing functional characteristics with the LM358, LM258, and LM2904. These devices are industry-standard components known for their versatility in analog signal processing. The KA358A specifically denotes the Fairchild Semiconductor variant, maintaining compatibility with the broader ecosystem of dual op-amps used in industrial and consumer electronics.

Replacement Considerations

The KA358A can be replaced by LM358, LM258, LM2904, or KA358A equivalents from other manufacturers such as ON Semiconductor or Texas Instruments, provided the pinout and electrical specifications align.