KA358

Overview

The KA358 is a dual operational amplifier manufactured by Fairchild Semiconductor. It features two independent high-gain amplifiers within a single package, designed for general-purpose applications. The device operates on a supply voltage range of 3V to 32V and draws a typical supply current of 2mA per amplifier. Key electrical specifications include an open-loop gain of 84dB and a unity-gain bandwidth suitable for standard signal processing tasks. It is available in an 8-pin DIP through-hole package.

Feature Summary

• Dual operational amplifier configuration with two independent high-gain channels
• Wide single-supply or split-supply voltage operation capability
• Standard through-hole packaging for easy integration into legacy designs

Applications

• General-purpose analog signal conditioning
• Voltage comparison circuits
• Active filter implementations

Procurement Notes

Verify the manufacturer origin carefully, as Fairchild Semiconductor has undergone corporate restructuring and integration with ON Semiconductor. Ensure the specific orderable part number matches the required temperature grade and package variant. Confirm RoHS compliance status if environmental regulations apply to your assembly process. Cross-reference datasheet revisions to ensure pinout and electrical characteristics remain consistent with your design requirements.

Selection Notes

Select this component when a cost-effective dual op-amp solution is required for low-frequency applications. Consider the 2mA quiescent current consumption relative to power-sensitive designs. Verify that the 84dB open-loop gain meets the precision requirements of your specific circuit topology. Ensure the operating voltage range aligns with your system's power supply rails.

Part Context

The KA358 belongs to the family of dual operational amplifiers widely used in industrial and consumer electronics. Originally produced by Fairchild Semiconductor, these devices are standard components for basic analog functions. The integration of two amplifiers in one package reduces board space compared to using single op-amps. This part represents a legacy component often found in existing schematics requiring reliable, general-purpose amplification.

Replacement Considerations

Check for direct equivalents such as the LM358 series, which shares similar pinouts and electrical characteristics. Verify compatibility regarding supply voltage ranges and output swing capabilities before substitution.