onsemi

KA358A

KA358A Description

The KA358A from onsemi is a general-purpose dual operational amplifier (op-amp) housed in an 8-pin DIP (Dual Inline Package). Designed for versatility, it operates over a wide supply voltage range of 3V to 32V, making it suitable for both low and high-voltage applications. With a low input bias current of 45 nA and a moderate input offset voltage of 2 mV, this IC ensures stable and precise signal amplification. The current consumption of 800µA per amplifier enhances power efficiency, while the output current capability of 30 mA per channel allows it to drive moderate loads effectively.

KA358A Features

• Wide Supply Voltage Range (3V–32V): Supports diverse power configurations, from battery-operated devices to industrial systems.
• Low Power Consumption (800µA): Ideal for energy-sensitive applications.
• High Output Drive (30 mA/channel): Capable of driving small relays, LEDs, or other low-power peripherals.
• Low Input Bias Current (45 nA): Minimizes errors in high-impedance circuits.
• RoHS3 & REACH Compliant: Environmentally friendly and meets global regulatory standards.
• Through-Hole Mounting (DIP-8): Simplifies prototyping and legacy system integration.

KA358A Applications

The KA358A excels in general-purpose amplification, signal conditioning, and comparator circuits. Key applications include:

• Sensor Interfaces: Amplifying weak signals from thermocouples, strain gauges, or photodiodes.
• Power Supplies: Error amplification in voltage regulators or feedback loops.
• Audio Preamplifiers: Low-noise signal processing in consumer electronics.
• Industrial Control Systems: Signal buffering, filtering, or level shifting in automation equipment.
• Battery-Powered Devices: Portable instruments due to its low quiescent current.

Conclusion of KA358A

The KA358A is a cost-effective, reliable dual op-amp offering a balanced combination of wide voltage range, low power consumption, and robust output drive. While marked as obsolete, its through-hole package and proven performance make it a practical choice for legacy designs, educational projects, or repairs. For modern designs, consider newer alternatives, but the KA358A remains a solid performer in low-frequency analog circuits where simplicity and durability are prioritized.