Intersil

LM324N

LM324N Description

The LM324N by Intersil is a general-purpose quad operational amplifier (op-amp) from the LinCMOS™ series, housed in a 14-pin DIP package. Designed for through-hole mounting, this IC operates over a wide supply voltage range of 3V to 32V, making it versatile for both low and high-voltage applications. With a low input bias current of 45nA and a moderate input offset voltage of 2mV, it ensures stable performance in precision circuits. The device consumes 1.5mA supply current per amplifier and delivers 40mA output current per channel, suitable for driving moderate loads. Although marked as obsolete, it remains a reliable choice for legacy designs.

LM324N Features

• Quad Op-Amp Configuration: Integrates four independent amplifiers in a single package, reducing board space and cost.
• Wide Supply Range (3V–32V): Compatible with single or dual supplies, ideal for battery-powered and industrial systems.
• Low Power Consumption: 1.5mA total supply current enhances energy efficiency.
• High Output Drive (40mA/channel): Capable of driving LEDs, relays, or small motors directly.
• Low Input Bias Current (45nA): Minimizes errors in high-impedance sensor interfaces.
• Robust Temperature Range (0°C to 70°C): Suitable for commercial-grade applications.

LM324N Applications

The LM324N excels in general-purpose analog circuits, including:

• Signal Conditioning: Active filters, integrators, and comparators in sensor interfaces.
• Power Management: Voltage regulators and current-limiting circuits.
• Industrial Control: Process monitoring, motor control, and instrumentation amplifiers.
• Consumer Electronics: Audio preamps, tone controls, and LED drivers.
• Battery-Powered Systems: Portable devices leveraging its low-voltage operation and efficiency.

Conclusion of LM324N

The LM324N is a cost-effective, versatile quad op-amp with a balance of performance and power efficiency. Its wide voltage range, low input bias, and robust output drive make it ideal for mixed-signal designs, industrial systems, and portable electronics. While newer alternatives exist, its proven reliability ensures continued use in legacy and low-complexity applications. Engineers value its simplicity, integration density, and compatibility with harsh environments, cementing its role in analog design history.