STMicroelectronics LM258DT Dual Operational Amplifier | 2-Circuit General Purpose Amplifier

STMicroelectronics LM258DT: High-Performance Dual Operational Amplifier

The STMicroelectronics LM258DT is a versatile dual operational amplifier designed for a wide range of analog applications. As a member of the General Purpose amplifier family, this IC delivers reliable performance while maintaining low power consumption and exceptional stability. Housed in a compact 8-SOIC package, the LM258DT combines space-saving design with robust electrical characteristics, making it an ideal choice for modern electronic systems requiring precision and efficiency.

Key Features and Specifications

Engineered for demanding environments, the LM258DT features two independent operational amplifier circuits operating from a single 3V to 30V power supply. This wide voltage range enables deployment in both battery-powered portable devices and industrial equipment requiring higher voltage operation. The amplifier's 1.1 MHz gain bandwidth product ensures accurate signal processing for audio, sensor conditioning, and control loop applications.

Advanced Design for Reliable Performance

The LM258DT incorporates STMicroelectronics' advanced semiconductor technology to deliver exceptional temperature stability and low offset voltage (5 mV maximum). Its rail-to-rail output stage provides maximum signal swing capability, while the 40 mA output current ensures direct drive capability for various loads. The amplifier's internal compensation network guarantees stability without external components, simplifying PCB design and reducing bill-of-materials costs.

Manufactured in a thermally efficient 8-SOIC package (3.90mm width), this device meets industry-standard footprint requirements while enabling automated surface-mount assembly. The RoHS-compliant construction ensures environmental compliance for global market applications.

Applications Across Industries

With its combination of performance and flexibility, the LM258DT serves diverse applications including:

• Industrial process control systems
• Consumer electronics signal conditioning
• Automotive sensor interfaces
• Medical instrumentation amplifiers
• Power supply feedback loops

The amplifier's wide supply voltage range supports both single-supply and split-supply configurations, while its high output drive capability reduces the need for additional buffer stages in many designs.

Design Advantages

Engineers benefit from the LM258DT's optimized parameter balance between power consumption and performance. The 700µA supply current per channel enables energy-efficient designs without compromising bandwidth, making it suitable for power-sensitive applications. The device's guaranteed operation across the -40°C to 105°C temperature range ensures reliability in harsh environments, from factory floors to automotive engine compartments.

Compared to discrete transistor solutions, this integrated amplifier offers superior channel matching and temperature tracking between the two operational amplifiers. The monolithic construction eliminates component variation issues while maintaining consistent performance across the device's lifecycle.

Conclusion

The STMicroelectronics LM258DT represents a proven solution for designers seeking a reliable, cost-effective dual operational amplifier. Its combination of wide supply voltage range, temperature stability, and robust output drive capability makes it a versatile building block for analog circuits. Whether implementing active filters, voltage followers, or precision instrumentation amplifiers, this device provides the performance characteristics needed for demanding applications across multiple industries.

Tags: General Purpose Amplifier, Surface Mount IC, Industrial Electronics