LM258AST

Overview

The LM258AST is a dual low-power operational amplifier manufactured by STMicroelectronics, housed in an 8-MiniSO surface-mount package. It features a gain-bandwidth product of 1.1 MHz and a slew rate of 600 mV/µs. The device operates on a single supply voltage ranging from 3 V to 30 V or split supplies up to ±15 V. Key electrical specifications include a maximum input offset voltage of 1 mV, input bias current of 20 nA, and output current capability of 40 mA per channel. It supports an operating temperature range from -40°C to +105°C and holds AEC-Q100 automotive qualification.

Feature Summary

• Dual-channel architecture with internal frequency compensation for stability
• Low power consumption independent of supply voltage magnitude
• Wide single-supply operation capability from 3 V to 30 V
• Automotive-grade reliability certified under AEC-Q100 standards

Applications

• Sensor signal conditioning and amplification
• DC gain blocks in data acquisition systems
• Active filtering circuits
• Transducer amplifiers

Procurement Notes

Verify the specific suffix 'AST' corresponds to the MiniSO-8 package and AEC-Q100 automotive grade when sourcing. Confirm RoHS compliance status and check for potential pinout variations if substituting from other manufacturers. Ensure the supplier provides valid traceability documentation for automotive applications requiring strict quality control.

Selection Notes

Select this component for designs requiring low quiescent current and wide single-supply voltage tolerance. The 1 mV max input offset voltage makes it suitable for precision sensor interfaces where drift must be minimized. Consider the 8-MiniSO footprint constraints during PCB layout planning to ensure adequate thermal dissipation within the specified temperature range.

Part Context

This part belongs to the LM258A series, representing an upgraded version of the standard LM258 with improved input offset voltage specifications. It is designed as a general-purpose dual operational amplifier suitable for cost-sensitive consumer and industrial electronics. The device integrates two independent high-gain amplifiers on a single die, optimizing board space compared to discrete solutions.

Replacement Considerations

LM258D (SOIC-8 package)

FAQ

What is the maximum supply voltage for the LM258AST?

The maximum supply voltage is 30 V for single-supply operation or ±15 V for split-supply configurations.

Is the LM258AST qualified for automotive applications?

Yes, the LM258AST is AEC-Q100 qualified, making it suitable for automotive electronic systems.