LM248D

Overview

The LM248D is a quad operational amplifier manufactured by STMicroelectronics, housed in a 14-pin SOIC package. It features four independent high-gain amplifiers with internal compensation. Key electrical parameters include a maximum static current of 4.5mA, an input offset voltage (Vos) of 1mV, and a slew rate of 500mV/μs. The gain bandwidth product (GBP) is 1MHz, with an input bias current of 30nA. The device supports a maximum output current of 25mA and offers a common-mode rejection ratio (CMRR) of 90dB. Operating temperatures range from -25°C to +85°C.

Feature Summary

• Contains four independent, internally compensated operational amplifiers designed for functional compatibility with standard UA741 specifications.
• Features Class AB output stages to eliminate crossover distortion while maintaining low power consumption across all channels.
• Provides high isolation between amplifiers through independent biasing and layout techniques that minimize thermal coupling.

Applications

• Applications requiring multiple UA741-type amplifiers within a single integrated circuit
• Circuits demanding high packaging density and precise amplifier matching
• Low-power signal conditioning systems

Procurement Notes

Verify the manufacturer designation on the component marking, as the 'LM' prefix may indicate legacy Texas Instruments design or STMicroelectronics production under license. Confirm the 'D' suffix corresponds to the SOIC-14 package variant. Ensure the operating temperature range meets system requirements, as industrial grades differ from commercial variants. Cross-reference the specific datasheet version to validate pinout and electrical limits against the intended application constraints.

Selection Notes

Select this component when a quad configuration is necessary to replace discrete UA741 units, reducing board space and component count. The low supply current per amplifier makes it suitable for battery-operated or energy-constrained designs. Verify that the 1MHz gain-bandwidth product and 500mV/μs slew rate satisfy the signal frequency and speed requirements of the target circuit before finalizing the design.

Part Context

This part belongs to the LM24x series of quad operational amplifiers, which are engineered to provide characteristics identical to the classic UA741 but with improved power efficiency. The series allows designers to utilize four amplifiers with a total supply current comparable to a single UA741 unit. This family is widely used in general-purpose analog applications where moderate performance and low cost are prioritized over high-speed precision.

Replacement Considerations

The LM248D is functionally compatible with the LM348D and LM148D. These parts share the same pinout and electrical characteristics, differing primarily in temperature rating ranges. Designers can substitute these parts directly without schematic modifications, provided the environmental conditions align with the specific grade's specifications.