LM2902

Overview

The LM2902 is a low-power, bipolar quad operational amplifier consisting of four independent, high-gain circuits with internal frequency compensation. Designed for automotive and industrial control systems, it operates from single or split power supplies over a wide voltage range. Key electrical parameters include a gain-bandwidth product of 1.3 MHz, large voltage gain of 100 dB, and supply current per amplifier of 375 µA. It features low input bias current (20 nA) and offset current (2 nA). The device supports single supplies from 3 V to 30 V and dual supplies from ±1.5 V to ±15 V.

Feature Summary

• Four independent high-gain operational amplifiers with internal frequency compensation
• Wide power supply range supporting both single and split configurations
• Low power supply current drain essentially independent of supply voltage magnitude
• Input common-mode voltage range includes the negative rail

Applications

• Automotive control systems
• Industrial control systems
• Transducer amplifiers
• DC gain blocks

Procurement Notes

Verify the specific manufacturer source, as STMicroelectronics, NXP, and others produce this part number. Confirm package type (e.g., TSSOP, SOIC) and temperature grade against project requirements. Ensure AEC-Q100 qualification is required if used in automotive applications. Check RoHS compliance status for environmental regulations.

Selection Notes

Select based on required channel count and supply voltage constraints. The LM2902 offers a balance of low power consumption and sufficient bandwidth for general-purpose applications. Consider thermal performance and package size relative to PCB layout. Verify input offset voltage and bias current specifications against signal integrity needs.

Part Context

The LM2902 belongs to the broader family of low-power quad operational amplifiers, often compatible with the LM124/LM2902 series standards. It serves as a cost-effective solution for multi-channel signal conditioning where power efficiency is critical. The component is widely available from multiple semiconductor manufacturers including STMicroelectronics and NXP Semiconductors.

Replacement Considerations

LM2904 is a dual-channel variant with similar electrical characteristics. LM124 is the commercial temperature grade equivalent. Verify pinout compatibility and thermal resistance when substituting across different manufacturers.