LM2903QDRG4Q1

Overview

The LM2903QDRG4Q1 is a dual differential voltage comparator from Texas Instruments, designed for automotive applications. It features an open-drain output capable of rail-to-rail operation and operates on a single supply voltage ranging from 2V to 36V or dual supplies from ±1V to ±18V. The device includes two independent channels within an 8-SOIC package. Key electrical specifications include a maximum input offset voltage of 7mV at 5V and a maximum input bias current of 0.25µA at 5V. It supports a typical output current of 20mA and has a maximum static current consumption of 2.5mA.

Feature Summary

• Automotive-grade qualification compliant with AEC-Q100 standards
• Dual differential configuration with open-drain outputs
• Wide single and dual power supply voltage range
• Rail-to-rail output capability

Applications

• Fire and carbon monoxide alarm detectors
• Automotive sensing circuits
• General-purpose analog comparison tasks in vehicle electronics

Procurement Notes

Verify the specific suffix G4 indicates lead-free status and RoHS compliance when sourcing. Confirm the SOIC-8 package dimensions match your PCB footprint requirements. Ensure the operating temperature range covers -40°C to 125°C for your intended environment. Check for any recent PCN notices regarding assembly or design changes that might affect long-term availability.

Selection Notes

Select this component when automotive reliability is required alongside standard comparator functionality. The open-drain output allows flexible interfacing with various logic levels. Consider the 7mV offset voltage limit for precision applications. Verify that the 20mA output current meets the load requirements of your downstream circuitry without external buffering.

Part Context

This part belongs to the LM2903-Q1 series, which provides robust performance for harsh automotive environments. It serves as a specialized variant of the general-purpose LM2903 family, tailored specifically for automotive electronic control units and safety systems requiring high reliability and wide operating voltage ranges.

Replacement Considerations

LM2903QDRQ1 is a direct functional substitute within the same series. LM2903AVQDRQ1 offers enhanced voltage specifications but may require verification of pin compatibility. Always confirm package type and electrical limits before substitution.