LM2903QD

Overview

The LM2903QD is a dual differential voltage comparator manufactured by Texas Instruments. It operates from a single power supply ranging from 2V to 30V or dual supplies of ±1V to ±15V. The device features an input common-mode voltage range that includes the negative rail, allowing for ground-referenced signal processing. It utilizes open-collector outputs compatible with TTL, MOS, and CMOS logic families. The component supports an operating temperature range from -40°C to +125°C and is housed in an 8-pin SOIC package.

Feature Summary

• Dual independent voltage comparators designed for wide-range single-supply operation
• Input common-mode voltage range extends to include the negative supply rail
• Open-collector output configuration ensures compatibility with various digital logic families

Applications

• Vacuum robot systems
• Single phase UPS units
• Server PSU monitoring
• Cordless power tools
• Wireless infrastructure equipment

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature grade. Ensure the selected variant matches the required supply voltage limits and thermal performance specifications for the target application environment before finalizing procurement.

Selection Notes

Select this component when designing circuits requiring dual comparators with ground-referenced inputs. The open-collector output allows flexible interfacing with different logic levels. Consider the maximum supply voltage rating and thermal characteristics to ensure reliable operation within the specified industrial temperature range.

Part Context

This device belongs to the industry-standard LMx93/LM2903 family of dual comparators. It serves as a foundational analog component for signal conditioning and threshold detection tasks. The family is widely recognized for its versatility in single-supply applications across consumer, industrial, and automotive electronics sectors.

Replacement Considerations

The LM2903B is documented as a drop-in replacement for the LM2903 family, offering improved electrical specifications such as lower offset voltage and faster response times while maintaining pin compatibility.