LM2903BHQDGKRQ1

Overview

The LM2903BHQDGKRQ1 is an automotive-grade dual differential comparator from Texas Instruments, part of the LM2903B-Q1 family. It operates on a single or dual supply ranging from 2V to 36V within an ambient temperature range of -40°C to +125°C. The device features low quiescent current (600µA typical), low input bias current (3.5nA typical), and low input offset voltage (±0.37mV typical). It utilizes an open-drain output configuration and provides improved ESD protection with 2kV HBM capability.

Feature Summary

• Qualified for automotive applications meeting AEC-Q100 Grade 1 standards
• Features enhanced electrostatic discharge protection with 2kV Human Body Model rating
• Offers low power consumption with supply current independent of voltage
• Supports wide common-mode input voltage range including ground

Applications

• Hybrid electric vehicle and electric vehicle power train systems
• Automotive infotainment and instrument cluster circuits
• Body control module logic interfaces

Procurement Notes

Verify the specific 'H' suffix indicates the required temperature test option before procurement. Confirm package dimensions match the VSSOP-8 footprint requirements. Ensure design accounts for the open-drain output needing an external pull-up resistor. Validate that the 2kV ESD rating meets system-level safety specifications.

Selection Notes

Select this component when high voltage tolerance up to 36V is required alongside low power operation. The 'B' variant offers superior offset voltage and lower bias current compared to standard versions. Consider the VSSOP-8 package for space-constrained PCB layouts. Verify compatibility with downstream logic levels using the open-drain output architecture.

Part Context

This device belongs to the LM2903-Q1 family, representing the next-generation LM2903B-Q1 series. It serves as a drop-in replacement for legacy comparators while providing improved electrical characteristics. The family includes various packages such as SOIC, TSSOP, and WSON, with the DGKRQ1 specifically denoting the VSSOP-8 automotive grade variant.

Replacement Considerations

LM2903BTQDGKRQ1

FAQ

What does the 'H' suffix indicate in the part number?

The 'H' suffix denotes a specific temperature test option where the device undergoes probe testing at 125°C during production.

Can the inputs exceed the supply voltage?

Yes, either or both inputs can go up to 36V without damage, even if the supply voltage is lower, provided the difference between supplies remains within limits.