LM2903BHQDRQ1

Overview

The LM2903BHQDRQ1 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 (0.6mA to 0.8mA typical), low input bias current (3.5nA typical), and low input offset voltage (±0.37mV typical). It provides open-drain outputs compatible with TTL, MOS, and CMOS logic. The component is AEC-Q100 Grade 1 qualified with improved 2kV HBM ESD protection and is housed in an SOIC-8 package.

Feature Summary

• Qualified for automotive applications with AEC-Q100 Grade 1 certification
• Improved electrostatic discharge performance with 2kV Human Body Model rating
• Low power consumption with supply current independent of voltage
• High precision with low input offset voltage and bias current

Applications

• Hybrid electric vehicle and electric vehicle power train systems
• Automotive infotainment and instrument cluster circuits
• Body control module applications
• Industrial automation systems
• Consumer appliance control logic

Procurement Notes

Verify the specific suffix 'H' indicates the required temperature test option before procurement. Confirm the SOIC-8 package dimensions match the design footprint. Ensure the system design accounts for the open-drain output requirement by including appropriate pull-up resistors. Validate that the 36V maximum supply voltage aligns with the target application's power rails.

Selection Notes

Select this component when high voltage tolerance up to 36V is required alongside low power consumption. The LM2903B-Q1 offers superior offset voltage and ESD performance compared to standard LM2903-Q1 variants. Consider the open-drain output architecture for level shifting between different logic voltage domains. Verify thermal management requirements based on the junction-to-ambient resistance for the SOIC-8 package.

Part Context

This device belongs to the LM2903-Q1 family of dual comparators designed for cost-sensitive automotive and industrial applications. The 'B' designation signifies enhanced electrical characteristics, including lower offset voltage and higher supply voltage capability compared to previous generations. It serves as a drop-in replacement for legacy LM2903 devices while providing improved reliability and performance metrics for modern electronic designs.

Replacement Considerations

LM2903QDRQ1

FAQ

What is the maximum differential input voltage the LM2903BHQDRQ1 can withstand?

The differential input voltage range is equal to the maximum-rated supply voltage, which is ±36 V.

Does the LM2903BHQDRQ1 support shutdown functionality?

No, the device does not have a shutdown feature; it operates continuously within its recommended operating conditions.

How does the output configuration affect circuit design?

The open-drain output requires an external pull-up resistor to define the high logic level and allows connection to other open-collector outputs for wired-AND functionality.