LM2903BTQPWRQ1

Overview

The LM2903BTQPWRQ1 is an automotive-grade dual differential comparator from the LM2903B-Q1 family, manufactured by Texas Instruments. It operates on a single or dual supply voltage ranging from 2V to 36V and supports an ambient temperature range of -40°C to +125°C. The device features low quiescent current (typically 200µA per comparator), low input bias current (3.5nA typical), and low input offset voltage (±0.37mV typical). It utilizes an open-drain output compatible with TTL, MOS, and CMOS logic levels.

Feature Summary

• Qualified for automotive applications under AEC-Q100 standards
• Enhanced electrostatic discharge protection with 2kV HBM rating
• Low power consumption independent of supply voltage
• Differential input voltage range matches maximum rated supply voltage

Applications

• Hybrid electric vehicle and electric vehicle power trains
• Automotive infotainment systems and instrument clusters
• Body control modules
• Industrial automation equipment
• Consumer appliances

Procurement Notes

Verify that the component ordering suffix corresponds to the TSSOP-8 package and specific temperature testing options. Confirm AEC-Q100 Grade 1 qualification status for the required operating temperature range. Ensure design implementation accounts for the open-drain output configuration requiring external pull-up resistors for proper logic level interfacing.

Selection Notes

Select this component when high voltage tolerance up to 36V is required alongside strict automotive reliability standards. The LM2903B-Q1 variant offers superior electrical performance compared to standard LM2903-Q1 devices, including lower offset voltage and improved ESD robustness. Consider the TSSOP-8 package dimensions if board space constraints exist within the target application module.

Part Context

This part belongs to the LM2903-Q1 family of dual comparators designed for cost-sensitive automotive environments. The 'B' designation indicates next-generation improvements over the original LM2903-Q1, providing drop-in replacement convenience while delivering enhanced specifications such as reduced propagation delay and lower supply current across the full operating temperature range.

Replacement Considerations

LM2903-Q1

FAQ

What is the common-mode input voltage range?

The common-mode input voltage range extends from ground (V-) to V+ minus 1.5V at room temperature, and down to V+ minus 2.0V across the full industrial temperature range.

How does the open-drain output function?

The output consists of an NPN transistor that sinks current when the negative input voltage exceeds the positive input voltage. An external pull-up resistor is required to define the high logic level voltage.

Is functional safety documentation available?

Yes, documentation is available to aid in functional safety system design, making the device functional safety-capable.