LM2901BIRTER

Overview

The LM2901BIRTER is an automotive-grade quad differential voltage comparator from Texas Instruments, designed for high-precision applications. It operates on a single or dual supply ranging from 2V to 36V and supports an ambient temperature range of -40°C to +125°C. The device features low quiescent current (0.8mA typical), low input bias current (3.5nA typical), and low input offset voltage (±0.37mV typical). It utilizes a WQFN-16 package with an exposed thermal pad.

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
• Open-drain output compatible with TTL, MOS, and CMOS logic

Applications

• Hybrid electric vehicle and electric vehicle power trains
• Automotive infotainment systems and instrument clusters
• Body control modules in vehicles
• Industrial equipment signal processing
• Home appliance control circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official orderable addendum to confirm the exact package type and tape-and-reel specifications. Ensure the component meets the required AEC-Q100 Grade 1 qualification for your target automotive environment. Cross-reference the datasheet revision date to confirm the electrical characteristics match your design requirements.

Selection Notes

Select this component when designing cost-sensitive automotive systems requiring drop-in replacement capabilities with improved performance over legacy comparators. Consider the WQFN-16 package for space-constrained layouts requiring an exposed thermal pad connected to ground. Evaluate the low propagation delay and high common-mode rejection for precise signal conditioning tasks.

Part Context

This device belongs to the LM2901x-Q1 family, representing the next-generation evolution of industry-standard comparators. It offers superior electrical characteristics compared to previous iterations, including lower offset voltage and higher supply voltage capability. The 'B' designation indicates enhanced ESD protection and improved negative input handling.

Replacement Considerations

The LM2901B-Q1 serves as a direct functional upgrade for standard LM2901-Q1 devices. Designers should verify pinout compatibility, noting that some manufacturers may transpose channel naming conventions while maintaining identical electrical connections.

FAQ

What is the maximum differential input voltage allowed?

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

How does the open-drain output function?

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

Is the common-mode input voltage range inclusive of ground?

Yes, the common-mode input voltage range includes the negative rail (ground) even when operated from a single power supply.