Texas Instruments LM2903BQDGKRQ1

Overview

LM2903BQDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified dual open-drain comparator for automotive systems, operating from 2 V to 36 V supply, with ±0.37 mV typical input offset voltage, 3.5 nA typical input bias current, and 200 µA typical quiescent current per comparator. It serves in HEV/EV powertrain monitoring, body control module voltage supervision, and infotainment system level-shifting interfaces.

For engineers reviewing the LM2903BQDGKRQ1 datasheet, LM2903BQDGKRQ1 pinout, LM2903BQDGKRQ1 application, or LM2903BQDGKRQ1 equivalent, key selection criteria include its automotive-grade temperature range (–40°C to +125°C), 2 kV HBM ESD rating, open-drain output compatibility with TTL/MOS/CMOS, differential input voltage range up to ±38 V, and VSSOP-8 package footprint.

Technical Context

The LM2903BQDGKRQ1 implements a PNP Darlington-pair input stage enabling high gain, low input bias current, and common-mode input range extending to ground. Its open-drain NPN output stage supports wired-AND logic and flexible pull-up configuration across diverse logic families.

It operates over a wide supply range (2 V to 36 V) with supply-current independence from voltage, supports single- or dual-supply configurations (with supply difference ≤36 V), and includes internal ESD protection structures meeting AEC-Q100 HBM Class H2C (2 kV) and CDM Class C4B (1 kV).

Key Specifications

Pinout & Package

VSSOP-8 package (3.00 mm × 4.40 mm), thermally enhanced with exposed pad connected to GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual open-drain comparator applications.

Compared with LM2903QPWRQ1, LM2903BQDGKRQ1 offers superior ESD robustness and marginally better thermal performance; compared with TLV1702QDRQ1, it trades precision and ultra-low IQ for proven ruggedness, wider legacy support, and direct pin compatibility in existing VSSOP layouts.

Availability

LM2903BQDGKRQ1 is available at Aetrix Electronics and suitable for HEV/EV powertrain monitoring, automotive body control modules, and infotainment system level-shifting applications requiring stable component supply across extended production lifecycles.

Supply support for LM2903BQDGKRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions for automotive, industrial, and personal electronics markets.

The LM2903-Q1 family was designed specifically for automotive subsystems requiring AEC-Q100 qualification, wide supply tolerance, and robust operation in harsh environments - including powertrain, chassis, and body electronics.

FAQ

What is the maximum supply voltage rating for LM2903BQDGKRQ1?

The LM2903BQDGKRQ1 has an absolute maximum supply voltage (VS = V+ – V−) of 38 V. Its recommended operating supply range is 2 V to 36 V. Exceeding 38 V risks permanent damage, and operation above 36 V is outside specified conditions. This rating enables direct use with 24 V automotive systems including load-dump transient margins.

Does LM2903BQDGKRQ1 support rail-to-rail input operation?

LM2903BQDGKRQ1 supports common-mode input voltage from ground (GND) up to VCC – 1.5 V for the inverting input, and the non-inverting input can exceed VCC without damage - enabling true rail-to-ground operation and high-side sensing. However, it does not support rail-to-rail input swing across the full supply range like modern CMOS comparators.

Can LM2903BQDGKRQ1 outputs be wire-OR'd together?

Yes, LM2903BQDGKRQ1 features open-drain outputs that can be directly connected to a shared pull-up resistor - enabling wired-AND logic for fault aggregation (e.g., combining multiple overtemperature flags). Ensure total sink current remains within 25 mA per output and that pull-up voltage matches downstream logic requirements.

What is the typical propagation delay of LM2903BQDGKRQ1 at 5 V supply?

At VS = 5 V, LM2903BQDGKRQ1 exhibits 300 ns typical high-to-low propagation delay with TTL-level input signals (1.4 V reference), and 1000 ns typical for small-signal transitions (5 mV overdrive). Delay varies with overdrive, load capacitance, and supply voltage - full characterization is provided in Section 2.10 of the datasheet.

Is LM2903BQDGKRQ1 pin-compatible with standard LM2903 variants?

Yes, LM2903BQDGKRQ1 in VSSOP-8 (DGK) package maintains identical pinout and footprint with LM2903QDGKRQ1 and LM2903QPWRQ1. Electrical differences - including lower offset voltage, improved ESD rating, and tighter parametric distributions - make it a direct drop-in upgrade for existing designs targeting enhanced performance and reliability.