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Home > Products > Integrated Circuits (ICs) > Linear > Comparators

Texas Instruments LM2903BRQDGKRQ1

Name: LM2903BRQDGKRQ1
Brand: Texas Instruments
SKU: LM2903BRQDGKRQ1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM2903BRQDGKRQ1

Manufacturer:: Texas Instruments

Category:: Comparators

Package:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Datasheet:: LM2903BRQDGKRQ1.pdf

Description:: IC COMPARATOR 2 DIFF 8VSSOP

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Product details

Overview

LM2903BRQDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified automotive dual open-drain comparator with ±0.37 mV typical input offset voltage, 200 µA typical supply current per comparator, and operation from 2 V to 36 V single supply. It serves as a precision voltage decision element in battery monitoring, motor control feedback, and power rail supervision circuits.

For engineers reviewing the LM2903BRQDGKRQ1 datasheet, LM2903BRQDGKRQ1 pinout, LM2903BRQDGKRQ1 application, or LM2903BRQDGKRQ1 equivalent, key selection criteria include its −40°C to +125°C ambient operating range, 3.5 nA typical input bias current, open-collector TTL/MOS/CMOS-compatible outputs, and qualification for HEV/EV powertrain and body control modules.

Technical Context

The LM2903BRQDGKRQ1 implements a PNP Darlington pair input stage enabling high gain, low input bias current (3.5 nA typ), and common-mode input range extending to ground. Its open-drain NPN output stage supports wired-AND logic and flexible level-shifting across 2 V–36 V domains.

It features dedicated ESD protection on all pins (2 kV HBM, 1 kV CDM), tri-temp tested variants (−40°C/25°C/125°C), and guaranteed operation up to 36 V supply with differential input voltage tolerance of ±38 V - exceeding standard 36 V rails for robustness in automotive transients.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2 V to 36 V - supports direct connection to 12 V/24 V automotive batteries and wide-input industrial supplies without regulation.
Input Offset Voltage (typ)	±0.37 mV - enables accurate threshold detection at sub-millivolt levels, critical for battery cell voltage monitoring.
Input Bias Current (typ)	3.5 nA - minimizes loading on high-impedance sensor sources such as thermistors or resistive divider references.
Propagation Delay (typ)	300 ns (TTL input) - ensures fast response for overvoltage/undervoltage fault detection in real-time safety-critical systems.
Output Type	Open-drain NPN - allows pull-up to any logic rail (e.g., 3.3 V MCU I/O) and wired-AND configuration for multi-sensor alarm aggregation.
ESD Rating (HBM)	2 kV - exceeds AEC-Q100 H1C classification, supporting reliable handling and assembly in automotive manufacturing environments.
Ambient Temp Range	−40°C to +125°C - meets Grade 1 automotive requirements for under-hood and cabin-mounted ECUs.

Pinout & Package

VSSOP-8 (DGK) package: 3.00 mm × 4.40 mm body, 0.65 mm pitch, exposed thermal pad connected directly to GND.

Pin/Terminal	Circuit Role	Design Meaning
1OUT	Comparator 1 output	Open-drain NPN collector - requires external pull-up; sinks current when IN+ < IN− + V_IO.
1IN−	Comparator 1 inverting input	High-impedance PNP Darlington base - accepts signals down to GND; supports rail-to-rail common-mode range.
1IN+	Comparator 1 non-inverting input	High-impedance PNP Darlington base - can exceed V_CC by up to 36 V without damage.
GND	Ground reference	Common return for supply, inputs, and thermal pad - must connect exposed pad to GND for thermal and EMI performance.
2IN+	Comparator 2 non-inverting input	Independent high-Z input - enables dual-threshold or window comparator configurations with shared V_CC/GND.
2IN−	Comparator 2 inverting input	Independent high-Z input - supports differential sensing or independent signal comparison.
2OUT	Comparator 2 output	Open-drain NPN collector - electrically isolated from 1OUT; enables independent logic-level translation per channel.
V_CC	Positive supply	Single-supply input - powers both comparators; no negative supply required; tolerant of load-dump transients up to 36 V.

Key Features

Feature	Design Value
Automotive qualification	AEC-Q100 Grade 1 (−40°C to +125°C) - certified for use in powertrain, infotainment, and body control modules.
Low input offset voltage	±0.37 mV typical - reduces false triggering in precision voltage monitoring applications like 12 V battery state-of-charge estimation.
Ultra-low quiescent current	200 µA per comparator at 5 V - extends battery life in always-on vehicle subsystems such as door module wake-up detection.
Robust input voltage range	Inputs tolerate −0.3 V to +38 V - withstands reverse-battery and load-dump conditions without clamping diodes or external protection.
Open-drain output architecture	Supports mixed-voltage interfacing - e.g., 36 V sensor input compared against 2.5 V reference, driving 3.3 V MCU GPIO with 10 kΩ pull-up.

Applications

Battery Management System (BMS)	Motor Control Feedback Loop
Use Scenario: Monitoring individual Li-ion cell voltages in a 12 V auxiliary battery pack to detect overvoltage and undervoltage faults. IC Role / Device Role / Timing Role: Dual comparator performing independent high/low threshold comparison on each cell's voltage via precision resistor dividers. Use Value: ±0.37 mV offset enables ±5 mV detection accuracy at 3.6 V nominal cell voltage, meeting ISO 26262 ASIL-B functional safety requirements for fault detection latency.	Use Scenario: Detecting zero-crossing events in BLDC motor phase currents for commutation timing in EPS (Electric Power Steering). IC Role / Device Role / Timing Role: High-speed comparator converting analog current-sense amplifier output into clean digital edge for MCU timer capture. Use Value: 300 ns propagation delay ensures ≤1.5° electrical angle timing error at 10 kHz PWM frequency, maintaining torque stability and acoustic noise control.
Automotive Body Control Module (BCM)	HEV/EV DC-DC Converter Supervision
Use Scenario: Validating ignition switch position (ACC/ON/START) by comparing sensed voltage against multiple thresholds before enabling solenoid drivers. IC Role / Device Role / Timing Role: Dual comparator implementing window detection on switched 12 V rail to distinguish between ACC (9–11 V), ON (12–14 V), and START (≥10 V pulse). Use Value: Independent channels allow simultaneous high/low threshold evaluation with no shared reference, eliminating timing skew between states.	Use Scenario: Monitoring output voltage of a 48 V–12 V bidirectional DC-DC converter to trigger shutdown during overvoltage (>15.5 V) or undervoltage (<10.5 V) events. IC Role / Device Role / Timing Role: Precision comparator comparing scaled converter output against stable bandgap reference, driving fault latch via open-drain OR-ing. Use Value: 2 kV HBM ESD rating ensures reliability during automated PCB assembly and field service replacement in high-vibration EV power electronics bays.

Battery Management System (BMS)

Motor Control Feedback Loop

Use Scenario: Monitoring individual Li-ion cell voltages in a 12 V auxiliary battery pack to detect overvoltage and undervoltage faults.

IC Role / Device Role / Timing Role: Dual comparator performing independent high/low threshold comparison on each cell's voltage via precision resistor dividers.

Use Value: ±0.37 mV offset enables ±5 mV detection accuracy at 3.6 V nominal cell voltage, meeting ISO 26262 ASIL-B functional safety requirements for fault detection latency.

Use Scenario: Detecting zero-crossing events in BLDC motor phase currents for commutation timing in EPS (Electric Power Steering).

IC Role / Device Role / Timing Role: High-speed comparator converting analog current-sense amplifier output into clean digital edge for MCU timer capture.

Use Value: 300 ns propagation delay ensures ≤1.5° electrical angle timing error at 10 kHz PWM frequency, maintaining torque stability and acoustic noise control.

Automotive Body Control Module (BCM)

HEV/EV DC-DC Converter Supervision

Use Scenario: Validating ignition switch position (ACC/ON/START) by comparing sensed voltage against multiple thresholds before enabling solenoid drivers.

IC Role / Device Role / Timing Role: Dual comparator implementing window detection on switched 12 V rail to distinguish between ACC (9–11 V), ON (12–14 V), and START (≥10 V pulse).

Use Value: Independent channels allow simultaneous high/low threshold evaluation with no shared reference, eliminating timing skew between states.

Use Scenario: Monitoring output voltage of a 48 V–12 V bidirectional DC-DC converter to trigger shutdown during overvoltage (>15.5 V) or undervoltage (<10.5 V) events.

IC Role / Device Role / Timing Role: Precision comparator comparing scaled converter output against stable bandgap reference, driving fault latch via open-drain OR-ing.

Use Value: 2 kV HBM ESD rating ensures reliability during automated PCB assembly and field service replacement in high-vibration EV power electronics bays.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM2903QPWRQ1	TSSOP-8 package (3.00 mm × 4.40 mm); same electrical specs but higher R_θJA (182.9°C/W vs. 176.5°C/W for DGK).	Less thermal efficiency in high-power-density layouts; suitable where board space permits larger footprint.	Select when TSSOP is preferred for legacy layout compatibility or hand-soldering feasibility.
TLV1702QDRQ1	Rail-to-rail input, 1.8 V–36 V supply, 350 µA IQ, 1.2 µs response - lower precision (±1.5 mV V_IO) but wider input range.	Not qualified for Grade 1 temp range; max 125°C junction, not ambient - unsuitable for under-hood placement.	Choose only for non-ambient-temperature-critical locations (e.g., center console) where rail-to-rail input is mandatory.

Compared with LM2903QPWRQ1 and TLV1702QDRQ1, the LM2903BRQDGKRQ1 delivers superior offset voltage (±0.37 mV vs. ±4 mV/±1.5 mV) and guaranteed Grade 1 ambient operation - making it the only option qualified for engine bay–mounted BMS and motor control sensors requiring long-term drift stability.

Availability

LM2903BRQDGKRQ1 is available at Aetrix Electronics and suitable for automotive battery management, motor control feedback, and body control module designs requiring stable component supply across extended product lifecycles.

Supply support for LM2903BRQDGKRQ1 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, embedded processing, and connectivity solutions for automotive, industrial, and personal electronics markets.

The LM2903-Q1 family was designed specifically for automotive-grade voltage comparison tasks - emphasizing AEC-Q100 qualification, wide supply tolerance, and robust input/output behavior in harsh electrical environments.

FAQ

What is the maximum supply voltage rating for LM2903BRQDGKRQ1?

The LM2903BRQDGKRQ1 supports a maximum supply voltage of 36 V, with absolute maximum ratings verified to 38 V for short-duration transients. This allows direct interface with 24 V commercial vehicle systems and compatibility with ISO 7637-2 Pulse 5a/b load-dump waveforms without external clamping. The LM2903BRQDGKRQ1 maintains full functionality across its entire 2 V–36 V operating range.

Does LM2903BRQDGKRQ1 support dual-supply operation?

Yes, the LM2903BRQDGKRQ1 supports dual-supply operation provided the difference between V+ and V− is within 2 V to 36 V, and V+ is at least 1.5 V more positive than the input common-mode voltage. However, its primary design intent and qualification are for single-supply automotive applications (e.g., 12 V or 24 V battery referenced to GND), and dual-supply use requires careful validation of input voltage limits relative to both rails.

What is the purpose of the exposed thermal pad on the DGK package of LM2903BRQDGKRQ1?

The exposed thermal pad on the LM2903BRQDGKRQ1's VSSOP-8 (DGK) package must be soldered directly to the PCB GND plane to provide a low-thermal-resistance path (R_θJB = 112.4°C/W) and reduce junction temperature rise. It also improves EMI immunity and mechanical stability. TI specifies that the pad be connected exclusively to GND - no thermal vias to internal layers are required, but ≥4 thermal vias to solid GND planes are recommended for optimal performance in automotive under-hood environments.

How does the LM2903BRQDGKRQ1 handle input voltages exceeding V_CC?

The LM2903BRQDGKRQ1 allows either input (IN+ or IN−) to exceed V_CC by up to 36 V without damage, thanks to internal clamping structures and ESD-optimized input transistors. This capability enables direct sensing of high-side signals (e.g., 48 V bus monitoring) while powering the device from a lower 5 V rail - eliminating level-shifters in many automotive subsystems. The LM2903BRQDGKRQ1 maintains valid output states even when inputs operate outside the supply domain.

Is LM2903BRQDGKRQ1 pin-compatible with legacy LM2903-Q1 variants?

Yes, the LM2903BRQDGKRQ1 shares identical pinout, footprint, and electrical interface with all LM2903-Q1 family members in the same package (e.g., SOIC-8, VSSOP-8, TSSOP-8). It is a drop-in replacement offering improved specifications - including lower offset voltage (±0.37 mV vs. ±4 mV), lower supply current (200 µA vs. 600 µA), and enhanced 2 kV HBM ESD protection - without requiring PCB or firmware changes.

LM2903BRQDGKRQ1 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: General Purpose

Number of Elements:: 2

Output Type:: Open-Collector, Rail-to-Rail

Voltage - Supply, Single/Dual (±):: 2V ~ 36V

:: 2.5mV @ 5V

Voltage - Input Offset (Max):: 0.025µA @ 5V

Current - Input Bias (Max):: 21mA @ 5V

Current - Output (Typ):: 600µA

Current - Quiescent (Max):: -

CMRR, PSRR (Typ):: 300ns (Typ)

Propagation Delay (Max):: -

Hysteresis:: -40°C ~ 125°C

Operating Temperature:: Automotive

Grade:: AEC-Q100

Qualification:: Surface Mount

:: 8-VSSOP

LM2903BRQDGKRQ1 FAQ

1.How can I place an order for LM2903BRQDGKRQ1 through Aetrix?

Please submit a Request for Quotation (RFQ) for LM2903BRQDGKRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LM2903BRQDGKRQ1 reliable?

The price and inventory of LM2903BRQDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903BRQDGKRQ1 is usually 5 days.

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LM2903BRQDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM2903BRQDGKRQ1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LM2903BRQDGKRQ1?

For technical support, including LM2903BRQDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903BRQDGKRQ1 requirements.

6.How does Aetrix verify that LM2903BRQDGKRQ1 is sourced from the original manufacturer or authorized distributors?

All LM2903BRQDGKRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM2903BRQDGKRQ1 meets industry standards.

7.What is the process for return or replacement of LM2903BRQDGKRQ1?

All LM2903BRQDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903BRQDGKRQ1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LM2903BRQDGKRQ1 part is unused and in its original packaging.

Return procedure for LM2903BRQDGKRQ1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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