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Texas Instruments LM2903BRQDRQ1
- Part No.:
- LM2903BRQDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2903BRQDRQ1.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,802
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Product details
Overview
LM2903BRQDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified dual open-drain voltage 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 1 µs typical propagation delay. It serves in HEV/EV powertrain monitoring, body control module voltage supervision, and infotainment system level-shifting interfaces.
For engineers reviewing the LM2903BRQDRQ1 datasheet, LM2903BRQDRQ1 pinout, LM2903BRQDRQ1 application, or LM2903BRQDRQ1 equivalent, this page delivers verified electrical specs, automotive-grade thermal and ESD performance (2 kV HBM), SOIC-8 package details, and functional safety documentation support - all critical for safety-critical sensor interface and fault-detection circuit design.
Technical Context
The LM2903BRQDRQ1 implements two independent PNP Darlington-pair input comparators with rail-to-rail common-mode input range down to ground and up to VCC − 1.5 V. Its open-drain NPN output stage enables flexible logic-level translation and wired-AND functionality across mixed-voltage domains.
It supports single-supply operation from 2 V to 36 V or dual supplies with up to 36 V differential, while maintaining stable performance over −40°C to +125°C ambient. Input clamp circuitry (Q15) ensures defined low-state output when inputs exceed common-mode limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - enables direct interface with 12 V/24 V automotive batteries and 3.3 V/5 V logic without level shifters. |
| Input Offset Voltage (typ) | ±0.37 mV - improves accuracy in precision threshold detection (e.g., battery undervoltage lockout at ±10 mV tolerance). |
| Input Bias Current (typ) | 3.5 nA - minimizes loading on high-impedance sensor references (e.g., thermistor dividers or potentiometer-based position sensors). |
| Propagation Delay (typ) | 1 µs - supports real-time response in motor phase fault detection and overcurrent trip circuits. |
| ESD Rating (HBM) | 2 kV - meets AEC-Q100 stress requirements for robustness in automotive assembly and field environments. |
| Output Type | Open-drain - allows pull-up to any logic rail (e.g., 1.8 V, 3.3 V, or 5 V MCU I/O), enabling voltage translation and multi-comparator wired-AND outputs. |
| Ambient Temp Range | −40°C to +125°C - certified for Grade 1 automotive use in engine bay, transmission control, and ADAS subsystems. |
Pinout & Package
LM2903BRQDRQ1 is packaged in an 8-pin SOIC (D) package with 4.90 mm × 3.91 mm body size and standard 1.27 mm pitch. The device uses a surface-mount, gull-wing lead configuration compatible with automated reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-drain NPN collector - requires external pull-up; sinks current when IN− > IN+ + VIO. |
| 1IN− | Comparator 1 inverting input | Negative input node of first comparator - accepts voltages from GND to VCC − 1.5 V. |
| 1IN+ | Comparator 1 non-inverting input | Positive input node of first comparator - same voltage range as 1IN−; supports ground-referenced sensing. |
| GND | Ground reference | Primary return path for supply and input signals; connects thermal pad in WSON variants (not applicable to SOIC). |
| VCC | Positive supply | Single-supply rail (2–36 V); also serves as upper limit for common-mode input range. |
| 2OUT | Comparator 2 output | Independent open-drain output - electrically isolated from 1OUT; enables dual-threshold or redundant monitoring. |
| 2IN− | Comparator 2 inverting input | Second comparator's negative input - identical electrical behavior to 1IN−. |
| 2IN+ | Comparator 2 non-inverting input | Second comparator's positive input - fully independent; supports differential or independent signal comparison. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation with HBM 2 kV / CDM 1 kV - ensures reliability in powertrain and chassis ECUs. |
| Dual independent comparators | Enables simultaneous monitoring of two distinct thresholds (e.g., overvoltage and undervoltage on same rail) without cross-talk. |
| Ground-sensing input range | Common-mode voltage includes 0 V - allows direct interface with shunt-based current sense amplifiers and battery ground-referenced sensors. |
| Low quiescent current | 600 µA typical total supply current at 5 V - reduces standby power in always-on vehicle modules (e.g., door module wake-up detection). |
| Functional safety documentation | TI provides FIT rate data, failure mode analysis, and safety manual - supports ISO 26262 ASIL-B system integration. |
Applications
| HEV/EV Battery Supervision | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Monitoring cell stack voltage and pack isolation resistance in 400 V EV battery management systems. IC Role / Device Role / Timing Role: Dual comparator performs window-compare on voltage divider outputs and detects leakage via resistive divider + comparator threshold. Use Value: ±0.37 mV offset enables accurate 10 mV threshold resolution at 400 V scale; open-drain outputs interface directly with 3.3 V MCU GPIOs. |
Use Scenario: Detecting door ajar status, seatbelt latch engagement, and headlight switch position using resistive or magnetic sensors. IC Role / Device Role / Timing Role: Comparator converts analog sensor voltage into clean digital logic signal for microcontroller interrupt input. Use Value: 2–36 V supply range eliminates need for local LDO; ground-sensing input supports direct connection to potentiometer wipers. |
| Infotainment Display Backlight Control | Powertrain Fault Detection |
|
Use Scenario: Enabling adaptive backlight dimming based on ambient light sensor output and ignition state. IC Role / Device Role / Timing Role: One comparator compares photodiode amplifier output to adjustable threshold; second monitors ignition voltage for sleep/wake transition. Use Value: 1 µs response time ensures rapid display brightness update; 125°C rating supports under-dash mounting near HVAC ducts. |
Use Scenario: Real-time detection of camshaft/crankshaft position sensor signal loss or out-of-phase condition in ICE engines. IC Role / Device Role / Timing Role: Comparator conditions Hall-effect or VR sensor signals into square waves for ECU timing capture. Use Value: 3.5 nA input bias prevents loading on high-Z VR sensor coils; 36 V absolute max input withstands load dump transients. |
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 | Same LM2903B-Q1 silicon, TSSOP-8 package (3.00 mm × 4.40 mm); 182.9°C/W RθJA vs. 154.1°C/W for SOIC. | Better board space efficiency but higher thermal resistance - preferred for compact PCBs with adequate airflow or heatsinking. | Select when footprint reduction outweighs thermal margin; verify junction temperature rise under full-load conditions. |
| TLV1702QDRQ1 | Rail-to-rail input, 36 V supply, but lower 0.35 mV offset and 0.15 µs propagation delay; consumes 120 µA per comparator. | Higher precision and speed at cost of reduced ESD robustness (1.5 kV HBM) and no AEC-Q100 Grade 0 option. | Choose for high-speed diagnostics where sub-microsecond response is mandatory and ESD environment is controlled. |
Compared with LM2903QPWRQ1, LM2903BRQDRQ1 offers superior thermal dissipation in SOIC packaging for sustained 125°C operation; versus TLV1702QDRQ1, it trades speed and offset for proven automotive ruggedness, wider ESD margin, and broader temperature qualification.
Availability
LM2903BRQDRQ1 is available at Aetrix Electronics and suitable for automotive powertrain control, body electronics, and infotainment systems requiring stable component supply across extended production lifecycles and rigorous environmental validation.
Supply support for LM2903BRQDRQ1 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 specializing in analog and embedded processing technologies, with deep expertise in automotive-grade IC design and functional safety certification.
The LM2903-Q1 family was engineered specifically for automotive voltage monitoring and fault-detection applications, delivering robust performance across harsh temperature, voltage transient, and ESD environments found in modern vehicles.
FAQ
What is the maximum supply voltage for LM2903BRQDRQ1?
The LM2903BRQDRQ1 supports a maximum supply voltage of 36 V, with absolute maximum ratings allowing up to 38 V differential supply (V+ − V−). This enables direct connection to 24 V commercial vehicle systems and compatibility with 12 V automotive batteries including load-dump transients. Operation remains specified from 2 V to 36 V per the recommended conditions table.
Does LM2903BRQDRQ1 support ground-referenced input signals?
Yes, LM2903BRQDRQ1 features a common-mode input voltage range that includes ground (0 V), extending from GND to VCC − 1.5 V. This allows direct interfacing with sensors referenced to chassis ground - such as thermistors, potentiometers, or current-sense shunts - without level-shifting circuitry.
Is LM2903BRQDRQ1 pin-compatible with legacy LM2903-Q1 devices?
Yes, LM2903BRQDRQ1 is a drop-in replacement for LM2903-Q1 in SOIC-8 packaging, sharing identical pinout, footprint, and basic electrical behavior. Key improvements - including ±0.37 mV offset, 3.5 nA input bias, and 2 kV HBM ESD - require no layout changes but enhance system accuracy and robustness.
What is the output configuration of LM2903BRQDRQ1?
LM2903BRQDRQ1 features two independent open-drain NPN outputs (1OUT and 2OUT). Each output sinks current when its respective comparator asserts low; external pull-up resistors define the logic-high voltage level, enabling interoperability with 1.8 V, 3.3 V, or 5 V MCUs and wired-AND logic functions.
How does LM2903BRQDRQ1 support functional safety compliance?
LM2903BRQDRQ1 is designated "Functional Safety-Capable" by Texas Instruments, with documented FIT rate, failure mode effects analysis (FMEA), and safety manual available. These resources aid ISO 26262 ASIL-B system-level development for automotive applications like battery disconnect monitoring and brake-by-wire supervision.
LM2903BRQDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
LM2903BRQDRQ1 FAQ
1.How can I place an order for LM2903BRQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903BRQDRQ1 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 LM2903BRQDRQ1 reliable?
The price and inventory of LM2903BRQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903BRQDRQ1 is usually 5 days.
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LM2903BRQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903BRQDRQ1 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 LM2903BRQDRQ1?
For technical support, including LM2903BRQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903BRQDRQ1 requirements.
6.How does Aetrix verify that LM2903BRQDRQ1 is sourced from the original manufacturer or authorized distributors?
All LM2903BRQDRQ1 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 LM2903BRQDRQ1 meets industry standards.
7.What is the process for return or replacement of LM2903BRQDRQ1?
All LM2903BRQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903BRQDRQ1, 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 LM2903BRQDRQ1 part is unused and in its original packaging.
Return procedure for LM2903BRQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2903BRQDRQ1 Tags
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