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Texas Instruments LM2903VQDRQ1
- Part No.:
- LM2903VQDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2903VQDRQ1.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,838
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Product details
Overview
LM2903VQDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified dual open-drain voltage comparator designed for automotive systems requiring robust operation across –40°C to +125°C ambient temperature. It supports single-supply operation up to 36 V, delivers ±0.37 mV typical input offset voltage, 3.5 nA typical input bias current, and 200 µA typical supply current per comparator - enabling precise threshold detection in HEV/EV powertrain monitoring and body control modules.
For engineers reviewing the LM2903VQDRQ1 datasheet, LM2903VQDRQ1 pinout, LM2903VQDRQ1 application, or LM2903VQDRQ1 equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade specifications, and real-world functional alternatives - all aligned with TI's SLCS141M production data sheet (December 2024 revision).
Technical Context
The LM2903VQDRQ1 implements a PNP Darlington-pair input stage enabling high DC gain (>200 V/mV), rail-to-rail common-mode input range down to ground, and differential input tolerance up to ±36 V. Its open-drain NPN output stage allows flexible logic-level translation via external pull-up resistors and supports wired-AND configurations.
It operates over 2 V to 36 V supply range with supply-current independence from voltage (600 µA max total quiescent current), features ESD protection rated at 2 kV HBM / 1 kV CDM, and includes internal clamping to force low output when inputs exceed VCM limits - critical for fault-tolerant automotive sensing.
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-shifting circuitry |
| Input Offset Voltage (typ) | ±0.37 mV - ensures accurate voltage window detection in battery cell monitoring and sensor signal conditioning |
| Input Bias Current (typ) | 3.5 nA - minimizes loading error on high-impedance sources such as thermistor networks or potentiometer-based position sensors |
| Propagation Delay (typ) | 300 ns (TTL input) - supports fast response in overvoltage/undervoltage lockout (OVLO/UVLO) circuits |
| Quiescent Current (max) | 800 µA at 36 V and –40°C to +125°C - meets low-power requirements for always-on vehicle subsystems |
| ESD Rating (HBM) | 2 kV - exceeds AEC-Q100 Grade 1 requirement and improves board-level robustness in manufacturing and field environments |
| Operating Temperature | –40°C to +125°C ambient - certified for engine bay, transmission, and ADAS ECU placement per AEC-Q100 Grade 1 |
Pinout & Package
LM2903VQDRQ1 is packaged in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, with standard pinout compatible across LM2903-Q1 family variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-drain NPN sink - requires external pull-up to define logic-high level; supports wired-AND and level translation |
| 1IN− | Comparator 1 inverting input | High-impedance PNP Darlington node - accepts signals down to GND and up to VCC − 1.5 V |
| 1IN+ | Comparator 1 non-inverting input | Same input structure as 1IN−; enables flexible reference or signal routing |
| GND | Ground reference | Common return for supply, inputs, and output pull-up - must be low-impedance for noise immunity |
| VCC | Positive supply | Single supply pin supporting 2 V–36 V - powers both comparators and internal bias circuitry |
| 2OUT | Comparator 2 output | Independent open-drain output - allows dual-threshold detection or redundant safety monitoring |
| 2IN− | Comparator 2 inverting input | Electrically isolated from 1IN− - enables independent signal comparison paths |
| 2IN+ | Comparator 2 non-inverting input | Matches 1IN+ functionality; supports differential or single-ended configuration per channel |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Enables simultaneous monitoring of two distinct thresholds - e.g., high/low battery voltage and overtemperature flags |
| Open-drain outputs | Permits flexible logic-level translation and wired-AND bus sharing - essential for fault-signaling in distributed automotive ECUs |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation with HBM 2 kV / CDM 1 kV ESD - reduces qualification burden for Tier 1 suppliers |
| Input common-mode range includes ground | Supports direct interface with grounded sensors (e.g., coolant temp thermistors) without level-shifting components |
| Low input bias current (3.5 nA typ) | Minimizes measurement error in high-Z voltage divider networks used in precision reference generation |
Applications
| Powertrain Overvoltage Detection | Body Control Module Window Lift Sensing |
|---|---|
Use Scenario: Monitoring 12 V battery rail during alternator load dump events to trigger shutdown before downstream damage. IC Role / Device Role / Timing Role: Dual comparator configured as window detector - one channel for upper threshold (16.5 V), one for lower (10.5 V). Use Value: ±0.37 mV offset and 300 ns propagation delay ensure reliable trip timing within ISO 7637-2 pulse 5a constraints. | Use Scenario: Detecting motor stall condition during power window lift by comparing current-sense voltage against calibrated threshold. IC Role / Device Role / Timing Role: Single comparator comparing amplified shunt voltage to fixed reference; open-drain output drives MCU interrupt pin. Use Value: 3.5 nA input bias avoids drift in high-resistance current-sense amplifier feedback network. |
| Infotainment System Power Sequencing | EV Battery Cell Balancing Monitor |
Use Scenario: Enforcing strict power-up sequence between SoC, display driver, and audio codec rails in digital cluster head units. IC Role / Device Role / Timing Role: Two independent comparators monitor enable voltages of three LDOs - generating synchronized enable signals via pull-up logic. Use Value: 2 V–36 V supply range allows direct monitoring of both 3.3 V logic and 12 V backlight supplies without auxiliary regulators. | Use Scenario: Detecting voltage imbalance across series-connected Li-ion cells to activate passive balancing FETs. IC Role / Device Role / Timing Role: Comparator compares individual cell voltage to reference derived from string midpoint; output controls gate driver enable. Use Value: Input common-mode range including ground permits direct connection to bottom-cell terminals without isolation amplifiers. |
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); identical electrical specs and AEC-Q100 Grade 1 rating | Better thermal performance (RθJA = 182.9°C/W vs. 154.1°C/W) but requires PCB layout change for smaller footprint | Select when board space is constrained and thermal margin is critical; not pin-compatible with SOIC |
| LM2903BQDRQ1 | Next-generation "B" variant: ±0.37 mV offset, 3.5 nA bias current, 2 kV HBM ESD, same SOIC-8 package | Drop-in replacement with improved accuracy and ESD robustness; fully backward-compatible with LM2903VQDRQ1 footprints and schematics | Preferred upgrade path for new designs seeking tighter tolerances and higher reliability without layout changes |
Compared with LM2903QPWRQ1, LM2903VQDRQ1 offers superior thermal dissipation in SOIC packaging but occupies more board area; compared with LM2903BQDRQ1, it shares identical pinout and function but exhibits slightly higher offset voltage and lower ESD rating - making the "B" variant optimal for next-gen automotive designs demanding tighter tolerances.
Availability
LM2903VQDRQ1 is available at Aetrix Electronics and suitable for automotive powertrain monitoring, body control module design, and infotainment system sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM2903VQDRQ1 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, with deep expertise in automotive-grade IC design, AEC-Q100 qualification, and functional safety development.
The LM2903-Q1 product line was engineered specifically for automotive voltage monitoring and fault-detection applications - emphasizing wide supply range, temperature resilience, and open-drain flexibility to simplify system-level safety architecture.
FAQ
What is the maximum supply voltage supported by LM2903VQDRQ1?
The LM2903VQDRQ1 supports a maximum supply voltage of 36 V, as specified in its absolute maximum ratings. This allows direct integration into 24 V commercial vehicle systems and compatibility with transient conditions defined in ISO 7637-2. Operation beyond 36 V risks permanent damage. The device maintains full functionality across its entire 2 V to 36 V operating range, including stable quiescent current and propagation delay performance.
Does LM2903VQDRQ1 have built-in ESD protection, and what level is certified?
Yes, LM2903VQDRQ1 is certified to AEC-Q100 with Human Body Model (HBM) ESD rating of 1 kV and Charged Device Model (CDM) rating of 750 V. These values meet Grade 1 requirements for automotive use. While the "B" variant (LM2903BQDRQ1) offers enhanced 2 kV HBM/1 kV CDM protection, LM2903VQDRQ1's certified ESD robustness ensures reliable handling during assembly and operation in harsh vehicle environments.
Can LM2903VQDRQ1 operate with inputs below ground potential?
No, LM2903VQDRQ1 does not support input voltages below ground. Its absolute maximum input voltage rating is –0.3 V relative to GND. Exceeding this limit may cause latch-up or parametric degradation. The input common-mode range extends from GND to VCC – 1.5 V, making it suitable for grounded-sensor interfaces but requiring external clamping or level-shifting for negative-going signals.
Is LM2903VQDRQ1 pin-compatible with LM2903BQDRQ1?
Yes, LM2903VQDRQ1 and LM2903BQDRQ1 share identical SOIC-8 (D) package dimensions, pinout, and footprint. Both devices use the same 1OUT, 1IN−, 1IN+, GND, VCC, 2OUT, 2IN−, 2IN+ arrangement. This allows direct PCB-level substitution - though LM2903BQDRQ1 delivers improved offset voltage (±0.37 mV vs. ±4 mV max) and higher ESD rating without layout changes.
What is the typical propagation delay of LM2903VQDRQ1 under automotive operating conditions?
The typical propagation delay of LM2903VQDRQ1 is 300 ns for TTL-level input transitions at 25°C and 5 V supply, per the switching characteristics table. At full temperature range (–40°C to +125°C) and 36 V supply, delay increases to ≤1 µs. This performance enables reliable response in critical automotive timing windows such as battery disconnect control and overcurrent flag assertion.
LM2903VQDRQ1 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, ±1V ~ 18V
- :
- 7mV @ 5V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 2.5mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- Automotive
- Grade:
- AEC-Q100
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM2903VQDRQ1 FAQ
1.How can I place an order for LM2903VQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903VQDRQ1 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 LM2903VQDRQ1 reliable?
The price and inventory of LM2903VQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903VQDRQ1 is usually 5 days.
3.What payment methods are accepted for LM2903VQDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903VQDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903VQDRQ1?
LM2903VQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903VQDRQ1 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 LM2903VQDRQ1?
For technical support, including LM2903VQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903VQDRQ1 requirements.
6.How does Aetrix verify that LM2903VQDRQ1 is sourced from the original manufacturer or authorized distributors?
All LM2903VQDRQ1 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 LM2903VQDRQ1 meets industry standards.
7.What is the process for return or replacement of LM2903VQDRQ1?
All LM2903VQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903VQDRQ1, 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 LM2903VQDRQ1 part is unused and in its original packaging.
Return procedure for LM2903VQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2903VQDRQ1 Tags
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