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Texas Instruments LM2903DR-NG
- Part No.:
- LM2903DR-NG
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2903DR-NG.pdf
- Description:
- PROTOTYPE
- Quantity:
- Payment:
- Shipping:
Inventory:3,993
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Product details
Overview
LM2903DR-NG from Texas Instruments is an AEC-Q100 Grade 1 qualified dual voltage comparator designed for automotive and industrial systems requiring robust, wide-supply operation. It features ±0.37 mV typical input offset voltage, 200 µA typical supply current per comparator, open-drain outputs compatible with TTL/MOS/CMOS, and operates from 2 V to 36 V single or dual supplies - enabling use in battery monitoring, power rail supervision, and HEV/EV body control modules.
For engineers reviewing the LM2903DR-NG datasheet, LM2903DR-NG pinout, LM2903DR-NG application, or LM2903DR-NG equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade thermal and ESD performance (2 kV HBM), and real-world implementation context for safety-critical analog signal comparison.
Technical Context
The LM2903DR-NG 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 - critical for sensing near 0 V in automotive sensor interfaces. Its open-drain NPN output stage supports wired-AND logic and flexible level-shifting across supply domains up to 36 V.
It operates over –40°C to +125°C ambient temperature, meets AEC-Q100 Grade 1 requirements, and includes internal ESD protection (2 kV HBM, 1 kV CDM). The device supports differential input voltages up to ±36 V and maintains stable propagation delay (≤1 µs typ) across its full operating voltage and temperature range.
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 - ensures accurate threshold detection in precision voltage monitoring (e.g., battery cell balancing) |
| Supply Current (per comparator) | 200 µA typical at 5 V - supports low-power always-on supervision in infotainment and ADAS subsystems |
| Input Bias Current (typ) | 3.5 nA - minimizes error in high-impedance sensor circuits (e.g., thermistor or potentiometer interfaces) |
| Propagation Delay (typ) | 1 µs at 5 V - provides fast response for overvoltage/undervoltage fault detection in power train control |
| Output Type | Open-drain - allows wired-AND configuration and flexible pull-up to any logic rail (e.g., 3.3 V MCU I/O) |
| ESD Rating (HBM) | 2 kV - exceeds AEC-Q100 Class H1C requirement for robustness in manufacturing and vehicle environments |
Pinout & Package
LM2903DR-NG is supplied in an SOIC-8 package (4.90 mm × 3.91 mm), optimized for automotive PCB layouts with thermal reliability and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-drain NPN sink - requires external pull-up; drives low when IN+ < IN− + VIO |
| 1IN− | Comparator 1 inverting input | Negative reference input node - accepts signals down to −0.3 V (with clamping) |
| 1IN+ | Comparator 1 non-inverting input | Signal input node - supports common-mode range to ground and up to VCC − 1.5 V |
| GND | Ground reference | Return path for inputs, outputs, and bias circuitry - must be low-impedance for noise immunity |
| VCC | Positive supply | Single-supply rail (2–36 V) or positive rail of dual supply - powers internal bias and output stage |
| 2OUT | Comparator 2 output | Independent open-drain output - enables dual-threshold detection or redundancy in safety systems |
| 2IN− | Comparator 2 inverting input | Second independent negative input - supports differential or independent signal monitoring |
| 2IN+ | Comparator 2 non-inverting input | Second independent positive input - allows simultaneous comparison of two sensor channels |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C) - certified for under-hood and cabin applications without derating |
| Wide supply range | 2 V to 36 V operation - eliminates need for dedicated LDOs in 12 V/24 V systems |
| Ground-sensing input | Common-mode range includes 0 V - enables direct interface with shunt-based current sensors and low-side switches |
| Differential input tolerance | ±36 V - protects against transients and reverse-battery conditions in automotive harnesses |
| Low quiescent current | 400–600 µA total (both comparators) - extends battery life in always-on vehicle modules |
Applications
| Overvoltage Protection Circuit | Battery Cell Monitoring |
|---|---|
Use Scenario: Detecting excessive voltage on a 12 V automotive rail before it damages downstream ECUs. IC Role / Device Role / Timing Role: Dual comparator compares sensed rail voltage against precision reference; one channel triggers shutdown, second validates fault persistence. Use Value: ±0.37 mV offset ensures trip point accuracy within ±10 mV at 12 V, reducing false positives in noisy engine-bay environments. | Use Scenario: Monitoring individual Li-ion cell voltages in a 48 V mild-hybrid battery pack. IC Role / Device Role / Timing Role: Each comparator independently checks cell voltage against upper/lower thresholds; open-drain outputs feed OR'd fault bus. Use Value: 200 µA per comparator enables continuous monitoring with <1 mW total dissipation - critical for thermal management in sealed battery enclosures. |
| Engine Coolant Level Sensor | Infotainment Display Backlight Control |
Use Scenario: Interpreting resistive coolant level sensor output to trigger dashboard warning at low-fluid threshold. IC Role / Device Role / Timing Role: Comparator converts analog resistance-to-voltage signal into clean digital flag for microcontroller GPIO. Use Value: Ground-referenced input allows direct connection to sensor's low-side resistor divider - no level-shifting components required. | Use Scenario: Enabling adaptive backlight dimming based on ambient light sensor output crossing preset thresholds. IC Role / Device Role / Timing Role: One comparator detects daylight (high lux), second detects darkness (low lux); outputs drive PWM enable logic. Use Value: 1 µs propagation delay ensures sub-millisecond response to rapid ambient changes - prevents visible flicker during sunrise/sunset transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2903QPWRQ1 | TSSOP-8 package (3.0 mm × 4.4 mm); identical electrical specs and AEC-Q100 Grade 1 rating | Smaller footprint and better thermal performance (RθJA = 182.9°C/W vs. 154.1°C/W) - preferred for space-constrained PCBs | Select when board area is constrained and thermal margin must be maximized in high-ambient zones. |
| TLV1702QDRQ1 | Lower offset (±0.75 mV max), rail-to-rail input, 1.8 V min supply - but higher quiescent current (120 µA per comparator) | Enables ultra-low-voltage operation (e.g., 1.8 V MCU interfaces) and improved DC accuracy, but not suitable for 36 V systems | Select only for low-voltage, high-precision applications where 36 V capability is unnecessary and supply headroom is limited. |
Compared with LM2903QPWRQ1, LM2903DR-NG offers larger SOIC-8 pads for easier soldering and higher thermal mass; compared with TLV1702QDRQ1, it retains full 36 V operation and lower IQ, making it the only choice for legacy 12 V/24 V automotive designs requiring proven field reliability.
Availability
LM2903DR-NG is available at Aetrix Electronics and suitable for automotive power train supervision, HEV/EV battery management, and infotainment system fault detection requiring stable component supply across extended production lifecycles.
Supply support for LM2903DR-NG 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 engineered specifically for automotive-grade dual-comparator applications demanding AEC-Q100 compliance, wide-voltage operation, and long-term reliability in harsh environments - including body control, power train, and cluster systems.
FAQ
What is the maximum supply voltage supported by the LM2903DR-NG?
The LM2903DR-NG 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 12 V automotive architectures with transient margin. Operation beyond 36 V risks permanent damage, and the device is not rated for 48 V nominal systems without external clamping.
Does the LM2903DR-NG support dual-supply operation?
Yes, the LM2903DR-NG supports dual-supply operation provided the difference between V+ and V− is between 2 V and 36 V, and V+ is at least 1.5 V more positive than the input common-mode voltage. This enables use in split-rail sensor signal conditioning, though most automotive implementations use single-supply configurations for simplicity and cost efficiency.
Is the LM2903DR-NG pin-compatible with standard LM2903 variants?
Yes, the LM2903DR-NG shares identical pinout and electrical behavior with industry-standard LM2903 devices in SOIC-8 packages, including LM2903D and LM2903DT. It maintains full functional and mechanical compatibility - allowing drop-in replacement in existing designs without layout changes or firmware updates.
What is the input common-mode voltage range of the LM2903DR-NG?
The LM2903DR-NG supports an input common-mode voltage range from ground (0 V) up to VCC − 1.5 V at 25°C, and VCC − 2.0 V over full temperature range. This ground-sensing capability enables direct interfacing with low-side current sense resistors and other 0 V–referenced sensors without level-shifting circuitry.
How does the LM2903DR-NG handle ESD events in automotive assembly environments?
The LM2903DR-NG is rated for 2 kV HBM and 1 kV CDM per AEC-Q100, exceeding baseline automotive ESD requirements. Its integrated protection diodes and process-hardened inputs mitigate damage during handling and PCB assembly - eliminating the need for external TVS devices in most chassis-grounded automotive modules.
LM2903DR-NG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Collector, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 2V ~ 30V, ±1V ~ 15V
- :
- 7mV @ 5V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 6mA @ 5V
- Current - Output (Typ):
- 1mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 1µs (Typ)
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C (TA)
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM2903DR-NG FAQ
1.How can I place an order for LM2903DR-NG through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903DR-NG 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 LM2903DR-NG reliable?
The price and inventory of LM2903DR-NG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903DR-NG is usually 5 days.
3.What payment methods are accepted for LM2903DR-NG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903DR-NG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903DR-NG?
LM2903DR-NG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903DR-NG 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 LM2903DR-NG?
For technical support, including LM2903DR-NG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903DR-NG requirements.
6.How does Aetrix verify that LM2903DR-NG is sourced from the original manufacturer or authorized distributors?
All LM2903DR-NG 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 LM2903DR-NG meets industry standards.
7.What is the process for return or replacement of LM2903DR-NG?
All LM2903DR-NG units undergo pre-shipment inspection (PSI). If there is an issue with LM2903DR-NG, 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 LM2903DR-NG part is unused and in its original packaging.
Return procedure for LM2903DR-NG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2903DR-NG Tags
-
LM2903DR
Texas Instruments
-
LM339DR
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LM339PWR
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LM393DT
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LM2901PWR
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LM2903DT
STMicroelectronics
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LM393DR
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LM239DR
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LM339APWR
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LM2903P
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LM393ADR
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NCX2200GMAZ
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