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Texas Instruments LM2903QDRQ1
- Part No.:
- LM2903QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2903QDRQ1.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,822
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Product details
Overview
LM2903QDRQ1 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 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 LM2903QDRQ1 datasheet, LM2903QDRQ1 pinout, LM2903QDRQ1 application, or LM2903QDRQ1 equivalent, this page delivers verified technical context, automotive-grade thermal and ESD specifications, SOIC-8 package layout details, functional safety documentation support, and validated alternative comparators for design-in continuity.
Technical Context
The LM2903QDRQ1 implements a PNP Darlington-pair input stage enabling rail-to-rail common-mode operation down to ground and up to VCC − 1.5 V, with internal clamping (Q15) ensuring valid output when inputs exceed VCM. Its open-drain NPN output supports wired-AND logic and flexible pull-up voltage selection across domains.
It operates over −40°C to +125°C ambient, supports single- or dual-supply configurations (VS = V+ − V− = 2 V to 36 V), and features 2 kV HBM / 1 kV CDM ESD robustness per AEC-Q100-002/011. Total quiescent current is 600 µA typical at 5 V, independent of supply voltage across full operating 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 domains without level shifters. |
| Input Offset Voltage (typ) | ±0.37 mV - Ensures accurate threshold detection in precision battery cell monitoring and sensor signal conditioning. |
| Input Bias Current (typ) | 3.5 nA - Minimizes loading error on high-impedance voltage dividers used in HV battery pack sensing. |
| Propagation Delay (typ) | 1 µs - Supports real-time fault response in motor control feedback loops and overvoltage protection circuits. |
| Common-Mode Input Range | Ground to VCC − 1.5 V - Allows direct connection to low-side shunt resistors and ground-referenced sensors. |
| ESD Rating (HBM/CDM) | 2 kV / 1 kV - Meets AEC-Q100 stress requirements for under-hood and chassis-mounted modules. |
| Quiescent Current (typ) | 600 µA - Enables always-on monitoring in low-power wake-up circuits without compromising battery life. |
Pinout & Package
LM2903QDRQ1 is packaged in an 8-pin SOIC (D) with body size 4.90 mm × 3.91 mm, rated for 154.1°C/W junction-to-ambient thermal resistance. The exposed pad is absent; all thermal dissipation occurs through leads and PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-drain NPN sink - Requires external pull-up to define logic-high level; enables wired-AND bus configuration. |
| 1IN− | Comparator 1 inverting input | High-impedance PNP Darlington base - Accepts signals down to ground; supports differential or single-ended sensing. |
| 1IN+ | Comparator 1 non-inverting input | High-impedance PNP Darlington base - Tolerates input voltages up to 36 V regardless of VCC, enabling overvoltage-safe monitoring. |
| GND | Ground reference | Common return for both comparators and internal bias - Must be low-impedance path to minimize noise coupling in mixed-signal environments. |
| VCC | Positive supply | Power rail for internal circuitry - Supports wide-range operation (2–36 V); no separate V− required for single-supply use. |
| 2IN+ | Comparator 2 non-inverting input | Independent high-Z input - Enables dual-threshold detection (e.g., window comparator) without cross-talk. |
| 2IN− | Comparator 2 inverting input | Independent high-Z input - Matches 1IN− electrical behavior; supports mirrored or asymmetric reference schemes. |
| 2OUT | Comparator 2 output | Open-drain NPN sink - Electrically isolated from 1OUT; allows independent pull-up voltages or shared bus with external diode OR-ing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation in automotive powertrain and body electronics per ISO/TS 16949. |
| Open-drain outputs | Enables level translation between disparate logic families (e.g., 3.3 V MCU detecting 12 V battery faults) and wired-AND fault aggregation. |
| Differential input voltage range | ±36 V - Permits safe comparison of signals referenced to different potentials (e.g., isolated DC-DC converter feedback). |
| Low input bias current | 3.5 nA typical - Preserves accuracy in high-resistance sensor interfaces (e.g., thermistor networks, potentiometer position sensing). |
| Functional safety documentation | TI provides FIT rate data, failure mode analysis, and diagnostic coverage guidance to accelerate ISO 26262 ASIL-B system certification. |
Applications
| HEV/EV Battery Management | Automotive Body Control Module |
|---|---|
Use Scenario: Monitoring individual cell voltages in a 400 V traction battery stack using resistive divider networks. IC Role / Device Role / Timing Role: Dual comparator performing overvoltage and undervoltage window detection on adjacent cells. Use Value: ±0.37 mV offset ensures <±5 mV total error at 4.2 V, meeting OEM cell balancing trigger thresholds without calibration. |
Use Scenario: Supervising 12 V supply rails for door lock actuators, lighting drivers, and HVAC blower motors. IC Role / Device Role / Timing Role: Independent voltage supervisor for each subsystem, triggering fault latching via open-drain outputs. Use Value: 2–36 V supply range eliminates need for local LDOs; 600 µA IQ enables continuous monitoring during sleep mode. |
| Infotainment Display Backlight Control | ADAS Camera Power Sequencing |
Use Scenario: Detecting backlight LED string open-circuit or overcurrent conditions via sense resistor voltage drop. IC Role / Device Role / Timing Role: Comparator comparing amplified sense voltage against programmable threshold to assert fault flag. Use Value: 1 µs propagation delay enables sub-millisecond fault response, preventing LED driver thermal runaway before thermal shutdown activates. |
Use Scenario: Validating correct power-up sequence of image sensor, ISP, and serializer ICs in rear-view camera modules. IC Role / Device Role / Timing Role: Dual comparator verifying VDDIO ≥ 1.8 V before enabling VCORE and clock distribution. Use Value: Ground-referenced common-mode range allows direct connection to LDO output pins without level shifting, reducing BOM count. |
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 |
|---|---|---|---|
| LM2903BQDRQ1 | Lower input offset voltage (±0.37 mV vs. ±4 mV max), improved 2 kV HBM ESD rating, same SOIC-8 footprint. | Better suited for precision battery cell monitoring where offset drift impacts state-of-charge accuracy. | Select LM2903BQDRQ1 when tighter offset spec and enhanced ESD immunity are required; drop-in replacement with identical pinout. |
| NCS2903DR2G | ON Semiconductor variant with −40°C to +125°C rating, ±7 mV max offset, 1.3 µs typical propagation delay, same SOIC-8 package. | Higher offset tolerance acceptable in non-critical supervisory functions like accessory power enable/disable. | Choose NCS2903DR2G for cost-sensitive designs where ±7 mV offset meets system-level accuracy requirements. |
Compared with LM2903QDRQ1, LM2903BQDRQ1 offers superior precision and ESD robustness for safety-critical monitoring, while NCS2903DR2G provides a second-source option with relaxed offset specs for less demanding subsystems-both maintain identical SOIC-8 mechanical compatibility and functional interface.
Availability
LM2903QDRQ1 is available at Aetrix Electronics and suitable for automotive powertrain control, body electronics, and infotainment systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM2903QDRQ1 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 reliability and functional safety.
The LM2903-Q1 family was designed specifically for automotive voltage comparison tasks-including battery monitoring, power sequencing, and fault detection-where wide supply range, AEC-Q100 compliance, and open-drain flexibility are mandatory.
FAQ
What is the maximum supply voltage supported by LM2903QDRQ1?
The LM2903QDRQ1 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 48 V mild-hybrid architectures without external regulation. Operation above 36 V risks permanent damage, and the device must not be subjected to transient spikes exceeding this limit even briefly.
Does LM2903QDRQ1 support dual-supply operation?
Yes, LM2903QDRQ1 supports dual-supply operation with VS = V+ − V− ranging from 2 V to 36 V, provided VCC is at least 1.5 V more positive than the input common-mode voltage. This enables use in bipolar signal conditioning circuits, such as op-amp comparator stages with split supplies, while maintaining full functionality across the −40°C to +125°C automotive temperature range.
Can LM2903QDRQ1 inputs safely exceed the VCC rail?
Yes, LM2903QDRQ1 inputs tolerate voltages up to 36 V regardless of VCC level, as confirmed by its ±36 V differential input voltage rating and absolute maximum input voltage specification of −0.3 V to 36 V. This enables direct monitoring of higher-voltage nodes (e.g., 12 V battery) while powered from a lower VCC (e.g., 3.3 V), eliminating level-shifter components in many automotive subsystems.
What is the purpose of the open-drain output configuration in LM2903QDRQ1?
The open-drain output in LM2903QDRQ1 allows external pull-up to any compatible logic voltage (e.g., 1.8 V, 3.3 V, 5 V, or 12 V), enabling seamless interfacing between disparate supply domains. It also supports wired-AND bus configurations for fault aggregation-multiple LM2903QDRQ1 outputs can share a single pull-up resistor and interrupt line, simplifying system-level fault reporting in distributed ECUs.
Is LM2903QDRQ1 compliant with functional safety standards?
Yes, LM2903QDRQ1 is functional safety-capable with documentation available to aid ISO 26262 system design. Texas Instruments provides FIT rate data, failure mode effect analysis (FMEA), and diagnostic coverage guidance for ASIL-B applications. While the device itself is not ASIL-certified, its robustness, predictable failure modes, and support documentation make it suitable for use in safety-related automotive subsystems when integrated per functional safety requirements.
LM2903QDRQ1 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
LM2903QDRQ1 FAQ
1.How can I place an order for LM2903QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903QDRQ1 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 LM2903QDRQ1 reliable?
The price and inventory of LM2903QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903QDRQ1 is usually 5 days.
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LM2903QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903QDRQ1 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 LM2903QDRQ1?
For technical support, including LM2903QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903QDRQ1 requirements.
6.How does Aetrix verify that LM2903QDRQ1 is sourced from the original manufacturer or authorized distributors?
All LM2903QDRQ1 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 LM2903QDRQ1 meets industry standards.
7.What is the process for return or replacement of LM2903QDRQ1?
All LM2903QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903QDRQ1, 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 LM2903QDRQ1 part is unused and in its original packaging.
Return procedure for LM2903QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2903QDRQ1 Tags
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