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Texas Instruments LM2903BRQPWRQ1
- Part No.:
- LM2903BRQPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2903BRQPWRQ1.pdf
- Description:
- IC COMPARATOR 2 DIFF 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,860
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Product details
Overview
LM2903BRQPWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified automotive dual open-drain comparator, designed for voltage comparison in harsh environments. It operates from 2 V to 36 V single supply (or ±18 V dual), delivers ±0.37 mV typical input offset voltage, 3.5 nA typical input bias current, and 200 µA typical quiescent current per comparator - enabling precise threshold detection in HEV/EV powertrain and body control modules.
For engineers reviewing the LM2903BRQPWRQ1 datasheet, LM2903BRQPWRQ1 pinout, LM2903BRQPWRQ1 application, or LM2903BRQPWRQ1 equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade operating parameters (–40°C to +125°C), and real-world functional alternatives with documented differences in offset, ESD, and supply current.
Technical Context
The LM2903BRQPWRQ1 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 differential input range extended to ±38 V. Its open-drain NPN output supports TTL/MOS/CMOS logic interfacing via external pull-up and enables wired-AND functionality.
It features dedicated on-chip ESD protection (2 kV HBM / 1 kV CDM), tri-temp production test options (–40°C / 25°C / 125°C), and functional safety documentation support. The device is optimized for drop-in replacement of legacy LM2903-Q1 while improving propagation delay (1 µs typical), input bias current (3.5 nA vs. 25 nA), and offset voltage (±0.37 mV vs. ±2 mV).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports wide-input automotive battery systems including cold-crank (≥4.5 V) and load-dump (≤42 V) transients when used with clamping. |
| Input Offset Voltage (typ) | ±0.37 mV - enables accurate voltage window detection at sub-mV thresholds, critical for battery cell monitoring and sensor signal conditioning. |
| Input Bias Current (typ) | 3.5 nA - minimizes error in high-impedance reference divider networks and resistive sensor interfaces. |
| Quiescent Current (per comp) | 200 µA - allows low-power always-on monitoring in body control modules without compromising system standby budget. |
| Propagation Delay (typ) | 1 µs - ensures timely response to fast-changing signals such as motor phase commutation or overvoltage fault detection. |
| ESD Rating (HBM) | 2 kV - exceeds AEC-Q100 H1C classification, reducing risk of field failure during assembly or service in vehicle harness environments. |
| Operating Temperature | –40°C to +125°C ambient - certified for Grade 1 automotive use in engine bay, powertrain, and infotainment subsystems. |
Pinout & Package
TSSOP-8 package (3.00 mm × 4.40 mm), thermally enhanced with exposed pad connected to GND for improved power dissipation in high-ambient automotive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-drain NPN sink - requires external pull-up to define logic-high level; enables level-shifting and wired-AND bus configurations. |
| 1IN− | Comparator 1 inverting input | Differential input node referenced to comparator's internal bias - accepts voltages from GND to VCC − 1.5 V. |
| 1IN+ | Comparator 1 non-inverting input | Differential input node - can exceed VCC without damage; supports high-side sensing above supply rail. |
| GND | Ground reference | Common return path for supply, inputs, and thermal pad - must be low-impedance connection for noise immunity and thermal stability. |
| VCC | Positive supply | Single-supply input (2 V–36 V); supports dual-supply operation if VCC − VEE ≤ 36 V and VCC ≥ VCM + 1.5 V. |
| 2IN+ | Comparator 2 non-inverting input | Independent high-impedance input - identical electrical behavior to 1IN+; enables dual-threshold or differential pair configurations. |
| 2IN− | Comparator 2 inverting input | Independent high-impedance input - identical electrical behavior to 1IN−; supports independent signal monitoring paths. |
| 2OUT | Comparator 2 output | Open-drain NPN sink - electrically isolated from 1OUT; allows independent pull-up values or shared bus implementation. |
Key Features
| Feature | Design Value |
|---|---|
| Grade 1 AEC-Q100 qualification | Validated for –40°C to +125°C ambient operation with full production test coverage - eliminates need for system-level requalification in automotive ECUs. |
| 2 kV HBM ESD protection | Integrated robustness against handling and harness-induced transients - reduces external TVS requirements in body electronics modules. |
| Open-drain outputs | Enables flexible logic-level translation (e.g., 3.3 V MCU interface with 12 V supply) and multi-comparator wired-AND fault-bus signaling. |
| Input common-mode range includes GND | Supports direct sensing of 0 V-referenced signals (e.g., current-sense shunts, battery negative terminals) without level-shifting circuitry. |
| Low 200 µA quiescent current | Permits continuous monitoring in always-on domains (e.g., door lock status, intrusion detection) without exceeding 10 µA system standby budget. |
| Differential input voltage range ±38 V | Withstands reverse-battery conditions and load-dump spikes up to 42 V when combined with external clamping - simplifies front-end protection design. |
Applications
| Motor Phase Monitoring | Battery Cell Voltage Thresholding |
|---|---|
|
Use Scenario: Real-time detection of back-EMF zero-crossing in BLDC motor commutation for electric power steering. IC Role / Device Role / Timing Role: Dual comparator compares phase voltage against mid-rail reference to generate timing edges for gate driver sequencing. Use Value: ±0.37 mV offset and 1 µs propagation delay ensure <1° electrical angle timing error at 10 kHz PWM, improving torque smoothness and efficiency. |
Use Scenario: Monitoring individual Li-ion cell voltages in 48 V mild-hybrid battery packs to trigger overvoltage/undervoltage alerts. IC Role / Device Role / Timing Role: Each comparator independently compares cell voltage against precision reference to assert fault flags to BMS microcontroller. Use Value: 3.5 nA input bias current prevents loading of high-resistance voltage dividers, preserving measurement accuracy across temperature. |
| Infotainment Display Backlight Control | Body Control Module Window Position Sensing |
|
Use Scenario: Adaptive dimming of TFT display backlight based on ambient light sensor output and ignition state. IC Role / Device Role / Timing Role: Comparator detects ambient light level crossing programmable thresholds to enable/disable LED driver IC via open-drain enable line. Use Value: 2 V to 36 V supply range allows direct connection to vehicle battery - eliminating LDO dependency and reducing BOM count. |
Use Scenario: Detecting mechanical end-stops during power window lift/drop using potentiometer wiper voltage. IC Role / Device Role / Timing Role: One comparator monitors wiper voltage against upper/lower thresholds to halt motor drive before mechanical impact. Use Value: Input common-mode range including GND enables direct interface to grounded potentiometer - no level-shifter required. |
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 | Higher ±2 mV max offset voltage, 1 mA total supply current, 1 kV HBM ESD rating | Lacks tri-temp testing and functional safety documentation; suitable for cost-sensitive non-safety-critical body modules | Select when lower ESD robustness and relaxed offset tolerance are acceptable to reduce unit cost. |
| TLV1702QDRQ1 | Rail-to-rail input, 0.35 mV offset, 125 µA IQ, but only 36 V max supply and no AEC-Q100 Grade 1 certification | Not qualified for under-hood use; limited to infotainment or cabin modules with controlled ambient temperature | Choose for higher-precision sensing where Grade 1 qualification is not mandated and supply stays below 36 V. |
Compared with LM2903QPWRQ1, LM2903BRQPWRQ1 offers tighter offset and better ESD for safety-critical powertrain use; compared with TLV1702QDRQ1, it trades some precision for guaranteed automotive temperature compliance and ruggedized input structure.
Availability
LM2903BRQPWRQ1 is available at Aetrix Electronics and suitable for automotive powertrain control, infotainment system monitoring, and body electronics requiring stable component supply across extended lifecycle programs.
Supply support for LM2903BRQPWRQ1 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 developed specifically for AEC-Q100-compliant automotive voltage comparison tasks - emphasizing robustness, wide supply range, and drop-in upgrade paths from legacy industrial comparators.
FAQ
What is the maximum supply voltage rating for LM2903BRQPWRQ1?
The LM2903BRQPWRQ1 supports a maximum supply voltage of 36 V under recommended operating conditions. Absolute maximum ratings allow up to 38 V differential supply (V+ – V−), but sustained operation above 36 V is not advised. This rating enables compatibility with 12 V and 24 V automotive systems, including transient-tolerant designs when paired with appropriate external clamping.
Does LM2903BRQPWRQ1 support dual-supply operation?
Yes, LM2903BRQPWRQ1 supports dual-supply operation provided the difference between V+ and V− remains within 2 V to 36 V, and V+ is at least 1.5 V more positive than the input common-mode voltage. This configuration is commonly used in industrial signal conditioning where bipolar references are required, though most automotive implementations use single-supply mode.
How does the open-drain output of LM2903BRQPWRQ1 interface with a 3.3 V microcontroller?
The LM2903BRQPWRQ1 open-drain output interfaces with a 3.3 V microcontroller by connecting an external pull-up resistor to 3.3 V. When the comparator asserts low, the output sinks current to GND; when inactive, the pull-up defines the logic-high level. This configuration avoids level-shifter ICs and supports mixed-voltage system design - a key advantage confirmed in TI's typical application schematics for MCU wake-up circuits.
Is LM2903BRQPWRQ1 pin-compatible with standard LM2903-Q1 variants?
Yes, LM2903BRQPWRQ1 is pin-compatible with all TSSOP-8 variants of the LM2903-Q1 family, including LM2903QPWRQ1 and LM2903QTPWRQ1. The pinout (1OUT, 1IN−, 1IN+, GND, VCC, 2IN+, 2IN−, 2OUT) matches exactly, enabling drop-in replacement without PCB modification - a feature explicitly stated in TI's family comparison table and supported by identical package dimensions (3.00 mm × 4.40 mm).
What functional safety documentation is available for LM2903BRQPWRQ1?
Texas Instruments provides functional safety documentation for LM2903BRQPWRQ1, including FIT rate data, failure mode analysis, and safety manual excerpts - all accessible via the product folder on ti.com. This documentation supports ISO 26262 ASIL-B system-level development for applications such as battery disconnect monitoring and motor fault detection where LM2903BRQPWRQ1 serves as a diagnostic element.
LM2903BRQPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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-TSSOP
LM2903BRQPWRQ1 FAQ
1.How can I place an order for LM2903BRQPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903BRQPWRQ1 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 LM2903BRQPWRQ1 reliable?
The price and inventory of LM2903BRQPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903BRQPWRQ1 is usually 5 days.
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LM2903BRQPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903BRQPWRQ1 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 LM2903BRQPWRQ1?
For technical support, including LM2903BRQPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903BRQPWRQ1 requirements.
6.How does Aetrix verify that LM2903BRQPWRQ1 is sourced from the original manufacturer or authorized distributors?
All LM2903BRQPWRQ1 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 LM2903BRQPWRQ1 meets industry standards.
7.What is the process for return or replacement of LM2903BRQPWRQ1?
All LM2903BRQPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903BRQPWRQ1, 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 LM2903BRQPWRQ1 part is unused and in its original packaging.
Return procedure for LM2903BRQPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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