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Texas Instruments LM2903BTQDRQ1
- Part No.:
- LM2903BTQDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2903BTQDRQ1.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,797
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Product details
Overview
LM2903BTQDRQ1 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 supply, delivers ±0.37 mV typical input offset voltage, 3.5 nA typical input bias current, and 1 µs typical propagation delay. It is used in HEV/EV powertrain monitoring and body control modules where precision, wide supply range, and robustness are critical.
For engineers reviewing the LM2903BTQDRQ1 datasheet, LM2903BTQDRQ1 pinout, LM2903BTQDRQ1 application, or LM2903BTQDRQ1 equivalent, key selection criteria include its Grade 1 temperature rating (–40°C to +125°C), 2 kV HBM ESD rating, open-collector TTL/MOS/CMOS-compatible outputs, and validated functional safety documentation support.
Technical Context
The LM2903BTQDRQ1 implements a PNP Darlington-pair input stage enabling high gain, low input bias current, and common-mode input range extending to ground. Its open-drain NPN output stage supports wired-AND logic and flexible pull-up configuration across voltage domains.
It features dedicated ESD protection on all pins per AEC-Q100, improved negative input voltage handling versus legacy LM2903-Q1, and guaranteed operation over full Grade 1 ambient temperature range with no derating up to 125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports direct connection to 12 V/24 V automotive batteries and wide-input industrial rails without regulation. |
| Input Offset Voltage (typ) | ±0.37 mV - enables accurate threshold detection at sub-millivolt levels in battery monitoring or sensor interface circuits. |
| Input Bias Current (typ) | 3.5 nA - minimizes loading error on high-impedance sources such as thermistors or photodiodes. |
| Propagation Delay (typ) | 1 µs - ensures timely response in overvoltage protection and motor fault detection loops. |
| ESD Rating (HBM) | 2 kV - meets AEC-Q100 Class H1C for reliable operation in assembly and vehicle-level ESD stress environments. |
| Operating Temperature | –40°C to +125°C ambient - certified for under-hood and powertrain applications without thermal derating. |
| Output Type | Open-drain - allows level-shifting, wired-AND logic, and compatibility with 3.3 V, 5 V, or 12 V MCU I/O interfaces. |
Pinout & Package
LM2903BTQDRQ1 is packaged in an 8-pin TSSOP (PW) with nominal body size 3.00 mm × 4.40 mm and exposed thermal pad connected to GND.
| 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 down to –0.3 V and up to VCC − 2 V. |
| 1IN+ | Comparator 1 non-inverting input | Positive input node of first comparator - same voltage range as 1IN−; supports rail-to-rail common-mode operation including ground. |
| GND | Ground reference | Power and signal return path; thermal pad must be soldered directly to PCB GND plane for thermal reliability. |
| 2IN+ | Comparator 2 non-inverting input | Positive input node of second comparator - electrically isolated but shares same supply and GND with comparator 1. |
| 2IN− | Comparator 2 inverting input | Negative input node of second comparator - identical electrical characteristics and voltage range as 1IN−. |
| 2OUT | Comparator 2 output | Open-drain NPN collector - independently controllable; supports parallel connection with 1OUT for AND logic. |
| VCC | Positive supply | Main power rail - supplies both comparators; supports single-supply operation or dual-supply configurations with VCC ≥ VIN-CM + 1.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from –40°C to +125°C ambient, with full production test coverage at temperature extremes. |
| Low input offset voltage | ±0.37 mV typical ensures stable switching thresholds in precision window comparators and battery cell monitoring. |
| Wide supply range | 2 V to 36 V operation eliminates need for intermediate LDOs in 12 V/24 V systems and simplifies power architecture. |
| Open-drain outputs | Enable bidirectional level translation, bus arbitration, and direct interfacing with mixed-voltage microcontrollers and logic families. |
| Functional safety documentation | Includes FIT rate data, failure mode analysis, and diagnostic coverage guidance to accelerate ISO 26262 ASIL-B system certification. |
Applications
| HEV/EV Battery Monitoring | Automotive Body Control Module |
|---|---|
Use Scenario: Detecting overvoltage and undervoltage conditions across individual Li-ion battery cells in series strings. IC Role / Device Role / Timing Role: Dual comparator performing independent high-side and low-side threshold comparisons with fast 1 µs response. Use Value: Enables real-time cell balancing trigger and isolation relay control before thermal runaway occurs. | Use Scenario: Monitoring door lock actuator current to detect jamming or motor stall during power window operation. IC Role / Device Role / Timing Role: Comparator comparing sensed current against programmable reference to assert fault flag within 1 µs. Use Value: Prevents mechanical damage and meets OEM functional safety requirements for occupant protection. |
| Infotainment System Power Sequencing | Engine Control Unit (ECU) Sensor Interface |
Use Scenario: Validating correct power-up sequence of display backlight, audio amplifier, and processor rails before system boot. IC Role / Device Role / Timing Role: Dual comparator verifying each rail reaches its target voltage before enabling next stage via open-drain wired-AND output. Use Value: Eliminates risk of latch-up or undefined state during cold start and ensures deterministic boot behavior. | Use Scenario: Converting analog oxygen sensor (O2) or manifold absolute pressure (MAP) signals into digital enable/disable flags for fuel injection timing. IC Role / Device Role / Timing Role: Precision comparator with ±0.37 mV offset detecting small pressure changes at engine idle or transient load conditions. Use Value: Improves air-fuel ratio accuracy and reduces tailpipe emissions by minimizing threshold drift over temperature. |
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 |
|---|---|---|---|
| LM2903QDRQ1 | Higher ±4 mV max offset voltage, 1 kV HBM ESD, same package and pinout. | Lacks Tri-Temp testing and functional safety documentation; suitable for non-safety-critical body electronics. | Select when cost sensitivity outweighs need for lowest offset or ASIL compliance support. |
| TLV1702QDRQ1 | Rail-to-rail input, 0.9 V to 36 V supply, 350 µs propagation delay, higher quiescent current (120 µA). | Superior input range near VCC, lower power at light loads, but slower response limits use in fast fault detection. | Choose for ultra-low-power always-on monitoring where speed is secondary to supply flexibility and current draw. |
Compared with LM2903QDRQ1, LM2903BTQDRQ1 offers tighter offset and stronger ESD robustness for safety-critical functions; compared with TLV1702QDRQ1, it trades rail-to-rail input capability for faster response and lower IQ in high-voltage automotive subsystems.
Availability
LM2903BTQDRQ1 is available at Aetrix Electronics and suitable for HEV/EV battery management, automotive body control modules, and infotainment power sequencing requiring stable component supply across extended production lifecycles.
Supply support for LM2903BTQDRQ1 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, embedded processing, and connectivity solutions for automotive, industrial, and consumer markets.
The LM2903-Q1 family was developed specifically for automotive-grade voltage comparison tasks demanding AEC-Q100 qualification, wide supply tolerance, and functional safety readiness - targeting powertrain, chassis, and body electronics.
FAQ
What is the maximum supply voltage rating for LM2903BTQDRQ1?
The LM2903BTQDRQ1 supports a maximum supply voltage of 36 V, verified per Absolute Maximum Ratings in the official datasheet. This allows direct integration into 24 V commercial vehicle systems and high-side sensing applications without external voltage clamping or regulation. Operation at 36 V is fully characterized across temperature and load conditions.
Does LM2903BTQDRQ1 support dual-supply operation?
Yes, LM2903BTQDRQ1 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 front-ends while maintaining full functionality and specification compliance.
What is the input common-mode voltage range of LM2903BTQDRQ1?
The input common-mode voltage range of LM2903BTQDRQ1 extends from ground to VCC − 2 V at full temperature range (–40°C to +125°C), and includes ground explicitly. This allows direct interface with 0 V-referenced sensors such as thermistors, potentiometers, and current-sense resistors without level-shifting circuitry.
Is LM2903BTQDRQ1 pin-compatible with standard LM2903-Q1 variants?
Yes, LM2903BTQDRQ1 uses the same 8-pin TSSOP (PW) package and identical pinout as LM2903QDRQ1 and LM2903QDR. No PCB layout changes are required when upgrading from legacy LM2903-Q1 to LM2903BTQDRQ1, enabling drop-in replacement with enhanced performance and qualification.
What functional safety documentation is available for LM2903BTQDRQ1?
Texas Instruments provides functional safety documentation for LM2903BTQDRQ1 including FIT rate data, failure mode effects analysis (FMEA), and diagnostic coverage guidance aligned with ISO 26262 ASIL-B requirements. This documentation is accessible through TI's functional safety resource center and supports systematic hardware development for automotive safety applications.
LM2903BTQDRQ1 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
LM2903BTQDRQ1 FAQ
1.How can I place an order for LM2903BTQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903BTQDRQ1 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 LM2903BTQDRQ1 reliable?
The price and inventory of LM2903BTQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903BTQDRQ1 is usually 5 days.
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4.How is shipping managed for LM2903BTQDRQ1?
LM2903BTQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903BTQDRQ1 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 LM2903BTQDRQ1?
For technical support, including LM2903BTQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903BTQDRQ1 requirements.
6.How does Aetrix verify that LM2903BTQDRQ1 is sourced from the original manufacturer or authorized distributors?
All LM2903BTQDRQ1 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 LM2903BTQDRQ1 meets industry standards.
7.What is the process for return or replacement of LM2903BTQDRQ1?
All LM2903BTQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903BTQDRQ1, 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 LM2903BTQDRQ1 part is unused and in its original packaging.
Return procedure for LM2903BTQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2903BTQDRQ1 Tags
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