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Texas Instruments LM2903BTQPWRQ1
- Part No.:
- LM2903BTQPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2903BTQPWRQ1.pdf
- Description:
- IC COMPARATOR 2 DIFF 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,962
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Product details
Overview
LM2903BTQPWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified dual open-drain voltage 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 LM2903BTQPWRQ1 datasheet, LM2903BTQPWRQ1 pinout, LM2903BTQPWRQ1 application, or LM2903BTQPWRQ1 equivalent, key selection criteria include its automotive-grade temperature range (–40°C to +125°C), low quiescent current (600 µA max at 36 V), open-drain output compatibility with TTL/MOS/CMOS, and differential input voltage tolerance up to ±38 V.
Technical Context
The LM2903BTQPWRQ1 implements a PNP Darlington-pair input stage enabling high gain and sub-4 nA input bias current while supporting common-mode input down to ground and up to VCC – 2 V over temperature. Its open-drain NPN output stage allows flexible pull-up configuration and wired-AND logic implementation.
It operates across single or dual supplies (VS = V+ – V–) within 2 V to 36 V, with guaranteed functionality at –40°C to +125°C ambient, and features integrated ESD protection rated at 2 kV HBM and 1 kV CDM per AEC-Q100.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports wide-input automotive battery and load-dump tolerant designs without external regulation |
| Input Offset Voltage (max) | ±4 mV over –40°C to +125°C - ensures reliable threshold detection in safety-critical voltage monitoring |
| Input Bias Current (typ) | 3.5 nA - minimizes loading on high-impedance sensor references and divider networks |
| Propagation Delay (typ) | 1 µs at 5 V with 100 mV overdrive - enables fast response in overvoltage/undervoltage fault detection |
| Output Type | Open-drain NPN - permits level-shifting, wired-AND logic, and interface to diverse logic families (TTL/MOS/CMOS) |
| Differential Input Range | ±38 V - withstands transient surges and allows direct connection to unregulated bus voltages |
| Quiescent Current (max) | 800 µA at 36 V and full temperature range - supports always-on subsystems with low standby power |
Pinout & Package
Packaged in TSSOP-8 (3.00 mm × 4.40 mm), the LM2903BTQPWRQ1 uses a standard 8-pin layout with exposed thermal pad connected to GND for enhanced thermal performance in automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-drain NPN collector - requires external pull-up; sinks current when IN+ < IN− + VOS |
| 1IN− | Comparator 1 inverting input | Negative input node of first comparator - accepts signals from ground to VCC − 2 V |
| 1IN+ | Comparator 1 non-inverting input | Positive input node of first comparator - same common-mode range as 1IN− |
| GND | Ground reference | Power and signal return; thermal pad must be soldered directly to PCB GND plane |
| 2IN+ | Comparator 2 non-inverting input | Positive input node of second comparator - electrically isolated from first comparator |
| 2IN− | Comparator 2 inverting input | Negative input node of second comparator - supports identical voltage ranges as 1IN− |
| 2OUT | Comparator 2 output | Independent open-drain output - enables dual-threshold or redundant sensing architectures |
| VCC | Positive supply | Main power rail - supplies both comparators; no separate V− required for single-supply operation |
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 |
| 2 kV HBM ESD rating | Enhanced robustness against handling and assembly electrostatic discharge versus legacy LM2903-Q1 |
| Open-drain outputs | Enables flexible logic-level translation and multi-comparator wired-AND configurations |
| Input common-mode range includes ground | Supports direct sensing of 0 V referenced signals (e.g., battery ground-side current sense) |
| Low input offset drift | ±0.37 mV typical at 25°C, ±4 mV max over full temperature range - improves accuracy in precision thresholding |
Applications
| HEV/EV Battery Supervision | Body Control Module (BCM) Voltage Monitoring |
|---|---|
Use Scenario: Real-time monitoring of 12 V auxiliary battery voltage during start-stop cycles and load-dump events. IC Role / Device Role / Timing Role: Dual comparator performs high/low threshold detection (e.g., 11.5 V undervolt, 14.8 V overvolt) with independent open-drain outputs feeding MCU GPIOs. Use Value: Enables fail-safe shutdown and warning activation using only one IC, reducing BOM count and PCB area in space-constrained modules. | Use Scenario: Supervising regulated 5 V and 3.3 V rails powering door lock actuators, window lift controllers, and lighting drivers. IC Role / Device Role / Timing Role: One comparator monitors 5 V rail against 4.75 V reference; the other checks 3.3 V rail against 3.15 V reference - both outputs pulled up to respective logic domains. Use Value: Eliminates need for discrete voltage supervisors or microcontroller ADC polling, lowering system latency and firmware overhead. |
| Infotainment Display Backlight Control | Automotive HVAC Fan Speed Feedback |
Use Scenario: Comparing PWM-derived analog backlight dimming voltage against programmable thresholds to enable/disabled LED driver stages. IC Role / Device Role / Timing Role: Comparator 1 triggers backlight ON/OFF; Comparator 2 provides hysteresis-based flicker suppression by comparing against offset-adjusted reference. Use Value: Achieves smooth, jitter-free brightness transitions without MCU intervention or additional op-amp circuitry. | Use Scenario: Converting tachometer pulses from HVAC blower motor into digital speed feedback for closed-loop fan control. IC Role / Device Role / Timing Role: Comparator converts noisy analog tach signal into clean square wave; open-drain output interfaces directly to MCU timer capture input with 5 V pull-up. Use Value: Tolerates wide common-mode noise on motor harnesses and eliminates need for Schmitt-trigger buffers or optocouplers. |
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 input offset voltage (±15 mV max), lower ESD rating (1 kV HBM), same package and pinout | Acceptable for non-safety-critical, cost-sensitive BCM functions where tighter threshold accuracy is not required | Select when functional safety documentation and ±4 mV offset spec are not mandated |
| TLV1702QDRQ1 | Rail-to-rail input, 36 V supply, but CMOS output (push-pull), higher quiescent current (120 µA typ), smaller SOT-23-8 package | Better for low-voltage sensor interfacing (e.g., <1 V references); unsuitable for wired-AND or level-shifting due to push-pull output | Choose when rail-to-rail input common-mode and faster response (<400 ns) outweigh open-drain flexibility |
Compared with LM2903QPWRQ1, the LM2903BTQPWRQ1 delivers tighter offset and superior ESD robustness for ASIL-B-relevant monitoring; versus TLV1702QDRQ1, it trades push-pull speed for open-drain versatility in multi-voltage domain interfacing.
Availability
LM2903BTQPWRQ1 is available at Aetrix Electronics and suitable for automotive HEV/EV battery management, body control module voltage supervision, and infotainment display backlight control requiring stable component supply across extended production lifecycles.
Supply support for LM2903BTQPWRQ1 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 designed specifically for automotive applications demanding AEC-Q100 qualification, wide temperature operation, and robust electrical performance in harsh electrical environments.
FAQ
What is the maximum supply voltage rating for the LM2903BTQPWRQ1?
The LM2903BTQPWRQ1 supports a maximum supply voltage of 36 V, with absolute maximum ratings extending to 38 V for differential input voltage (±38 V) and 38 V for supply pins. This enables direct connection to 24 V and 36 V automotive battery systems without external regulators or clamping diodes, provided recommended operating conditions (2 V to 36 V) are maintained for reliable functionality.
Does the LM2903BTQPWRQ1 support single-supply operation?
Yes, the LM2903BTQPWRQ1 fully supports single-supply operation from 2 V to 36 V. Its input common-mode voltage range includes ground (0 V) and extends up to VCC − 2 V over temperature, and its open-drain outputs function correctly with a single positive rail and external pull-up. No negative supply is required, simplifying power architecture in automotive modules like door ECUs and lighting controllers.
How does the open-drain output of the LM2903BTQPWRQ1 benefit automotive system design?
The open-drain output of the LM2903BTQPWRQ1 enables level-shifting between disparate logic domains (e.g., 3.3 V MCU GPIO and 12 V CAN transceiver reset lines), wired-AND fault aggregation (multiple comparators driving one interrupt line), and direct interface to legacy TTL loads. In automotive applications, this eliminates level translators and reduces component count in body control modules and powertrain gate drivers where mixed-voltage signaling is common.
Is the LM2903BTQPWRQ1 pin-compatible with earlier LM2903-Q1 variants?
Yes, the LM2903BTQPWRQ1 is pin-compatible with LM2903QPWRQ1 and LM2903E-Q1 in the same TSSOP-8 package. All share identical pin numbering, footprint, and basic electrical interface. However, the "B" version offers improved specifications - including ±0.37 mV typical offset voltage, 3.5 nA input bias current, and 2 kV HBM ESD - making it a drop-in performance upgrade for existing designs targeting higher accuracy or robustness.
What functional safety documentation is available for the LM2903BTQPWRQ1?
Texas Instruments provides functional safety documentation for the LM2903BTQPWRQ1, including failure mode effect analysis (FMEA), diagnostic coverage reports, and FIT rate data aligned with ISO 26262 ASIL-B requirements. These materials support safety case development for automotive applications such as battery disconnect monitoring and HVAC motor stall detection, and are accessible via TI's product folder and functional safety resource center.
LM2903BTQPWRQ1 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
LM2903BTQPWRQ1 FAQ
1.How can I place an order for LM2903BTQPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903BTQPWRQ1 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 LM2903BTQPWRQ1 reliable?
The price and inventory of LM2903BTQPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903BTQPWRQ1 is usually 5 days.
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LM2903BTQPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903BTQPWRQ1 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 LM2903BTQPWRQ1?
For technical support, including LM2903BTQPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903BTQPWRQ1 requirements.
6.How does Aetrix verify that LM2903BTQPWRQ1 is sourced from the original manufacturer or authorized distributors?
All LM2903BTQPWRQ1 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 LM2903BTQPWRQ1 meets industry standards.
7.What is the process for return or replacement of LM2903BTQPWRQ1?
All LM2903BTQPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903BTQPWRQ1, 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 LM2903BTQPWRQ1 part is unused and in its original packaging.
Return procedure for LM2903BTQPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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