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Texas Instruments LM2903BQDDFRQ1
- Part No.:
- LM2903BQDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LM2903BQDDFRQ1.pdf
- Description:
- IC COMPARATOR 2 DIFF TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:13,273
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Product details
Overview
LM2903BQDDFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified dual open-drain voltage comparator for automotive systems, featuring ±0.37 mV typical input offset voltage, 200 µA typical supply current per comparator, and operation across 2 V to 36 V single or dual supplies. It enables precise threshold detection in battery monitoring and motor control circuits within HEV/EV powertrain modules.
For engineers reviewing the LM2903BQDDFRQ1 datasheet, LM2903BQDDFRQ1 pinout, LM2903BQDDFRQ1 application, or LM2903BQDDFRQ1 equivalent, this page delivers verified electrical specs, automotive-grade thermal and ESD performance (2 kV HBM), package-specific pin functions, and real-world use cases in infotainment, body control, and functional safety–capable designs.
Technical Context
The LM2903BQDDFRQ1 implements a PNP Darlington-pair input stage enabling ultra-low input bias current (3.5 nA typ) and wide common-mode range (to ground and up to VCC − 2 V). Its open-drain NPN output supports wired-AND logic and level-shifting across disparate supply domains.
Designed for automotive reliability, it integrates enhanced ESD protection (2 kV HBM / 1 kV CDM), operates over −40°C to +125°C ambient, and features propagation delay as low as 300 ns (high-to-low, TTL input) with 1 µs typical response under small-signal overdrive.
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 DC-DC rails without regulation. |
| Input Offset Voltage (typ) | ±0.37 mV - enables accurate voltage window detection at sub-millivolt thresholds, critical for battery cell balancing and sensor signal conditioning. |
| Supply Current (per comparator) | 200 µA typical at 5 V - reduces system-level quiescent power, essential for always-on vehicle modules meeting ISO 16750-2 sleep current requirements. |
| Input Bias Current (typ) | 3.5 nA - minimizes loading on high-impedance sources such as thermistor networks or capacitive sensors. |
| Propagation Delay (TTL input) | 300 ns high-to-low - ensures timely fault response in motor phase monitoring and overvoltage shutdown circuits. |
| ESD Rating (HBM) | 2 kV - exceeds AEC-Q100 H1C classification, improving robustness against assembly and field handling discharge events. |
| Common-Mode Input Range | Includes ground to (VCC − 2 V) - allows direct sensing of signals referenced to chassis ground in 12 V systems without level shifting. |
Pinout & Package
LM2903BQDDFRQ1 is packaged in an 8-pin SOIC (DDF) with 4.90 mm × 3.91 mm body size and standard JEDEC MS-012AC footprint. Thermal pad is not present; no GND tie required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-drain NPN collector - requires external pull-up to define logic-high level; enables wired-AND and multi-source interrupt sharing. |
| 1IN− | Comparator 1 inverting input | Negative input node of first comparator - accepts signals down to −0.3 V, supporting rail-to-rail input below ground during transients. |
| 1IN+ | Comparator 1 non-inverting input | Positive input node of first comparator - can exceed VCC by up to 36 V without damage, enabling high-side sensing. |
| GND | Ground reference | Primary return path for supply and inputs - connects to chassis or system ground; common reference for both comparators. |
| 2IN+ | Comparator 2 non-inverting input | Positive input node of second comparator - electrically isolated from 1IN+; supports independent dual-threshold detection. |
| 2IN− | Comparator 2 inverting input | Negative input node of second comparator - shares same ESD and input voltage specs as 1IN−. |
| 2OUT | Comparator 2 output | Independent open-drain output - may be pulled to different voltage domains than 1OUT for mixed-voltage interface applications. |
| VCC | Positive supply | Main power pin - supplies both comparators; supports operation with VCC − VGND = 2 V to 36 V, including reverse-battery tolerant configurations when used with external protection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation with full characterization - eliminates need for derating in engine bay and powertrain ECUs. |
| Low input offset voltage (±0.37 mV typ) | Reduces false triggering in precision voltage monitoring, e.g., detecting <10 mV battery cell imbalance in BMS front-end stages. |
| 2 kV HBM ESD rating | Enables direct integration into unshielded harness interfaces and PCB edge connectors without additional TVS protection in most automotive sub-systems. |
| Open-drain outputs with 25 mA sink capability | Supports direct drive of LEDs, optocouplers, or MCU GPIOs across 1.8 V to 24 V logic domains using appropriate pull-up resistors. |
| Differential input voltage range ±38 V | Allows safe comparison of signals with large common-mode offsets - ideal for detecting overvoltage on 48 V mild-hybrid bus lines relative to 12 V reference. |
Applications
| Body Control Module (BCM) | Infotainment System Power Sequencing |
|---|---|
|
Use Scenario: Monitoring door lock actuator current and detecting jam conditions via voltage drop across sense resistor. IC Role / Device Role / Timing Role: Dual comparator performs window-compare on sensed voltage to distinguish normal operation (within ±50 mV), overload (high), and open-circuit (low). Use Value: Enables fail-safe lock/unlock behavior without microcontroller intervention; leverages open-drain outputs to directly assert hardware reset lines on motor driver ICs. |
Use Scenario: Controlling power-up sequence of display, audio processor, and touch controller ICs based on individual rail readiness flags. IC Role / Device Role / Timing Role: Each comparator monitors a different LDO output (e.g., 3.3 V, 1.8 V, 1.1 V); outputs wired-AND to generate global "all-rails-ready" signal. Use Value: Eliminates need for dedicated power sequencer IC; ensures strict monotonic ramping and prevents latch-up in downstream SoCs. |
| HEV/EV Battery Management Front-End | Automotive HVAC Blower Motor Control |
|
Use Scenario: Detecting cell overvoltage and undervoltage thresholds in real time across 96-cell series string using isolated voltage dividers. IC Role / Device Role / Timing Role: One comparator per cell pair compares divided voltage against precision reference; outputs feed FPGA or safety MCU for ASIL-B diagnostics. Use Value: Achieves <±2 mV total error budget over temperature - meets ISO 26262 diagnostic coverage requirements for cell voltage monitoring. |
Use Scenario: Monitoring hall-effect sensor outputs to detect rotor stall or commutation failure in 3-phase BLDC blower motors. IC Role / Device Role / Timing Role: Compares two adjacent hall signals to generate edge-triggered timing windows; output pulses feed timer capture input for RPM and fault detection. Use Value: Provides <1 µs timing resolution for stall detection at 20,000 RPM - enables immediate PWM disable before thermal runaway occurs. |
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 | Same AEC-Q100 Grade 1 spec, but "A"-grade offset (±4 mV max) and higher 1 mA typical supply current. | Lacks Tri-Temp testing and improved ESD; suitable for cost-sensitive non-safety-critical modules like interior lighting. | Select when lower offset and ESD margin are not required, and BOM cost reduction is prioritized over long-term parametric stability. |
| TLV1702QDRQ1 | Rail-to-rail input, 36 V supply, but CMOS output (push-pull), 1.2 µs propagation delay, and 125 µA supply current. | Not open-drain - cannot perform wired-AND; better for driving high-impedance ADC references than interrupt lines. | Choose when push-pull output simplifies layout and faster settling (not raw speed) matters more than multi-source interrupt arbitration. |
Compared with LM2903QPWRQ1 and TLV1702QDRQ1, the LM2903BQDDFRQ1 uniquely balances automotive-grade robustness, ultra-low offset, open-drain flexibility, and proven field reliability - making it optimal for ASIL-B–aligned voltage monitoring where deterministic fault response is mandatory.
Availability
LM2903BQDDFRQ1 is available at Aetrix Electronics and suitable for automotive powertrain control, infotainment system sequencing, and body electronics requiring stable component supply across extended production lifecycles (15+ years).
Supply support for LM2903BQDDFRQ1 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, embedded processing, and automotive ICs, with decades of AEC-Q100 qualification expertise and functional safety documentation support.
The LM2903-Q1 family was designed specifically for automotive voltage comparison tasks demanding wide supply range, ground-sensing capability, and robustness in harsh environments - targeting HEV/EV, chassis, and cockpit electronics.
FAQ
What is the maximum supply voltage for LM2903BQDDFRQ1?
The LM2903BQDDFRQ1 supports a maximum supply voltage of 36 V between VCC and GND. Absolute maximum ratings specify −0.3 V to +38 V differential at any pin, including inputs, enabling safe operation with transient spikes beyond nominal battery rails in 12 V and 24 V automotive systems.
Does LM2903BQDDFRQ1 support dual-supply operation?
Yes, LM2903BQDDFRQ1 supports dual-supply operation provided the difference between V+ and V− is within 2 V to 36 V, and V+ is at least 1.5 V more positive than the input common-mode voltage. This allows use in split-rail sensor interfaces or legacy industrial designs with ±15 V supplies.
Is LM2903BQDDFRQ1 pin-compatible with standard LM2903-Q1 variants?
Yes, LM2903BQDDFRQ1 uses the same SOIC-8 (DDF) pinout as LM2903QPWRQ1 and LM2903QDRQ1. All share identical pin numbering, function mapping, and footprint - enabling drop-in replacement without PCB changes when upgrading to the "B" version's improved offset and ESD performance.
What is the operating temperature range for LM2903BQDDFRQ1?
The LM2903BQDDFRQ1 is qualified for AEC-Q100 Grade 1, with guaranteed operation from −40°C to +125°C ambient temperature. This range covers under-hood and cabin-mounted automotive applications, including engine control units and HVAC controllers exposed to thermal cycling.
Can LM2903BQDDFRQ1 drive TTL, MOS, and CMOS logic directly?
LM2903BQDDFRQ1 outputs are open-drain and require external pull-up resistors to interface with TTL, MOS, or CMOS logic. With appropriate pull-up (e.g., 10 kΩ to 3.3 V), it reliably drives all three families - confirmed in TI's datasheet Section 7.3 and validated in automotive reference designs like TIDA-01388.
LM2903BQDDFRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- 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):
- 1µs (Typ)
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C (TA)
- Operating Temperature:
- Automotive
- Grade:
- AEC-Q100
- Qualification:
- Surface Mount
- :
- TSOT-23-8
LM2903BQDDFRQ1 FAQ
1.How can I place an order for LM2903BQDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903BQDDFRQ1 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 LM2903BQDDFRQ1 reliable?
The price and inventory of LM2903BQDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903BQDDFRQ1 is usually 5 days.
3.What payment methods are accepted for LM2903BQDDFRQ1?
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4.How is shipping managed for LM2903BQDDFRQ1?
LM2903BQDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903BQDDFRQ1 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 LM2903BQDDFRQ1?
For technical support, including LM2903BQDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903BQDDFRQ1 requirements.
6.How does Aetrix verify that LM2903BQDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All LM2903BQDDFRQ1 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 LM2903BQDDFRQ1 meets industry standards.
7.What is the process for return or replacement of LM2903BQDDFRQ1?
All LM2903BQDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903BQDDFRQ1, 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 LM2903BQDDFRQ1 part is unused and in its original packaging.
Return procedure for LM2903BQDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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