My Inquiry
My Account
Texas Instruments LM2903BQDRQ1
- Part No.:
- LM2903BQDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2903BQDRQ1.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,603
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2903BQDRQ1 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, 3.5 nA typical input bias current, 200 µA typical supply current per comparator, and operation from 2 V to 36 V single or dual supplies. It serves in HEV/EV powertrain monitoring and body control modules where precision, low power, and high-voltage robustness are critical.
For engineers reviewing the LM2903BQDRQ1 datasheet, LM2903BQDRQ1 pinout, LM2903BQDRQ1 application, or LM2903BQDRQ1 equivalent, key selection criteria include its automotive-grade temperature range (–40°C to +125°C), improved 2 kV HBM ESD rating, open-collector output compatibility with TTL/MOS/CMOS, and validated performance across wide supply and common-mode voltage ranges.
Technical Context
The LM2903BQDRQ1 implements a PNP Darlington-pair input stage enabling ultra-low input bias current and high DC gain, while supporting common-mode input voltages down to ground and up to VCC – 2 V over temperature. Its open-drain NPN output stage allows flexible logic-level translation via external pull-up resistors.
It operates with differential input voltage tolerance of ±38 V and supports rail-to-rail input operation within specified common-mode limits. The device is functionally safe-capable, with documentation available to support ISO 26262-compliant system design in ASIL-B/C applications.
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 compatibility with 3.3 V/5 V logic domains |
| Input Offset Voltage (typ) | ±0.37 mV - ensures accurate threshold detection in battery voltage monitoring and fault-sensing circuits |
| Input Bias Current (typ) | 3.5 nA - minimizes loading on high-impedance sensor sources such as thermistors or potentiometers |
| Quiescent Current (per comp) | 200 µA - supports always-on vehicle subsystems with strict power budget constraints |
| Propagation Delay (typ) | 300 ns (TTL input) - provides fast response for overvoltage/undervoltage protection in real-time power management |
| ESD Rating (HBM) | ±2 kV - exceeds AEC-Q100 H1C requirement, enhancing reliability in manufacturing and field environments |
| Operating Temperature | –40°C to +125°C - certified for under-hood and cabin-mounted automotive ECUs without derating |
Pinout & Package
LM2903BQDRQ1 is packaged in an SOIC-8 (D) package measuring 4.90 mm × 3.91 mm with standard lead pitch. Pin functions are electrically identical across all LM2903B-Q1 variants regardless of package type.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-drain NPN collector - requires external pull-up to define logic-high level and sink current when active |
| 1IN− | Comparator 1 inverting input | High-impedance PNP Darlington base - accepts signals down to GND and up to VCC − 2 V |
| 1IN+ | Comparator 1 non-inverting input | High-impedance PNP Darlington base - supports same voltage range as 1IN−; used for reference or signal input |
| GND | Ground reference | Common return path for supply, inputs, and output pull-up - must be low-impedance for noise immunity |
| VCC | Positive supply | Single-supply rail (2–36 V) or positive rail in dual-supply configuration - powers internal bias and output stage |
| 2OUT | Comparator 2 output | Independent open-drain NPN collector - enables dual-threshold detection or OR/AND wired logic |
| 2IN− | Comparator 2 inverting input | Electrically isolated from Comparator 1 - allows independent signal comparison without crosstalk |
| 2IN+ | Comparator 2 non-inverting input | Matches 1IN+ functionality - supports differential sensing or redundant monitoring configurations |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Two fully isolated channels in one SOIC-8 package - reduces board space and BOM count versus discrete solutions |
| Open-drain outputs | Enable wired-AND logic, level shifting between 3.3 V MCU and 12 V sensors, and flexible pull-up voltage selection |
| Wide common-mode input range | Includes ground and extends to VCC − 2 V - supports direct sensing of battery voltage, motor phase, or thermistor dividers |
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C) and functional safety documentation - meets OEM requirements for production ECUs |
| Low input offset drift | ±4 mV max over full temperature range - maintains accuracy in engine bay thermal cycling without calibration |
Applications
| HEV/EV Battery Monitoring | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time detection of cell overvoltage, undervoltage, and pack imbalance in 400 V traction battery systems. IC Role / Device Role / Timing Role: Dual comparator performs independent high-side and low-side threshold comparisons on voltage divider outputs. Use Value: ±0.37 mV offset and 300 ns propagation delay enable sub-10 mV detection resolution and fast fault isolation before thermal runaway. | Use Scenario: Window lift anti-pinch detection using motor current sensing and position feedback. IC Role / Device Role / Timing Role: One comparator monitors amplified current sense signal against programmable threshold; second validates encoder zero-crossing. Use Value: 200 µA/quiescent current supports always-on monitoring; open-drain outputs interface directly with 5 V microcontroller GPIOs. |
| Infotainment Power Sequencing | Power Train Control Unit (PCU) |
Use Scenario: Controlled startup/shutdown sequencing of display backlight, audio amplifier, and processor rails. IC Role / Device Role / Timing Role: Dual comparators monitor DC-DC converter outputs to generate enable/disable strobes for downstream regulators. Use Value: 2 V to 36 V supply range accommodates 12 V vehicle bus input and 3.3 V logic supply simultaneously without level shifters. | Use Scenario: Overtemperature protection for IGBT gate drivers in inverter modules. IC Role / Device Role / Timing Role: Compares thermistor voltage against two thresholds to trigger soft shutdown and hard cutoff. Use Value: ±2 kV HBM ESD rating ensures robustness during assembly and service; –40°C to +125°C operation covers full inverter thermal envelope. |
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 input offset voltage (±15 mV max), higher supply current (1 mA typ), lower ESD rating (1 kV HBM) | Suitable for cost-sensitive non-critical functions where tighter offset and lower power are not required | Select LM2903QDRQ1 only if legacy design reuse or BOM simplification outweighs performance trade-offs |
| TLV1702QDRQ1 | Rail-to-rail input, 36 V supply, but CMOS output (push-pull), 1.2 µs propagation delay, higher quiescent current (120 µA per comp) | Better for low-voltage sensor interfaces (< 2 V) and applications requiring active-high outputs without pull-ups | Choose TLV1702QDRQ1 when rail-to-rail input common-mode or push-pull drive is mandatory |
Compared with LM2903QDRQ1, LM2903BQDRQ1 delivers 4× lower offset and 5× better ESD robustness at identical footprint; versus TLV1702QDRQ1, it offers faster response and lower power but requires external pull-ups and lacks rail-to-rail input capability.
Availability
LM2903BQDRQ1 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 LM2903BQDRQ1 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 LM2903B-Q1 product line was engineered specifically for automotive-grade dual-comparator applications demanding high reliability, wide supply range, and AEC-Q100 compliance - targeting powertrain, chassis, and body electronics.
FAQ
What is the maximum supply voltage rating for LM2903BQDRQ1?
The LM2903BQDRQ1 supports a maximum supply voltage of 36 V, with absolute maximum ratings specifying ±38 V differential input voltage and input pins rated from –0.3 V to 38 V. This allows direct connection to 24 V truck systems and 48 V mild-hybrid architectures without external attenuation. The LM2903BQDRQ1 maintains full functionality across its entire 2 V to 36 V operating range.
Does LM2903BQDRQ1 support dual-supply operation?
Yes, LM2903BQDRQ1 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 configuration enables true bipolar input sensing in automotive sensor signal conditioning, such as crankshaft position decoding with AC-coupled magneto-resistive sensors. The LM2903BQDRQ1's input stage remains functional even when inputs exceed V+.
How does the open-drain output of LM2903BQDRQ1 interface with a 3.3 V microcontroller?
The LM2903BQDRQ1 open-drain output interfaces with a 3.3 V microcontroller by connecting an external pull-up resistor (e.g., 10 kΩ) from the output pin to the 3.3 V supply. When the comparator asserts, the NPN sinks current and pulls the node to < 400 mV (at 4 mA), registering as logic low; when inactive, the pull-up defines a clean 3.3 V logic high. This eliminates level-shifter ICs and ensures noise-immune signaling in LM2903BQDRQ1-based designs.
Is LM2903BQDRQ1 pin-compatible with legacy LM2903-Q1 devices?
Yes, LM2903BQDRQ1 is pin-compatible with LM2903QDRQ1 and other LM2903-Q1 family members in the same SOIC-8 (D) package. All electrical pin functions - including 1OUT, 1IN−, 1IN+, GND, VCC, 2OUT, 2IN−, and 2IN+ - match identically. No PCB layout changes are required when upgrading from LM2903QDRQ1 to LM2903BQDRQ1, enabling drop-in performance enhancement in existing automotive designs.
What automotive temperature grade does LM2903BQDRQ1 meet?
LM2903BQDRQ1 is qualified to AEC-Q100 Grade 1, supporting continuous operation from –40°C to +125°C ambient temperature. This certification covers under-hood applications such as engine control units and transmission control modules. The LM2903BQDRQ1's electrical parameters - including input offset, propagation delay, and supply current - are guaranteed across this full range per TI's characterization data.
LM2903BQDRQ1 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 (±):
- 3V ~ 36V, ±1.5V ~ 18V
- :
- 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
- Operating Temperature:
- Automotive
- Grade:
- AEC-Q100
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM2903BQDRQ1 FAQ
1.How can I place an order for LM2903BQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903BQDRQ1 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 LM2903BQDRQ1 reliable?
The price and inventory of LM2903BQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903BQDRQ1 is usually 5 days.
3.What payment methods are accepted for LM2903BQDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903BQDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903BQDRQ1?
LM2903BQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903BQDRQ1 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 LM2903BQDRQ1?
For technical support, including LM2903BQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903BQDRQ1 requirements.
6.How does Aetrix verify that LM2903BQDRQ1 is sourced from the original manufacturer or authorized distributors?
All LM2903BQDRQ1 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 LM2903BQDRQ1 meets industry standards.
7.What is the process for return or replacement of LM2903BQDRQ1?
All LM2903BQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903BQDRQ1, 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 LM2903BQDRQ1 part is unused and in its original packaging.
Return procedure for LM2903BQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2903BQDRQ1 Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
