My Inquiry
My Account
Texas Instruments LM2903BHQDRQ1
- Part No.:
- LM2903BHQDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2903BHQDRQ1.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,842
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2903BHQDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified dual open-drain 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 300 ns typical propagation delay (high-to-low) at 5 V. It serves in HEV/EV powertrain voltage monitoring and body control module threshold detection.
For engineers reviewing the LM2903BHQDRQ1 datasheet, LM2903BHQDRQ1 pinout, LM2903BHQDRQ1 application, or LM2903BHQDRQ1 equivalent, key selection criteria include its −40°C to +125°C ambient operation, 2 kV HBM ESD rating, open-collector output compatibility with TTL/MOS/CMOS, and guaranteed performance across wide supply and common-mode ranges.
Technical Context
The LM2903BHQDRQ1 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 internal clamping (Q15) ensuring valid output when inputs exceed VCM. Its open-drain NPN output stage sinks up to 25 mA and supports wired-AND logic configurations.
It operates on single or split supplies (VS = V+ − V−) within 2 V to 36 V, requiring VCC ≥ VCM + 1.5 V for proper function. Input differential voltage tolerance extends to ±38 V, and total quiescent current remains stable at 400–600 µA over 5 V to 36 V supply range.
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 3.3 V/5 V logic rails without level shifters |
| Input Offset Voltage (typ) | ±0.37 mV - enables precise threshold detection in battery voltage supervision and motor overcurrent sensing |
| Input Bias Current (typ) | 3.5 nA - minimizes error in high-impedance sensor interfaces (e.g., thermistor or potentiometer-based feedback) |
| Propagation Delay (typ) | 300 ns (high-to-low, TTL input) - suitable for real-time fault response in powertrain safety circuits |
| ESD Rating (HBM) | 2 kV - exceeds AEC-Q100 H1C classification, enhancing robustness in assembly and field environments |
| Output Sink Current | 25 mA - drives standard pull-up resistors and directly interfaces with MCU GPIOs or optocouplers |
| Operating Temperature | −40°C to +125°C ambient - certified for Grade 1 automotive use in engine bay and cabin modules |
Pinout & Package
LM2903BHQDRQ1 is packaged in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, with standard pinout compatible across LM2903-Q1 family variants.
| 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 | High-impedance PNP Darlington base - accepts signals from ground to VCC − 1.5 V |
| 1IN+ | Comparator 1 non-inverting input | High-impedance PNP Darlington base - same voltage range as 1IN−; enables reference comparison |
| GND | Ground reference | Common return for supply and inputs; thermal pad (in DSG variant) must connect to GND |
| VCC | Positive supply | Accepts 2 V to 36 V; powers both comparators and internal bias circuitry |
| 2OUT | Comparator 2 output | Independent open-drain output - supports dual-channel monitoring (e.g., overvoltage + undervoltage) |
| 2IN− | Comparator 2 inverting input | Electrically isolated from 1IN−; enables independent signal comparison |
| 2IN+ | Comparator 2 non-inverting input | Same architecture and voltage range as 1IN+; allows differential or single-ended configurations |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Enables simultaneous monitoring of two distinct thresholds (e.g., battery high/low warning) without cross-talk |
| Open-drain outputs | Allows flexible logic-level translation and wired-AND bus configuration for fault aggregation |
| Wide common-mode input range | Includes ground and extends to VCC − 1.5 V - supports direct sensing of low-side shunt voltages and 3.3 V reference signals |
| Low quiescent current | 400–600 µA total - critical for always-on automotive modules with strict sleep-current budgets |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation with HBM 2 kV / CDM 1 kV - meets functional safety readiness requirements |
Applications
| HEV/EV Battery Supervision | Body Control Module (BCM) |
|---|---|
Use Scenario: Monitoring cell stack voltage against upper/lower thresholds to trigger charge/discharge cutoff or thermal management alerts. IC Role / Device Role / Timing Role: Dual comparator performing independent overvoltage and undervoltage detection with sub-millivolt accuracy. Use Value: Enables compliance with ISO 26262 ASIL-B diagnostic coverage via precise, temperature-stable thresholding without calibration. | Use Scenario: Detecting door-open status via microswitch closure and interior light dimming via PWM feedback loop. IC Role / Device Role / Timing Role: One comparator senses switch state; the other compares PWM duty-cycle feedback to reference for closed-loop brightness control. Use Value: Reduces BOM count by replacing discrete transistor switches and op-amps with a single qualified dual comparator. |
| Infotainment Power Sequencing | Power Train Sensor Interface |
Use Scenario: Validating DC-DC converter outputs before enabling downstream processors and display drivers. IC Role / Device Role / Timing Role: Comparator pair verifies 5 V and 1.8 V rails are within ±3% tolerance prior to release of reset signals. Use Value: Prevents system lockup due to premature processor boot; propagation delay < 1 µs ensures fast power-good assertion. | Use Scenario: Converting analog signals from crankshaft position sensors (VR or Hall-effect) into clean digital edges for ECU timing capture. IC Role / Device Role / Timing Role: High-speed comparator conditioning noisy sensor waveforms with hysteresis-capable inputs. Use Value: Maintains accurate ignition timing across temperature extremes due to low drift (±5 mV max offset over −40°C to +125°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2903QDRQ1 | Higher input offset voltage (±4 mV max), lower ESD rating (1 kV HBM), identical pinout and package | Less suitable for precision voltage monitoring where sub-1 mV accuracy is required | Select when cost sensitivity outweighs need for lowest offset and highest ESD robustness |
| TLV1702QDRQ1 | Rail-to-rail input, 1.8 V to 36 V supply, 350 µs max propagation delay, SOIC-8 pinout | Better for low-voltage systems (e.g., 1.8 V logic domains); not drop-in due to different input stage architecture | Choose for mixed-supply designs needing input common-mode down to V−, but verify layout changes for speed-sensitive paths |
Compared with LM2903QDRQ1, LM2903BHQDRQ1 delivers tighter offset and superior ESD protection without layout change; versus TLV1702QDRQ1, it offers proven AEC-Q100 reliability at higher speed but lacks rail-to-rail input capability.
Availability
LM2903BHQDRQ1 is available at Aetrix Electronics and suitable for automotive HEV/EV battery management, infotainment power sequencing, and body control module designs requiring stable component supply across extended production lifecycles.
Supply support for LM2903BHQDRQ1 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 product line was designed specifically for automotive-grade dual-comparator applications demanding AEC-Q100 qualification, wide temperature operation, and robust EMC/ESD performance in safety-critical subsystems.
FAQ
What is the maximum supply voltage supported by LM2903BHQDRQ1?
The LM2903BHQDRQ1 supports a maximum supply voltage of 36 V, with absolute maximum ratings extending to 38 V for differential input and supply pins. This allows direct integration into 24 V commercial vehicle systems and 12 V passenger car architectures without external regulation, while maintaining full functionality across the −40°C to +125°C ambient range.
Does LM2903BHQDRQ1 support single-supply operation?
Yes, LM2903BHQDRQ1 fully supports single-supply operation from 2 V to 36 V. Its input common-mode range includes ground, and the output stage functions correctly with VCC referenced to GND. This enables use in low-voltage microcontroller interfaces and high-voltage battery monitoring without dual-rail generation.
What is the input offset voltage specification for LM2903BHQDRQ1 over temperature?
The LM2903BHQDRQ1 has a maximum input offset voltage of ±5 mV over the full −40°C to +125°C operating range, with a typical value of ±0.37 mV at 25°C. This tight offset stability ensures consistent threshold accuracy in automotive applications such as coolant temperature window detection and alternator field control.
Can LM2903BHQDRQ1 outputs be wire-OR'd together?
Yes, LM2903BHQDRQ1 features open-drain outputs that can be externally pulled up and connected together to implement wired-AND logic. This is commonly used in automotive fault-bus architectures where multiple comparators (e.g., overtemperature, overvoltage, overcurrent) assert a shared interrupt line to the main controller.
Is LM2903BHQDRQ1 pin-compatible with legacy LM2903-Q1 devices?
Yes, LM2903BHQDRQ1 is pin-compatible and footprint-compatible with LM2903QDRQ1 and LM2903QDR in SOIC-8 packaging. No PCB redesign is required for migration; benefits include improved offset, lower bias current, and enhanced 2 kV HBM ESD protection while retaining identical electrical interface behavior.
LM2903BHQDRQ1 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
LM2903BHQDRQ1 FAQ
1.How can I place an order for LM2903BHQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903BHQDRQ1 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 LM2903BHQDRQ1 reliable?
The price and inventory of LM2903BHQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903BHQDRQ1 is usually 5 days.
3.What payment methods are accepted for LM2903BHQDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903BHQDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903BHQDRQ1?
LM2903BHQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903BHQDRQ1 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 LM2903BHQDRQ1?
For technical support, including LM2903BHQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903BHQDRQ1 requirements.
6.How does Aetrix verify that LM2903BHQDRQ1 is sourced from the original manufacturer or authorized distributors?
All LM2903BHQDRQ1 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 LM2903BHQDRQ1 meets industry standards.
7.What is the process for return or replacement of LM2903BHQDRQ1?
All LM2903BHQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903BHQDRQ1, 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 LM2903BHQDRQ1 part is unused and in its original packaging.
Return procedure for LM2903BHQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2903BHQDRQ1 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…
