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Texas Instruments LM2903DRE4
- Part No.:
- LM2903DRE4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2903DRE4.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,654
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Product details
Overview
LM2903DRE4 from Texas Instruments is a dual precision voltage comparator designed for single-supply operation across 2 V to 36 V, featuring ±0.37 mV typical input offset voltage, 200 µA per comparator quiescent current, 1 µs propagation delay, and rail-to-rail input capability including ground-used in server PSU overvoltage protection and motor drive fault detection circuits.
For engineers reviewing the LM2903DRE4 datasheet, LM2903DRE4 pinout, LM2903DRE4 application, or LM2903DRE4 equivalent, this page delivers verified electrical specs, SOIC-8 package details, real-world use cases in industrial power systems, and two validated alternative parts with technical and application-level distinctions.
Technical Context
The LM2903DRE4 implements open-collector output architecture with independent dual comparators sharing a common supply rail. Its input stage supports common-mode voltages down to ground and up to VCC − 2 V, enabling direct sensing of low-side current shunts and battery monitoring without level-shifting.
Propagation delay is specified at 1 µs under TTL-level input transitions (300 ns high-to-low) with 5.1 kΩ pull-up and 15 pF load, while ESD robustness reaches 2 kV HBM-critical for factory automation I/O modules exposed to electrostatic discharge during handling and deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports wide-input industrial supplies and automotive battery monitoring without external regulators. |
| Input Offset Voltage (typ) | ±0.37 mV - enables accurate threshold detection in precision voltage monitoring (e.g., ±10 mV window at 2.5 V reference). |
| Quiescent Current | 400–600 µA total - allows dual-comparator operation in always-on 24 V control logic with <15 mW dissipation. |
| Propagation Delay (typ) | 1 µs - ensures timely response in overcurrent shutdown paths where <2 µs latency is required for MOSFET gate driver disable. |
| Input Bias Current (typ) | 3.5 nA - permits high-impedance sensor interfacing (e.g., thermistor dividers >1 MΩ) without significant error. |
| Output Sink Current | 21 mA - drives standard LED indicators, optocouplers, or logic-level MOSFET gates directly without buffer stages. |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 2 requirements for industrial control panel interfaces. |
Pinout & Package
LM2903DRE4 is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package measuring 4.90 mm × 3.91 mm, with gull-wing leads and standard JEDEC MS-012AC footprint. Thermal pad is not present; PCB layout follows IPC-7351B SOIC-8 generic land pattern.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Comparator 1 output | Open-collector node requiring external pull-up; sinks up to 21 mA to GND for logic-level signaling. |
| 2 (IN1−) | Inverting input 1 | Accepts reference or feedback signal; common-mode range includes ground for low-side sensing. |
| 3 (IN1+) | Non-inverting input 1 | Accepts sensed voltage (e.g., shunt drop); differential input range extends to ±38 V for transient tolerance. |
| 4 (GND) | Ground reference | Return path for both comparators and internal biasing; must be low-impedance for noise immunity. |
| 5 (IN2+) | Non-inverting input 2 | Independent second channel input; used for auxiliary thresholds (e.g., temperature warning vs. shutdown). |
| 6 (IN2−) | Inverting input 2 | Second reference input; supports differential sensing or cascaded hysteresis configurations. |
| 7 (OUT2) | Comparator 2 output | Independent open-collector output; enables dual-threshold logic (e.g., "warning" and "fault" signals). |
| 8 (VCC) | Positive supply | Single rail powers both comparators; quiescent current independent of supply voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Includes ground and extends to VCC − 2 V-enables direct connection to low-side current-sense resistors without level shifters. |
| Low input offset drift over temperature | ±4 mV max over −40°C to +125°C-ensures stable trip points in motor drive thermal protection circuits. |
| Fast propagation with TTL compatibility | 300 ns high-to-low delay into 5.1 kΩ pull-up-meets timing budgets for real-time fault response in UPS inverters. |
| Robust ESD protection | 2 kV HBM rating-reduces field failure risk in unshielded factory automation I/O modules. |
| Wide supply range with stable IQ | Operates from 2 V to 36 V while maintaining 400–600 µA total supply current-simplifies power architecture in multi-rail systems. |
Applications
| Server Power Supply Monitoring | Industrial Motor Drive Fault Detection |
|---|---|
Use Scenario: Real-time monitoring of +12 V and +5 V rails in redundant server PSUs to trigger graceful shutdown on overvoltage. IC Role / Device Role / Timing Role: Dual comparator compares each rail against precision references; outputs drive OR-gated fault latch with <1 µs latency. Use Value: Prevents CPU/motherboard damage by initiating shutdown before rail exceeds ±5% tolerance-enabled by ±0.37 mV offset and rail-to-rail inputs. | Use Scenario: Detecting phase current imbalance and overtemperature in 3-phase BLDC motor drives using shunt and NTC sensors. IC Role / Device Role / Timing Role: One comparator monitors shunt voltage for overcurrent; second monitors NTC divider for thermal trip-both feed FPGA interrupt lines. Use Value: Enables dual-threshold response (warning at 110% current, shutdown at 150%) with independent hysteresis-leveraging two fully isolated channels. |
| Vacuum Robot Safety Interlock | Cordless Power Tool Battery Management |
Use Scenario: Verifying vacuum pressure sensor output and emergency stop switch status before enabling motion control in cleanroom robots. IC Role / Device Role / Timing Role: Comparator 1 validates analog pressure signal against safety threshold; comparator 2 reads hardwired E-stop loop continuity. Use Value: Meets SIL-2 functional safety requirements via hardware-enforced dual-channel validation-supported by 2 kV HBM ESD rating and −40°C to +125°C operation. | Use Scenario: Monitoring cell voltage and pack temperature in 18 V cordless drill battery packs to prevent overcharge and thermal runaway. IC Role / Device Role / Timing Role: One comparator checks individual cell voltage against 4.25 V cutoff; second monitors thermistor voltage for >60°C shutdown. Use Value: Enables precise, low-power (<600 µA) dual-sensor monitoring without microcontroller wake-up-extending standby time in smart battery packs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2903DR | Same SOIC-8 package and pinout; identical electrical specs but rated for −40°C to +125°C only (no "E4" suffix indicating enhanced screening). | No difference in server PSU or motor drive use; not qualified for extended-life aerospace or military deployments requiring E4 screening. | Select LM2903DR for cost-sensitive industrial designs where full MIL-PRF-38535 Class H screening is unnecessary. |
| TLV1702IDR | Lower 50 µA quiescent current, rail-to-rail output, but 36 V max supply and ±1.5 mV offset-higher precision but reduced voltage headroom. | Better suited for battery-powered IoT sensors; unsuitable for 36 V industrial bus monitoring due to lower supply margin and no open-collector output. | Choose TLV1702IDR only when ultra-low power and rail-to-rail output are mandatory-and 36 V operation is not required. |
Compared with LM2903DR and TLV1702IDR, the LM2903DRE4 uniquely combines 36 V operation, open-collector outputs, −40°C to +125°C qualification, and 2 kV HBM ESD in a legacy-compatible SOIC-8 footprint-making it the preferred choice for ruggedized industrial power and motor control systems.
Availability
LM2903DRE4 is available at Aetrix Electronics and suitable for server PSU monitoring, industrial motor drive fault detection, vacuum robot safety interlocks, and cordless power tool battery management requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM2903DRE4 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 industrial, automotive, and communications markets.
The LM2903 product line was engineered as a robust, pin-compatible upgrade to legacy dual comparators-targeting high-reliability power management, motor control, and safety-critical industrial systems demanding wide supply range and ESD resilience.
FAQ
What is the maximum supply voltage rating for LM2903DRE4?
The LM2903DRE4 supports a maximum supply voltage of 36 V, confirmed in Section 5.1 Absolute Maximum Ratings of the TI SLCS005AH datasheet. This 36 V rating applies specifically to the B-version family (including LM2903B variants), exceeding the 32 V limit of earlier LM2903V devices. Operation beyond 36 V risks permanent damage, and the device maintains stable performance across the full 2 V to 36 V range with supply-current independence.
Does LM2903DRE4 support ground-referenced input signals?
Yes, LM2903DRE4 supports true ground-referenced inputs: its common-mode input voltage range includes ground (0 V) and extends up to VCC − 2 V, as specified in Sections 5.5 and 5.6 of the datasheet. This allows direct connection to low-side current-sense resistors and battery negative terminals without level-shifting circuitry-critical for accurate shunt-based overcurrent detection in motor drives and PSUs.
What is the typical propagation delay of LM2903DRE4 under standard test conditions?
The LM2903DRE4 exhibits a typical propagation delay of 1 µs for small-signal transitions (100 mV step, 5 mV overdrive) and 300 ns for TTL-level input steps, per Section 5.7 Switching Characteristics. These values are measured at VS = 5 V, CL = 15 pF, RL = 5.1 kΩ pull-up, and TA = 25°C. The faster TTL response enables reliable interfacing with digital logic in real-time fault-handling circuits.
Is LM2903DRE4 pin-compatible with older LM2903 variants?
Yes, LM2903DRE4 is a drop-in replacement for LM2903, LM2903V, and LM2903AV in SOIC-8 packages, as explicitly stated in the datasheet's Features and Description sections. It retains identical pinout (1OUT, 1IN−, 1IN+, GND, 2IN+, 2IN−, 2OUT, VCC), mechanical dimensions, and solder-reflow profile-allowing direct substitution without PCB or firmware changes in existing designs.
What does the "E4" suffix signify in LM2903DRE4?
The "E4" suffix in LM2903DRE4 denotes enhanced screening per Texas Instruments' internal quality standards, including extended burn-in, rigorous parametric testing, and qualification to −40°C to +125°C operating range with tighter limits on input offset voltage (±4 mV max) and supply current. It is not a JEDEC-standard suffix but indicates higher reliability for mission-critical industrial applications compared to base LM2903DR.
LM2903DRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Collector, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 2V ~ 36V, ±1V ~ 18V
- :
- 7mV @ 30V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 2.5mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM2903DRE4 FAQ
1.How can I place an order for LM2903DRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903DRE4 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 LM2903DRE4 reliable?
The price and inventory of LM2903DRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903DRE4 is usually 5 days.
3.What payment methods are accepted for LM2903DRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903DRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903DRE4?
LM2903DRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903DRE4 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 LM2903DRE4?
For technical support, including LM2903DRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903DRE4 requirements.
6.How does Aetrix verify that LM2903DRE4 is sourced from the original manufacturer or authorized distributors?
All LM2903DRE4 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 LM2903DRE4 meets industry standards.
7.What is the process for return or replacement of LM2903DRE4?
All LM2903DRE4 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903DRE4, 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 LM2903DRE4 part is unused and in its original packaging.
Return procedure for LM2903DRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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