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Texas Instruments LM2903DE4
- Part No.:
- LM2903DE4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2903DE4.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,090
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Product details
Overview
LM2903DE4 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, 3.5 nA typical input bias current, 200 µA per comparator quiescent current, and 1 µs propagation delay. It operates over –40°C to +125°C and is widely used in motor drive feedback, server PSU overvoltage protection, and industrial sensor threshold detection.
For engineers reviewing the LM2903DE4 datasheet, LM2903DE4 pinout, LM2903DE4 application, or LM2903DE4 equivalent, this page delivers verified electrical specs, SOIC-8 package details, real-world use cases, and two validated alternative parts with documented functional and thermal differences.
Technical Context
The LM2903DE4 implements open-collector output architecture with rail-to-rail common-mode input range extending to ground, enabling direct interfacing with sensors and logic families. Its internal ESD clamps provide 2 kV HBM robustness without external protection.
Designed as a B-version upgrade of the legacy LM2903, it maintains full pin compatibility while improving offset voltage (±4 mV max vs. ±15 mV), supply current (600 µA typ vs. 1 mA), and response time (1 µs vs. 1.3 µs) - all validated across its full operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports wide-input industrial and automotive power rails without external regulation |
| Input Offset Voltage (max) | ±4 mV over –40°C to +125°C - enables accurate threshold detection in temperature-varying environments |
| Input Bias Current (typ) | 3.5 nA - minimizes loading on high-impedance sensor sources like thermistors or photodiodes |
| Quiescent Current (per comparator) | 200 µA - allows low-power battery-backed monitoring circuits with dual-comparator functionality |
| Propagation Delay | 1 µs at 5 V supply - sufficient for fast overcurrent trip in motor control and DC-DC converter protection |
| Output Sink Current | 21 mA - drives standard LED indicators, optocouplers, or TTL/CMOS inputs directly without buffer stages |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 2 requirements for board-level robustness |
Pinout & Package
LM2903DE4 is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) with 4.90 mm × 3.91 mm body size and standard 1.27 mm pitch. The package is lead-free, RoHS-compliant, and rated for surface-mount reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 Output | Open-collector output requiring external pull-up; sinks up to 21 mA for direct logic-level interfacing |
| 1IN− | Comparator 1 Inverting Input | Negative input terminal; accepts voltages from GND to VCC − 2 V |
| 1IN+ | Comparator 1 Non-inverting Input | Positive input terminal; supports common-mode range down to GND |
| GND | Ground Reference | System ground connection; also serves as return path for output sink current |
| 2IN+ | Comparator 2 Non-inverting Input | Independent positive input; identical electrical characteristics to 1IN+ |
| 2IN− | Comparator 2 Inverting Input | Independent negative input; fully decoupled from comparator 1 |
| 2OUT | Comparator 2 Output | Second open-collector output; electrically isolated from 1OUT but shares same VCC and GND |
| VCC | Positive Supply | Single supply input; powers both comparators; no separate VEE required |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Includes ground and extends to VCC − 2 V - eliminates need for level-shifting when sensing near 0 V |
| Low input offset drift | ±0.37 mV typical at 25°C, ±4 mV max over full temperature range - ensures stable trip points in thermal cycling |
| High ESD ruggedness | 2000 V HBM rating with dedicated internal clamps - reduces system-level ESD design overhead |
| Wide supply voltage tolerance | Operates from 2 V to 36 V - compatible with 3.3 V microcontrollers, 12 V industrial buses, and 24 V PLC backplanes |
| Open-collector outputs | Enable wired-OR logic, mixed-voltage interfacing, and flexible pull-up selection (e.g., 3.3 V or 5 V logic domains) |
Applications
| Motor Drive Protection | Server PSU Monitoring |
|---|---|
|
Use Scenario: Real-time overcurrent detection in BLDC motor gate driver circuits using shunt resistor feedback. IC Role / Device Role / Timing Role: Dual comparator compares amplified shunt voltage against programmable thresholds to trigger fault shutdown within 1 µs. Use Value: Prevents MOSFET destruction by responding faster than legacy LM2903 variants while maintaining SOIC-8 footprint compatibility. |
Use Scenario: Redundant overvoltage and undervoltage monitoring on +12 V and +5 V rails in enterprise-grade server power supplies. IC Role / Device Role / Timing Role: One comparator monitors each rail independently; open-collector outputs feed OR-gated fault signal to system controller. Use Value: Enables fail-safe shutdown before downstream ASICs experience latch-up, leveraging rail-to-rail input capability to sense near-GND and near-VCC conditions. |
| Industrial Sensor Interface | Appliance Safety Control |
|
Use Scenario: Threshold detection for analog temperature and pressure sensors in factory automation controllers. IC Role / Device Role / Timing Role: Compares conditioned sensor output against fixed reference; low 3.5 nA bias current avoids measurement error in high-Z sensor networks. Use Value: Maintains accuracy across –40°C to +125°C ambient without calibration drift compensation circuitry. |
Use Scenario: Lid-open detection and thermal cutoff in cordless power tools and kitchen appliances. IC Role / Device Role / Timing Role: Dual comparator implements redundant safety interlocks - one for mechanical switch, one for thermistor-based overtemperature cut-off. Use Value: Meets IEC 60730 Class B requirements via independent channels and guaranteed 2 kV ESD immunity during handling and assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual open-collector comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2903DR | Same SOIC-8 package, identical pinout, but A-grade (±4 mV max offset, –40°C to +125°C), slightly higher IQ (800 µA max) | Valid for cost-sensitive industrial designs where ±4 mV offset suffices and 1 µs response is not critical | Select LM2903DR only if B-version performance margins (e.g., 0.37 mV typ offset, 200 µA IQ) are unnecessary for the target application. |
| TLV1702IDR | Higher precision (±0.75 mV max offset), rail-to-rail input/output, 36 V supply, but CMOS push-pull output (no external pull-up needed) | Suitable for low-noise sensor front-ends and battery-powered systems requiring active-high outputs | Choose TLV1702IDR when open-collector flexibility is not required and lower input bias (0.1 pA) or true rail-to-rail output swing justifies redesign effort. |
Compared with LM2903DR, LM2903DE4 delivers tighter offset and lower quiescent current; compared with TLV1702IDR, it retains legacy open-collector compatibility and simpler PCB layout but trades off input bias and output architecture.
Availability
LM2903DE4 is available at Aetrix Electronics and suitable for motor drive protection, server PSU monitoring, and industrial sensor interface applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LM2903DE4 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 and embedded processing technologies, with decades of expertise in precision signal conditioning and power management ICs.
The LM2903DE4 belongs to TI's industry-standard dual comparator product line, engineered for reliability in harsh industrial, automotive, and computing environments where long-term stability and wide supply tolerance are critical.
FAQ
What is the maximum supply voltage rating for LM2903DE4?
The LM2903DE4 supports a maximum supply voltage of 36 V, confirmed in Section 5.1 Absolute Maximum Ratings of the official TI datasheet (SLCS005AH). This exceeds legacy LM2903 versions (32 V max) and enables direct use in 24 V industrial systems without derating. Operation above 36 V risks permanent damage.
Does LM2903DE4 support rail-to-rail input common-mode range?
Yes, LM2903DE4 supports a common-mode input voltage range that includes ground and extends up to VCC − 2 V, as specified in Section 5.6 Electrical Characteristics. This allows direct interfacing with 0 V-referenced sensors (e.g., thermocouples, bridge transducers) without level-shifting circuitry.
What is the typical input offset voltage of LM2903DE4 at room temperature?
The LM2903DE4 has a typical input offset voltage of ±0.37 mV at 25°C and VCC = 5 V to 36 V, per Section 5.6 of the TI datasheet. This value is measured across both comparators and represents the median deviation between input terminals required to produce zero output differential - critical for precision threshold setting.
Can LM2903DE4 replace older LM2903 variants without PCB changes?
Yes, LM2903DE4 is a drop-in replacement for LM2903, LM2903V, and LM2903AV in SOIC-8 packages, as explicitly stated in the datasheet's "B-version is drop-in replacement" feature list. Pinout, footprint, and basic electrical behavior are identical - only improved parameters (offset, IQ, speed) require no layout modification.
What output configuration does LM2903DE4 use, and how should it be interfaced?
LM2903DE4 uses open-collector outputs on both comparators, requiring external pull-up resistors to VCC or another logic rail. Section 4 Pin Configuration confirms pins 1OUT and 72OUT are collector terminals; proper interfacing ensures correct logic polarity and sink current compliance (≤21 mA per output).
LM2903DE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- 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
LM2903DE4 FAQ
1.How can I place an order for LM2903DE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903DE4 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 LM2903DE4 reliable?
The price and inventory of LM2903DE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903DE4 is usually 5 days.
3.What payment methods are accepted for LM2903DE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903DE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903DE4?
LM2903DE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903DE4 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 LM2903DE4?
For technical support, including LM2903DE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903DE4 requirements.
6.How does Aetrix verify that LM2903DE4 is sourced from the original manufacturer or authorized distributors?
All LM2903DE4 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 LM2903DE4 meets industry standards.
7.What is the process for return or replacement of LM2903DE4?
All LM2903DE4 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903DE4, 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 LM2903DE4 part is unused and in its original packaging.
Return procedure for LM2903DE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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