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Texas Instruments LM2903AVQDR
- Part No.:
- LM2903AVQDR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2903AVQDR.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,494
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Product details
Overview
LM2903AVQDR from Texas Instruments is a dual voltage comparator IC designed for single-supply operation across 2 V to 30 V, featuring ±4 mV max input offset voltage, 1.3 µs typical response time, and rail-to-rail input capability down to ground - deployed in server power supplies, motor drives, and industrial control feedback loops.
For engineers reviewing the LM2903AVQDR datasheet, LM2903AVQDR pinout, LM2903AVQDR application, or LM2903AVQDR equivalent, this page delivers verified electrical specs, package-validated pin functions, real-world use cases, and two confirmed alternative parts with documented functional and thermal differences.
Technical Context
The LM2903AVQDR implements two independent open-collector comparators with internal ESD clamps, supporting differential input voltages up to ±30 V and common-mode input range extending to ground. Its architecture enables direct interfacing with TTL, MOS, and CMOS logic without level-shifting.
Quiescent current remains stable across supply voltage (0.8–1 mA at 5 V to 30 V), and output saturation voltage stays below 400 mV at 4 mA sink - critical for low-power sensing and hysteresis-based threshold detection in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 30 V - supports wide-input industrial and automotive power rails without external regulation |
| Input Offset Voltage (max) | ±4 mV over temperature - ensures reliable threshold detection in precision voltage monitoring |
| Response Time (typ) | 1.3 µs - enables fast overvoltage/undervoltage fault response in PSU protection circuits |
| Input Bias Current (max) | 250 nA - minimizes error in high-impedance sensor interfaces (e.g., thermistor networks) |
| Output Sink Current (min) | 6 mA - drives standard pull-up resistors and LED indicators directly |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 2 for robust handling in automated assembly |
| Operating Temperature | −40°C to +125°C - qualified for under-hood and factory-floor embedded control |
Pinout & Package
LM2903AVQDR is housed in an SOIC-8 (D) package measuring 4.90 mm × 3.91 mm, with gull-wing leads and standard 1.27 mm pitch - compatible with reflow soldering and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector node requiring external pull-up; sinks current when IN+ > IN− |
| 1IN− | Comparator 1 inverting input | Accepts reference or feedback signal; common-mode range includes ground |
| 1IN+ | Comparator 1 non-inverting input | Accepts sensed voltage; supports inputs up to VCC without damage |
| GND | Ground reference | Primary return path for both comparators and bias currents |
| 2IN+ | Comparator 2 non-inverting input | Independent input channel for dual-threshold or window-comparator topologies |
| 2IN− | Comparator 2 inverting input | Supports differential sensing or inverted logic configuration |
| 2OUT | Comparator 2 output | Independent open-collector output; electrically isolated from 1OUT |
| VCC | Positive supply | Single supply pin powering both comparators; no separate ground-referenced bias needed |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Includes ground and extends to VCC − 2 V - eliminates need for input biasing in single-supply systems |
| Differential input voltage tolerance | ±30 V - withstands transient surges and mismatched sensor offsets without latch-up |
| Low quiescent current | 0.8–1 mA total - enables always-on monitoring in battery-backed or energy-constrained applications |
| Output compatibility | TTL/MOS/CMOS - interfaces directly with microcontroller GPIOs, FPGAs, and logic gates without buffers |
| Thermal performance | RθJA = 148.5°C/W - supports continuous operation at full load in ambient up to 85°C with minimal heatsinking |
Applications
| Server Power Supply Monitoring | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Real-time detection of overvoltage, undervoltage, and overcurrent faults in 12 V / 48 V server PSUs. IC Role / Device Role / Timing Role: Dual comparator provides independent thresholds for VOUT monitoring and current-sense amplifier output comparison. Use Value: 1.3 µs response time enables sub-microsecond fault shutdown, preventing MOSFET destruction during transient events. | Use Scenario: Overtemperature and phase-loss detection in 3-phase BLDC motor controllers. IC Role / Device Role / Timing Role: One comparator monitors thermistor voltage against fixed reference; second compares back-EMF zero-crossing timing. Use Value: Rail-to-rail input allows direct connection to thermistor divider without level shift, reducing BOM count and layout area. |
| Factory Automation Sensor Interface | Appliance Safety Interlock System |
Use Scenario: Converting analog signals from pressure, flow, and proximity sensors into digital logic levels for PLC input modules. IC Role / Device Role / Timing Role: Comparator acts as analog-to-digital front-end with hysteresis, rejecting noise on long sensor cables. Use Value: 250 nA max input bias current prevents loading of high-impedance sensor outputs, preserving accuracy in 4–20 mA loop interfaces. | Use Scenario: Door interlock verification and lid-open detection in washing machines and microwaves. IC Role / Device Role / Timing Role: Dual comparator validates redundant mechanical switch states and monitors safety relay coil voltage. Use Value: −40°C to +125°C rating ensures reliable operation inside sealed, thermally stressed appliance enclosures. |
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; identical electrical specs but rated only to +85°C ambient (not +125°C) | Limited to commercial-grade equipment; unsuitable for under-hood or high-temp industrial enclosures | Select LM2903DR only if operating ambient stays ≤85°C and cost sensitivity outweighs thermal margin |
| LM2903BQDR | B-version: ±0.37 mV typ offset, 200 µA per comparator, 36 V max supply, −40°C to +125°C | Superior precision and lower power; drop-in replacement where tighter thresholds and extended voltage range are required | Choose LM2903BQDR when upgrading legacy designs needing improved offset, speed, or supply headroom |
Compared with LM2903DR, LM2903AVQDR offers guaranteed 125°C operation and tighter offset spec; versus LM2903BQDR, it trades lower offset and current for proven qualification in established A-grade production lines with known reliability data.
Availability
LM2903AVQDR is available at Aetrix Electronics and suitable for server power supply monitoring, industrial motor drive protection, and factory automation sensor interface requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LM2903AVQDR 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 family was engineered as a rugged, cost-optimized dual comparator platform for industrial control, power management, and safety-critical threshold detection - emphasizing reliability, wide supply range, and ease of integration.
FAQ
What is the maximum supply voltage rating for LM2903AVQDR?
The LM2903AVQDR has an absolute maximum supply voltage of 36 V, but its recommended operating range is 2 V to 30 V. Operating above 30 V may exceed specified electrical characteristics and reduce long-term reliability. Always observe derating guidelines in TI's SLCS005AH datasheet for sustained operation at elevated voltages.
Does LM2903AVQDR support rail-to-rail input operation?
Yes, LM2903AVQDR supports rail-to-rail input common-mode range - specifically from ground (V−) up to VCC − 2 V. This allows direct interfacing with sensors and references referenced to ground or VCC without external biasing networks, simplifying design in single-supply systems.
Can LM2903AVQDR drive a 10 kΩ pull-up resistor reliably?
Yes, LM2903AVQDR can sink ≥6 mA at VOL ≤ 400 mV, enabling robust operation with 10 kΩ pull-ups at 5 V (0.5 mA load) or even 1 kΩ at 30 V (3 mA load). Its open-collector output maintains logic-low integrity across temperature and supply variations, making it suitable for driving LEDs, optocouplers, and microcontroller interrupt lines.
Is LM2903AVQDR pin-compatible with LM2903DR?
Yes, LM2903AVQDR is pin-compatible with LM2903DR in the SOIC-8 (D) package - same pinout, footprint, and solder profile. However, LM2903AVQDR is qualified for −40°C to +125°C operation, while LM2903DR is rated only to +85°C. Thermal validation is required before substitution in high-ambient applications.
What is the input offset voltage specification for LM2903AVQDR over temperature?
The LM2903AVQDR specifies a maximum input offset voltage of ±4 mV over the full operating temperature range of −40°C to +125°C. This value is guaranteed by design and test - not typical or room-temperature only - ensuring consistent threshold accuracy in thermal cycling environments like motor drives and power converters.
LM2903AVQDR 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, ±1V ~ 18V
- :
- 2mV @ 32V
- 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
LM2903AVQDR FAQ
1.How can I place an order for LM2903AVQDR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903AVQDR 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 LM2903AVQDR reliable?
The price and inventory of LM2903AVQDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903AVQDR is usually 5 days.
3.What payment methods are accepted for LM2903AVQDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903AVQDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903AVQDR?
LM2903AVQDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903AVQDR 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 LM2903AVQDR?
For technical support, including LM2903AVQDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903AVQDR requirements.
6.How does Aetrix verify that LM2903AVQDR is sourced from the original manufacturer or authorized distributors?
All LM2903AVQDR 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 LM2903AVQDR meets industry standards.
7.What is the process for return or replacement of LM2903AVQDR?
All LM2903AVQDR units undergo pre-shipment inspection (PSI). If there is an issue with LM2903AVQDR, 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 LM2903AVQDR part is unused and in its original packaging.
Return procedure for LM2903AVQDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2903AVQDR Tags
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