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Texas Instruments LM2903AVQDRG4
- Part No.:
- LM2903AVQDRG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2903AVQDRG4.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,790
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Product details
Overview
LM2903AVQDRG4 from Texas Instruments is a dual precision voltage comparator designed for industrial and automotive applications requiring wide supply range, rail-to-rail input capability, and robust ESD performance. It operates from 2 V to 30 V, delivers ±4 mV max input offset voltage over temperature, 1.3 µs typical response time, and supports open-collector outputs compatible with TTL, MOS, and CMOS logic-used in motor drive fault detection and server PSU overvoltage monitoring.
For engineers reviewing the LM2903AVQDRG4 datasheet, LM2903AVQDRG4 pinout, LM2903AVQDRG4 application, or LM2903AVQDRG4 equivalent, key selection criteria include its −25°C to +85°C operating range, SOIC-8 package, 1.3 µs propagation delay, 2.5 mA max supply current, and compatibility with legacy LM2903 designs while offering improved input bias current (−25 nA typ) and common-mode input range extending to ground.
Technical Context
The LM2903AVQDRG4 implements two independent comparators with rail-to-rail input stage enabling operation down to ground, supporting differential input voltages up to ±30 V. Its internal architecture includes dedicated ESD clamps delivering 2 kV HBM rating and low input bias current optimized for high-impedance sensing nodes.
It features open-collector outputs capable of sinking up to 6 mA per channel at 1.5 V output voltage, with low-level output voltage as low as 150 mV at 4 mA sink current. Quiescent current remains stable across supply voltage (2–30 V) and temperature (−25°C to +85°C), enabling reliable use in battery-backed and wide-input industrial power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 30 V - supports single-supply operation across 12 V, 24 V, and 28 V industrial rails without level-shifting. |
| Input Offset Voltage (max) | ±4 mV over −25°C to +85°C - ensures accurate threshold detection in precision voltage monitoring circuits. |
| Response Time (typ) | 1.3 µs - enables fast fault response in motor control and UPS systems where timing margins are tight. |
| Input Bias Current (typ) | −25 nA - minimizes error in high-impedance sensor interfaces such as thermistor or photodiode signal conditioning. |
| Output Sink Current (min) | 6 mA at VOL = 1.5 V - drives standard pull-up resistors and logic inputs directly without external buffers. |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 2 requirements for industrial board-level robustness. |
| Common-Mode Input Range | 0 V to (VCC − 2 V) - allows direct sensing of signals referenced to ground, e.g., current-sense amplifier outputs. |
Pinout & Package
LM2903AVQDRG4 is housed in an 8-pin SOIC package (4.90 mm × 3.91 mm body size) with standard pinout and thermal performance suitable for reflow assembly and industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 Output | Open-collector output; requires external pull-up to define logic HIGH level and interface with downstream logic families. |
| 1IN− | Comparator 1 Inverting Input | Negative input node; accepts signals within common-mode range (0 V to VCC − 2 V) and tolerates differential input up to ±30 V. |
| 1IN+ | Comparator 1 Non-Inverting Input | Positive input node; used for reference or signal comparison; same voltage range and ruggedness as 1IN−. |
| GND | Ground Reference | System ground connection; serves as return path for input bias currents and output sink current. |
| 2IN+ | Comparator 2 Non-Inverting Input | Independent input for second comparator channel; electrically isolated from first channel except shared supply and ground. |
| 2IN− | Comparator 2 Inverting Input | Second comparator's negative input; identical electrical characteristics and voltage ratings as 1IN−. |
| 2OUT | Comparator 2 Output | Open-collector output; functionally identical to 1OUT and may be wire-OR'd with other comparators if needed. |
| VCC | Positive Supply | Single positive supply input (2–30 V); powers both comparators; quiescent current independent of supply voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Includes ground (0 V), enabling direct interface with low-side current-sense amplifiers and battery-monitoring circuits. |
| Differential input voltage tolerance | ±30 V - protects inputs against transient overvoltage during hot-plug or inductive switching events. |
| Low input offset drift | ±4 mV max over full temperature range - maintains accuracy in ambient-variable environments like factory automation enclosures. |
| Open-collector output compatibility | TTL/MOS/CMOS - simplifies integration into mixed-voltage systems using flexible pull-up configurations. |
| Stable quiescent current | 0.8–2.5 mA across 2–30 V supply - eliminates need for supply regulation in wide-input power supplies. |
Applications
| Motor Drive Fault Detection | Server PSU Overvoltage Protection |
|---|---|
Use Scenario: Monitoring phase current and bus voltage in BLDC motor controllers to trigger shutdown on overcurrent or overvoltage faults. IC Role / Device Role / Timing Role: Dual comparator compares sensed signals against fixed thresholds; one channel detects overcurrent via shunt voltage, the other monitors DC bus voltage. Use Value: 1.3 µs response time ensures fault reaction within safe switching cycle limits; ±4 mV offset enables precise trip-point setting without calibration. | Use Scenario: Real-time monitoring of +12 V and +54 V rails in redundant server power supplies to disable faulty modules before damage occurs. IC Role / Device Role / Timing Role: LM2903AVQDRG4 acts as independent voltage supervisor for each rail, driving OR-ed fault signals to system management controller. Use Value: 30 V absolute maximum supply rating allows direct connection to 24 V auxiliary rails; open-collector outputs enable wired-AND fault aggregation. |
| Industrial Vacuum Robot Sensing | Building Automation HVAC Control |
Use Scenario: Detecting vacuum pressure loss and motor stall conditions in cleanroom vacuum handling robots using analog pressure transducers and current feedback. IC Role / Device Role / Timing Role: Comparator 1 monitors pressure transducer output against low-threshold reference; Comparator 2 monitors motor winding current for stall detection. Use Value: Rail-to-rail input enables direct interface with 0–5 V transducer outputs; −25 nA input bias avoids loading high-impedance sensor bridges. | Use Scenario: Supervising fan speed feedback (tachometer pulses) and temperature sensor outputs in HVAC zone controllers to maintain setpoint accuracy and prevent overheating. IC Role / Device Role / Timing Role: One comparator converts analog thermistor voltage to digital enable signal; the other validates tach pulse presence and amplitude. Use Value: 2 kV HBM ESD rating ensures reliability in field-deployed units exposed to handling discharge; SOIC-8 package supports automated optical inspection. |
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 for −40°C to +125°C temperature range. | Preferred for automotive under-hood or extended-temperature industrial deployments. | Select LM2903DR when operating beyond −25°C to +85°C range is required; LM2903AVQDRG4 remains optimal for cost-sensitive commercial-grade systems. |
| LM2903BQDR | B-version with ±0.37 mV typical offset, 200 µA per comparator supply current, and 36 V max supply rating. | Offers higher precision and lower power for next-gen designs where B-version qualification is mandated. | Choose LM2903BQDR for new designs targeting tighter offset budgets and wider supply flexibility; LM2903AVQDRG4 suits legacy-compatible upgrades with existing layout and qualification. |
Compared with LM2903DR and LM2903BQDR, LM2903AVQDRG4 provides a balanced trade-off: it retains full pin compatibility and functional equivalence with standard LM2903 designs while offering verified −25°C to +85°C operation and cost-optimized qualification-making it ideal for established industrial platforms needing drop-in reliability without redesign.
Availability
LM2903AVQDRG4 is available at Aetrix Electronics and suitable for motor drive fault detection, server PSU overvoltage protection, and industrial vacuum robot sensing requiring stable component supply across multi-year production cycles.
Supply support for LM2903AVQDRG4 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 chain and power management ICs.
The LM2903 family was engineered for industrial and automotive voltage comparison tasks demanding wide supply range, input ruggedness, and long-term reliability-LM2903AVQDRG4 specifically targets cost-sensitive commercial and industrial applications with validated −25°C to +85°C operation.
FAQ
What is the maximum supply voltage rating for LM2903AVQDRG4?
The LM2903AVQDRG4 has an absolute maximum supply voltage of 36 V, but its recommended operating range is 2 V to 30 V. This 30 V upper limit aligns with the "V" suffix designation in the part number, distinguishing it from non-V versions rated for 32 V and B-versions rated for 36 V. Operation within 2–30 V ensures guaranteed parametric performance per the datasheet specifications.
Does LM2903AVQDRG4 support rail-to-rail input operation?
Yes, LM2903AVQDRG4 supports rail-to-rail input common-mode voltage range down to ground (0 V), with an upper limit of VCC − 2 V. This allows direct interfacing with sensors and amplifiers whose outputs swing near ground-such as low-side current-sense circuits-without external level-shifting. The device tolerates differential input voltages up to ±30 V, enhancing robustness in noisy industrial environments.
What is the typical propagation delay of LM2903AVQDRG4?
The LM2903AVQDRG4 exhibits a typical propagation delay of 1.3 µs under standard test conditions (VCC = 5 V, RL = 5.1 kΩ, CL = 15 pF, 100 mV input step). This value is consistent across the LM2903 "V" and "AV" variants and reflects the device's suitability for medium-speed supervision tasks-including PSU fault detection and motor control safety interlocks-where sub-microsecond response is not required but deterministic timing is critical.
Can LM2903AVQDRG4 replace older LM2903 variants in existing designs?
Yes, LM2903AVQDRG4 is a direct drop-in replacement for LM2903, LM2903V, and LM2903AV in SOIC-8 packages. It shares identical pinout, electrical behavior, and thermal characteristics. Key improvements include enhanced ESD rating (2 kV HBM) and tighter input offset voltage specification (±4 mV max), making it suitable for upgrading legacy systems without PCB or firmware changes.
What output configuration does LM2903AVQDRG4 use?
LM2903AVQDRG4 uses open-collector outputs on both comparator channels (pins 1 and 7). Each output requires an external pull-up resistor to define the HIGH logic level and interface with downstream logic families (TTL, MOS, CMOS). This configuration enables wired-AND functionality, level translation across different supply domains, and simplified fault-bus aggregation in multi-channel supervision systems.
LM2903AVQDRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
LM2903AVQDRG4 FAQ
1.How can I place an order for LM2903AVQDRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903AVQDRG4 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 LM2903AVQDRG4 reliable?
The price and inventory of LM2903AVQDRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903AVQDRG4 is usually 5 days.
3.What payment methods are accepted for LM2903AVQDRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903AVQDRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903AVQDRG4?
LM2903AVQDRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903AVQDRG4 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 LM2903AVQDRG4?
For technical support, including LM2903AVQDRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903AVQDRG4 requirements.
6.How does Aetrix verify that LM2903AVQDRG4 is sourced from the original manufacturer or authorized distributors?
All LM2903AVQDRG4 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 LM2903AVQDRG4 meets industry standards.
7.What is the process for return or replacement of LM2903AVQDRG4?
All LM2903AVQDRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903AVQDRG4, 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 LM2903AVQDRG4 part is unused and in its original packaging.
Return procedure for LM2903AVQDRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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