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Texas Instruments LM2903VQDRG4
- Part No.:
- LM2903VQDRG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2903VQDRG4.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,168
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Product details
Overview
LM2903VQDRG4 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 36 V, delivers ±0.37 mV typical input offset voltage, 1 µs propagation delay, 200 µA per comparator quiescent current, and supports common-mode input down to ground - enabling direct sensing in battery-monitoring, power-supply sequencing, and motor-control feedback circuits.
For engineers reviewing the LM2903VQDRG4 datasheet, LM2903VQDRG4 pinout, LM2903VQDRG4 application, or LM2903VQDRG4 equivalent, key selection criteria include its −40°C to +125°C operating temperature, SOIC-8 package with exposed thermal pad, B-version enhanced specifications over legacy LM2903, and compatibility with TTL/MOS/CMOS logic outputs in single-supply configurations.
Technical Context
The LM2903VQDRG4 implements two independent open-collector comparators with internal ESD clamps delivering 2 kV HBM rating. Its input stage accepts common-mode voltages from −0.1 V to (VCC − 2 V), allowing one input to reach VCC while the other remains within valid range - critical for high-side sensing without level-shifting. The output stage sinks up to 21 mA at 5 V supply and maintains low saturation voltage (110–400 mV at 4 mA) across temperature.
Designed as a drop-in replacement for LM2903, LM2903V, and LM2903AV, the LM2903VQDRG4 retains identical pinout and functional behavior 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). It does not include internal hysteresis or push-pull output - external pull-up is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports 3.3 V, 5 V, 12 V, and 24 V systems without regulation; compatible with unregulated battery rails. |
| Input Offset Voltage (max) | ±4 mV over −40°C to +125°C - enables accurate threshold detection in temperature-variable environments like motor drives. |
| Propagation Delay | 1 µs typical at 5 V supply with 100 mV overdrive - sufficient for fast overvoltage/undervoltage protection in server PSUs. |
| Quiescent Current | 600 µA typical (all comparators) at 5 V - allows always-on monitoring in low-power industrial sensors. |
| Input Bias Current (max) | 25 nA over temperature - minimizes error in high-impedance sensor interfaces such as thermistor or photodiode circuits. |
| Output Sink Current | 21 mA at VOL = 1.5 V - directly drives LEDs, relays, or logic inputs without external buffer stages. |
| ESD Rating (HBM) | 2000 V - meets industrial handling requirements and reduces need for external protection in board-level designs. |
Pinout & Package
LM2903VQDRG4 is housed in an 8-pin SOIC package (body size 4.90 mm × 3.91 mm) with an exposed thermal pad on the underside, which must be connected directly to GND for optimal thermal performance and ESD robustness.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector output requiring external pull-up; sinks current when comparator 1 output is low. |
| 1IN− | Comparator 1 inverting input | Negative input terminal; used with feedback or reference for hysteresis or window detection. |
| 1IN+ | Comparator 1 non-inverting input | Positive input terminal; commonly connected to sensed signal in overvoltage/undervoltage monitors. |
| GND | Ground reference | System ground return; also connects to exposed thermal pad for thermal and ESD path integrity. |
| 2IN+ | Comparator 2 non-inverting input | Independent positive input; enables dual-threshold detection (e.g., high/low battery warning). |
| 2IN− | Comparator 2 inverting input | Independent negative input; supports differential sensing or reference comparison. |
| 2OUT | Comparator 2 output | Second open-collector output; electrically isolated from 1OUT for independent load control. |
| VCC | Positive supply | Single-supply input; no negative rail required; supports operation up to 36 V absolute maximum. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range including ground | Enables direct interface with 0 V-referenced sensors (e.g., current-sense amplifiers, thermistors) without level-shifting circuitry. |
| Differential input voltage range up to ±38 V | Allows safe operation with inputs exceeding supply rails - critical for detecting transients or floating signals in motor drives. |
| Low input offset drift over temperature | ±0.37 mV typical at 25°C, ±4 mV max over −40°C to +125°C - ensures stable trip points in automotive under-hood applications. |
| Open-collector outputs compatible with TTL/MOS/CMOS | Permits wired-OR logic, mixed-voltage interfacing (e.g., 3.3 V logic driving 5 V bus), and flexible pull-up selection (1 kΩ to 100 kΩ). |
| Exposed thermal pad with GND connection | Reduces junction-to-board thermal resistance to 63.1°C/W - improves reliability in high-ambient-temperature industrial enclosures. |
Applications
| Battery Management System | Industrial Power Supply Monitoring |
|---|---|
|
Use Scenario: Real-time monitoring of Li-ion pack voltage during charge/discharge cycles to trigger overvoltage cutoff and undervoltage sleep mode. IC Role / Device Role / Timing Role: Dual comparator performs independent high-threshold (e.g., 4.3 V) and low-threshold (e.g., 2.8 V) detection with hysteresis. Use Value: ±4 mV max offset ensures ≤10 mV total trip uncertainty across temperature, reducing false triggers in portable medical devices. |
Use Scenario: Detection of AC loss, DC OK, and overcurrent conditions in 48 V telecom rectifiers and server PSUs. IC Role / Device Role / Timing Role: One comparator validates PWR_OK signal timing; second monitors output ripple against reference. Use Value: 1 µs propagation delay enables sub-microsecond fault response, meeting IEC 62368-1 transient immunity requirements. |
| Motor Drive Fault Protection | Building Automation Sensor Interface |
|
Use Scenario: Monitoring phase current sense resistors and bus voltage in BLDC inverters to detect short-circuit or overvoltage faults. IC Role / Device Role / Timing Role: Comparator compares amplified shunt voltage against programmable thresholds to assert hardware shutdown. Use Value: Input common-mode range extending to VCC − 2 V allows direct connection to high-side current sense amps without attenuators. |
Use Scenario: Interfacing with passive analog sensors (e.g., CO₂ NDIR modules, humidity transducers) in HVAC controllers. IC Role / Device Role / Timing Role: Converts slow-moving analog sensor outputs into clean digital status flags for microcontroller GPIOs. Use Value: 25 nA max input bias current prevents loading of high-impedance sensor outputs, preserving measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2903DR | Legacy A-version; ±15 mV max offset, 1.3 µs response, 1 mA supply current, −40°C to +125°C range. | Lower precision and slower response; suitable only where cost dominates over accuracy or speed. | Select LM2903DR only if existing design uses it and no performance upgrade is needed; not recommended for new designs targeting <10 mV trip tolerance. |
| TLV1702IDR | Rail-to-rail input/output, 36 V supply, 0.8 µs response, 125 µA supply current, but only −40°C to +125°C with 1.5 mV offset max. | Push-pull output eliminates pull-up resistor; lower power but higher cost and different pinout (SOIC-8 same, but internal routing differs). | Choose TLV1702IDR when active-high logic output or ultra-low quiescent current is required; verify layout compatibility due to different internal architecture. |
Compared with LM2903DR and TLV1702IDR, the LM2903VQDRG4 uniquely balances B-version precision (±4 mV), industrial temperature range, SOIC-8 pin compatibility with legacy LM2903, and proven field reliability - making it the optimal upgrade path for cost-sensitive, high-volume industrial controls.
Availability
LM2903VQDRG4 is available at Aetrix Electronics and suitable for battery management systems, industrial power supply monitoring, motor drive fault protection, and building automation sensor interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM2903VQDRG4 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 LM2903VQDRG4 belongs to TI's industry-standard dual comparator product line, engineered for ruggedized industrial and automotive applications demanding wide supply range, ground-sensing capability, and reliable open-collector output performance.
FAQ
What is the maximum supply voltage rating for LM2903VQDRG4?
The LM2903VQDRG4 has an absolute maximum supply voltage of 38 V, with recommended operating range from 2 V to 36 V. This exceeds legacy LM2903 (32 V max) and supports direct use with 24 V industrial rails and transient-tolerant 36 V systems without external clamping.
Does LM2903VQDRG4 include internal hysteresis?
No, the LM2903VQDRG4 does not include internal hysteresis. Hysteresis must be added externally via positive feedback from output to non-inverting input. This design choice preserves flexibility for custom threshold spacing and avoids fixed hysteresis that could compromise precision in applications like battery voltage window detection.
Can LM2903VQDRG4 operate with a single 3.3 V supply?
Yes, LM2903VQDRG4 operates down to 2 V supply, making it fully compatible with 3.3 V systems. At 3.3 V, it maintains full functionality including ground-referenced input range and 21 mA sink capability - ideal for interfacing with 3.3 V microcontrollers and low-voltage sensors.
What is the purpose of the exposed thermal pad on LM2903VQDRG4?
The exposed thermal pad on the LM2903VQDRG4 must be soldered directly to a GND plane to provide a low-resistance thermal and ESD discharge path. This reduces junction-to-board thermal resistance to 63.1°C/W and enhances reliability in high-ambient-temperature environments such as enclosed motor drives or industrial PLCs.
Is LM2903VQDRG4 pin-compatible with standard LM2903 variants?
Yes, LM2903VQDRG4 uses the standard SOIC-8 footprint and identical pinout as LM2903, LM2903V, and LM2903AV. It is a direct drop-in replacement with improved electrical specs - no PCB or schematic changes are required when upgrading from legacy versions in existing designs.
LM2903VQDRG4 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 @ 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
LM2903VQDRG4 FAQ
1.How can I place an order for LM2903VQDRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903VQDRG4 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 LM2903VQDRG4 reliable?
The price and inventory of LM2903VQDRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903VQDRG4 is usually 5 days.
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4.How is shipping managed for LM2903VQDRG4?
LM2903VQDRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903VQDRG4 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 LM2903VQDRG4?
For technical support, including LM2903VQDRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903VQDRG4 requirements.
6.How does Aetrix verify that LM2903VQDRG4 is sourced from the original manufacturer or authorized distributors?
All LM2903VQDRG4 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 LM2903VQDRG4 meets industry standards.
7.What is the process for return or replacement of LM2903VQDRG4?
All LM2903VQDRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903VQDRG4, 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 LM2903VQDRG4 part is unused and in its original packaging.
Return procedure for LM2903VQDRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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