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Texas Instruments LM2903DGKR
- Part No.:
- LM2903DGKR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM2903DGKR.pdf
- Description:
- IC COMPARATOR 2 DIFF 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:216,113
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Product details
Overview
LM2903DGKR from Texas Instruments is a dual precision voltage comparator in VSSOP-8 package, designed for single-supply operation from 2 V to 36 V. It delivers ±0.37 mV typical input offset voltage, 1 µs propagation delay, 3.5 nA input bias current, 600 µA total quiescent current, and rail-to-rail input common-mode range down to ground - enabling robust level detection in motor control feedback and power supply monitoring circuits.
For engineers reviewing the LM2903DGKR datasheet, LM2903DGKR pinout, LM2903DGKR application, or LM2903DGKR equivalent, key selection considerations include its B-version enhanced ESD rating (2 kV HBM), extended –40°C to +125°C operating temperature, compatibility with TTL/MOS/CMOS logic outputs, and drop-in replacement capability for legacy LM2903 variants without layout changes.
Technical Context
The LM2903DGKR implements two independent open-collector comparators with dedicated ESD clamps, supporting differential input voltages up to ±38 V and common-mode inputs extending to VCC – 2 V. Its architecture enables reliable operation even when one input exceeds the valid common-mode range, provided the other remains within specification.
It features low-voltage operation starting at 2 V, supply-current independence from VCC, and output saturation compatible with pull-up networks to any logic rail ≤36 V. The device's propagation delay is specified under 1 µs for 100 mV overdrive with 15 pF load, making it suitable for fast threshold detection in industrial timing and fault-sensing applications.
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 (typ) | ±0.37 mV - enables accurate low-level signal comparison, e.g., <10 mV current-sense thresholds. |
| Propagation Delay (typ) | 1 µs - ensures timely response in overvoltage lockout and PWM synchronization circuits. |
| Input Bias Current (typ) | 3.5 nA - minimizes error in high-impedance sensor interfaces like thermistor or photodiode networks. |
| Quiescent Current (max) | 800 µA at 36 V and –40°C to +125°C - enables low-power always-on monitoring in battery-backed systems. |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 2 requirements for board-level robustness in factory automation. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial motor drive environments. |
Pinout & Package
VSSOP-8 (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm pitch, exposed thermal pad connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector output requiring external pull-up; sinks up to 21 mA at VOL ≤ 400 mV (4 mA load). |
| 1IN− | Comparator 1 inverting input | Differential input node; accepts voltages from –0.3 V to VCC + 0.3 V with no damage. |
| 1IN+ | Comparator 1 non-inverting input | Same voltage tolerance as 1IN−; supports rail-to-rail common-mode range including ground. |
| GND | Ground reference | Primary return path; thermal pad must be soldered directly to PCB GND plane for thermal performance. |
| 2IN+ | Comparator 2 non-inverting input | Independent of Comparator 1; enables dual-threshold or window-comparator configurations. |
| 2IN− | Comparator 2 inverting input | Matches 1IN− specs; allows differential sensing across two separate signals or channels. |
| 2OUT | Comparator 2 output | Functionally identical to 1OUT; supports independent logic-level translation per channel. |
| VCC | Positive supply | Single supply input; powers both comparators; no negative rail required. |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in B-version upgrade | Replaces LM2903, LM2903V, and LM2903AV without PCB or firmware changes. |
| Rail-to-rail input common-mode range | Includes ground and extends to VCC – 2 V - simplifies direct sensing of low-side shunt or battery terminals. |
| Output logic compatibility | Drives TTL, MOS, and CMOS loads via configurable pull-up - eliminates level-shifter ICs. |
| Enhanced ruggedness | Dedicated ESD clamps + 2 kV HBM rating - reduces field failure risk in unshielded industrial enclosures. |
| Low input bias current | 3.5 nA typ - preserves accuracy in high-Z voltage dividers used for battery voltage monitoring. |
Applications
| Motor Drive Protection | Server Power Supply Monitoring |
|---|---|
|
Use Scenario: Real-time overcurrent detection using shunt resistor feedback in BLDC motor gate drivers. IC Role / Device Role / Timing Role: Dual comparator compares sensed current against upper/lower thresholds to trigger immediate shutdown. Use Value: 1 µs response time enables cycle-by-cycle current limiting; ±0.37 mV offset ensures <5% trip-point error at 100 mV sense voltage. |
Use Scenario: Monitoring +12 V and +5 V rails in redundant server PSUs for brownout/fault reporting. IC Role / Device Role / Timing Role: One comparator supervises each rail against precision reference; outputs feed system management controller. Use Value: Single 36 V supply eliminates auxiliary bias rail; –40°C to +125°C rating supports fanless chassis operation. |
| Industrial Vacuum Robot Control | Cordless Power Tool Battery Management |
|
Use Scenario: Detecting vacuum pressure loss via analog sensor output crossing preset thresholds. IC Role / Device Role / Timing Role: Configured as window comparator to assert fault only when pressure falls outside safe band. Use Value: Rail-to-rail input allows direct interface to 0–5 V sensor; 3.5 nA bias current prevents loading error in RC filter networks. |
Use Scenario: Cell voltage balancing enable/disable and pack overvoltage cutoff in 18 V Li-ion tool packs. IC Role / Device Role / Timing Role: Compares cell string voltage against reference; drives MOSFET gate via open-collector output. Use Value: 36 V absolute max rating accommodates full 20-cell stack transients; 800 µA max IQ extends runtime in sleep mode. |
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 | SOIC-8 package (4.90 mm × 3.91 mm); same electrical specs but higher RθJA (148.5°C/W vs. 193.7°C/W). | Preferred for through-hole prototyping or legacy board reuse; less suitable for space-constrained motor control PCBs. | Select LM2903DR when board real estate permits larger footprint and thermal margin is sufficient. |
| LM2903PWR | TSSOP-8 package (3.00 mm × 4.40 mm); identical specs and thermal resistance (200.6°C/W), but 0.65 mm pitch matches DGK. | Better suited for automated optical inspection (AOI) due to exposed leads; slightly longer body may affect routing density. | Choose LM2903PWR if TSSOP handling infrastructure exists and lead visibility is prioritized over minimal area. |
Compared with LM2903DR and LM2903PWR, the LM2903DGKR offers the smallest footprint (3.00 mm × 3.00 mm) and best thermal performance among VSSOP/TSSOP/SOIC variants - critical for high-density motor driver modules where power dissipation and board area are constrained.
Availability
LM2903DGKR is available at Aetrix Electronics and suitable for motor drive protection, server power supply monitoring, and cordless power tool battery management requiring stable component supply across automotive, industrial, and computing end markets.
Supply support for LM2903DGKR 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 LM2903B family - including LM2903DGKR - was engineered to upgrade legacy dual comparators with tighter offset, faster response, and enhanced ruggedness for industrial motor control, power conversion, and battery-powered equipment.
FAQ
What is the maximum supply voltage rating for LM2903DGKR?
The LM2903DGKR supports an absolute maximum supply voltage of 38 V, exceeding the 36 V recommended operating limit. This headroom accommodates transient spikes in industrial power rails while maintaining functional integrity - critical for use in 24 V and 36 V motor drive systems where load-dump events occur.
Does LM2903DGKR require a negative supply rail?
No, the LM2903DGKR operates from a single positive supply (2 V to 36 V) with inputs referenced to ground. Its common-mode input range includes ground and extends to VCC – 2 V, enabling direct interface with low-side current-sense amplifiers and battery terminals without level-shifting circuitry.
Can LM2903DGKR replace older LM2903 variants on existing PCBs?
Yes - the LM2903DGKR is a drop-in replacement for LM2903, LM2903V, and LM2903AV in VSSOP-8 footprint. Pinout, electrical behavior, and thermal pad connection are identical; no layout or firmware changes are needed to upgrade performance and reliability.
What is the output configuration of LM2903DGKR?
The LM2903DGKR features two independent open-collector outputs (1OUT and 2OUT). Each requires an external pull-up resistor to a logic rail (e.g., 3.3 V or 5 V) and can sink up to 21 mA while maintaining VOL ≤ 400 mV at 4 mA load - supporting direct interfacing with microcontrollers and logic gates.
How does the thermal pad on LM2903DGKR affect PCB layout?
The exposed thermal pad on the underside of the LM2903DGKR must be soldered directly to a solid GND copper pour on the PCB. This connection reduces junction-to-board thermal resistance to 63.1°C/W, preventing thermal runaway during sustained 21 mA output sinking and ensuring long-term reliability in sealed enclosures.
LM2903DGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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
- :
- 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-VSSOP
LM2903DGKR FAQ
1.How can I place an order for LM2903DGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903DGKR 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 LM2903DGKR reliable?
The price and inventory of LM2903DGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903DGKR is usually 5 days.
3.What payment methods are accepted for LM2903DGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903DGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903DGKR?
LM2903DGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903DGKR 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 LM2903DGKR?
For technical support, including LM2903DGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903DGKR requirements.
6.How does Aetrix verify that LM2903DGKR is sourced from the original manufacturer or authorized distributors?
All LM2903DGKR 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 LM2903DGKR meets industry standards.
7.What is the process for return or replacement of LM2903DGKR?
All LM2903DGKR units undergo pre-shipment inspection (PSI). If there is an issue with LM2903DGKR, 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 LM2903DGKR part is unused and in its original packaging.
Return procedure for LM2903DGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2903DGKR Tags
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