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Texas Instruments LM2903QDGKRQ1
- Part No.:
- LM2903QDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM2903QDGKRQ1.pdf
- Description:
- IC COMPARATOR 2 DIFF 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,444
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Product details
Overview
LM2903QDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified dual open-drain comparator for automotive systems, operating from 2 V to 36 V supply, with ±0.37 mV typical input offset voltage, 3.5 nA typical input bias current, and 1 µs typical propagation delay. It serves in voltage monitoring, window detection, and level-shifting circuits within HEV/EV powertrain and body control modules.
For engineers reviewing the LM2903QDGKRQ1 datasheet, LM2903QDGKRQ1 pinout, LM2903QDGKRQ1 application, or LM2903QDGKRQ1 equivalent, this page delivers verified electrical specs, automotive-grade thermal and ESD performance (2 kV HBM), package-validated pin functions, and real-world use cases aligned with TI's LM2903B-Q1 family documentation.
Technical Context
The LM2903QDGKRQ1 implements two independent PNP Darlington-pair input comparators enabling high gain, low input bias current, and rail-to-rail common-mode input range down to ground. Its open-drain outputs support wired-AND logic and flexible pull-up voltage selection up to 36 V.
It operates across –40°C to +125°C ambient temperature, supports single- or dual-supply configurations (with ≥1.5 V headroom between VCC and input common-mode), and features integrated input clamping (Q15) to force low output when inputs exceed VCM limits - critical for robustness in noisy automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - enables direct interface with 12 V/24 V automotive batteries and compatibility with 3.3 V/5 V logic domains via external pull-up. |
| Input Offset Voltage (typ) | ±0.37 mV - ensures accurate threshold detection in precision battery monitoring and sensor signal conditioning. |
| Input Bias Current (typ) | 3.5 nA - minimizes loading on high-impedance sources such as thermistors or resistive divider references. |
| Propagation Delay (typ) | 1 µs at 5 V supply - supports fast response in overvoltage lockout and motor phase timing applications. |
| ESD Rating (HBM) | 2 kV - meets AEC-Q100 stress requirements for assembly and in-vehicle operation without additional protection circuitry. |
| Output Type | Open-drain NPN - allows level translation, wired-AND logic, and direct interfacing with TTL, CMOS, or microcontroller GPIO pins. |
| Operating Temperature | –40°C to +125°C ambient - validated for under-hood and powertrain locations per AEC-Q100 Grade 1. |
Pinout & Package
VSSOP-8 (DGK) package: 3.00 mm × 4.40 mm body, exposed thermal pad connected directly to GND for improved thermal dissipation in high-ambient automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-drain NPN sink - requires external pull-up; drives low when IN+ < IN− by > VIO. |
| 1IN− | Comparator 1 inverting input | Accepts signals from ground to (VCC − 1.5 V); supports differential input up to ±38 V. |
| 1IN+ | Comparator 1 non-inverting input | Same voltage range as 1IN−; enables reference-based or zero-crossing detection topologies. |
| GND | Ground reference | Common return for supply, inputs, and thermal pad - must be low-impedance connection for stability. |
| 2IN+ | Comparator 2 non-inverting input | Independent of Comparator 1; supports dual-threshold or window-comparator configurations. |
| 2IN− | Comparator 2 inverting input | Matches 1IN− specs; enables differential sensing or feedback path monitoring. |
| 2OUT | Comparator 2 output | Independent open-drain output - can be tied to 1OUT for wired-AND logic or separate pull-ups. |
| VCC | Positive supply | Single-supply input; supports dual supplies if |V+ − V−| ≤ 36 V and V+ ≥ (VCM + 1.5 V). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation with full production test coverage per automotive reliability standards. |
| Low input offset voltage | ±0.37 mV typical (DGK package) - reduces false triggering in narrow-window voltage supervision. |
| Wide common-mode input range | Includes ground and extends to (VCC − 1.5 V) - enables direct sensing of battery voltage or shunt-based current detection. |
| 2 kV HBM ESD protection | Integrated on all pins - eliminates need for external TVS diodes in most board-level ESD scenarios. |
| Functional safety documentation support | TI provides FIT rate data, failure mode analysis, and safety manual - accelerates ISO 26262 ASIL-B system integration. |
Applications
| Overvoltage Protection Circuit | Battery Cell Monitoring |
|---|---|
Use Scenario: Detecting battery pack voltage exceeding safe thresholds in 48 V mild-hybrid systems. IC Role / Device Role / Timing Role: Dual comparator compares sensed voltage against upper/lower reference rails to assert fault flag. Use Value: ±0.37 mV offset enables <10 mV detection margin; 36 V supply rating allows direct connection to pack bus without level shifters. |
Use Scenario: Monitoring individual Li-ion cell voltages during charging/discharging in EV battery management systems. IC Role / Device Role / Timing Role: Each comparator independently checks cell voltage against overcharge/undervoltage thresholds. Use Value: 3.5 nA input bias current prevents measurement error in high-resistance voltage dividers used for isolation. |
| Window Comparator for Motor Phase Detection | Level Translation Interface |
Use Scenario: Validating zero-crossing and commutation timing in BLDC motor controllers using back-EMF sensing. IC Role / Device Role / Timing Role: One comparator detects rising edge, the other falling edge of sinusoidal back-EMF waveform. Use Value: 1 µs propagation delay ensures sub-microsecond timing resolution; open-drain outputs interface directly with MCU interrupt pins. |
Use Scenario: Translating 12 V sensor signals to 3.3 V MCU inputs in automotive body control modules. IC Role / Device Role / Timing Role: Comparator acts as voltage-level translator with hysteresis enabled via feedback resistor. Use Value: 2 V to 36 V supply range permits use of same part for multiple voltage domains; rail-to-ground input supports unipolar sensor outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual open-drain comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2903QPWRQ1 | VSSOP-8 package with identical electrical specs; 176.5°C/W RθJA vs. 182.9°C/W for DGK - slightly better thermal performance. | Same AEC-Q100 Grade 1 qualification and functional safety documentation; optimized for higher-power density layouts. | Select when board space constraints favor smaller footprint or thermal margin is critical in sealed enclosures. |
| TLV1702QDRQ1 | Lower supply current (55 µA vs. 600 µA), rail-to-rail input, but max supply = 36 V and offset = ±1.5 mV - less precision, higher speed (1.2 µs). | Not qualified for Grade 1 extended temp; rated only to +105°C - suitable for cabin electronics but not under-hood. | Choose for low-power infotainment or cluster applications where offset tolerance >1 mV is acceptable and ambient stays below 105°C. |
Compared with LM2903QDGKRQ1, LM2903QPWRQ1 offers marginal thermal improvement in same-function packaging, while TLV1702QDRQ1 trades precision and temperature grade for ultra-low quiescent current - making it viable only in non-critical, lower-temperature subsystems.
Availability
LM2903QDGKRQ1 is available at Aetrix Electronics and suitable for automotive HEV/EV powertrain monitoring, body control module voltage supervision, and infotainment system level translation requiring stable component supply across long production lifecycles.
Supply support for LM2903QDGKRQ1 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 and embedded processing solutions, with deep expertise in automotive-grade IC design, manufacturing, and functional safety compliance.
The LM2903-Q1 family was engineered specifically for automotive voltage comparison tasks - emphasizing robustness across extreme temperatures, high-voltage resilience, and AEC-Q100-aligned reliability for safety-critical subsystems.
FAQ
What is the maximum supply voltage supported by the LM2903QDGKRQ1?
The LM2903QDGKRQ1 supports a maximum supply voltage of 36 V, as confirmed in Section 2.2 Absolute Maximum Ratings of the official TI datasheet SLCS141M. This rating applies to the differential supply voltage (V+ − V−) and enables direct connection to 24 V and 36 V automotive battery rails without external regulation. Exceeding 36 V risks permanent damage.
Does the LM2903QDGKRQ1 have built-in ESD protection, and what level is specified?
Yes, the LM2903QDGKRQ1 features integrated ESD protection rated at 2 kV HBM (Human Body Model) and 1 kV CDM (Charged Device Model), per AEC-Q100-002 and AEC-Q100-011. This is explicitly documented in Section 2.4 of the TI datasheet SLCS141M and distinguishes the "B"-suffix variant (including LM2903QDGKRQ1) from earlier LM2903-Q1 versions with 1 kV HBM.
Can the LM2903QDGKRQ1 operate with inputs below ground potential?
No - the LM2903QDGKRQ1 does not support negative input voltages below GND. Per Section 2.9 Electrical Characteristics, the absolute minimum input voltage is –0.3 V. Inputs below this threshold risk forward-biasing internal ESD diodes and causing excessive current flow. The device's common-mode range starts at GND and extends upward to (VCC − 1.5 V).
Is the LM2903QDGKRQ1 pin-compatible with standard LM2903-Q1 variants in VSSOP-8 packages?
Yes, the LM2903QDGKRQ1 shares identical pinout, footprint, and electrical interface with other LM2903-Q1 family members in the DGK (VSSOP-8) package, including LM2903QPWRQ1 and LM2903QDRQ1. Pin functions - 1OUT, 1IN−, 1IN+, GND, 2IN+, 2IN−, 2OUT, VCC - are fully consistent across all VSSOP-8 variants per Figure 1-1 and Table 1-1 in the TI datasheet.
What is the typical quiescent current consumption of the LM2903QDGKRQ1 at 5 V supply?
The LM2903QDGKRQ1 draws 400 µA to 600 µA typical total quiescent current at 5 V supply and 25°C, as specified in Section 2.9 (IQ parameter). This value scales with supply voltage and remains below 800 µA across the full –40°C to +125°C operating range, supporting low-power always-on automotive monitoring functions.
LM2903QDGKRQ1 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 ~ 30V, ±1V ~ 15V
- :
- 7mV @ 5V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 6mA @ 5V
- Current - Output (Typ):
- 1mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- Automotive
- Grade:
- AEC-Q100
- Qualification:
- Surface Mount
- :
- 8-VSSOP
LM2903QDGKRQ1 FAQ
1.How can I place an order for LM2903QDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903QDGKRQ1 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 LM2903QDGKRQ1 reliable?
The price and inventory of LM2903QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903QDGKRQ1 is usually 5 days.
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4.How is shipping managed for LM2903QDGKRQ1?
LM2903QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903QDGKRQ1 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 LM2903QDGKRQ1?
For technical support, including LM2903QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903QDGKRQ1 requirements.
6.How does Aetrix verify that LM2903QDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All LM2903QDGKRQ1 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 LM2903QDGKRQ1 meets industry standards.
7.What is the process for return or replacement of LM2903QDGKRQ1?
All LM2903QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903QDGKRQ1, 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 LM2903QDGKRQ1 part is unused and in its original packaging.
Return procedure for LM2903QDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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