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Texas Instruments LM2903DR-S
- Part No.:
- LM2903DR-S
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2903DR-S.pdf
- Description:
- PROTOTYPE
- Quantity:
- Payment:
- Shipping:
Inventory:1,710
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Product details
Overview
LM2903DR-S from Texas Instruments is an AEC-Q100 Grade 1 qualified dual voltage comparator designed for automotive and industrial systems requiring robust, wide-supply operation. It delivers ±0.37 mV typical input offset voltage, 200 µA typical supply current per comparator, and operates from 2 V to 36 V single or dual supplies - enabling use in battery monitoring, power rail supervision, and HEV/EV body control modules.
For engineers reviewing the LM2903DR-S datasheet, LM2903DR-S pinout, LM2903DR-S application, or LM2903DR-S equivalent, this page provides verified technical context, exact pin functions, automotive-grade thermal and ESD specifications (2 kV HBM), and validated alternative options for functional replacement in safety-critical designs.
Technical Context
The LM2903DR-S implements two independent open-drain comparators with PNP Darlington input stages, supporting common-mode input down to ground and differential input up to ±36 V. Its internal bias architecture enables stable operation across –40°C to +125°C ambient while maintaining low input bias current (3.5 nA typ) and fast propagation delay (300 ns typ at TTL-level overdrive).
Each comparator features a clamped input stage (Q15) that forces output low when inputs exceed VCM range, and an NPN open-drain output capable of sinking 21 mA at 5 V supply. The device supports wired-AND logic via external pull-up and requires no level-shifting circuitry for interfacing with 3.3 V or 5 V MCUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports direct connection to 12 V/24 V automotive batteries and industrial rails without regulation |
| Input Offset Voltage (typ) | ±0.37 mV - enables precise threshold detection in battery cell voltage monitoring and sensor signal conditioning |
| Supply Current (per comp) | 200 µA typical at 5 V - allows always-on operation in low-power wake-up circuits with minimal quiescent drain |
| Input Bias Current (typ) | 3.5 nA - minimizes error in high-impedance reference divider networks and thermistor interfaces |
| Propagation Delay (H→L) | 300 ns typical at TTL overdrive - suitable for real-time fault detection in motor control and DC-DC converter protection |
| ESD Rating (HBM) | 2 kV - meets AEC-Q100 stress requirements for assembly and in-vehicle environments |
| Operating Temperature | –40°C to +125°C ambient - qualified for engine bay, powertrain, and infotainment module deployment |
Pinout & Package
LM2903DR-S is supplied in an SOIC-8 (D) package measuring 4.90 mm × 3.91 mm, with standard pinout compatible across LM2903-Q1 family variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-drain NPN sink - requires external pull-up to define logic-high level; supports wired-AND and level shifting |
| 1IN− | Comparator 1 inverting input | High-impedance PNP Darlington input - accepts signals down to GND; common-mode range extends to VCC − 1.5 V |
| 1IN+ | Comparator 1 non-inverting input | Same input structure as 1IN−; may exceed VCC without damage (up to 36 V) |
| GND | Ground reference | Common return for supply, inputs, and output pull-up; must be low-impedance for noise immunity |
| VCC | Positive supply | Single-supply pin accepting 2 V–36 V; dual-supply operation supported if V+ − V− ∈ [2 V, 36 V] |
| 2OUT | Comparator 2 output | Independent open-drain output - electrically isolated from 1OUT; enables dual-threshold or window-comparator topologies |
| 2IN− | Comparator 2 inverting input | Functionally identical to 1IN−; supports differential sensing or independent signal comparison |
| 2IN+ | Comparator 2 non-inverting input | Matches 1IN+ behavior; allows simultaneous evaluation of two independent analog conditions |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from –40°C to +125°C ambient, including HBM 2 kV / CDM 1 kV ESD robustness |
| Wide supply range (2 V–36 V) | Eliminates need for local LDOs in 12 V/24 V systems; supports direct battery monitoring and rail supervision |
| Open-drain outputs | Enables flexible logic-level translation and wired-AND functionality without additional discrete components |
| Input common-mode to GND | Allows direct interface with sensors, resistive dividers, and low-side current sense amplifiers |
| Low input offset drift | ±4 mV max over temperature - ensures stable trip points in thermal management and overvoltage protection circuits |
Applications
| Battery Management System | Power Rail Supervision |
|---|---|
Use Scenario: Monitoring individual Li-ion cell voltages in 48 V mild-hybrid battery packs to detect overvoltage and undervoltage faults. IC Role / Device Role / Timing Role: Dual comparator performs independent high- and low-threshold comparison on each cell's voltage, generating fault flags via open-drain outputs. Use Value: ±0.37 mV offset and 3.5 nA input bias minimize measurement error in high-impedance voltage dividers, improving SOC accuracy. | Use Scenario: Validating startup sequence and continuous health of 5 V, 3.3 V, and 1.8 V rails in automotive ADAS domain controllers. IC Role / Device Role / Timing Role: Each comparator compares a regulated rail against a precision reference to assert reset or alert signals. Use Value: 2 V–36 V supply range allows direct monitoring of unregulated 12 V input and post-LDO rails using shared VCC. |
| Motor Control Protection | Infotainment Power Sequencing |
Use Scenario: Detecting phase current imbalance and overcurrent in BLDC motor drivers by comparing sensed currents against thresholds. IC Role / Device Role / Timing Role: Comparator 1 monitors high-side current sense; Comparator 2 monitors low-side - both trigger shutdown within 300 ns. Use Value: 300 ns propagation delay ensures sub-microsecond response to fault conditions, preventing IGBT latch-up. | Use Scenario: Enforcing strict power-up and power-down order for display, audio codec, and processor subsystems in digital clusters. IC Role / Device Role / Timing Role: Dual comparators monitor enable signals and rail voltages to gate subsequent power stages via open-drain outputs. Use Value: Open-drain outputs allow direct connection to enable pins of multiple PMICs, eliminating external logic gates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2903QPWRQ1 | TSSOP-8 package (3.00 mm × 4.40 mm); identical electrical specs and AEC-Q100 Grade 1 qualification | Smaller footprint and improved thermal resistance (RθJA = 182.9°C/W vs. 154.1°C/W) - preferred for space-constrained PCB layouts | Select when board area is constrained and thermal performance under sustained load is critical. |
| TLV1702QDRQ1 | Rail-to-rail input, 1.8 V–36 V supply, 350 µA IQ, 1.2 µs response - lower offset (±0.75 mV) but higher current and slower speed | Supports lower-voltage MCU interfaces (1.8 V logic) and offers rail-to-rail input - suited for mixed-signal SoC companion circuits | Choose when interfacing with 1.8 V or 2.5 V logic and input signals near supply rails are required. |
Compared with LM2903DR-S, LM2903QPWRQ1 offers identical functionality in a smaller TSSOP package for denser layouts, while TLV1702QDRQ1 trades speed and quiescent current for rail-to-rail input capability and lower-voltage compatibility - making it suitable for next-generation low-power domains where LM2903DR-S's 300 ns response is unnecessary.
Availability
LM2903DR-S is available at Aetrix Electronics and suitable for automotive battery management, power rail supervision, and motor control protection requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LM2903DR-S 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 for automotive, industrial, and personal electronics markets.
The LM2903-Q1 family was engineered specifically for automotive-grade reliability, targeting HEV/EV powertrain, body electronics, and infotainment systems where AEC-Q100 compliance, wide supply tolerance, and robust ESD performance are mandatory.
FAQ
What is the maximum supply voltage rating for LM2903DR-S?
The LM2903DR-S supports a maximum supply voltage of 36 V on the VCC pin. Absolute maximum ratings specify VS = (V+) – (V−) ≤ 38 V for LM2903B-Q1 variants, but LM2903DR-S - as a standard LM2903-Q1 derivative - is rated for 36 V per the datasheet's Recommended Operating Conditions and Absolute Maximum Ratings tables. Operation beyond 36 V risks permanent damage.
Does LM2903DR-S support dual-supply operation?
Yes, LM2903DR-S supports dual-supply operation provided the difference between V+ and V− is within 2 V to 36 V, and V+ is at least 1.5 V more positive than the input common-mode voltage. This configuration enables bipolar signal comparison in industrial sensor interfaces, though the device is most commonly used in single-supply automotive applications.
What is the input common-mode voltage range of LM2903DR-S?
The input common-mode voltage range of LM2903DR-S extends from ground (0 V) to VCC − 1.5 V at 25°C, and to VCC − 2.0 V across the full –40°C to +125°C operating range. Inputs may safely exceed VCC up to 36 V due to internal clamping, but accurate comparison is only guaranteed within the specified common-mode window.
Can LM2903DR-S outputs be wire-OR'd together?
Yes, LM2903DR-S features open-drain outputs that can be directly connected to a shared pull-up resistor - enabling wired-AND logic. This is commonly used to combine fault signals from multiple subsystems (e.g., battery overvoltage AND motor overtemperature) into a single system alert line without additional logic gates.
Is LM2903DR-S pin-compatible with legacy LM2903 variants?
Yes, LM2903DR-S uses the standard SOIC-8 (D) package with identical pinout to all LM2903-Q1, LM2903B-Q1, and industrial LM2903 variants. It is a drop-in replacement for LM2903D, LM2903DR, and LM2903DRE4 in automotive designs, retaining full functional and mechanical compatibility while adding AEC-Q100 qualification.
LM2903DR-S Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Bulk
- 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 (Min)
- Current - Output (Typ):
- 1mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 300ns (Typ)
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C (TA)
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM2903DR-S FAQ
1.How can I place an order for LM2903DR-S through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903DR-S 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 LM2903DR-S reliable?
The price and inventory of LM2903DR-S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903DR-S is usually 5 days.
3.What payment methods are accepted for LM2903DR-S?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903DR-S transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903DR-S?
LM2903DR-S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903DR-S 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 LM2903DR-S?
For technical support, including LM2903DR-S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903DR-S requirements.
6.How does Aetrix verify that LM2903DR-S is sourced from the original manufacturer or authorized distributors?
All LM2903DR-S 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 LM2903DR-S meets industry standards.
7.What is the process for return or replacement of LM2903DR-S?
All LM2903DR-S units undergo pre-shipment inspection (PSI). If there is an issue with LM2903DR-S, 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 LM2903DR-S part is unused and in its original packaging.
Return procedure for LM2903DR-S:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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