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Texas Instruments LM2903QPWRQ1
- Part No.:
- LM2903QPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2903QPWRQ1.pdf
- Description:
- IC COMPARATOR 2 DIFF 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,655
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Product details
Overview
LM2903QPWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified dual open-drain comparator designed for automotive voltage monitoring and level-shifting applications. It operates from 2 V to 36 V single supply (or ±18 V dual supply), delivers ±0.37 mV typical input offset voltage, 3.5 nA typical input bias current, and 1 µs typical propagation delay - enabling precise threshold detection in HEV/EV powertrain and body control modules.
For engineers reviewing the LM2903QPWRQ1 datasheet, LM2903QPWRQ1 pinout, LM2903QPWRQ1 application, or LM2903QPWRQ1 equivalent, this page provides verified package mapping (TSSOP-8), confirmed pin functions, automotive-grade thermal and ESD specs (2 kV HBM), and validated alternatives for functional replacement in safety-critical designs.
Technical Context
The LM2903QPWRQ1 implements a PNP Darlington-pair input stage enabling rail-to-rail common-mode operation down to ground and up to VCC − 1.5 V, with internal clamping (Q15) ensuring valid output when inputs exceed VCM range. Its open-drain NPN output supports wired-AND logic and flexible pull-up voltage selection independent of VCC.
It features dedicated on-die ESD protection on all pins (2 kV HBM / 1 kV CDM), tri-temp tested options, and guaranteed operation across −40°C to +125°C ambient - meeting functional safety requirements for ASIL-B–capable systems via documented safety analysis support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V single supply - supports direct connection to 12 V/24 V automotive batteries and wide-input industrial rails without regulation. |
| Input Offset Voltage (typ) | ±0.37 mV at 25°C - enables accurate window-comparison within ≤10 mV thresholds for battery cell monitoring or overvoltage lockout. |
| Input Bias Current (typ) | 3.5 nA - minimizes loading on high-impedance sensor references (e.g., thermistor dividers or precision voltage references). |
| Propagation Delay (typ) | 1 µs at 5 V with 100 mV overdrive - ensures timely response for fast fault detection in motor control or DC-DC supervision. |
| ESD Rating (HBM) | 2 kV - exceeds AEC-Q100 Class H1C requirement, reducing field failure risk in assembly and end-use environments. |
| Output Configuration | Open-drain NPN - allows level translation to 1.8 V/3.3 V/5 V logic domains and wired-AND bus interfacing with multiple comparators. |
| Operating Temperature | −40°C to +125°C ambient - qualified for Grade 1 automotive use in engine bay, powertrain, and infotainment systems. |
Pinout & Package
TSSOP-8 package (3.00 mm × 4.40 mm body size) with exposed thermal pad connected directly to GND for enhanced thermal dissipation in high-ambient automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-drain NPN collector - requires external pull-up; sinks current when IN+ < IN− + VIO. |
| 1IN− | Comparator 1 inverting input | High-impedance PNP Darlington base - accepts signals from ground up to VCC − 1.5 V. |
| 1IN+ | Comparator 1 non-inverting input | Same high-Z input as 1IN−; supports differential or single-ended sensing configurations. |
| GND | Ground reference | Common return for supply, inputs, and thermal pad - must be low-impedance plane for noise immunity. |
| 2IN+ | Comparator 2 non-inverting input | Independent input stage identical to 1IN+; enables dual-threshold or hysteresis implementation. |
| 2IN− | Comparator 2 inverting input | Independent input stage identical to 1IN−; supports fully decoupled dual-comparator operation. |
| 2OUT | Comparator 2 output | Open-drain output electrically isolated from 1OUT - supports independent pull-up voltages per channel. |
| VCC | Positive supply | Single-supply rail powering both comparators; tolerant of transients up to 38 V (abs max). |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Includes ground and extends to VCC − 1.5 V - enables direct sensing of battery voltage, sensor outputs, and low-side current shunts without level shifting. |
| Dual independent comparators | Two functionally isolated channels in one TSSOP-8 package - reduces BOM count and PCB area vs. discrete solutions in window-detect or dual-threshold circuits. |
| Automotive qualification | AEC-Q100 Grade 1 (−40°C to +125°C) with documented functional safety support - meets OEM requirements for powertrain and ADAS subsystems. |
| Enhanced ESD robustness | 2 kV HBM / 1 kV CDM on all pins - eliminates need for external TVS diodes in many board-level ESD test scenarios. |
| Low quiescent current | 600 µA typical total supply current at 5 V - enables always-on monitoring in low-power vehicle modules without compromising battery life. |
Applications
| Overvoltage Protection Circuit | Battery Cell Balancing Monitor |
|---|---|
Use Scenario: Detecting battery pack voltage exceeding 4.25 V per cell to trigger balancing FET activation. IC Role / Device Role / Timing Role: Dual comparator compares cell voltage against precision reference and hysteresis band; open-drain outputs drive MOSFET gate drivers. Use Value: ±0.37 mV offset and 1 µs response ensure accurate, fast trip timing - preventing lithium-ion overcharge while avoiding nuisance shutdowns. | Use Scenario: Monitoring individual LiFePO₄ cell voltages (2.5–3.65 V range) in 12S BMS stacks. IC Role / Device Role / Timing Role: One comparator detects under-voltage (UVLO), the other detects over-voltage (OVLO); outputs feed microcontroller GPIOs. Use Value: Rail-to-rail input range down to ground enables direct connection to cell taps without op-amp buffers - reducing component count and error sources. |
| Engine Coolant Temperature Threshold | Infotainment Display Backlight Enable |
Use Scenario: Activating cooling fan control when coolant temperature exceeds 105°C, using NTC thermistor divider. IC Role / Device Role / Timing Role: Comparator compares thermistor voltage against fixed reference; output drives relay driver IC. Use Value: 3.5 nA input bias current prevents measurement error in high-resistance NTC networks - maintaining ±1°C accuracy across full temperature range. | Use Scenario: Enabling LED backlight only when display supply voltage remains above 4.75 V during cold cranking. IC Role / Device Role / Timing Role: Comparator monitors 5 V rail against 4.75 V reference; open-drain output pulls enable line low upon undervoltage. Use Value: 36 V absolute max supply rating tolerates load-dump transients up to 38 V - eliminating need for upstream TVS in infotainment head units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2903QDRQ1 | SOIC-8 package (4.90 mm × 3.91 mm); identical electrical specs and AEC-Q100 Grade 1 qualification. | Larger footprint; better thermal mass but higher parasitic capacitance - preferred for prototyping or legacy board compatibility. | Select when board layout accommodates SOIC or thermal performance outweighs space constraints. |
| TLV1701QDBVRQ1 | Single-channel, rail-to-rail input/output, 36 V supply, 0.9 mV max offset, 1.2 µs propagation delay - lower power (55 µA), no open-drain output. | Requires two devices for dual functionality; push-pull output limits level-shifting flexibility but improves rise time. | Select when ultra-low IQ is critical and push-pull logic interface suffices - not drop-in compatible. |
Compared with LM2903QPWRQ1, LM2903QDRQ1 offers identical performance in a larger SOIC package ideal for manual assembly or thermal-heavy environments, while TLV1701QDBVRQ1 trades open-drain flexibility and dual-channel integration for 90% lower quiescent current and rail-to-rail output swing - requiring redesign for wired-AND or multi-voltage logic interfacing.
Availability
LM2903QPWRQ1 is available at Aetrix Electronics and suitable for automotive powertrain control, body electronics, and infotainment systems requiring stable component supply across extended production lifecycles.
Supply support for LM2903QPWRQ1 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, embedded processing, and connectivity technologies for automotive, industrial, and consumer markets.
The LM2903-Q1 family was engineered specifically for automotive voltage comparison tasks - emphasizing AEC-Q100 reliability, wide supply tolerance, and open-drain interoperability in harsh-temperature, high-transient environments.
FAQ
What is the maximum supply voltage rating for LM2903QPWRQ1?
The LM2903QPWRQ1 has an absolute maximum supply voltage of 38 V, with recommended operation up to 36 V. This rating applies to the difference between VCC and GND pins and enables direct connection to 24 V automotive systems and transient-tolerant designs. Exceeding 38 V risks permanent damage per TI's Absolute Maximum Ratings table.
Does LM2903QPWRQ1 support dual-supply operation?
Yes, LM2903QPWRQ1 supports dual-supply operation as long as 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 allows bipolar signal conditioning in industrial sensor interfaces while maintaining full AEC-Q100 qualification.
Is LM2903QPWRQ1 pin-compatible with standard LM2903 variants?
LM2903QPWRQ1 shares identical pinout with all LM2903-Q1 family members in TSSOP-8 (PW) package, including LM2903QDRQ1 (SOIC), LM2903QDGKRQ1 (VSSOP), and LM2903QBDRQ1 (SOIC). Pin functions, spacing, and thermal pad connection are consistent across qualified variants - enabling direct PCB footprint reuse.
What is the input common-mode voltage range of LM2903QPWRQ1?
The input common-mode voltage range of LM2903QPWRQ1 spans from ground to VCC − 1.5 V at 25°C, extending to VCC − 2.0 V across −40°C to +125°C. This allows direct sensing of signals referenced to system ground - such as battery voltage or current-shunt outputs - without level-shifting circuitry.
Can LM2903QPWRQ1 outputs be wire-OR'd together?
Yes, LM2903QPWRQ1 features open-drain NPN outputs that can be externally tied together with a shared pull-up resistor to implement wired-AND logic. This is commonly used in fault-bus architectures where multiple comparators assert a single system alert line - provided each output's sink current remains within 25 mA absolute maximum rating.
LM2903QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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 @ 5V
- 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:
- Automotive
- Grade:
- AEC-Q100
- Qualification:
- Surface Mount
- :
- 8-TSSOP
LM2903QPWRQ1 FAQ
1.How can I place an order for LM2903QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903QPWRQ1 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 LM2903QPWRQ1 reliable?
The price and inventory of LM2903QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903QPWRQ1 is usually 5 days.
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4.How is shipping managed for LM2903QPWRQ1?
LM2903QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903QPWRQ1 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 LM2903QPWRQ1?
For technical support, including LM2903QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903QPWRQ1 requirements.
6.How does Aetrix verify that LM2903QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All LM2903QPWRQ1 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 LM2903QPWRQ1 meets industry standards.
7.What is the process for return or replacement of LM2903QPWRQ1?
All LM2903QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903QPWRQ1, 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 LM2903QPWRQ1 part is unused and in its original packaging.
Return procedure for LM2903QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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