My Inquiry
My Account
Diodes Incorporated LM2903QS-13
- Part No.:
- LM2903QS-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2903QS-13.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:11,076
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2903QS-13 from Diodes Incorporated is an automotive-grade dual differential voltage comparator with AEC-Q100 Grade 1 qualification, 2V–36V single-supply operation, 2mV typical input offset voltage (non-A version), 0.6mA supply current at 5V, and open-collector outputs compatible with TTL/CMOS logic-used in battery monitoring circuits for electric powertrain control units.
For engineers reviewing the LM2903QS-13 datasheet, LM2903QS-13 pinout, LM2903QS-13 application, or LM2903QS-13 equivalent, key selection criteria include input common-mode range extending to ground, output sink capability up to 16mA, ±5nA input offset current, and SO-8 package compatibility with automotive PCB thermal cycling requirements.
Technical Context
The LM2903QS-13 implements two independent high-gain comparators with PNP input stages enabling rail-to-rail common-mode input voltage (0V to VCC−1.5V) and differential input tolerance up to 36V. Its uncommitted NPN output transistors support wired-OR configurations and flexible pull-up voltage selection independent of VCC.
Supply current remains stable across 2V–36V operation due to bias network design, and input bias current is constant (25nA typ) regardless of output state-eliminating dynamic loading on sensor signal paths. The device operates over −40°C to +125°C ambient temperature with junction temperature up to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 36V single supply - supports direct connection to 12V/24V automotive batteries without regulation. |
| Input Offset Voltage | 2mV typical (non-A) - enables accurate threshold detection in low-voltage battery cell monitoring. |
| Supply Current | 0.6mA at 5V - ensures minimal quiescent power draw in always-on vehicle subsystems. |
| Output Sink Current | 16mA max - drives LEDs, relays, or logic inputs directly without external buffers. |
| Input Bias Current | 25nA typical - minimizes error in high-impedance sensor interfaces like thermistor networks. |
| Common-Mode Range | 0V to VCC−1.5V - allows direct sensing of signals referenced to ground in single-supply systems. |
| Response Time | 300ns (100mV step, 5mV overdrive) - suitable for fast fault detection in motor control feedback loops. |
Pinout & Package
LM2903QS-13 is housed in a Pb-free, halogen-free SO-8 package (JEDEC MS-012AC) with 1.27mm pitch, qualified to AEC-Q100 Grade 1 and IATF16949 manufacturing standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Open-collector output of Comparator 1 - requires external pull-up for logic-high assertion. |
| 2 | IN1− | Inverting input of Comparator 1 - accepts signals down to −0.3V for fault margin. |
| 3 | IN1+ | Non-inverting input of Comparator 1 - used for reference or signal comparison. |
| 4 | GND | Analog ground reference - must be connected to system ground plane for noise immunity. |
| 5 | IN2+ | Non-inverting input of Comparator 2 - supports independent dual-threshold sensing. |
| 6 | IN2− | Inverting input of Comparator 2 - enables differential or window-comparator topologies. |
| 7 | OUT2 | Open-collector output of Comparator 2 - can be wire-OR'd with OUT1 for alarm consolidation. |
| 8 | VCC | Positive supply pin - powers both comparators and supports wide-range battery input. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | Operates from 2V to 36V - eliminates need for pre-regulation in 12V/24V/48V vehicle architectures. |
| Ground-Sensing Inputs | Common-mode range includes 0V - enables direct interface with shunt-based current sensors tied to ground. |
| Low Input Offset Current | ±5nA max - reduces mismatch error in precision resistor-divider reference networks. |
| Automotive Qualification | AEC-Q100 Grade 1 (−40°C to +125°C) - certified for engine bay and powertrain control module deployment. |
| ESD Robustness | 500V HBM - withstands handling and assembly stresses in automotive production environments. |
Applications
| Battery Cell Voltage Monitor | Motor Overcurrent Protection |
|---|---|
|
Use Scenario: Monitoring individual Li-ion cell voltages in EV battery packs to detect under-voltage or over-voltage conditions. IC Role / Device Role / Timing Role: Dual comparator compares each cell's voltage against upper/lower thresholds using resistor dividers; outputs drive fault latches or MCU interrupts. Use Value: 2mV offset enables ±10mV detection accuracy at 3.6V nominal cell voltage, supporting ISO 26262 ASIL-B functional safety requirements. |
Use Scenario: Detecting excessive current in BLDC motor phase legs via shunt resistor voltage drop. IC Role / Device Role / Timing Role: One comparator monitors shunt voltage against programmable trip level; second provides hysteresis to prevent chatter during transient spikes. Use Value: 300ns response time ensures <1µs fault reaction, meeting IEC 61800-5-2 safe torque off (STO) timing constraints. |
| Engine Coolant Level Sensor | Brake Fluid Pressure Threshold Detector |
|
Use Scenario: Interfacing with capacitive or resistive coolant level sensors to trigger low-level warnings. IC Role / Device Role / Timing Role: Comparator converts analog sensor output into clean digital signal for CAN bus transmission or dashboard indicator control. Use Value: 25nA input bias current prevents loading errors in high-impedance sensor bridges, maintaining ±1% level accuracy over lifetime. |
Use Scenario: Validating brake fluid pressure meets minimum operational threshold before vehicle start-up. IC Role / Device Role / Timing Role: Dual comparator forms window detector: one input checks lower limit, other verifies upper limit to confirm sensor integrity. Use Value: Independent channel operation allows simultaneous low/high threshold validation with single SO-8 footprint, reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2903DT | Same electrical specs, but TSSOP-8 package with 0.65mm pitch - higher board density but lower thermal mass. | Preferred for space-constrained ADAS ECUs where PCB real estate is critical. | Select when layout area is constrained and thermal derating is managed via copper pour. |
| TLV3702QDRQ1 | Rail-to-rail input, 360µA supply current, 1.8V–36V supply - lower power but 3.5mV offset voltage. | Suitable for ultra-low-power body control modules, not recommended for precision battery monitoring. | Choose only if supply current <400µA is mandatory and 1.5× offset tolerance is acceptable. |
Compared with LM2903DT, LM2903QS-13 offers superior thermal performance in SO-8 for under-hood applications; versus TLV3702QDRQ1, it delivers tighter offset and proven AEC-Q100 reliability at the cost of 50% higher quiescent current.
Availability
LM2903QS-13 is available at Aetrix Electronics and suitable for automotive battery management systems, motor control units, chassis electronics, and powertrain control modules requiring stable component supply across extended product lifecycles.
Supply support for LM2903QS-13 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
Diodes Incorporated is a global semiconductor manufacturer specializing in discrete, analog, and mixed-signal devices for automotive, industrial, and consumer markets.
The LM2903Q series belongs to Diodes' AEC-Q100-qualified analog portfolio, designed specifically for robust, high-reliability signal conditioning in automotive powertrain and chassis control systems.
FAQ
Can LM2903QS-13 operate with a 3.3V supply?
Yes. The LM2903QS-13 supports single-supply operation from 2V to 36V, including 3.3V logic domains. At 3.3V, supply current is approximately 0.55mA, input common-mode range extends from 0V to 1.8V, and output saturation voltage remains ≤200mV at 4mA sink load-enabling direct interfacing with 3.3V microcontrollers.
Does LM2903QS-13 require external hysteresis for stable operation?
Not inherently, but hysteresis is strongly recommended for slowly varying or noisy input signals. The device lacks internal hysteresis; adding 1–10mV positive feedback via resistor networks prevents oscillation during output transitions, especially in high-gain configurations like zero-crossing detectors or threshold alarms.
What is the maximum sink current per output of LM2903QS-13?
The absolute maximum sink current is 20mA per output, but the guaranteed specification is 16mA at VCC = 5V and TA = +25°C. At 16mA, saturation voltage rises to 400mV (max); for ≤200mV drop, limit sink current to 4mA. Thermal derating applies above +85°C ambient.
Is LM2903QS-13 pin-compatible with legacy LM2903 variants?
Yes. LM2903QS-13 uses the industry-standard SO-8 pinout defined for LM2903, matching LM2903D, LM2903DT, and LM2903DR. Pin functions (1=OUT1, 2=IN1−, 3=IN1+, 4=GND, 5=IN2+, 6=IN2−, 7=OUT2, 8=VCC) are identical-enabling drop-in replacement in existing designs with AEC-Q100 compliance upgrade.
LM2903QS-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- -
- Voltage - Supply, Single/Dual (±):
- 2V ~ 36V, ±1V ~ 18V
- :
- 7mV @ 5V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 16mA @ 5V
- Current - Output (Typ):
- 1.7mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- Automotive
- Grade:
- AEC-Q100
- Qualification:
- Surface Mount
- :
- 8-SO
LM2903QS-13 FAQ
1.How can I place an order for LM2903QS-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903QS-13 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 LM2903QS-13 reliable?
The price and inventory of LM2903QS-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903QS-13 is usually 5 days.
3.What payment methods are accepted for LM2903QS-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903QS-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903QS-13?
LM2903QS-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903QS-13 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 LM2903QS-13?
For technical support, including LM2903QS-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903QS-13 requirements.
6.How does Aetrix verify that LM2903QS-13 is sourced from the original manufacturer or authorized distributors?
All LM2903QS-13 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 LM2903QS-13 meets industry standards.
7.What is the process for return or replacement of LM2903QS-13?
All LM2903QS-13 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903QS-13, 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 LM2903QS-13 part is unused and in its original packaging.
Return procedure for LM2903QS-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2903QS-13 Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP USA Inc.
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
