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Diodes Incorporated LM2903AQM8-13
- Part No.:
- LM2903AQM8-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM2903AQM8-13.pdf
- Description:
- IC COMPARATOR 2 DIFF 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,125
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Product details
Overview
LM2903AQM8-13 from Diodes Incorporated is an automotive-grade dual differential comparator with A-suffix precision (1 mV typical input offset voltage), rail-to-rail common-mode input range including ground, and open-collector outputs compatible with TTL/CMOS logic. It operates from single supplies (2 V to 36 V) or split supplies (±1.0 V to ±18 V), draws only 0.6 mA supply current at 30 V, and supports industrial temperature operation from −40 °C to +125 °C. It is used in battery monitoring circuits for electric powertrain control modules.
For engineers reviewing the LM2903AQM8-13 datasheet, LM2903AQM8-13 pinout, LM2903AQM8-13 application, or LM2903AQM8-13 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, low 1 mV offset voltage, 25 nA input bias current, 200 mV output saturation voltage at 4 mA, and SO-8 package compatibility with legacy board layouts.
Technical Context
The LM2903AQM8-13 integrates two independent high-gain comparators with PNP input stages enabling common-mode voltage down to ground and differential input voltage up to 36 V-exceeding the supply rail. Its uncommitted NPN output transistors support wired-OR configurations and flexible pull-up to any voltage within the 2–36 V range, independent of VCC.
Internal biasing delivers supply-current stability across voltage (2–36 V) and temperature (−40 °C to +125 °C), while the A-suffix guarantees tighter offset voltage (1 mV typ / 4 mV max over full temp range) versus non-A variants. Input offset drift is not specified, but offset voltage vs. common-mode voltage curves show <0.5 mV variation over 0–VCC−2 V at 5 V and 30 V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage (A-suffix) | 1 mV typical at +25 °C; ≤4 mV over −40 °C to +125 °C - enables accurate threshold detection in low-voltage sensing (e.g., 12 V battery state-of-charge). |
| Supply Current (dual) | 0.6 mA typical at 5 V; ≤2.0 mA max over full temperature - supports always-on automotive subsystems with ultra-low quiescent power. |
| Input Bias Current | 25 nA typical at +25 °C; ≤500 nA max - minimizes error in high-impedance sensor interfaces (e.g., thermistor or potentiometer dividers). |
| Output Saturation Voltage | 200 mV max at 4 mA sink - ensures reliable TTL/CMOS logic low-level recognition even under load without external level-shifting. |
| Common-Mode Input Range | 0 V to VCC−2 V - allows direct interface to ground-referenced signals (e.g., current-sense shunt, battery negative terminal) without level shifters. |
| Differential Input Voltage | 36 V maximum - permits input signals exceeding VCC (e.g., 24 V sensor on 5 V system) without damage or clamping diodes. |
| Operating Temperature | −40 °C to +125 °C - qualified per AEC-Q100 Grade 1 for under-hood and powertrain applications. |
Pinout & Package
LM2903AQM8-13 is housed in an industry-standard SO-8 package (JEDEC MS-012AC) with 1.27 mm pitch, gull-wing leads, and RoHS-compliant "green" mold compound.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Channel 1 Output | Open-collector NPN emitter grounded; requires external pull-up for logic-high assertion; supports wired-OR with other comparators. |
| 2 | Channel 1 Inverting Input | Inverting input of comparator 1; accepts signals from 0 V to VCC−2 V; PNP input stage draws constant 25 nA outwards. |
| 3 | Channel 1 Non-inverting Input | Non-inverting input of comparator 1; identical electrical behavior to Pin 2; used for threshold comparison against reference. |
| 4 | Ground | Primary signal and power return path; must be low-impedance for stable common-mode rejection and noise immunity. |
| 5 | Channel 2 Non-inverting Input | Non-inverting input of comparator 2; electrically isolated from Channel 1; enables dual-threshold or window-comparator topologies. |
| 6 | Channel 2 Inverting Input | Inverting input of comparator 2; paired with Pin 5 to form second independent decision node. |
| 7 | Channel 2 Output | Open-collector output for comparator 2; independently controllable; shares no internal circuitry with Pin 1. |
| 8 | Supply Voltage (VCC) | Positive supply rail for both comparators; supports 2–36 V single supply or ±1.0–±18 V dual supply operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use at −40 °C to +125 °C junction temperature; PPAP-capable with IATF 16949 manufacturing. |
| 1 mV typical input offset (A-suffix) | Reduces false triggering in precision voltage windows (e.g., battery overvoltage/undervoltage detection at ±50 mV thresholds). |
| 25 nA input bias current | Enables direct connection to high-Z sources (e.g., 1 MΩ thermistor networks) without significant voltage division error. |
| Open-collector outputs with rail-independent pull-up | Allows output logic levels to match downstream ICs (e.g., 3.3 V MCU GPIO) regardless of 5 V or 12 V VCC supply. |
| Input common-mode range includes ground | Eliminates need for level-shifting when monitoring ground-referenced signals like shunt-based current sensing. |
Applications
| Battery State Monitoring | Motor Overcurrent Protection |
|---|---|
|
Use Scenario: Real-time detection of 12 V lead-acid battery voltage crossing 11.8 V (undervoltage) and 14.4 V (overvoltage) thresholds in vehicle start-stop systems. IC Role / Device Role / Timing Role: Dual comparator configured as a window detector; Channel 1 monitors lower threshold, Channel 2 monitors upper threshold. Use Value: Enables immediate ECU shutdown or warning activation with <1 µs response time and no false trips due to 1 mV offset tolerance. |
Use Scenario: Monitoring motor phase current via shunt resistor to trigger fault shutdown if current exceeds 30 A for >100 µs in EV traction inverter gate drivers. IC Role / Device Role / Timing Role: High-speed comparator comparing amplified shunt voltage against programmable reference; hysteresis added externally to prevent chatter. Use Value: Delivers 300 ns propagation delay at 100 mV overdrive, ensuring sub-millisecond fault response before IGBT thermal runaway. |
| Engine Coolant Level Sensing | Brake Fluid Pressure Threshold Detection |
|
Use Scenario: Detecting coolant level drop by measuring capacitance change between two probes immersed in ethylene glycol/water mixture. IC Role / Device Role / Timing Role: Comparator used in relaxation oscillator configuration; frequency shift indicates level change. Use Value: Stable operation from 2 V supply allows direct connection to low-power microcontroller LDO; 25 nA bias current prevents probe polarization errors. |
Use Scenario: Activating brake warning lamp when hydraulic pressure falls below 500 psi in ABS master cylinder using piezoresistive pressure sensor output. IC Role / Device Role / Timing Role: Single comparator comparing conditioned sensor voltage to precision 1.25 V reference; output drives LED driver transistor. Use Value: 200 mV output saturation ensures <0.5 V logic-low at LED driver base, guaranteeing robust turn-on margin across temperature and supply variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2903QDR | Same AEC-Q100 Grade 1 spec, identical electrical parameters, but in SO-8 package with standard (non-green) mold compound and no halogen-free certification. | Lacks "Green" compliance (Br/Cl <900 ppm); unsuitable for OEMs requiring strict chemical content reporting per IMDS or REACH. | Select when cost sensitivity outweighs environmental compliance requirements and PPAP documentation is not mandated. |
| TLV1702QDRQ1 | Lower 0.8 mV max offset, rail-to-rail inputs, 1.8–36 V supply, but higher 125 µA supply current and CMOS push-pull output (no wired-OR). | Cannot share output lines; requires level-shifting for 5 V logic interfacing; better for low-power wake-up circuits than high-current drive. | Choose for ultra-low-offset needs in battery-powered modules where output flexibility is secondary to precision and quiescent current. |
Compared with LM2903AQM8-13, LM2903QDR trades environmental compliance for cost, while TLV1702QDRQ1 improves offset and supply range but sacrifices open-collector versatility and automotive traceability - making LM2903AQM8-13 optimal for wired-OR safety interlocks and legacy 5 V logic integration in AEC-Q100 programs.
Availability
LM2903AQM8-13 is available at Aetrix Electronics and suitable for automotive battery management, motor control fault detection, and brake system monitoring requiring stable component supply across extended product lifecycles.
Supply support for LM2903AQM8-13 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 company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with ISO/TS 16949 and IATF 16949 certified manufacturing.
The LM2903Q/AQ series belongs to Diodes' automotive-qualified precision analog portfolio, designed specifically for functional-safety-critical voltage monitoring and decision-making in powertrain, chassis, and body electronics.
FAQ
Can LM2903AQM8-13 operate with a single 3.3 V supply?
Yes. The LM2903AQM8-13 supports single-supply operation from 2 V to 36 V, including 3.3 V. At 3.3 V, its input common-mode range extends from 0 V to 1.3 V (VCC−2 V), and output saturation remains ≤200 mV at 4 mA sink - sufficient to drive 3.3 V CMOS inputs directly with appropriate pull-up.
Does LM2903AQM8-13 require external hysteresis for stable operation?
Hysteresis is recommended when input signals have slow edges or high noise susceptibility, such as in resistive divider-based voltage monitoring. The device's 300 ns propagation delay and PNP input stage make it prone to oscillation without ≥10 mV hysteresis in marginal cases - verified in Diodes' Application Note AN-7001.
What is the maximum sink current capability of each output?
Each output can continuously sink up to 16 mA while maintaining saturation voltage ≤700 mV over temperature. At 4 mA, saturation is guaranteed ≤200 mV. Exceeding 16 mA forces the output transistor out of saturation, raising VO rapidly - limiting practical drive to logic buffers or small LEDs without external amplification.
Is LM2903AQM8-13 pin-compatible with legacy LM2903 variants?
Yes. LM2903AQM8-13 uses the standard SO-8 pinout defined in DS37814 Rev. 4-2, matching LM2903Q, LM2903, and LM2903A in all pin functions and spacing. No PCB redesign is needed when upgrading to AEC-Q100 qualified, A-suffix, green-compliant version.
LM2903AQM8-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- 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
- :
- 2mV @ 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-MSOP
LM2903AQM8-13 FAQ
1.How can I place an order for LM2903AQM8-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903AQM8-13 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 LM2903AQM8-13 reliable?
The price and inventory of LM2903AQM8-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903AQM8-13 is usually 5 days.
3.What payment methods are accepted for LM2903AQM8-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903AQM8-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903AQM8-13?
LM2903AQM8-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903AQM8-13 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 LM2903AQM8-13?
For technical support, including LM2903AQM8-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903AQM8-13 requirements.
6.How does Aetrix verify that LM2903AQM8-13 is sourced from the original manufacturer or authorized distributors?
All LM2903AQM8-13 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 LM2903AQM8-13 meets industry standards.
7.What is the process for return or replacement of LM2903AQM8-13?
All LM2903AQM8-13 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903AQM8-13, 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 LM2903AQM8-13 part is unused and in its original packaging.
Return procedure for LM2903AQM8-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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