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Diodes Incorporated LM2903AQTH-13
- Part No.:
- LM2903AQTH-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Comparators
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM2903AQTH-13.pdf
- Description:
- IC COMPARATOR 2 DIFF 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,506
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Product details
Overview
LM2903AQTH-13 from Diodes Incorporated is an automotive-grade dual differential comparator with AEC-Q100 Grade 1 qualification, 1 mV typical input offset voltage (A-suffix), 2 V to 36 V single-supply operation, and open-collector outputs compatible with TTL/CMOS logic-used in battery monitoring, overvoltage protection, and window comparators in engine control units.
For engineers reviewing the LM2903AQTH-13 datasheet, LM2903AQTH-13 pinout, LM2903AQTH-13 application, or LM2903AQTH-13 equivalent, key selection criteria include input offset voltage tolerance, rail-to-rail common-mode range (0 V to VCC − 1.5 V), output sink capability (6–16 mA), and SO-8 package thermal resistance (150 °C/W).
Technical Context
This device implements two independent high-gain comparators with PNP input stages enabling ground-sensing inputs and common-mode voltage down to 0 V. Each channel features uncommitted NPN output transistors capable of sinking up to 16 mA, supporting wired-OR configurations and flexible pull-up voltage selection independent of VCC.
The internal bias network delivers supply-current independence across 2 V–36 V operation (0.6 mA typ. at 5 V), while differential input voltage tolerance extends to ±36 V-enabling direct interface with signals exceeding the supply rail without damage, provided negative excursions stay above −0.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | Single: 2 V to 36 V; dual: ±1.0 V to ±18 V - supports wide-input automotive battery monitoring and industrial power rails. |
| Input Offset Voltage | 1 mV (typ., A-suffix) - enables precise threshold detection in low-voltage sensing applications like 12 V battery state-of-charge. |
| Input Bias Current | 25 nA (typ.) - minimizes loading on high-impedance sensor sources such as thermistor dividers or photodiode amplifiers. |
| Output Sink Current | 6–16 mA - drives LEDs, relay coils, or logic gates directly without external buffers. |
| Common-Mode Range | 0 V to VCC − 1.5 V - allows ground-referenced input sensing in single-supply systems like automotive body controllers. |
| Response Time | 300 ns (large-signal, 100 mV step) - suitable for fast edge detection in motor phase commutation or PWM fault monitoring. |
| Operating Temp | −40 °C to +125 °C - qualified for under-hood and transmission-control module environments. |
Pinout & Package
LM2903AQTH-13 is housed in a lead-free, halogen-free SO-8 package (JEDEC MS-012AC), qualified to AEC-Q100 Grade 1 and manufactured in IATF 16949-certified facilities.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Channel 1 Output | Open-collector NPN emitter grounded; requires external pull-up to interface with TTL/CMOS or drive loads. |
| 2 | Channel 1 Inverting Input | Inverts signal polarity at output; used for threshold comparison against reference or feedback voltage. |
| 3 | Channel 1 Non-Inverting Input | Non-inverting input path; commonly tied to sensor signal in overvoltage detection circuits. |
| 4 | GND | Analog and power ground reference; must be low-impedance for stable common-mode rejection. |
| 5 | Channel 2 Non-Inverting Input | Independent second comparator input; enables dual-threshold or window-comparator top rail. |
| 6 | Channel 2 Inverting Input | Second comparator inverting input; used for bottom-rail reference in window detection schemes. |
| 7 | Channel 2 Output | Second open-collector output; can be wire-OR'd with Pin 1 for logical OR functionality. |
| 8 | VCC | Positive supply rail; powers both comparators and supports voltage translation via independent pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1, PPAP-capable, IATF 16949 manufacturing - meets OEM requirements for safety-critical ECUs. |
| Rail-to-ground input range | Common-mode voltage includes 0 V - eliminates need for level-shifting in battery voltage monitoring below 2 V. |
| Supply-independent current draw | 0.6 mA typ. at 5 V, unchanged up to 36 V - simplifies power budgeting across variable automotive battery conditions. |
| Overvoltage-tolerant inputs | Differential input rating of ±36 V - permits direct connection to 24 V or 42 V subsystems without external clamping. |
| Logic-compatible outputs | Output sinks 16 mA with <200 mV saturation at 4 mA - ensures reliable TTL/CMOS interfacing without additional drivers. |
Applications
| Battery State Monitoring | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Real-time monitoring of 12 V lead-acid battery voltage during engine start-stop cycles. IC Role / Device Role / Timing Role: Dual comparator configured as window detector to flag under-voltage (<10.5 V) and over-voltage (>14.8 V) conditions. Use Value: 1 mV offset ensures accurate 50 mV threshold resolution; rail-to-ground input enables direct sensing without bias resistors. | Use Scenario: Preventing damage to infotainment head-unit power supplies during load-dump transients. IC Role / Device Role / Timing Role: Fast-response comparator triggers MOSFET gate shutdown when input exceeds 16 V threshold. Use Value: 300 ns response time detects 12 V → 24 V spikes within 1 µs; ±36 V input tolerance survives ISO 7637-2 pulse 5a. |
| Motor Phase Detection | Window Comparator for Sensor Signal Validation |
Use Scenario: Zero-crossing detection in BLDC motor back-EMF for electronic commutation timing. IC Role / Device Role / Timing Role: One comparator channel compares phase voltage to mid-rail reference; second provides hysteresis. Use Value: 25 nA input bias avoids distortion of high-impedance RC-filtered back-EMF signals; open-collector outputs interface directly with MCU GPIO. | Use Scenario: Validating analog output of a Hall-effect position sensor in transmission control module. IC Role / Device Role / Timing Role: Dual comparator verifies signal stays within 0.8–4.2 V valid range, asserting fault flag if outside. Use Value: A-suffix 1 mV offset enables tight 100 mV guardband; −40 °C to +125 °C operation ensures reliability across gearbox temperature extremes. |
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 electrical specs, SO-8 package, non-A grade (2 mV offset) | Lower precision threshold detection; acceptable where 2 mV offset suffices | Select when cost sensitivity outweighs need for sub-2 mV accuracy in non-safety-critical functions. |
| TLV3702QDRQ1 | Rail-to-rail input, 1.8 V min supply, 350 µA supply current, push-pull output | Requires no pull-up resistor; unsuitable for wired-OR or mixed-voltage logic interfacing | Choose for ultra-low-power battery systems where open-collector flexibility is not required. |
Compared with LM2903AQTH-13, LM2903QDR trades 1 mV offset for lower cost in identical automotive-qualified packaging, while TLV3702QDRQ1 replaces open-collector versatility with rail-to-rail input and lower quiescent current-making it optimal only in low-voltage, low-power designs without wired-OR needs.
Availability
LM2903AQTH-13 is available at Aetrix Electronics and suitable for battery management systems, motor control modules, and automotive body electronics requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM2903AQTH-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/AQ series belongs to Diodes' automotive-qualified precision comparator product line, engineered specifically for robust, high-reliability voltage comparison in harsh-temperature vehicle subsystems.
FAQ
What is the maximum differential input voltage the LM2903AQTH-13 can withstand?
The LM2903AQTH-13 supports a differential input voltage of up to ±36 V, allowing direct connection to signals exceeding the supply rail-such as load-dump transients-without damage, provided negative input excursions remain above −0.3 V relative to GND.
Can the outputs be wired together for logical OR functionality?
Yes-the open-collector outputs support wired-OR configuration. Pins 1 and 7 (OUT1 and OUT2) can be connected to a shared pull-up resistor and node, enabling combined assertion of either comparator's active-low output, commonly used in fault-bus signaling.
Does the LM2903AQTH-13 require hysteresis for stable operation?
Hysteresis is recommended for noisy input signals or slow-rising edges to prevent multiple transitions during threshold crossing. The datasheet specifies that even 1–10 mV of positive feedback eliminates oscillation caused by stray capacitance between inputs and outputs.
Is the LM2903AQTH-13 compatible with 3.3 V logic systems?
Yes-its output can sink current into a 3.3 V pull-up, and its input common-mode range includes 0 V, enabling direct interface with 3.3 V microcontrollers. However, VCC must be ≥2 V; for pure 3.3 V systems, VCC = 3.3 V is valid and supported.
LM2903AQTH-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- 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:
- -
- 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-TSSOP
LM2903AQTH-13 FAQ
1.How can I place an order for LM2903AQTH-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903AQTH-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 LM2903AQTH-13 reliable?
The price and inventory of LM2903AQTH-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903AQTH-13 is usually 5 days.
3.What payment methods are accepted for LM2903AQTH-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903AQTH-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903AQTH-13?
LM2903AQTH-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903AQTH-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 LM2903AQTH-13?
For technical support, including LM2903AQTH-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903AQTH-13 requirements.
6.How does Aetrix verify that LM2903AQTH-13 is sourced from the original manufacturer or authorized distributors?
All LM2903AQTH-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 LM2903AQTH-13 meets industry standards.
7.What is the process for return or replacement of LM2903AQTH-13?
All LM2903AQTH-13 units undergo pre-shipment inspection (PSI). If there is an issue with LM2903AQTH-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 LM2903AQTH-13 part is unused and in its original packaging.
Return procedure for LM2903AQTH-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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