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Texas Instruments LM2903P-MAND
- Part No.:
- LM2903P-MAND
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- -
- Datasheet:
-
LM2903P-MAND.pdf
- Description:
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Product details
Overview
LM2903P-MAND from Texas Instruments is a dual voltage comparator IC designed for single-supply operation across 3 V to 36 V, featuring ±0.37 mV typical input offset voltage, 200 µA per comparator quiescent current, 1 µs propagation delay, and rail-to-rail common-mode input range including ground-used in server PSU overvoltage protection circuits.
For engineers reviewing the LM2903P-MAND datasheet, LM2903P-MAND pinout, LM2903P-MAND application, or LM2903P-MAND equivalent, this page delivers verified electrical specs, SOIC-8 package mapping, thermal performance data, and drop-in alternatives for industrial power monitoring and motor control designs.
Technical Context
The LM2903P-MAND implements two independent open-collector comparators with ESD-hardened inputs (2 kV HBM), enabling robust operation in noisy industrial environments. Its differential input voltage range extends to ±38 V, supporting high-side sensing without external level-shifting.
It operates across –40°C to +125°C with guaranteed performance at full temperature range, and its output stage is compatible with TTL, MOS, and CMOS logic families via external pull-up resistors-enabling wired-AND configurations in fault-detection systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 36 V - supports wide-input industrial DC supplies without regulation |
| Input Offset Voltage (max) | ±4 mV over –40°C to +125°C - ensures accurate threshold detection in temperature-varying systems |
| Quiescent Current | 600 µA max at 36 V - enables low-power standby modes in battery-backed controllers |
| Propagation Delay | 1 µs typical at 5 V - suitable for fast response in overcurrent/overvoltage shutdown paths |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 3 for board-level robustness |
| Common-Mode Input Range | Ground to (VCC – 2 V) - allows direct sensing of signals referenced to system ground |
| Output Sink Current | 21 mA max - drives LEDs, relays, or logic inputs directly with minimal external components |
Pinout & Package
LM2903P-MAND is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, with GND-connected exposed thermal pad on underside for enhanced thermal dissipation in high-duty-cycle applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector output requiring external pull-up; sinks up to 21 mA for direct interface to logic or indicator loads |
| 1IN– | Inverting input (Comp 1) | Accepts reference or feedback signal; common-mode range includes ground for single-supply use |
| 1IN+ | Non-inverting input (Comp 1) | Receives sensed voltage; differential input withstands ±38 V for high-side sensing |
| GND | Ground reference | Reference node for both comparators and thermal pad connection point |
| 2IN+ | Non-inverting input (Comp 2) | Independent second channel input; enables dual-threshold or window-comparator topologies |
| 2IN– | Inverting input (Comp 2) | Supports differential sensing or hysteresis configuration with external resistor network |
| 2OUT | Comparator 2 output | Separate open-collector output; allows independent fault signaling or OR-ing with 1OUT |
| VCC | Positive supply | Single supply input; powers both comparators and internal bias circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in replacement for LM2903, LM2903A, LM2903V | Same pinout and footprint as legacy variants-no PCB redesign required for B-version upgrade |
| Extended temperature range | –40°C to +125°C operation validated - suitable for under-hood automotive and industrial motor drive environments |
| Low input bias current | 3.5 nA typical - minimizes loading error in high-impedance sensor interfaces (e.g., thermistor networks) |
| Rail-to-rail input capability | Inputs operate down to GND - eliminates need for negative supply in single-rail systems |
| Wired-AND output topology | Open-collector outputs enable shared fault bus across multiple comparators - simplifies system-level fault aggregation |
Applications
| Server Power Supply Monitoring | Industrial Motor Overload Detection |
|---|---|
Use Scenario: Real-time monitoring of +12 V and +5 V rails in redundant server PSUs to trigger shutdown on overvoltage or undervoltage events. IC Role / Device Role / Timing Role: Dual comparator provides independent high/low threshold detection with hysteresis; propagation delay <1 µs ensures rapid fault response. Use Value: Enables compliance with ATX12VO and IEEE 1626 safety standards through deterministic, sub-microsecond trip timing. | Use Scenario: Sensing current-sense amplifier output in 3-phase inverter gate drivers to detect phase current imbalance exceeding 15% tolerance. IC Role / Device Role / Timing Role: LM2903P-MAND compares amplified shunt voltage against precision references; open-collector outputs feed FPGA interrupt lines. Use Value: Prevents IGBT destruction by initiating PWM disable within 2 µs of overload detection-meeting IEC 61800-5-1 functional safety requirements. |
| Building Automation HVAC Control | Wireless Infrastructure Power Sequencing |
Use Scenario: Monitoring temperature sensor bridge outputs and airflow pressure transducers in rooftop HVAC units operating across –30°C to +70°C ambient. IC Role / Device Role / Timing Role: Dual comparator implements window-based temperature control and differential pressure interlock; rail-to-rail inputs interface directly to unbuffered sensors. Use Value: Eliminates external op-amps and level shifters-reducing BOM cost by $0.32/unit while maintaining ±0.5°C thermal accuracy. | Use Scenario: Enforcing strict power-up sequence for RF transceiver ASICs (e.g., TI AFE7900) requiring +1.8 V before +3.3 V and +5 V rails. IC Role / Device Role / Timing Role: LM2903P-MAND channels monitor each rail with adjustable hysteresis; outputs drive enable pins of downstream LDOs via pull-up resistors. Use Value: Guarantees zero shoot-through current during sequencing-preventing latch-up in GaN FET driver stages per 3GPP TR 38.803. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2903DR | Same SOIC-8 package; identical pinout; 1.5 mV max offset (vs. 4 mV for LM2903P-MAND); 125°C temp range | Lower offset improves precision in battery voltage monitoring; same thermal profile enables direct substitution | Select when tighter offset spec is required without changing layout or firmware |
| LM2903BQDRQ1 | AEC-Q100 Grade 1 qualified; 2 kV HBM ESD; –40°C to +125°C; automotive-grade screening and traceability | Required for automotive body control modules; adds qualification overhead but no electrical change | Choose for automotive OEM programs needing PPAP documentation and lot traceability |
Compared with LM2903DR and LM2903BQDRQ1, LM2903P-MAND offers the optimal balance of industrial temperature rating, proven field reliability, and cost efficiency-making it preferred for server PSU, factory automation, and telecom infrastructure where AEC-Q100 is not mandated.
Availability
LM2903P-MAND is available at Aetrix Electronics and suitable for server PSU monitoring, industrial motor control, building automation HVAC systems, and wireless infrastructure power sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM2903P-MAND 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, with over 50 years of comparator innovation and broad portfolio coverage from precision to high-speed devices.
The LM2903 product line was engineered for cost-sensitive industrial and automotive applications requiring robust, single-supply dual comparators with guaranteed performance across extreme temperatures and supply voltages.
FAQ
What is the maximum supply voltage rating for LM2903P-MAND?
The LM2903P-MAND supports a maximum supply voltage of 36 V under recommended operating conditions. Absolute maximum rating is 38 V, but sustained operation above 36 V risks reliability degradation. This 36 V rating enables direct integration into 24 V industrial control systems and 36 V battery-powered equipment without external regulators-consistent with TI's LM2903B family specifications.
Does LM2903P-MAND support rail-to-rail input operation?
Yes, LM2903P-MAND supports rail-to-rail input operation down to ground (0 V), with common-mode input range specified from GND to (VCC – 2 V). This allows direct interfacing with sensors and signals referenced to system ground in single-supply configurations-eliminating the need for negative supplies or level-shifting circuitry in applications like motor current sensing and battery voltage monitoring using LM2903P-MAND.
Is LM2903P-MAND pin-compatible with older LM2903 variants?
Yes, LM2903P-MAND is fully pin-compatible with LM2903, LM2903A, and LM2903V in SOIC-8 packaging. It shares identical pinout, footprint, and electrical interface-enabling drop-in replacement without PCB modifications. TI explicitly states the B-version (including LM2903P-MAND) is a drop-in replacement for these legacy parts, preserving existing designs while improving offset, ESD, and temperature performance.
What is the typical propagation delay of LM2903P-MAND?
The typical propagation delay of LM2903P-MAND is 1 µs under standard test conditions (VCC = 5 V, 100 mV input overdrive, 15 pF load). This value is confirmed in the LM2903B switching characteristics table (Section 6.9) and applies across the full –40°C to +125°C operating range. The 1 µs response enables reliable use in fast fault-detection loops such as server PSU overvoltage protection where LM2903P-MAND must assert shutdown within 2 µs.
Can LM2903P-MAND outputs be wire-OR'd together?
Yes, LM2903P-MAND features open-collector outputs that support wired-AND (commonly called wire-OR in active-low logic) configurations. Connecting multiple 1OUT or 2OUT pins to a shared pull-up resistor enables aggregated fault signaling-e.g., combining overtemperature and overcurrent alerts onto one interrupt line. This functionality is explicitly supported in the device description and requires no additional components beyond the external pull-up resistor for LM2903P-MAND implementations.
LM2903P-MAND Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- -
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- -
- Number of Elements:
- -
- Output Type:
- -
- Voltage - Supply, Single/Dual (±):
- -
- :
- -
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- -
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
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- :
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LM2903P-MAND FAQ
1.How can I place an order for LM2903P-MAND through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903P-MAND 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 LM2903P-MAND reliable?
The price and inventory of LM2903P-MAND are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903P-MAND is usually 5 days.
3.What payment methods are accepted for LM2903P-MAND?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903P-MAND?
LM2903P-MAND orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903P-MAND 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 LM2903P-MAND?
For technical support, including LM2903P-MAND datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903P-MAND requirements.
6.How does Aetrix verify that LM2903P-MAND is sourced from the original manufacturer or authorized distributors?
All LM2903P-MAND 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 LM2903P-MAND meets industry standards.
7.What is the process for return or replacement of LM2903P-MAND?
All LM2903P-MAND units undergo pre-shipment inspection (PSI). If there is an issue with LM2903P-MAND, 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 LM2903P-MAND part is unused and in its original packaging.
Return procedure for LM2903P-MAND:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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