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Texas Instruments LM2903BIDDFR
- Part No.:
- LM2903BIDDFR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LM2903BIDDFR.pdf
- Description:
- IC COMPARATOR 2 GEN PUR TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:81,904
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Product details
Overview
LM2903BIDDFR from Texas Instruments is a dual precision comparator IC designed for single-supply operation across 2–36 V, featuring ±0.37 mV typical input offset voltage, 200 µA per comparator quiescent current, 1 µs propagation delay, and rail-to-rail input capability including ground. It serves as a high-reliability voltage decision element in industrial power supply monitoring and motor control feedback loops.
For engineers reviewing the LM2903BIDDFR datasheet, LM2903BIDDFR pinout, LM2903BIDDFR application, or LM2903BIDDFR equivalent, this page delivers verified electrical specs, thermal performance data, package-specific pin functions, real-world use cases in server PSUs and factory automation, and two validated alternative parts with documented functional trade-offs.
Technical Context
The LM2903BIDDFR implements open-collector output architecture with independent dual comparators, supporting wide common-mode input range (–0.1 V to VCC – 2 V) and differential input voltage tolerance up to ±38 V. Its internal ESD clamps provide 2 kV HBM robustness without external protection.
Designed for direct replacement of legacy LM2903 variants, it maintains identical SOIC-8 pinout while improving offset voltage (±4 mV max over temperature), supply current (600 µA typ at 5 V), and response time (1 µs typ) - all validated across –40°C to +125°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports wide-input industrial and automotive power rails without external regulation |
| Input Offset Voltage | ±0.37 mV typ (±4 mV max over –40°C to +125°C) - enables accurate threshold detection in low-voltage sensing |
| Quiescent Current | 600 µA typ at 5 V - allows battery-backed or energy-sensitive designs with dual-comparator functionality |
| Propagation Delay | 1 µs typ at 5 V - ensures timely response in overvoltage/undervoltage lockout circuits |
| Input Bias Current | 3.5 nA typ - minimizes loading on high-impedance sensor sources like thermistors or photodiodes |
| Output Sink Current | 21 mA min - drives standard TTL, CMOS, or discrete MOSFET gate logic directly |
| ESD Rating (HBM) | 2000 V - meets industrial handling requirements without additional board-level protection |
Pinout & Package
SOT-23-8 (DDF) package: 2.90 mm × 1.60 mm body, exposed pad connected to GND for thermal and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Comparator 1 output | Open-collector drain - requires external pull-up; sinks up to 21 mA |
| 1IN− | Comparator 1 inverting input | Differential input node; accepts voltages down to –0.1 V (below GND) |
| 1IN+ | Comparator 1 non-inverting input | Differential input node; supports rail-to-rail common-mode range |
| GND | Ground reference | Power and signal return; connects to exposed thermal pad |
| 2IN+ | Comparator 2 non-inverting input | Independent input; shares same voltage range and bias specs as 1IN+ |
| 2IN− | Comparator 2 inverting input | Independent input; supports full differential range up to ±38 V |
| 2OUT | Comparator 2 output | Open-collector drain - electrically isolated from 1OUT; identical sink capability |
| VCC | Positive supply | Single supply input; powers both comparators; max 36 V absolute rating |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input including ground | Enables direct sensing of 0 V referenced signals (e.g., current-sense shunts, battery terminals) |
| ±38 V differential input rating | Allows safe comparison of signals across large potential differences without clamping diodes |
| 2 kV HBM ESD protection | Eliminates need for external ESD components in assembly-line or field-deployed systems |
| Drop-in replacement for LM2903/LM393 | Preserves existing PCB layout and firmware while upgrading offset, speed, and supply range |
| –40°C to +125°C operation | Qualified for under-hood automotive, industrial motor drives, and telecom infrastructure environments |
Applications
| Overvoltage Protection Circuit | Motor Phase Monitoring |
|---|---|
Use Scenario: Detecting DC bus voltage exceeding 30 V in a server PSU to trigger shutdown before capacitor failure. IC Role / Device Role / Timing Role: Dual comparator compares scaled bus voltage against precision reference; one channel for OV, second for UV lockout. Use Value: ±0.37 mV offset ensures <±10 mV total error at 30 V sense point, enabling tight safety margins. | Use Scenario: Monitoring back-EMF zero-crossing in BLDC motor commutation for sensorless control. IC Role / Device Role / Timing Role: Comparator detects polarity reversal of phase-to-phase voltage; fast 1 µs response enables precise timing alignment. Use Value: 1 µs propagation delay reduces commutation jitter by >30% vs. legacy LM2903 (1.3 µs), improving torque ripple. |
| Factory Automation Sensor Interface | Wireless Infrastructure Power Sequencing |
Use Scenario: Converting analog outputs from pressure/temperature transducers into digital status flags for PLC input modules. IC Role / Device Role / Timing Role: Dual comparator provides high/low threshold detection with hysteresis; open-collector outputs interface directly to 24 V PLC inputs. Use Value: 3.5 nA input bias current prevents loading of high-Z transducer outputs, preserving accuracy over temperature. | Use Scenario: Enabling multi-rail power sequencing in 5G base station RF front-end modules with strict ramp-up order. IC Role / Device Role / Timing Role: One comparator monitors VDD1 reaching threshold to enable next stage; second verifies clean reset release. Use Value: 2–36 V supply range allows direct monitoring of 3.3 V, 12 V, and 24 V rails without level-shifting circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual open-collector comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2903DR | Legacy A-version; ±15 mV max offset, 1.3 µs response, 2–32 V supply | Limited to ≤125°C ambient; higher offset increases threshold uncertainty in precision sensing | Select when cost sensitivity outweighs accuracy/speed needs and legacy qualification suffices |
| TLV1702IDR | Rail-to-rail input/output, 36 V supply, 1.2 µs response, but 500 µA IQ and no ESD clamps | Requires external ESD protection; RRO output eliminates pull-up but adds complexity in mixed-voltage systems | Choose for systems needing push-pull output or ultra-low input bias (0.3 pA), accepting higher BOM count |
Compared with LM2903DR and TLV1702IDR, LM2903BIDDFR delivers the lowest input offset and fastest response in a drop-in SOT-23-8 package with integrated 2 kV HBM protection - making it optimal for new industrial designs requiring precision, speed, and robustness without layout changes.
Availability
LM2903BIDDFR is available at Aetrix Electronics and suitable for server PSU monitoring, motor drive feedback, and factory automation sensor interfaces requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM2903BIDDFR 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 solutions for industrial, automotive, and communications markets.
The LM2903B series belongs to TI's precision comparator product line, engineered specifically for high-reliability industrial power management and real-time control systems where accuracy, speed, and ruggedness are critical.
FAQ
What is the maximum supply voltage rating for LM2903BIDDFR?
The LM2903BIDDFR has an absolute maximum supply voltage rating of 38 V, with recommended operating range from 2 V to 36 V. This exceeds legacy LM2903 (32 V max) and enables direct interfacing with 36 V industrial buses without external regulators or voltage dividers - a key advantage in high-voltage power supply monitoring applications using the LM2903BIDDFR.
Does LM2903BIDDFR support ground-referenced input signals?
Yes, the LM2903BIDDFR supports common-mode input voltages down to –0.1 V (slightly below ground), allowing true ground-referenced sensing. This capability is essential for current-sense amplifier outputs, battery terminal monitoring, and other 0 V–referenced analog signals - a confirmed feature of the LM2903BIDDFR validated across its full –40°C to +125°C operating range.
Is LM2903BIDDFR pin-compatible with standard SOIC-8 LM2903 variants?
No - LM2903BIDDFR uses the SOT-23-8 (DDF) package, not SOIC-8. While functionally identical to LM2903 variants, its 2.90 mm × 1.60 mm footprint requires PCB redesign. For SOIC-8 compatibility, use LM2903BIDR instead. The LM2903BIDDFR pinout matches DDF mechanical specifications, with pin 1 = 1OUT and pin 8 = VCC, as confirmed in TI's SLCS005AH datasheet Figure 4-1.
What is the typical input offset voltage of LM2903BIDDFR over temperature?
The LM2903BIDDFR has a typical input offset voltage of ±0.37 mV at 25°C, with a guaranteed maximum of ±4 mV across the full –40°C to +125°C operating range. This specification is explicitly confirmed in Section 5.6 of the official datasheet for LM2903B devices in DDF packaging, making the LM2903BIDDFR suitable for precision threshold detection in automotive and industrial environments.
Can LM2903BIDDFR drive a 5 V logic input directly?
Yes - the LM2903BIDDFR open-collector outputs can sink up to 21 mA and are compatible with TTL, CMOS, and MOS logic families. When paired with a 5 V pull-up resistor (e.g., 10 kΩ), it delivers clean 0 V / Hi-Z switching that meets standard 5 V logic thresholds. This behavior is confirmed in the "Output compatible with TTL, MOS, and CMOS" feature list and electrical characteristics table for the LM2903BIDDFR.
LM2903BIDDFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- 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 (±):
- 3V ~ 36V, ±1.5V ~ 18V
- :
- 2.5mV @ 36V
- Voltage - Input Offset (Max):
- 0.025µA @ 5V
- Current - Input Bias (Max):
- 21mA @ 5V
- Current - Output (Typ):
- 600µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 1µs (Typ)
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- TSOT-23-8
LM2903BIDDFR FAQ
1.How can I place an order for LM2903BIDDFR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2903BIDDFR 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 LM2903BIDDFR reliable?
The price and inventory of LM2903BIDDFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2903BIDDFR is usually 5 days.
3.What payment methods are accepted for LM2903BIDDFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2903BIDDFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2903BIDDFR?
LM2903BIDDFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2903BIDDFR 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 LM2903BIDDFR?
For technical support, including LM2903BIDDFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2903BIDDFR requirements.
6.How does Aetrix verify that LM2903BIDDFR is sourced from the original manufacturer or authorized distributors?
All LM2903BIDDFR 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 LM2903BIDDFR meets industry standards.
7.What is the process for return or replacement of LM2903BIDDFR?
All LM2903BIDDFR units undergo pre-shipment inspection (PSI). If there is an issue with LM2903BIDDFR, 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 LM2903BIDDFR part is unused and in its original packaging.
Return procedure for LM2903BIDDFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2903BIDDFR Tags
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