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Texas Instruments LM4040QAIM3X2.5/NOPB
- Part No.:
- LM4040QAIM3X2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040QAIM3X2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,221
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Product details
Overview
LM4040QAIM3X2.5/NOPB from Texas Instruments is an AEC-Q100 Grade 3 qualified precision micropower shunt voltage reference with 2.5 V nominal reverse breakdown voltage, ±0.1% initial tolerance (A grade), 35 μVrms wideband noise (10 Hz–10 kHz), and stable operation from 60 μA to 15 mA over −40°C to +85°C. It serves as a compact, capacitor-free reference in automotive sensor signal conditioning and industrial data acquisition circuits.
For engineers reviewing the LM4040QAIM3X2.5/NOPB datasheet, LM4040QAIM3X2.5/NOPB pinout, LM4040QAIM3X2.5/NOPB application, or LM4040QAIM3X2.5/NOPB equivalent, key selection criteria include its AEC-Q100 qualification, SOT-23 package compatibility, low temperature coefficient (≤100 ppm/°C), absence of output capacitor requirement, and verified performance across automotive-grade temperature and current ranges.
Technical Context
The LM4040QAIM3X2.5/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.1% accuracy at 25°C and incorporates bandgap-based temperature drift curvature correction. Its low dynamic impedance (0.3–0.8 Ω) and stable reverse breakdown voltage ensure minimal load regulation error (<8 mV over 1–15 mA).
Designed for shunt configuration, it operates without an external stabilizing capacitor and tolerates arbitrary capacitive loads-enabling direct connection to ADC reference inputs or op-amp feedback networks in space-constrained automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal reverse breakdown voltage, specified at 100 μA test current |
| Initial Tolerance | ±0.1% maximum at 25°C (A grade), enabling high-accuracy analog front-ends without calibration |
| Temp Coefficient | ≤100 ppm/°C max over −40°C to +85°C, limiting drift-induced error to ≤19 mV across full range |
| Operating Current | 60 μA minimum to 15 mA maximum, supporting ultra-low-power sensor biasing and robust supply rejection |
| Output Noise | 35 μVrms (10 Hz–10 kHz), suitable for 16-bit+ data acquisition systems |
| Dynamic Impedance | 0.3–0.8 Ω at 1 mA, ensuring <6 mV load regulation shift from 1 mA to 15 mA |
| Thermal Hysteresis | 0.08% max, minimizing voltage offset after thermal cycling in automotive environments |
Pinout & Package
LM4040QAIM3X2.5/NOPB is packaged in a 3-pin SOT-23 (DBZ) case measuring 2.92 mm × 1.30 mm. The device functions as a two-terminal shunt reference; pin 1 is Cathode (I/O), pin 2 is Anode (ground reference), and pin 3 is NC (no connect, must float or tie to anode per TI layout guidance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Cathode) | Shunt current input / output voltage node | Connects to regulated voltage rail; sinks current to maintain 2.5 V across external load/resistor |
| Pin 2 (Anode) | Reference ground terminal | Must be connected to system ground; defines the 0 V reference for cathode voltage |
| Pin 3 (NC) | No-connect terminal | Not internally bonded; leave floating or tie to pin 2 (anode) in EMI-sensitive layouts |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 3 qualification | Validated for automotive applications operating from −40°C to +85°C ambient |
| No output capacitor required | Enables immediate power-up stability and eliminates BOM cost/PCB area for external COUT |
| Tolerates capacitive loads | Stable with any value of parallel capacitance-ideal for driving ADC reference pins directly |
| Zener-zap voltage trim | Ensures ±0.1% initial accuracy without post-package adjustment or laser trimming |
| Low quiescent current | 60 μA minimum operating current supports battery-powered field transmitters and IoT sensors |
Applications
| Automotive Sensor Signal Conditioning | Industrial Data Acquisition |
|---|---|
Use Scenario: Biasing and referencing pressure, temperature, and position sensors in engine control units and ADAS modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 2.5 V reference for sensor excitation and ADC conversion. Use Value: Enables <±0.1% measurement accuracy over automotive temperature range without recalibration. | Use Scenario: High-resolution analog input modules in PLCs and SCADA systems. IC Role / Device Role / Timing Role: Precision reference for 16-bit SAR ADCs and instrumentation amplifiers. Use Value: Delivers 35 μVrms noise floor and <8 mV load regulation-meeting EN 61000-4-3 immunity requirements. |
| Field Transmitter Power Management | Energy Infrastructure Monitoring |
Use Scenario: Loop-powered 4–20 mA transmitters in hazardous-area process instrumentation. IC Role / Device Role / Timing Role: Low-current shunt reference setting excitation voltage for RTD/thermocouple interfaces. Use Value: Operates down to 60 μA, preserving headroom for 4 mA loop compliance while maintaining ±0.1% accuracy. | Use Scenario: Voltage monitoring in smart meters and grid-edge inverters. IC Role / Device Role / Timing Role: Stable reference for isolation amplifier feedback and DC bus sensing. Use Value: AEC-Q100 qualification ensures reliability under thermal cycling and long-term grid deployment conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C25IDBZR | ±0.5% initial tolerance, 75 ppm/°C max tempco, 40 μVrms noise, same SOT-23-3 package | Lower accuracy and higher drift limit use in non-critical industrial controls | Select when cost sensitivity outweighs ±0.1% automotive-grade accuracy requirements |
| MAX6002EUR+T | ±0.2% initial tolerance, 100 ppm/°C max tempco, 50 μVrms noise, SOT-23-3, no AEC-Q100 rating | Lacks automotive qualification; suitable only for commercial-grade data loggers | Choose for non-automotive designs needing tighter tolerance than TL4050 but no AEC validation |
Compared with TL4050C25IDBZR and MAX6002EUR+T, the LM4040QAIM3X2.5/NOPB delivers superior initial accuracy (±0.1% vs ±0.2%/±0.5%), guaranteed AEC-Q100 Grade 3 compliance, and lower noise-making it the only option qualified for safety-critical automotive sensor references.
Availability
LM4040QAIM3X2.5/NOPB is available at Aetrix Electronics and suitable for automotive sensor modules, industrial data acquisition systems, and field transmitter designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for LM4040QAIM3X2.5/NOPB 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 specializing in analog and embedded processing technologies, with decades of expertise in precision reference design and automotive-grade component validation.
The LM4040-N/Q1 product line targets space-constrained, high-reliability applications-including automotive ECUs, industrial sensors, and energy metering-where micropower operation, AEC-Q100 compliance, and capacitor-free stability are mandatory.
FAQ
What is the operating temperature range for LM4040QAIM3X2.5/NOPB?
The LM4040QAIM3X2.5/NOPB is rated for −40°C to +85°C ambient temperature (AEC-Q100 Grade 3). This range is validated per automotive qualification standards and covers typical under-hood and cabin-mounted electronic control unit environments. The device maintains ±0.1% initial tolerance and ≤100 ppm/°C temperature coefficient across this full span, with derating applied beyond 85°C per TI's thermal specifications.
Does LM4040QAIM3X2.5/NOPB require an external output capacitor?
No, the LM4040QAIM3X2.5/NOPB does not require an external output capacitor. Its internal architecture provides inherent stability across all capacitive loads, eliminating the need for external stabilization components. This simplifies PCB layout, reduces BOM count, and improves startup behavior-especially beneficial in automotive modules where board space and component count are tightly constrained.
What is the minimum operating current for LM4040QAIM3X2.5/NOPB?
The LM4040QAIM3X2.5/NOPB has a minimum operating current of 60 μA at 25°C, increasing to 65 μA across the full −40°C to +85°C range. This ultra-low current enables use in battery-powered field transmitters and energy-harvesting systems where supply current budgets are limited to sub-100 μA levels while still maintaining 2.5 V reference accuracy within ±0.1%.
How is the LM4040QAIM3X2.5/NOPB pinout configured in SOT-23?
In the SOT-23 (DBZ) package, LM4040QAIM3X2.5/NOPB has three terminals: Pin 1 is Cathode (shunt current path/output voltage node), Pin 2 is Anode (ground reference), and Pin 3 is NC (no connect). TI recommends leaving Pin 3 floating or connecting it to Pin 2 in high-EMI environments such as near switching power supplies or motor drivers.
Is LM4040QAIM3X2.5/NOPB qualified for automotive applications?
Yes, LM4040QAIM3X2.5/NOPB is AEC-Q100 qualified for automotive applications (Grade 3: −40°C to +85°C). It meets stress testing requirements including HTOL, TC, UHAST, and ESD per AEC-Q100-002 and -011. This qualification confirms suitability for non-safety-critical but reliability-demanding automotive subsystems such as body control modules, HVAC sensors, and infotainment power management.
LM4040QAIM3X2.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040QAIM3X2.5/NOPB FAQ
1.How can I place an order for LM4040QAIM3X2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040QAIM3X2.5/NOPB 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 LM4040QAIM3X2.5/NOPB reliable?
The price and inventory of LM4040QAIM3X2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040QAIM3X2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040QAIM3X2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040QAIM3X2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040QAIM3X2.5/NOPB?
LM4040QAIM3X2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040QAIM3X2.5/NOPB 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 LM4040QAIM3X2.5/NOPB?
For technical support, including LM4040QAIM3X2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040QAIM3X2.5/NOPB requirements.
6.How does Aetrix verify that LM4040QAIM3X2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040QAIM3X2.5/NOPB 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 LM4040QAIM3X2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040QAIM3X2.5/NOPB?
All LM4040QAIM3X2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040QAIM3X2.5/NOPB, 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 LM4040QAIM3X2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4040QAIM3X2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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