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Texas Instruments LM4040QDIM3-2.5/NOPB
- Part No.:
- LM4040QDIM3-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040QDIM3-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,809
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Product details
Overview
LM4040QDIM3-2.5/NOPB from Texas Instruments is an AEC-Q100 Grade 3 qualified precision micropower shunt voltage reference in SOT-23 package, delivering a stable 2.5 V reverse breakdown voltage with ±0.1% initial tolerance (A grade), 35 μVrms wideband noise (10 Hz–10 kHz), and operation across −40°C to +85°C. It serves as a compact, capacitor-free reference for analog signal conditioning in automotive sensor modules.
For engineers reviewing the LM4040QDIM3-2.5/NOPB datasheet, LM4040QDIM3-2.5/NOPB pinout, LM4040QDIM3-2.5/NOPB application, or LM4040QDIM3-2.5/NOPB equivalent, key selection criteria include its AEC-Q100 qualification, 60 μA minimum operating current, 100 ppm/°C max temperature coefficient, and SOT-23 thermal performance (RθJA = 291.9°C/W).
Technical Context
The LM4040QDIM3-2.5/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.1% accuracy at 25°C and incorporates bandgap-derived curvature correction for low temperature drift. Its shunt topology requires no output capacitor and remains stable under capacitive loads up to 15 mA.
Designed for automotive Grade 3 (−40°C to +85°C) operation, it features fuse-trimmed reverse breakdown voltage, low dynamic impedance (0.3–0.8 Ω), and thermal hysteresis of just 0.08% - enabling high-accuracy ADC/DAC biasing in field transmitters and battery monitoring systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal reverse breakdown voltage, fixed and factory-trimmed - eliminates need for external adjustment circuitry. |
| Initial Tolerance | ±0.1% at 25°C (A grade) - supports high-precision data acquisition without post-calibration. |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +85°C - ensures ≤±19 mV total drift across full industrial range. |
| Noise (10Hz–10kHz) | 35 μVrms - enables clean reference for 16-bit+ SAR ADCs without additional filtering. |
| Operating Current | 60 μA to 15 mA - compatible with ultra-low-power microcontrollers and energy-harvesting sensors. |
| Thermal Hysteresis | 0.08% - guarantees repeatable voltage after thermal cycling, critical for automotive re-calibration routines. |
| ESD Rating (HBM) | ±2000 V - meets AEC-Q100-002 for robustness in automotive assembly and field environments. |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC MO-178 compliant. Thermal resistance RθJA = 291.9°C/W when board-mounted.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Shunt current input and output voltage node - connects to regulated rail; sinks all excess current to ground via external resistor. |
| 2 | Anode | Ground reference terminal - must be connected to system ground; defines cathode-to-ground potential. |
| 3 | NC | No-connect pin - left floating or tied to Anode (Pin 2) per TI recommendation for EMI-sensitive layouts. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 3 qualification | Validated for automotive use from −40°C to +85°C ambient, including stress testing per AEC standards. |
| Capacitor-free stability | Operates without output capacitor and tolerates arbitrary capacitive loads - simplifies layout and reduces BOM count. |
| Zener-zap voltage trim | Factory-trimmed using wafer-level fuse and Zener-zap process to guarantee ±0.1% initial accuracy. |
| Low dynamic impedance | 0.3–0.8 Ω at 1 mA - minimizes load regulation error (<6 mV over 1–15 mA current range). |
| Wide current range | Functional from 60 μA to 15 mA - supports both ultra-low-power sleep modes and active high-speed conversion. |
Applications
| Automotive Sensor Signal Conditioning | Industrial Analog Input Module |
|---|---|
|
Use Scenario: Biasing thermistor, RTD, or strain gauge bridges in engine control units and ADAS camera modules. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V excitation and ADC reference voltage. Use Value: ±0.1% tolerance and 100 ppm/°C TC ensure <±0.5% total measurement error across vehicle lifetime and temperature extremes. |
Use Scenario: Reference for 16-bit delta-sigma ADCs in programmable logic controller (PLC) analog input cards. IC Role / Device Role / Timing Role: Precision voltage reference for ratiometric sensor measurements and calibration storage. Use Value: 35 μVrms noise and 0.08% thermal hysteresis enable sub-LSB stability in multi-cycle calibration sequences. |
| Energy Infrastructure Monitoring | Portable Test Equipment |
|
Use Scenario: Voltage reference in smart meter front-end for current transformer and shunt-based current sensing. IC Role / Device Role / Timing Role: Stable 2.5 V reference for metrology-grade ADCs measuring grid voltage and current harmonics. Use Value: AEC-Q100 qualification and 120 ppm long-term stability support 10-year metrology certification requirements. |
Use Scenario: Reference source in handheld multimeters and portable oscilloscope front-ends. IC Role / Device Role / Timing Role: Low-noise, low-drift shunt reference for autoranging and auto-zero functions. Use Value: 60 μA minimum current enables operation from coin-cell batteries while maintaining ±0.1% accuracy. |
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 | 2.5 V, ±0.5% initial tolerance, 75 ppm/°C TC, SOT-23 package, non-AEC-Q100. | Lacks automotive qualification; higher tolerance and drift limit use in safety-critical ECUs. | Select when cost sensitivity outweighs AEC-Q100 requirement and ±0.5% accuracy suffices. |
| MAX6002AEUR+T | 2.5 V, ±0.2% initial tolerance, 50 ppm/°C TC, SOT-23, not AEC-Q100 qualified. | Lower drift but no automotive qualification; limited supply chain visibility vs. TI. | Prefer for industrial test gear where 50 ppm/°C TC improves long-term repeatability, but avoid in automotive designs. |
Compared with TL4050C25IDBZR and MAX6002AEUR+T, the LM4040QDIM3-2.5/NOPB uniquely combines AEC-Q100 Grade 3 qualification, ±0.1% tolerance, and proven field reliability - making it the only option qualified for functional-safety-relevant automotive subsystems requiring traceable reference stability.
Availability
LM4040QDIM3-2.5/NOPB is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and energy metering systems requiring stable component supply with full AEC-Q100 documentation and lot traceability.
Supply support for LM4040QDIM3-2.5/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 experience in precision reference design and automotive-grade component validation.
The LM4040-N/Q1 product line delivers micropower shunt references optimized for space-constrained, high-reliability applications including automotive ECUs, industrial sensors, and portable instrumentation - emphasizing accuracy, stability, and qualification rigor.
FAQ
What is the maximum operating current for LM4040QDIM3-2.5/NOPB?
The LM4040QDIM3-2.5/NOPB supports a maximum operating current of 15 mA. This upper limit ensures safe power dissipation within the SOT-23 package's 306 mW rating at 25°C ambient. Exceeding 15 mA risks thermal overload and parametric shift. The LM4040QDIM3-2.5/NOPB must be used with a series current-limiting resistor sized to maintain IR within 60 μA–15 mA across all operating conditions.
Does LM4040QDIM3-2.5/NOPB require an output capacitor?
No, the LM4040QDIM3-2.5/NOPB does not require an output capacitor for stability. Its internal design eliminates the need for external stabilization, and it remains stable with any capacitive load - a key advantage over older shunt references. This feature simplifies PCB layout and reduces bill-of-materials cost. The LM4040QDIM3-2.5/NOPB achieves this through advanced bandgap compensation and low dynamic impedance (0.3–0.8 Ω).
Is LM4040QDIM3-2.5/NOPB qualified for automotive applications?
Yes, the LM4040QDIM3-2.5/NOPB is AEC-Q100 qualified for automotive Grade 3 (−40°C to +85°C ambient). It meets stress testing requirements including HTOL, temperature cycling, and ESD (±2000 V HBM). This qualification is explicitly documented in the TI datasheet SNOS633N and applies specifically to the Q-grade variants like LM4040QDIM3-2.5/NOPB - distinguishing it from standard LM4040-N versions.
What is the temperature coefficient specification for LM4040QDIM3-2.5/NOPB?
The LM4040QDIM3-2.5/NOPB has a maximum average temperature coefficient of 100 ppm/°C over the −40°C to +85°C range. At 25°C, typical TC is ±15 ppm/°C. This translates to a worst-case voltage drift of ±19 mV across the full Grade 3 temperature range (2.5 V × 0.75% = ±19 mV), verified per AEC-Q100 test methodology. The LM4040QDIM3-2.5/NOPB achieves this via curvature-corrected bandgap design.
How is pin 3 (NC) used in the LM4040QDIM3-2.5/NOPB SOT-23 package?
In the LM4040QDIM3-2.5/NOPB SOT-23 (DBZ) package, pin 3 is designated NC (no connect) and must be left floating or connected to pin 2 (Anode). TI recommends tying pin 3 to Anode in EMI-prone environments - such as near switching power supplies or transformers - to reduce noise coupling. This connection does not affect electrical performance but improves immunity. The LM4040QDIM3-2.5/NOPB datasheet explicitly states this guidance in Table 4-1 and Figure 4-1.
LM4040QDIM3-2.5/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:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 70 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040QDIM3-2.5/NOPB FAQ
1.How can I place an order for LM4040QDIM3-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040QDIM3-2.5/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 LM4040QDIM3-2.5/NOPB reliable?
The price and inventory of LM4040QDIM3-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040QDIM3-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040QDIM3-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040QDIM3-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040QDIM3-2.5/NOPB?
LM4040QDIM3-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040QDIM3-2.5/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 LM4040QDIM3-2.5/NOPB?
For technical support, including LM4040QDIM3-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040QDIM3-2.5/NOPB requirements.
6.How does Aetrix verify that LM4040QDIM3-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040QDIM3-2.5/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 LM4040QDIM3-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040QDIM3-2.5/NOPB?
All LM4040QDIM3-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040QDIM3-2.5/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 LM4040QDIM3-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4040QDIM3-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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