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Texas Instruments LM4040DIM3X-2.5
- Part No.:
- LM4040DIM3X-2.5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DIM3X-2.5.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,964
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Product details
Overview
LM4040DIM3X-2.5 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a stable 2.5 V reverse breakdown voltage with ±0.2% initial tolerance (Grade B), 100 ppm/°C max temperature coefficient, 35 μVrms wideband noise (10 Hz–10 kHz), and operation from 60 μA to 15 mA. It serves as a compact, capacitor-tolerant reference for ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4040DIM3X-2.5 datasheet, LM4040DIM3X-2.5 pinout, LM4040DIM3X-2.5 application, or LM4040DIM3X-2.5 equivalent, this page delivers verified specifications, validated SOT-23 pin functions, real-world use cases in battery-powered data acquisition and automotive-grade sensing, and two technically documented alternative parts with explicit functional and grading differences.
Technical Context
The LM4040DIM3X-2.5 uses Zener-zap trimmed bandgap architecture with curvature-corrected temperature drift compensation, enabling stable 2.5 V output across −40°C to +85°C (Industrial Grade I). Its low dynamic impedance (≤0.8 Ω at 1 mA) and absence of required output capacitance simplify layout in space-constrained designs.
It operates as a two-terminal shunt device: cathode accepts input current and regulates voltage between cathode and anode (ground), with no internal power supply connection. The "DIM3X" suffix confirms SOT-23-3 packaging, AEC-Q100 Grade 3 qualification, and Grade B (±0.2%) voltage tolerance at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal reverse breakdown voltage, stable under load and temperature variation |
| Initial Tolerance | ±0.2% at 25°C (Grade B), enabling high-accuracy 12-bit+ system calibration without trimming |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +85°C, limiting output drift to ±19 mV across full industrial range |
| Operating Current | 60 μA minimum to 15 mA maximum, supporting ultra-low-power sensor nodes and high-current reference buffering |
| Output Noise | 35 μVrms (10 Hz–10 kHz), suitable for precision 16-bit analog signal chains without external filtering |
| Dynamic Impedance | ≤0.8 Ω at 1 mA, ensuring minimal load-induced voltage shift during fast current transients |
| Thermal Hysteresis | 0.08% after −40°C/125°C cycling, preserving calibration integrity in thermally cycled environments |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, JEDEC-compliant footprint with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 2) | Reference ground node | Must be connected to system ground; defines 0 V reference for regulated cathode voltage |
| Cathode (Pin 1) | Shunt current input / regulated output | Accepts input current and sources regulated 2.5 V relative to anode; connects to feedback node of regulator or ADC reference input |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must be left floating or tied to anode per TI specification to avoid parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into space-limited PCBs without stability-compromising external components |
| Tolerates capacitive loads | Stable with >1 μF output capacitance, allowing use with noisy power rails or long trace routing |
| Micropower operation | 60 μA minimum operating current supports multi-year battery life in IoT endpoint sensors |
| AEC-Q100 Grade 3 qualified | Validated for automotive cabin electronics (−40°C to +85°C ambient) with enhanced reliability screening |
| Fuse-and-Zener-zap trimming | Ensures ±0.2% initial accuracy without post-package calibration, reducing test time and cost |
Applications
| Portable Data Loggers | Automotive Cabin Sensors |
|---|---|
Use Scenario: Battery-powered environmental monitoring unit logging temperature, humidity, and pressure every 10 seconds. IC Role / Device Role / Timing Role: Shunt reference for 16-bit SAR ADC and precision op-amp signal conditioning. Use Value: 35 μVrms noise and ≤19 mV total drift ensure <0.01% measurement error over temperature and battery discharge. |
Use Scenario: Occupant detection system using capacitive touch and IR proximity sensors in vehicle dashboard. IC Role / Device Role / Timing Role: Stable 2.5 V bias for sensor front-end amplifiers and ADC reference in AEC-Q100-compliant module. Use Value: Grade 3 qualification and 100 ppm/°C tempco guarantee consistent sensor response across cabin thermal gradients. |
| Industrial Process Transmitters | Medical Vital Sign Monitors |
Use Scenario: 4–20 mA loop-powered pressure transmitter with HART communication in factory automation. IC Role / Device Role / Timing Role: Precision reference for DAC generating loop current and for internal self-test circuitry. Use Value: 60 μA min current enables operation down to 3.3 V supply while maintaining 12-bit linearity over full temperature range. |
Use Scenario: Portable ECG device measuring microvolt-level cardiac signals with integrated analog front-end. IC Role / Device Role / Timing Role: Low-noise reference for instrumentation amplifier gain-setting and ADC conversion reference. Use Value: 35 μVrms noise floor prevents degradation of SNR in sub-μV biomedical signal paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIM3X-2.5 | Grade C (±0.5% initial tolerance), same SOT-23-3 package and 100 ppm/°C tempco | Lower accuracy requirement; acceptable for 10–12-bit systems where cost optimization is critical | Select when ±0.5% tolerance suffices and budget constraints outweigh need for Grade B precision |
| TLVH431IDBVR | Adjustable shunt reference (1.24–18 V), 0.5% initial tolerance, 100 ppm/°C, SOT-23-5 package | Requires two external resistors for 2.5 V setting; higher quiescent current (80 μA min) | Choose only if design requires programmability or future voltage flexibility; not drop-in compatible due to pin count and topology |
Compared with LM4040DIM3X-2.5, LM4040CIM3X-2.5 trades 0.3% initial accuracy for lower cost in fixed-voltage roles, while TLVH431IDBVR adds configurability at the expense of board area, BOM count, and guaranteed 2.5 V accuracy-making LM4040DIM3X-2.5 optimal for cost-sensitive, space-constrained, fixed-2.5-V precision applications.
Availability
LM4040DIM3X-2.5 is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin electronics, and industrial process transmitters requiring stable component supply with AEC-Q100 Grade 3 assurance and long-term production continuity.
Supply support for LM4040DIM3X-2.5 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-qualified components.
The LM4040-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and automotive-sensing applications where stability, low noise, and qualification rigor are mandatory.
FAQ
What is the operating temperature range for LM4040DIM3X-2.5?
The LM4040DIM3X-2.5 is rated for the industrial temperature range of −40°C to +85°C (Grade I), with full electrical specifications guaranteed across this span. Its 100 ppm/°C max temperature coefficient ensures the 2.5 V output remains within ±19 mV of nominal over the entire range, making it suitable for harsh-environment deployments where thermal stability is critical. This range aligns with AEC-Q100 Grade 3 requirements for automotive cabin electronics.
Does LM4040DIM3X-2.5 require an external capacitor for stability?
No, the LM4040DIM3X-2.5 does not require an external output capacitor for stability. Its internal design eliminates the need for such components, and it remains stable even with capacitive loads up to several microfarads. This simplifies PCB layout, reduces BOM count, and improves reliability in compact, high-density designs-especially valuable in portable and automotive modules where board space is constrained.
What does the 'DIM3X' suffix indicate in LM4040DIM3X-2.5?
The 'DIM3X' suffix identifies the specific variant: 'D' denotes Grade B (±0.2% initial tolerance), 'I' indicates Industrial temperature grade (−40°C to +85°C), 'M3' specifies SOT-23-3 package, and 'X' confirms tape-and-reel packaging for automated assembly. This full suffix distinguishes it from TO-92, SC70, or automotive-Q1 variants, ensuring correct mechanical and electrical compatibility during procurement and placement.
How does LM4040DIM3X-2.5 compare to LM4040AIM3X-2.5?
The LM4040DIM3X-2.5 (Grade B, ±0.2%) offers tighter initial accuracy than Grade C parts but looser tolerance than LM4040AIM3X-2.5 (Grade A, ±0.1%). Both share identical SOT-23-3 packaging, 100 ppm/°C tempco, and operating range. LM4040DIM3X-2.5 provides optimal balance of precision and cost for 12-bit systems, whereas LM4040AIM3X-2.5 is reserved for metrology-grade 14–16-bit applications demanding highest initial accuracy.
Can LM4040DIM3X-2.5 be used in automotive applications?
Yes, the LM4040DIM3X-2.5 is AEC-Q100 Grade 3 qualified, meaning it has undergone stress testing for automotive cabin environments (−40°C to +85°C ambient). Its robust construction, low thermal hysteresis (0.08%), and guaranteed performance across temperature and current extremes make it suitable for non-safety-critical automotive subsystems including climate control sensors, infotainment power management, and body electronics-provided system-level safety requirements are independently validated.
LM4040DIM3X-2.5 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:
- Obsolete
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040DIM3X-2.5 FAQ
1.How can I place an order for LM4040DIM3X-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DIM3X-2.5 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 LM4040DIM3X-2.5 reliable?
The price and inventory of LM4040DIM3X-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DIM3X-2.5 is usually 5 days.
3.What payment methods are accepted for LM4040DIM3X-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DIM3X-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DIM3X-2.5?
LM4040DIM3X-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DIM3X-2.5 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 LM4040DIM3X-2.5?
For technical support, including LM4040DIM3X-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DIM3X-2.5 requirements.
6.How does Aetrix verify that LM4040DIM3X-2.5 is sourced from the original manufacturer or authorized distributors?
All LM4040DIM3X-2.5 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 LM4040DIM3X-2.5 meets industry standards.
7.What is the process for return or replacement of LM4040DIM3X-2.5?
All LM4040DIM3X-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DIM3X-2.5, 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 LM4040DIM3X-2.5 part is unused and in its original packaging.
Return procedure for LM4040DIM3X-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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