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Texas Instruments LM4040AIM3X-2.5
- Part No.:
- LM4040AIM3X-2.5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040AIM3X-2.5.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,694
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Product details
Overview
LM4040AIM3X-2.5 from Texas Instruments is a precision micropower shunt voltage reference delivering a stable 2.5 V reverse breakdown voltage with ±0.1% initial tolerance (A grade, 25°C), 100 ppm/°C max temperature coefficient, and 35 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA over −40°C to +85°C and requires no output capacitor-ideal for space-constrained analog front-ends in portable instrumentation and battery-powered data acquisition.
For engineers reviewing the LM4040AIM3X-2.5 datasheet, LM4040AIM3X-2.5 pinout, LM4040AIM3X-2.5 application, or LM4040AIM3X-2.5 equivalent, this page delivers verified specifications, SOT-23 package details, thermal performance data, and validated alternative options for precision reference design and BOM optimization.
Technical Context
The LM4040AIM3X-2.5 uses Zener-zap trimming and bandgap curvature correction to achieve high initial accuracy and low drift across temperature. Its low dynamic impedance (≤0.8 Ω at 1 mA) ensures minimal load regulation error (<6 mV over 1–15 mA), while capacitive-load tolerance eliminates stability concerns in ADC reference or op-amp biasing circuits.
Designed for industrial-grade operation, it supports 60 μA minimum cathode current and withstands up to 20 mA reverse current. The device's thermal hysteresis is limited to 0.08% after cycling between −40°C and +125°C, enabling repeatable calibration in field-deployed measurement systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal reverse breakdown voltage, tightly regulated for ADC/DAC reference and sensor excitation |
| Initial Tolerance | ±0.1% at 25°C (A grade), enabling single-point calibration in high-accuracy systems |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +85°C, limiting full-range drift to ±19 mV |
| Operating Current | 60 μA to 15 mA range-supports ultra-low-power sleep modes and high-current buffer stages |
| Output Noise | 35 μVrms (10 Hz–10 kHz), suitable for 16-bit+ data converters without external filtering |
| Dynamic Impedance | ≤0.8 Ω at 1 mA, minimizing voltage shift under varying load conditions |
| Thermal Hysteresis | 0.08% after −40°C/+125°C thermal cycling, ensuring long-term repeatability in test equipment |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body, 3-pin surface-mount, JEDEC MO-178 compatible. Anode grounded, cathode supplies reference voltage and sinks current, NC pin (pin 3) must be left floating or tied to anode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 2) | Reference ground node | Must be connected to system ground; establishes cathode voltage relative to GND |
| Cathode (Pin 1) | Shunt output / current sink | Delivers stable 2.5 V when reverse-biased; sinks all operating current from external source |
| NC (Pin 3) | No-connect terminal | Internally unconnected; leave floating or tie to anode per TI layout guidance |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables direct integration into compact PCB layouts without stability-compensation components |
| Tolerates capacitive loads | Stable with >1 μF output capacitance-supports low-noise filtering and supply decoupling |
| Low micropower operation | 60 μA minimum current allows use in energy-harvesting and coin-cell applications |
| Wide temperature range | −40°C to +85°C industrial grade rating ensures reliability in factory automation and outdoor sensors |
| High ESD robustness | ±2000 V HBM rating simplifies handling and reduces assembly-line failures |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitoring nodes sampling temperature, humidity, and pressure at 1–10 Hz. IC Role / Device Role / Timing Role: Shunt reference for 16-bit SAR ADC and op-amp signal conditioning circuitry. Use Value: 35 μVrms noise and ±0.1% tolerance enable <1 LSB error without calibration across 0–50°C ambient range. |
Use Scenario: 4–20 mA loop-powered transmitters converting RTD or strain-gauge signals. IC Role / Device Role / Timing Role: Precision 2.5 V reference for ratiometric excitation and ADC reference in isolated analog front-end. Use Value: 100 ppm/°C tempco and 0.08% thermal hysteresis ensure <0.05% span error over field temperature cycling. |
| Medical Instrumentation | Energy Metering IC Calibration |
Use Scenario: Portable ECG and pulse oximetry devices requiring low-noise, low-drift analog signal chains. IC Role / Device Role / Timing Role: Reference for instrumentation amplifiers and anti-aliasing filters feeding medical-grade ADCs. Use Value: 60 μA min current enables ultra-low standby power; 35 μVrms noise avoids additional filtering stages. |
Use Scenario: Class 0.5 smart electricity meters performing real-time RMS voltage/current computation. IC Role / Device Role / Timing Role: Stable 2.5 V reference for metrology ADCs and on-chip calibration DACs. Use Value: ±19 mV overtemperature tolerance (−40°C to +85°C) meets IEC 62053-21 linearity requirements without software compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3025AIDBZR | 2.5 V series reference; 50 ppm/°C max tempco; 3.6 V to 5.5 V supply required; 50 μA quiescent current | Requires external supply rail; not shunt-based-unsuitable for floating or high-side sensing topologies | Select when supply rail is available and lower tempco is critical; avoid if shunt topology or zero-supply operation is needed |
| ADR3425ARJZ-R7 | 2.5 V series reference; 10 ppm/°C max tempco; 3.0 V to 15 V supply; 120 μA quiescent current; higher cost | Higher accuracy and stability but incompatible with shunt-based current-sink architectures | Choose for metrology-grade applications where supply headroom exists and sub-10 ppm/°C drift is mandatory |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the LM4040AIM3X-2.5 uniquely supports shunt operation with no supply rail, enabling simpler two-terminal designs in battery-backed or isolated systems-while trading absolute tempco for broader compatibility and lower system-level BOM count.
Availability
LM4040AIM3X-2.5 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and medical data acquisition systems requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for LM4040AIM3X-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 high-reliability manufacturing.
The LM4040-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and industrial measurement applications-emphasizing low drift, low noise, and robust thermal performance without external components.
FAQ
What is the maximum operating current for LM4040AIM3X-2.5?
The LM4040AIM3X-2.5 supports a maximum reverse current of 15 mA under recommended operating conditions. Exceeding this may cause thermal overload or parametric shift. At 15 mA, power dissipation in the SOT-23 package reaches ~37.5 mW-well within its 306 mW rating at 25°C ambient. Derating is required above 25°C per RθJA = 291.9°C/W.
Does LM4040AIM3X-2.5 require an output capacitor for stability?
No, the LM4040AIM3X-2.5 does not require an output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including >1 μF ceramic or tantalum types. This eliminates board space and cost associated with external compensation-making it ideal for compact, high-density layouts where layout parasitics could destabilize traditional references.
What is the temperature coefficient specification for LM4040AIM3X-2.5?
The LM4040AIM3X-2.5 has a maximum average temperature coefficient of 100 ppm/°C over the industrial temperature range (−40°C to +85°C). This translates to a worst-case voltage drift of ±19 mV across the full range, calculated as 2.5 V × 0.75% (±0.1% initial tolerance + 100 ppm/°C × 65°C). This value is production-tested and guaranteed per TI's SQC methodology.
Can LM4040AIM3X-2.5 be used in automotive applications?
The LM4040AIM3X-2.5 is rated for industrial temperature range (−40°C to +85°C) and is not AEC-Q200 qualified. For automotive applications, TI offers the LM4040-N-Q1 variant (e.g., LM4040QAIM3X-2.5), which is AEC-Q100 Grade 3 qualified and specified over −40°C to +125°C. Using LM4040AIM3X-2.5 in automotive environments may compromise long-term reliability and is not recommended for safety-critical or production vehicle systems.
What is the meaning of the 'X' suffix in LM4040AIM3X-2.5?
The 'X' in LM4040AIM3X-2.5 denotes tape-and-reel packaging per TI's standard ordering convention. It indicates the part is supplied in 3000-unit reels compatible with automated SMT placement equipment. The base device remains functionally identical to LM4040AIM3-2.5; only packaging differs-no electrical or thermal parameter changes are associated with the 'X' suffix.
LM4040AIM3X-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:
- ±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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040AIM3X-2.5 FAQ
1.How can I place an order for LM4040AIM3X-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AIM3X-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 LM4040AIM3X-2.5 reliable?
The price and inventory of LM4040AIM3X-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 LM4040AIM3X-2.5 is usually 5 days.
3.What payment methods are accepted for LM4040AIM3X-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AIM3X-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AIM3X-2.5?
LM4040AIM3X-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AIM3X-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 LM4040AIM3X-2.5?
For technical support, including LM4040AIM3X-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AIM3X-2.5 requirements.
6.How does Aetrix verify that LM4040AIM3X-2.5 is sourced from the original manufacturer or authorized distributors?
All LM4040AIM3X-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 LM4040AIM3X-2.5 meets industry standards.
7.What is the process for return or replacement of LM4040AIM3X-2.5?
All LM4040AIM3X-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AIM3X-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 LM4040AIM3X-2.5 part is unused and in its original packaging.
Return procedure for LM4040AIM3X-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040AIM3X-2.5 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
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