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Texas Instruments LM4040EIM3X-3.0/NOPB
- Part No.:
- LM4040EIM3X-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040EIM3X-3.0/NOPB.pdf
- Description:
- IC VREF SHUNT 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,128
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Product details
Overview
LM4040EIM3X-3.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a fixed 3.0 V reverse breakdown voltage with ±2.0% initial tolerance (Grade E), 100 ppm/°C max temperature coefficient, and 35 μVRMS wideband noise (10 Hz–10 kHz). It operates from 62 μA to 15 mA over −40°C to +85°C and requires no output capacitor-used in analog input modules and field transmitters for stable ADC/DAC biasing.
For engineers reviewing the LM4040EIM3X-3.0/NOPB datasheet, LM4040EIM3X-3.0/NOPB pinout, LM4040EIM3X-3.0/NOPB application, or LM4040EIM3X-3.0/NOPB equivalent, this page delivers verified specifications, validated SOT-23 pin functions, confirmed industrial-grade thermal performance, and two rigorously cross-referenced alternative parts for voltage reference selection in space-constrained, low-power systems.
Technical Context
The LM4040EIM3X-3.0/NOPB uses Zener-zap trimming at wafer sort to achieve Grade E (±2.0%) accuracy at 25°C and integrates bandgap-derived curvature correction for stable voltage over temperature. Its low dynamic impedance (≤1.1 Ω at 1 mA) and capacitive-load tolerance eliminate external stabilization components.
Designed for shunt-mode operation, it sinks current between cathode and anode terminals, with cathode serving as both current input and output voltage node. The device maintains regulation across its full 62 μA–15 mA operating current range without oscillation-even under varying load capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal reverse breakdown voltage-fixed value set at wafer level; defines reference point for ADC bias, sensor excitation, or comparator thresholds. |
| Initial Tolerance | ±2.0% at 25°C (Grade E)-translates to ±60 mV absolute error; suitable for non-critical calibration where post-factory trimming is available. |
| Temp Coefficient | ≤100 ppm/°C-adds ≤±24 mV drift over −40°C to +85°C; enables stable performance in unregulated ambient environments. |
| Operating Current | 62 μA to 15 mA-ultra-low minimum enables battery-powered sensing; high upper limit supports driving heavier loads directly. |
| Output Noise | 35 μVRMS (10 Hz–10 kHz)-low enough for 12-bit+ data acquisition without additional filtering in most industrial signal chains. |
| Dynamic Impedance | ≤1.1 Ω at 1 mA-ensures minimal voltage shift under load transients; critical for maintaining reference integrity during multiplexed sampling. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, gull-wing leads. Thermal resistance RθJA = 291.9°C/W (board-mounted).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / output voltage node | Connects to supply rail via series resistor; voltage at this pin is the regulated 3.0 V reference-must be decoupled locally if driving noisy loads. |
| Anode (Pin 2) | Reference ground return | Typically tied to system ground; forms current path with cathode-floating anode invalidates regulation. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must remain floating or tied to anode per TI recommendation for EMI suppression in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable operation with any capacitive load up to 10 nF-reduces BOM count and PCB area in compact sensor nodes. |
| Micropower operation | 62 μA minimum operating current-enables multi-year battery life in wireless field transmitters and portable instrumentation. |
| Fixed 3.0 V output | Factory-trimmed Zener voltage eliminates need for external resistive dividers or digital calibration in 3.3 V system rails. |
| Industrial temperature range | −40°C to +85°C operation-qualified for deployment in factory automation, energy infrastructure, and industrial control cabinets. |
| Low thermal hysteresis | 0.08% voltage shift after −40°C ↔ +125°C cycling-preserves long-term measurement repeatability in thermally cycled equipment. |
Applications
| Field Transmitter | Energy Infrastructure |
|---|---|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitter with integrated ADC and microcontroller. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.0 V bias for ratiometric sensor excitation and ADC reference voltage. Use Value: Eliminates need for external filter capacitor and reduces total solution size by 30% versus discrete Zener+capacitor designs. |
Use Scenario: Smart meter voltage monitoring circuit measuring AC mains with isolation and precision scaling. IC Role / Device Role / Timing Role: Reference source for isolated sigma-delta ADC front-end, ensuring accurate RMS voltage calculation. Use Value: 100 ppm/°C tempco maintains <0.1% full-scale error across outdoor temperature swings from −25°C to +70°C. |
| Analog Input Module | Automotive Body Control |
Use Scenario: 16-channel industrial PLC analog input card accepting ±10 V, 0–20 mA, and thermocouple signals. IC Role / Device Role / Timing Role: Per-channel reference for programmable gain instrumentation amplifier and SAR ADC. Use Value: Low 35 μVRMS noise prevents degradation of effective resolution below 14 bits in high-gain configurations. |
Use Scenario: Cabin ambient light sensor interface in automotive body control module (BCM) with LIN bus communication. IC Role / Device Role / Timing Role: Stable 3.0 V reference for photodiode transimpedance amplifier and 10-bit MCU ADC. Use Value: Micropower 62 μA min current allows continuous sensing during vehicle sleep mode without draining battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C30IDBZR | 3.0 V, ±0.5% initial tolerance (Grade C), 50 ppm/°C max tempco, SOT-23-3 package | Higher accuracy and lower drift-preferred where calibration headroom is limited and thermal stability is critical | Select TL4050C30IDBZR when ±0.5% tolerance and tighter tempco justify cost premium over LM4040EIM3X-3.0/NOPB |
| MAX6003EUR+T | 3.0 V, ±1.0% initial tolerance, 75 ppm/°C max tempco, SC70-3 package, 50 μVRMS noise | Smaller SC70 footprint but higher noise and looser tolerance-suitable for cost-sensitive, space-constrained consumer designs | Choose MAX6003EUR+T only when board area is constrained below SOT-23 limits and ±1.0% tolerance is acceptable |
Compared with LM4040EIM3X-3.0/NOPB, TL4050C30IDBZR offers superior accuracy and thermal stability at higher cost, while MAX6003EUR+T trades tolerance and noise for smaller size-making LM4040EIM3X-3.0/NOPB the optimal balance of industrial-grade reliability, micropower operation, and SOT-23 manufacturability.
Availability
LM4040EIM3X-3.0/NOPB is available at Aetrix Electronics and suitable for field transmitters, energy infrastructure monitoring, and analog input modules requiring stable component supply across extended production lifecycles.
Supply support for LM4040EIM3X-3.0/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 voltage references and industrial-grade IC design.
The LM4040-N product line delivers micropower shunt references optimized for space-constrained, low-current applications-including sensor interfaces, portable instrumentation, and automotive subsystems-where stability, small size, and capacitor-free operation are essential.
FAQ
What is the maximum operating current for LM4040EIM3X-3.0/NOPB?
The LM4040EIM3X-3.0/NOPB supports a maximum operating current of 15 mA. This 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 permanent damage, especially above 85°C ambient temperature where derating applies.
Does LM4040EIM3X-3.0/NOPB require an external capacitor for stability?
No, the LM4040EIM3X-3.0/NOPB does not require an external output capacitor. Its internal design provides inherent stability across all capacitive loads up to 10 nF. Adding a capacitor may improve PSRR in high-noise environments but is never mandatory for regulation-unlike many older shunt references.
What is the temperature range specification for LM4040EIM3X-3.0/NOPB?
The LM4040EIM3X-3.0/NOPB is rated for industrial temperature operation from −40°C to +85°C. It is not qualified to AEC-Q100 Grade 1 (−40°C to +125°C); that qualification applies only to LM4040-N-Q1 variants-not the standard LM4040-N series like LM4040EIM3X-3.0/NOPB.
How is the 3.0 V output voltage trimmed in LM4040EIM3X-3.0/NOPB?
The 3.0 V output voltage of LM4040EIM3X-3.0/NOPB is trimmed using Zener-zap fuse technology during wafer sort. This laser-based process adjusts the Zener breakdown point to achieve the target 3.0 V with ±2.0% initial tolerance (Grade E), verified at 25°C before packaging.
Can LM4040EIM3X-3.0/NOPB drive capacitive loads directly?
Yes, LM4040EIM3X-3.0/NOPB tolerates capacitive loads up to 10 nF without oscillation or instability. Its low dynamic impedance (<1.1 Ω) and internal compensation allow direct connection to ADC reference inputs, op-amp feedback nodes, or microcontroller VREF pins-even with local ceramic decoupling.
LM4040EIM3X-3.0/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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±2%
- 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
LM4040EIM3X-3.0/NOPB FAQ
1.How can I place an order for LM4040EIM3X-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040EIM3X-3.0/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 LM4040EIM3X-3.0/NOPB reliable?
The price and inventory of LM4040EIM3X-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040EIM3X-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040EIM3X-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040EIM3X-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040EIM3X-3.0/NOPB?
LM4040EIM3X-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040EIM3X-3.0/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 LM4040EIM3X-3.0/NOPB?
For technical support, including LM4040EIM3X-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040EIM3X-3.0/NOPB requirements.
6.How does Aetrix verify that LM4040EIM3X-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040EIM3X-3.0/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 LM4040EIM3X-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040EIM3X-3.0/NOPB?
All LM4040EIM3X-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040EIM3X-3.0/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 LM4040EIM3X-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040EIM3X-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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