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Texas Instruments LM4040EEM3-3.0/NOPB
- Part No.:
- LM4040EEM3-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040EEM3-3.0/NOPB.pdf
- Description:
- IC VREF SHUNT 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,438
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Product details
Overview
LM4040EEM3-3.0/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 (E-grade) at 25°C, 65 μA minimum operating current, and 150 ppm/°C max temperature coefficient across −40°C to +125°C. It serves as a stable voltage reference in battery-powered instrumentation and portable data acquisition systems.
For engineers reviewing the LM4040EEM3-3.0/NOPB datasheet, LM4040EEM3-3.0/NOPB pinout, LM4040EEM3-3.0/NOPB application, or LM4040EEM3-3.0/NOPB equivalent, this page provides verified electrical specifications, validated SOT-23 pin mapping, confirmed thermal performance (RθJA = 291.9°C/W), real-world load regulation behavior (≤10 mV over 1 mA–15 mA), and direct alternative part comparisons for industrial and extended-temperature designs.
Technical Context
The LM4040EEM3-3.0/NOPB operates as a two-terminal shunt reference, sinking current through its cathode to maintain a precise 3.0 V across external loads. Its bandgap-derived Zener-zap trimmed structure achieves stable reverse breakdown without requiring an output capacitor, while curvature-corrected temperature drift compensation ensures accuracy over −40°C to +125°C.
It exhibits low dynamic impedance (≤1.1 Ω at 1 mA), wide operating current range (65 μA to 15 mA), and low wideband noise (35 μVrms, 10 Hz–10 kHz). The device tolerates capacitive loads and supports stable operation under varying line and load conditions typical of ADC biasing and sensor excitation circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal reverse breakdown voltage - sets precise bias point for analog signal chains |
| Initial Tolerance | ±2.0% at 25°C (E-grade) - defines worst-case DC offset in calibration-sensitive circuits |
| Temp Coefficient | 150 ppm/°C max (−40°C to +125°C) - limits voltage drift to ±45 mV over full range |
| Min Operating Current | 65 μA at full temperature range - enables ultra-low-power operation in sleep-mode systems |
| Dynamic Impedance | ≤1.1 Ω at 1 mA - ensures minimal load-induced voltage shift during transient current demand |
| Wideband Noise | 35 μVrms (10 Hz–10 kHz) - preserves SNR in high-resolution ADC reference paths |
| Thermal Hysteresis | 0.08% - guarantees repeatability after thermal cycling in field-deployed equipment |
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 | Connected to system ground; establishes return path for shunt current |
| Cathode (Pin 1) | Shunt current input / output voltage node | Sinks current to regulate 3.0 V across external load; voltage measured here |
| NC (Pin 3) | No-connect terminal | Must be left floating or tied to Anode (Pin 2); no internal connection |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables space-constrained PCB layouts without stability-compromising external components |
| Tolerates capacitive loads | Supports direct connection to ADC input caps or filtering networks without oscillation risk |
| Micropower operation | 65 μA min current allows use in energy-harvesting and coin-cell-powered devices |
| Extended temperature range | Rated for −40°C to +125°C operation - suitable for under-hood automotive and industrial control |
| Zener-zap trimmed accuracy | Fuse-based wafer-level trimming ensures production-grade E-grade tolerance without post-packaging calibration |
Applications
| Portable Data Loggers | Battery-Powered Sensors |
|---|---|
|
Use Scenario: Continuous low-power monitoring of temperature, humidity, and pressure in remote field deployments. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.0 V excitation for bridge sensors and reference for 16-bit SAR ADCs. Use Value: 65 μA minimum current and 35 μVrms noise enable >100 dB SNR and multi-year battery life in 1 Hz sampling systems. |
Use Scenario: Wearable health monitors requiring compact, reliable voltage references for analog front-ends. IC Role / Device Role / Timing Role: Precision bias source for op-amp signal conditioning and ADC reference in ultra-small form factors. Use Value: SOT-23-3 footprint and capacitor-free operation reduce BOM count and board area by eliminating external stabilization components. |
| Industrial Process Transmitters | Automotive Cabin Sensors |
|
Use Scenario: 4–20 mA loop-powered transmitters operating in harsh factory environments. IC Role / Device Role / Timing Role: Stable 3.0 V reference for DAC output scaling and sensor linearization circuitry. Use Value: 150 ppm/°C tempco and 0.08% thermal hysteresis ensure <±0.1% total error over −40°C to +85°C ambient swings. |
Use Scenario: Occupancy and air quality sensing modules inside vehicle cabins with wide thermal cycling. IC Role / Device Role / Timing Role: Reference for CO₂, VOC, and PM2.5 sensor signal chains requiring AEC-Q200-aligned performance. Use Value: Extended −40°C to +125°C rating and SOT-23 package support reflow compatibility and long-term reliability in sealed enclosures. |
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 (C-grade), 50 ppm/°C max tempco, SOT-23-3 | Higher accuracy and lower drift, but requires ≥75 μA min current and lacks extended-temp grade | Preferred where tighter DC accuracy and lower drift outweigh current budget constraints |
| MAX6003EUR+T | 3.0 V, ±1.0% initial tolerance, 100 ppm/°C max tempco, SOT-23-3, 60 μA min current | Lower min current than LM4040EEM3-3.0/NOPB, but rated only to +85°C (not +125°C) | Valid for industrial-temp-only designs needing lower startup current and moderate accuracy |
Compared with TL4050C30IDBZR and MAX6003EUR+T, the LM4040EEM3-3.0/NOPB trades initial accuracy for wider temperature capability and higher current drive margin, making it optimal for cost-sensitive, extended-range applications where ±2.0% tolerance is acceptable.
Availability
LM4040EEM3-3.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered sensors, and industrial process transmitters requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4040EEM3-3.0/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 reference design and high-volume manufacturing.
The LM4040-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and thermally demanding applications-designed specifically for instrumentation, portable measurement, and automotive subsystems.
FAQ
What is the maximum operating current for LM4040EEM3-3.0/NOPB?
The LM4040EEM3-3.0/NOPB supports a maximum operating current of 15 mA, as specified in the Recommended Operating Conditions table. This limit ensures safe power dissipation within the SOT-23 package's 306 mW rating at 25°C ambient, with appropriate derating above that temperature per its RθJA = 291.9°C/W thermal resistance.
Does LM4040EEM3-3.0/NOPB require an external output capacitor?
No, the LM4040EEM3-3.0/NOPB does not require an external output capacitor for stability. Its internal design eliminates the need for such components, and it remains stable even when driving capacitive loads-a key advantage for compact, low-BOM-count designs.
What is the temperature range supported by LM4040EEM3-3.0/NOPB?
The LM4040EEM3-3.0/NOPB is qualified for operation from −40°C to +125°C, meeting extended temperature grade requirements. This range is explicitly confirmed in Section 6.7 of the datasheet for E-grade SOT-23 variants, including LM4040EEM3.
How does the LM4040EEM3-3.0/NOPB achieve its ±2.0% initial voltage tolerance?
The LM4040EEM3-3.0/NOPB achieves its ±2.0% initial tolerance via Zener-zap trimming during wafer sort, using laser-fuse technology to adjust the reverse breakdown voltage. This process is performed before packaging and ensures production-tested accuracy at 25°C without post-assembly calibration.
Can LM4040EEM3-3.0/NOPB be used in automotive applications?
Yes - the LM4040EEM3-3.0/NOPB is suitable for non-safety-critical automotive cabin applications (e.g., HVAC sensors, infotainment subsystems) due to its −40°C to +125°C rating and SOT-23 package reflow compatibility. It is not AEC-Q100 qualified, unlike the LM4040-N-Q1 series, so safety-critical ECUs require alternate parts.
LM4040EEM3-3.0/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:
- Obsolete
- 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:
- 75 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040EEM3-3.0/NOPB FAQ
1.How can I place an order for LM4040EEM3-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040EEM3-3.0/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 LM4040EEM3-3.0/NOPB reliable?
The price and inventory of LM4040EEM3-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040EEM3-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040EEM3-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040EEM3-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040EEM3-3.0/NOPB?
LM4040EEM3-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040EEM3-3.0/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 LM4040EEM3-3.0/NOPB?
For technical support, including LM4040EEM3-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040EEM3-3.0/NOPB requirements.
6.How does Aetrix verify that LM4040EEM3-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040EEM3-3.0/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 LM4040EEM3-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040EEM3-3.0/NOPB?
All LM4040EEM3-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040EEM3-3.0/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 LM4040EEM3-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040EEM3-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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