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Texas Instruments LM4041EEM3X-1.2
- Part No.:
- LM4041EEM3X-1.2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041EEM3X-1.2.pdf
- Description:
- IC VREF SHUNT 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,393
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Product details
Overview
LM4041EEM3X-1.2 from Texas Instruments is a precision 1.225V shunt voltage reference in SOT-23 package, rated for extended temperature operation (−40°C to +125°C), with ±25mV initial tolerance (±2.0%), 100ppm/°C max temperature coefficient, and 20μVRMS wideband noise (10Hz–10kHz). It serves as a stable reference in high-accuracy ADCs, battery monitors, and automotive sensor signal conditioning circuits.
For engineers reviewing the LM4041EEM3X-1.2 datasheet, LM4041EEM3X-1.2 pinout, LM4041EEM3X-1.2 application, or LM4041EEM3X-1.2 equivalent, key selection criteria include reverse breakdown voltage accuracy over temperature, minimum operating current (60μA), dynamic impedance (≤2Ω), capacitive load stability, and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4041EEM3X-1.2 uses a bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. It operates as a two-terminal device where cathode carries both shunt current and output voltage, while anode is typically grounded - eliminating need for external output capacitor.
Its design supports stable regulation across 60μA–12mA operating current range and tolerates arbitrary capacitive loads without oscillation. The E-grade variant targets cost-sensitive industrial and automotive applications requiring robustness over extended temperature range without A-grade precision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V nominal reverse breakdown voltage at 100μA test current |
| Initial Tolerance | ±25mV (±2.0%) at 25°C - defines baseline accuracy before thermal and load effects |
| Temp Coefficient | ≤100ppm/°C over −40°C to +125°C - limits voltage drift across full operating range |
| Min Operating Current | 60μA at 25°C - enables ultra-low-power operation in battery-backed systems |
| Dynamic Impedance | ≤2Ω at 1mA, 120Hz - ensures minimal load-induced voltage variation |
| Output Noise | 20μVRMS (10Hz–10kHz) - critical for high-resolution data acquisition front-ends |
| Long-Term Stability | 120ppm after 1000 hours - quantifies aging-related drift in mission-critical systems |
Pinout & Package
LM4041EEM3X-1.2 is housed in a 3-pin SOT-23 (DBZ) package with 1.30mm × 2.92mm body size. Pin 1 is Cathode (I/O), Pin 2 is Anode (O, normally grounded), and Pin 3 is NC (no connect, must float or tie to anode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Cathode) | Shunt current path and output node | Carries all reference current; voltage appears between this pin and anode |
| Pin 2 (Anode) | Reference ground reference | Typically connected to system ground; defines 0V reference for output voltage |
| Pin 3 (NC) | No internal connection | Must remain unconnected or tied to anode to avoid EMI sensitivity in noisy environments |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables space-constrained PCB layouts and eliminates capacitor-related aging or ESR instability |
| Tolerates capacitive loads | Supports direct connection to ADC input caps or long traces without phase-margin loss |
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient temperatures (−40°C to +125°C) per stress test requirements |
| Low 20μVRMS noise | Preserves ENOB in 16-bit+ SAR ADCs without additional filtering overhead |
| 60μA minimum operating current | Extends battery life in portable instrumentation and wireless sensor nodes |
Applications
| Battery Voltage Monitoring | Automotive Cabin Sensor Interface |
|---|---|
|
Use Scenario: Real-time Li-ion cell voltage sampling in BMS modules with 12-bit+ resolution. IC Role / Device Role / Timing Role: Provides stable 1.225V reference for ADC conversion of battery stack voltages. Use Value: Enables ±0.5% state-of-charge accuracy over full temperature range due to 100ppm/°C tempco and low noise. |
Use Scenario: Signal conditioning for NTC-based cabin temperature sensors in HVAC control units. IC Role / Device Role / Timing Role: Supplies precision bias voltage for ratiometric sensor excitation and ADC reference. Use Value: Maintains <±1°C measurement accuracy across −40°C to +125°C ambient via AEC-Q100 Grade 1 qualification. |
| Industrial Process Transmitter | Energy Metering Front-End |
|
Use Scenario: 4–20mA loop-powered pressure transmitter with integrated analog-to-digital conversion. IC Role / Device Role / Timing Role: Serves as shunt reference for DAC output scaling and ADC calibration voltage. Use Value: Delivers 120ppm long-term stability to meet IEC 61000-4-30 Class A accuracy requirements over 10-year field life. |
Use Scenario: Polyphase electricity meter using metrology-grade ADCs for revenue-grade kWh measurement. IC Role / Device Role / Timing Role: Supplies low-noise, thermally stable reference for current/voltage channel ADCs. Use Value: 20μVRMS noise and ≤2Ω dynamic impedance prevent gain error drift under varying load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4041CIM3X-1.2 | ±6mV (±0.5%) initial tolerance, same 100ppm/°C tempco and SOT-23 package | Higher-accuracy alternative for non-automotive industrial designs requiring tighter initial calibration | Select when ±0.5% room-temperature accuracy is mandatory and extended-temp operation is secondary |
| TLVH431ACDBVR | Adjustable 1.24–18V output, 2% initial tolerance, 100ppm/°C tempco, 3-pin SOT-23 | Offers programmability but lacks fixed 1.225V option and has higher noise (45μVRMS) | Choose only if adjustable reference voltage is required; not drop-in compatible due to different pinout and FB functionality |
Compared with LM4041CIM3X-1.2, the LM4041EEM3X-1.2 trades initial accuracy for lower cost and AEC-Q100 qualification; versus TLVH431ACDBVR, it provides fixed 1.225V output with half the noise and guaranteed shunt stability - critical for metrology-grade sensing.
Availability
LM4041EEM3X-1.2 is available at Aetrix Electronics and suitable for battery-powered equipment, automotive electronics, and energy metering applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041EEM3X-1.2 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 LM4041-N series was developed to deliver micro-power, high-accuracy shunt references for space-constrained and thermally demanding applications including automotive sensor interfaces and portable instrumentation.
FAQ
What is the maximum operating current for LM4041EEM3X-1.2?
The LM4041EEM3X-1.2 supports a maximum operating current of 12mA, enabling use in higher-current reference applications such as driving multiple op-amp bias networks or powering small logic sections. This rating is valid across its full −40°C to +125°C operating range and aligns with its 306mW power dissipation limit in the SOT-23 package.
Does LM4041EEM3X-1.2 require an external capacitor for stability?
No, the LM4041EEM3X-1.2 does not require an external output capacitor. Its internal design ensures unconditional stability with any capacitive load, including direct connection to ADC input capacitors or long PCB traces - simplifying layout and reducing BOM count.
Is LM4041EEM3X-1.2 qualified for automotive applications?
Yes, LM4041EEM3X-1.2 is AEC-Q100 Grade 1 qualified, meaning it is tested and certified for operation in automotive ambient temperatures from −40°C to +125°C. This makes it suitable for engine bay, cabin, and ADAS subsystems where reliability under thermal stress is mandatory.
What is the thermal hysteresis specification for LM4041EEM3X-1.2?
The LM4041EEM3X-1.2 exhibits 0.08% thermal hysteresis - defined as the voltage difference measured at +25°C after cycling to −40°C versus after cycling to +125°C. This low hysteresis ensures repeatable reference performance during thermal cycling in industrial and automotive environments.
Can LM4041EEM3X-1.2 be used in adjustable-output configurations?
No, LM4041EEM3X-1.2 is a fixed 1.225V shunt reference. Adjustable versions (e.g., LM4041AIM3X-ADJ) use a separate feedback (FB) pin and different pinout. Attempting to configure LM4041EEM3X-1.2 as adjustable will not yield stable operation due to missing internal FB path and NC pin assignment.
LM4041EEM3X-1.2 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:
- Not For New Designs
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.225V
- Voltage - Output (Max):
- -
- Current - Output:
- 12 mA
- Tolerance:
- ±2%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041EEM3X-1.2 FAQ
1.How can I place an order for LM4041EEM3X-1.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041EEM3X-1.2 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 LM4041EEM3X-1.2 reliable?
The price and inventory of LM4041EEM3X-1.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041EEM3X-1.2 is usually 5 days.
3.What payment methods are accepted for LM4041EEM3X-1.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041EEM3X-1.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041EEM3X-1.2?
LM4041EEM3X-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041EEM3X-1.2 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 LM4041EEM3X-1.2?
For technical support, including LM4041EEM3X-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041EEM3X-1.2 requirements.
6.How does Aetrix verify that LM4041EEM3X-1.2 is sourced from the original manufacturer or authorized distributors?
All LM4041EEM3X-1.2 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 LM4041EEM3X-1.2 meets industry standards.
7.What is the process for return or replacement of LM4041EEM3X-1.2?
All LM4041EEM3X-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041EEM3X-1.2, 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 LM4041EEM3X-1.2 part is unused and in its original packaging.
Return procedure for LM4041EEM3X-1.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041EEM3X-1.2 Tags
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