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Texas Instruments LM4041EEM3-1.2
- Part No.:
- LM4041EEM3-1.2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041EEM3-1.2.pdf
- Description:
- IC VREF SHUNT 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,623
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Product details
Overview
LM4041EEM3-1.2 from Texas Instruments is a precision 1.225 V shunt voltage reference in SOT-23 package, rated for extended temperature operation (−40°C to +125°C), with ±25 mV (±2.0%) initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and 20 μVRMS wideband noise (10 Hz–10 kHz). It serves as a stable reference in high-accuracy analog signal chains for battery-powered instrumentation.
For engineers reviewing the LM4041EEM3-1.2 datasheet, LM4041EEM3-1.2 pinout, LM4041EEM3-1.2 application, or LM4041EEM3-1.2 equivalent, key selection criteria include extended-temperature-grade shunt reference stability, low quiescent current (60 μA min), no-output-capacitor operation, capacitive-load tolerance, and automotive-qualified variants (LM4041-N-Q1).
Technical Context
The LM4041EEM3-1.2 uses Zener-zap trimmed bandgap architecture with curvature-corrected temperature drift compensation, enabling stable 1.225 V reverse breakdown across −40°C to +125°C. Its dynamic impedance is ≤2 Ω at 1 mA, supporting tight load regulation under varying current conditions (60 μA–12 mA).
Designed as a 3-terminal shunt device, it operates without external stabilization capacitors and maintains stability with any capacitive load - eliminating layout sensitivity common in series references. The SOT-23 package supports space-constrained PCBs while delivering thermal resistance of 291.9°C/W (junction-to-ambient).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; fixed shunt reference voltage, stable over full operating current and temperature range |
| Initial Tolerance | ±25 mV (±2.0%) at 25°C; defines worst-case deviation before temperature or aging effects |
| Temp Coefficient | ≤150 ppm/°C (max); limits voltage drift over −40°C to +125°C ambient, critical for automotive/metering |
| Operating Current | 60 μA to 12 mA; ultra-low minimum enables micro-power systems; high max supports robust load drive |
| Noise (10Hz–10kHz) | 20 μVRMS; low-noise performance suitable for 16-bit+ ADC reference and precision DAC biasing |
| Dynamic Impedance | ≤2 Ω at 1 mA; ensures minimal output voltage shift during load transients in feedback loops |
| Long-Term Stability | 120 ppm (1000 hrs); quantifies parametric drift under continuous bias, relevant for calibration-critical designs |
Pinout & Package
LM4041EEM3-1.2 is housed in a 3-pin SOT-23 (DBZ) package (1.30 mm × 2.92 mm), with anode grounded, cathode delivering shunt current and output voltage, and pin 3 unconnected (NC) - must float or connect to anode per EMI guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | I/O | Shunt current path and output node; connects to regulated voltage rail via series resistor |
| Anode (Pin 2) | O | Ground reference terminal; must be connected to system ground for proper biasing |
| NC (Pin 3) | - | No-connect; floating or tied to anode to reduce EMI susceptibility near switching noise sources |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into compact layouts without stability-compromising external components |
| Tolerates capacitive loads | Supports direct connection to ADC input caps or op-amp feedback networks without oscillation risk |
| AEC-Q100 Grade 1 qualified | Validated for automotive applications with −40°C to +125°C ambient operation and reliability testing |
| Low 60 μA minimum operating current | Extends battery life in portable equipment while maintaining reference accuracy |
| Reverse breakdown voltage option: 1.225 V | Matches low-voltage system rails (e.g., 1.8 V, 2.5 V domains) without level-shifting circuitry |
Applications
| Battery-Powered Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Portable multimeter or handheld sensor logger operating from single-cell Li-ion (2.7–4.2 V) with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225 V reference for ADC full-scale calibration and offset trimming. Use Value: Enables <1 LSB error over temperature due to 150 ppm/°C TC and 20 μVRMS noise, extending field calibration intervals. | Use Scenario: Industrial PLC analog input module digitizing 4–20 mA loop signals with cold-junction compensation. IC Role / Device Role / Timing Role: Precision reference for programmable gain instrumentation amplifier and sigma-delta ADC front-end. Use Value: Maintains <±0.1% total unadjusted error across −40°C to +85°C using Grade E's verified extended-temp specs. |
| Automotive Body Control Module | Energy Metering Hardware |
Use Scenario: In-vehicle cabin temperature/humidity sensor node with CAN interface and microcontroller ADC. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 shunt reference powering sensor signal conditioning and MCU internal ADC reference. Use Value: Qualified for automotive ambient range (−40°C to +125°C) with 120 ppm long-term stability, reducing recalibration needs. | Use Scenario: DIN-rail mounted kWh meter requiring metrology-grade accuracy per IEC 62053-21 Class 0.5S. IC Role / Device Role / Timing Role: Reference source for anti-aliasing filter biasing and polyphase energy measurement IC reference inputs. Use Value: Low 20 μVRMS noise and 2 Ω dynamic impedance minimize measurement uncertainty in sub-100 μV RMS 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 |
|---|---|---|---|
| LM4041CIM3-1.2 | ±0.5% (±6 mV) initial tolerance; 100 ppm/°C max TC; industrial temp range (−40°C to +85°C) | Suitable for non-automotive industrial systems where tighter initial accuracy is prioritized over extended temperature coverage | Select when higher initial accuracy is needed and ambient stays below +85°C |
| TLVH431ACDBVR | Adjustable 1.24–18 V output; ±0.5% initial tolerance; 100 ppm/°C TC; SOT-23 package; requires external resistors | Used where programmable reference voltage or higher output voltage (>1.225 V) is required | Choose for flexible output setting or when 1.24 V minimum reference is acceptable |
Compared with LM4041CIM3-1.2, the LM4041EEM3-1.2 trades initial accuracy for guaranteed operation up to +125°C and automotive qualification; versus TLVH431ACDBVR, it offers fixed 1.225 V with zero external components but lacks adjustability.
Availability
LM4041EEM3-1.2 is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive body control modules, and energy metering hardware requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041EEM3-1.2 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 analog ICs and automotive-qualified components.
The LM4041-N product line delivers micro-power shunt voltage references optimized for space-constrained, high-reliability applications including automotive electronics, portable instrumentation, and industrial process control.
FAQ
What is the maximum operating temperature range for LM4041EEM3-1.2?
The LM4041EEM3-1.2 is rated for extended temperature operation from −40°C to +125°C ambient, meeting AEC-Q100 Grade 1 requirements. This specification is validated per TI's LM4041-N-Q1 qualification test plan and applies specifically to the E-grade SOT-23 variant. Operation outside this range may result in parametric degradation or failure.
Does LM4041EEM3-1.2 require an external output capacitor?
No, the LM4041EEM3-1.2 does not require an external output capacitor. Its internal design provides inherent stability across its full operating current range (60 μA to 12 mA) and remains stable with any capacitive load - a key advantage over many series references. This eliminates board area, cost, and reliability risks associated with external capacitors.
What is the minimum cathode current needed for LM4041EEM3-1.2 to regulate properly?
The LM4041EEM3-1.2 requires a minimum cathode current of 60 μA at 25°C to maintain regulation within specifications. At full temperature range (−40°C to +125°C), the minimum increases to 73 μA. Below this threshold, the device exits regulation and output voltage collapses toward forward diode drop.
How does the LM4041EEM3-1.2 differ from the LM4041AIM3-1.2?
The LM4041EEM3-1.2 features ±2.0% (±25 mV) initial tolerance and 150 ppm/°C max temperature coefficient over −40°C to +125°C, whereas the LM4041AIM3-1.2 offers ±0.1% (±1.2 mV) tolerance and 100 ppm/°C TC over −40°C to +85°C. The E-grade prioritizes extended temperature coverage and automotive qualification over initial accuracy.
Is LM4041EEM3-1.2 pin-compatible with other LM4041 variants in SOT-23?
Yes, all LM4041 SOT-23 variants - including LM4041EEM3-1.2, LM4041AIM3-1.2, and LM4041CIM3-1.2 - share identical pinout (cathode/anode/NC) and mechanical footprint. This allows direct substitution in existing layouts when grade or temperature range changes are acceptable per system requirements.
LM4041EEM3-1.2 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
LM4041EEM3-1.2 FAQ
1.How can I place an order for LM4041EEM3-1.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041EEM3-1.2 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 LM4041EEM3-1.2 reliable?
The price and inventory of LM4041EEM3-1.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041EEM3-1.2 is usually 5 days.
3.What payment methods are accepted for LM4041EEM3-1.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041EEM3-1.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041EEM3-1.2?
LM4041EEM3-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041EEM3-1.2 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 LM4041EEM3-1.2?
For technical support, including LM4041EEM3-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041EEM3-1.2 requirements.
6.How does Aetrix verify that LM4041EEM3-1.2 is sourced from the original manufacturer or authorized distributors?
All LM4041EEM3-1.2 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 LM4041EEM3-1.2 meets industry standards.
7.What is the process for return or replacement of LM4041EEM3-1.2?
All LM4041EEM3-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041EEM3-1.2, 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 LM4041EEM3-1.2 part is unused and in its original packaging.
Return procedure for LM4041EEM3-1.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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