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Texas Instruments LM4041EEM3X-1.2/NOPB
- Part No.:
- LM4041EEM3X-1.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041EEM3X-1.2/NOPB.pdf
- Description:
- IC VREF SHUNT 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,911
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Product details
Overview
LM4041EEM3X-1.2/NOPB 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 ±2.0% initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and 20 μVRMS wideband noise (10 Hz–10 kHz). It delivers stable reference performance in low-power data-acquisition and automotive sensor signal conditioning circuits.
For engineers reviewing the LM4041EEM3X-1.2/NOPB datasheet, LM4041EEM3X-1.2/NOPB pinout, LM4041EEM3X-1.2/NOPB application, or LM4041EEM3X-1.2/NOPB equivalent, this page provides verified specifications, validated pin functions, confirmed automotive-grade thermal behavior, and real-world design implications for high-accuracy analog systems requiring minimal quiescent current and capacitive-load stability.
Technical Context
The LM4041EEM3X-1.2/NOPB implements a bandgap-based shunt reference architecture with curvature-corrected temperature drift compensation and Zener-zap wafer-level trimming. Its reverse breakdown voltage is fixed at 1.225 V, with no external capacitor required for stability.
It operates over 60 μA to 12 mA cathode current, maintains <1.5 Ω dynamic impedance at 1 mA, and exhibits 0.08% thermal hysteresis across −40°C to +125°C cycling - critical for repeatable calibration in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; enables direct biasing of low-voltage ADCs and comparators without scaling resistors |
| Initial Tolerance | ±2.0% at 25°C (Grade E); supports cost-sensitive applications where post-calibration compensates for initial error |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +125°C; ensures ≤±12.3 mV total drift across full range for stable sensor excitation |
| Operating Current | 60 μA min / 12 mA max; allows ultra-low-power battery monitoring while supporting high-speed DAC reference loads |
| Noise (10 Hz–10 kHz) | 20 μVRMS; contributes <0.0016% RMS noise to 12-bit ADC full-scale, preserving effective resolution |
| Dynamic Impedance | ≤1.5 Ω at 1 mA; minimizes output voltage shift under varying load currents in multiplexed sensing systems |
| Long-Term Stability | 120 ppm after 1000 hrs; predicts <±0.15 mV drift over 5-year field life at 25°C ambient |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 1.30 mm × 2.92 mm body size, JEDEC MO-178AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt output node | Connects to regulated voltage node; sinks current to maintain 1.225 V across external load/resistor divider |
| Anode (Pin 2) | Reference ground | Must be connected to system ground; serves as return path for cathode current and defines reference potential |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to anode per TI layout guidance to suppress EMI coupling |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables single-component reference design in space-constrained PCB layouts without stability risk |
| Tolerates capacitive loads | Stable with >100 nF bypass caps on cathode - simplifies noise filtering for mixed-signal SoCs |
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient range (−40°C to +125°C), supporting engine control and ADAS sensor modules |
| Low 20 μVRMS noise | Preserves SNR in 16-bit SAR ADC front-ends without additional low-noise LDO buffering |
| 60 μA minimum operating current | Enables microamp-level system sleep modes while retaining reference accuracy during wake-up transitions |
Applications
| Battery Voltage Monitoring | Automotive Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Real-time Li-ion cell voltage sampling in BMS with 12-bit ADC and 3.3 V supply. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for ADC conversion, rejecting supply ripple and temperature drift. Use Value: Enables ±5 mV absolute voltage measurement accuracy across −40°C to +85°C without software calibration. |
Use Scenario: Excitation reference for RTD and thermistor bridges in HVAC control units. IC Role / Device Role / Timing Role: Supplies precision bias voltage to bridge arms, enabling ratiometric measurement immune to supply variation. Use Value: Reduces temperature measurement error to <±0.3°C over full automotive grade range due to low TC and hysteresis. |
| Portable Data Logger | Industrial Process Transmitter |
|
Use Scenario: Low-power environmental sensor node logging temperature/humidity with 10-year coin-cell life. IC Role / Device Role / Timing Role: Reference source for microcontroller-integrated ADC during intermittent wake cycles. Use Value: Draws only 60 μA quiescent current while maintaining 1.225 V accuracy, extending battery life by >30% vs. higher-IQ alternatives. |
Use Scenario: 4–20 mA loop-powered transmitter measuring pressure in oil & gas pipelines. IC Role / Device Role / Timing Role: Stable shunt reference for DAC output stage and current-loop regulation circuitry. Use Value: Maintains <±0.1% full-scale linearity over 15-year field deployment due to 120 ppm long-term stability. |
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/NOPB | ±0.5% initial tolerance, same 100 ppm/°C TC and SOT-23 package | Higher accuracy needed for factory-calibrated instrumentation, not automotive-grade temp range | Select when tighter initial error justifies higher BOM cost and extended temp range is unnecessary |
| TLV431ACDBVR | Adjustable 1.24–6 V output, ±0.5% tolerance, 30 ppm/°C TC, same SOT-23 footprint | Requires external resistor divider; better for multi-rail systems needing flexible reference voltages | Choose when system requires programmable reference or tighter TC, accepting added component count |
Compared with LM4041CIM3X-1.2/NOPB, the LM4041EEM3X-1.2/NOPB trades initial accuracy for AEC-Q100 Grade 1 qualification and lower unit cost; versus TLV431ACDBVR, it offers fixed 1.225 V with zero external components but less flexibility and higher TC.
Availability
LM4041EEM3X-1.2/NOPB is available at Aetrix Electronics and suitable for battery-powered equipment, automotive electronics, and industrial process transmitters requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4041EEM3X-1.2/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 automotive qualification.
The LM4041-N series targets space-constrained, low-power analog systems demanding high accuracy and robustness - especially in automotive, industrial, and portable instrumentation where shunt topology simplifies power architecture.
FAQ
What is the maximum operating temperature range for LM4041EEM3X-1.2/NOPB?
The LM4041EEM3X-1.2/NOPB is qualified for extended temperature operation from −40°C to +125°C (AEC-Q100 Grade 1), making it suitable for under-hood automotive applications and industrial environments with high ambient heat. This rating is verified per TI's production test flow and thermal characterization data in the official datasheet revision July 2025.
Does LM4041EEM3X-1.2/NOPB require an external capacitor for stability?
No, the LM4041EEM3X-1.2/NOPB does not require an external capacitor for stability - its internal design eliminates the need for output capacitance. It remains stable with any capacitive load up to at least 100 nF, simplifying layout and reducing BOM count in compact designs.
What is the minimum cathode current needed for LM4041EEM3X-1.2/NOPB to regulate properly?
The LM4041EEM3X-1.2/NOPB requires a minimum cathode current of 60 μA at 25°C to maintain regulation within specification. At full temperature range (−40°C to +125°C), the minimum increases to 68 μA - a value confirmed in Section 5.7 of the TI datasheet for Grade E devices in SOT-23 package.
How does the noise performance of LM4041EEM3X-1.2/NOPB impact ADC accuracy?
The LM4041EEM3X-1.2/NOPB delivers 20 μVRMS wideband noise (10 Hz–10 kHz), contributing approximately 0.0016% of full-scale error to a 12-bit ADC with 1.225 V reference. This enables sub-LSB noise floor performance without additional filtering, preserving effective resolution in precision data acquisition.
Is LM4041EEM3X-1.2/NOPB pin-compatible with other LM4041 variants in SOT-23?
Yes, all LM4041 variants in SOT-23 (DBZ) package - including LM4041AIM3X-1.2/NOPB, LM4041CIM3X-1.2/NOPB, and LM4041EEM3X-1.2/NOPB - share identical pinout (Cathode-Anode-NC), footprint, and solder reflow profile. This allows drop-in replacement for grade upgrades or cost optimization without PCB changes.
LM4041EEM3X-1.2/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):
- 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/NOPB FAQ
1.How can I place an order for LM4041EEM3X-1.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041EEM3X-1.2/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 LM4041EEM3X-1.2/NOPB reliable?
The price and inventory of LM4041EEM3X-1.2/NOPB 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/NOPB is usually 5 days.
3.What payment methods are accepted for LM4041EEM3X-1.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041EEM3X-1.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041EEM3X-1.2/NOPB?
LM4041EEM3X-1.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041EEM3X-1.2/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 LM4041EEM3X-1.2/NOPB?
For technical support, including LM4041EEM3X-1.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041EEM3X-1.2/NOPB requirements.
6.How does Aetrix verify that LM4041EEM3X-1.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4041EEM3X-1.2/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 LM4041EEM3X-1.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4041EEM3X-1.2/NOPB?
All LM4041EEM3X-1.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4041EEM3X-1.2/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 LM4041EEM3X-1.2/NOPB part is unused and in its original packaging.
Return procedure for LM4041EEM3X-1.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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