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Texas Instruments LM4041EEM3-1.2/NOPB
- Part No.:
- LM4041EEM3-1.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041EEM3-1.2/NOPB.pdf
- Description:
- IC VREF SHUNT 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,943
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Product details
Overview
LM4041EEM3-1.2/NOPB from Texas Instruments is a precision shunt voltage reference in SOT-23 package, delivering a fixed 1.225 V reverse breakdown voltage with ±25 mV (±2.0%) initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, 20 μVRMS wideband noise (10 Hz–10 kHz), and stable operation from 60 μA to 12 mA supply current. It serves as a compact, low-drift reference in battery-powered sensor signal chains.
For engineers reviewing the LM4041EEM3-1.2/NOPB datasheet, LM4041EEM3-1.2/NOPB pinout, LM4041EEM3-1.2/NOPB application, or LM4041EEM3-1.2/NOPB equivalent, this page delivers verified specifications, automotive-grade thermal performance (−40°C to +125°C), SOT-23 pin mapping, real-world use cases in energy metering and instrumentation, and two validated alternative parts with documented functional differences.
Technical Context
The LM4041EEM3-1.2/NOPB uses Zener-zap trimming during wafer sort to achieve ±2.0% initial accuracy and integrates bandgap curvature correction for stable voltage over temperature. Its low dynamic impedance (≤2 Ω) and capacitive-load tolerance eliminate external stabilization capacitors.
Designed for extended-temperature industrial and automotive applications, it meets AEC-Q100 Grade 1 requirements (−40°C to +125°C ambient), supports reverse breakdown operation without forward bias, and maintains 0.08% thermal hysteresis across full temperature cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal reverse breakdown voltage - sets precise bias point for ADC references or comparator thresholds |
| Initial Tolerance | ±25 mV (±2.0%) at 25°C - defines absolute accuracy before temperature drift or aging effects |
| Temp Coefficient | ±150 ppm/°C max (−40°C to +125°C) - limits voltage drift to ±18.4 mV over full operating range |
| Operating Current | 60 μA to 12 mA - enables ultra-low-power sensor nodes and high-current precision DAC buffers |
| Output Noise | 20 μVRMS (10 Hz–10 kHz) - ensures minimal contribution to system noise floor in high-resolution data acquisition |
| Dynamic Impedance | ≤2 Ω at 1 mA - provides tight load regulation and immunity to current transients in feedback loops |
| Long-Term Stability | 120 ppm after 1000 hrs - quantifies baseline drift for calibration-critical metrology applications |
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) | I/O | Shunt current path and output node - connects to regulated voltage rail; sinks current to maintain 1.225 V |
| Anode (Pin 2) | O | Reference ground terminal - must be connected to system ground; defines cathode-to-anode potential |
| NC (Pin 3) | - | No-connect terminal - must float or tie to anode per TI EMI mitigation guidance; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for −40°C to +125°C ambient operation in automotive ECUs and under-hood sensors |
| No output capacitor required | Internal compensation enables stable regulation with zero external capacitance - reduces BOM count and board area |
| Tolerates capacitive loads | Stable into ≥1 μF ceramic loads - simplifies interface with ADC input filters or op-amp buffers |
| Low 60 μA minimum current | Enables operation in micropower systems (e.g., coin-cell IoT sensors) while maintaining 1.225 V accuracy |
| 20 μVRMS noise (10 Hz–10 kHz) | Minimizes added noise in 16-bit+ SAR ADC references and precision analog front-ends |
Applications
| Portable Energy Metering | Automotive Cabin Sensors |
|---|---|
Use Scenario: High-accuracy AC voltage and current sampling in smart electricity meters powered by supercapacitors. IC Role / Device Role / Timing Role: Shunt reference for 24-bit delta-sigma ADCs measuring grid voltage with <0.1% total error budget. Use Value: ±2.0% initial tolerance and ±150 ppm/°C drift ensure meter calibration remains valid across −25°C to +70°C field environments. |
Use Scenario: Cabin temperature and humidity sensing in HVAC control modules exposed to engine bay thermal cycling. IC Role / Device Role / Timing Role: Precision bias source for thermistor and capacitive humidity sensor signal conditioning amplifiers. Use Value: AEC-Q100 Grade 1 qualification and 0.08% thermal hysteresis prevent calibration drift after repeated −40°C/+125°C thermal cycles. |
| Industrial Process Transmitters | Medical Patient Monitoring |
Use Scenario: 4–20 mA loop-powered pressure transmitters deployed in chemical plants with wide ambient swings. IC Role / Device Role / Timing Role: Stable 1.225 V reference for DAC-based current loop drivers and sensor excitation circuits. Use Value: 60 μA–12 mA operating range allows direct integration into loop-powered designs without auxiliary supplies. |
Use Scenario: Battery-operated wearable ECG monitors requiring low-noise, long-term stable analog front-end references. IC Role / Device Role / Timing Role: Low-noise voltage reference for instrumentation amplifiers and anti-aliasing filters in biopotential acquisition. Use Value: 20 μVRMS noise and 120 ppm long-term stability support clinical-grade signal fidelity over device lifetime. |
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/NOPB | ±0.5% initial tolerance (±6 mV), ±100 ppm/°C tempco - tighter accuracy but lower temperature grade (−40°C to +85°C) | Preferred for industrial data loggers where extended temperature is unnecessary and higher accuracy is critical | Select when ±6 mV absolute error at 25°C is required and ambient stays below +85°C |
| TLVH431ACDBVR | Adjustable 1.24–10 V output, ±0.5% initial tolerance, 30 ppm/°C tempco - programmable but requires external resistors | Suitable for multi-voltage systems needing one reference IC to serve multiple rails (e.g., 2.5 V, 3.3 V, 5 V) | Choose when design flexibility outweighs fixed-voltage simplicity and board space is available for two resistors |
Compared with LM4041CIM3-1.2/NOPB, the LM4041EEM3-1.2/NOPB trades initial accuracy for guaranteed −40°C to +125°C operation; compared with TLVH431ACDBVR, it eliminates resistor networks and layout sensitivity but fixes the output at 1.225 V.
Availability
LM4041EEM3-1.2/NOPB is available at Aetrix Electronics and suitable for automotive electronics, portable energy metering, and industrial process transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041EEM3-1.2/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 analog ICs and automotive-qualified components.
The LM4041-N series was designed specifically for space-constrained, high-accuracy voltage referencing in battery-powered and automotive systems where stability, low noise, and extended temperature operation are mandatory.
FAQ
What is the maximum operating temperature range for LM4041EEM3-1.2/NOPB?
The LM4041EEM3-1.2/NOPB is rated for −40°C to +125°C ambient temperature and is AEC-Q100 Grade 1 qualified. This extended range is confirmed in Section 5.7 of the TI datasheet and applies specifically to the E-grade SOT-23 variant. The LM4041EEM3-1.2/NOPB maintains its ±25 mV initial tolerance and ±150 ppm/°C temperature coefficient across this full span.
Does LM4041EEM3-1.2/NOPB require an external capacitor for stability?
No, the LM4041EEM3-1.2/NOPB does not require an external output capacitor. Its internal design provides inherent stability even with capacitive loads up to 1 μF, as stated in the "No output capacitor required" feature and verified in Figure 8-1 of the TI datasheet. This eliminates risk of oscillation and reduces bill-of-materials cost.
What is the minimum operating current for LM4041EEM3-1.2/NOPB?
The LM4041EEM3-1.2/NOPB has a minimum operating current of 60 μA at 25°C and 68 μA across −40°C to +125°C, per Section 5.7 of the TI datasheet. Below this threshold, regulation degrades and the 1.225 V output becomes unreliable - critical for ultra-low-power wake-up circuits and energy-harvesting applications.
How does the noise performance of LM4041EEM3-1.2/NOPB compare to other shunt references?
The LM4041EEM3-1.2/NOPB delivers 20 μVRMS wideband noise (10 Hz–10 kHz), matching top-tier shunt references like the LM4040. This value is measured at 100 μA operating current and is independent of grade - confirmed in Sections 5.5–5.7. It is 2× lower than typical Zener-based references and sufficient for 16-bit ADC systems.
Is LM4041EEM3-1.2/NOPB pin-compatible with LM4041CIM3-1.2/NOPB?
Yes, the LM4041EEM3-1.2/NOPB and LM4041CIM3-1.2/NOPB share identical SOT-23 (DBZ) packaging, pinout, and footprint. Both use Pin 1 (Cathode), Pin 2 (Anode), and Pin 3 (NC). However, they differ in grade-specification: C-grade offers ±0.5% tolerance but only −40°C to +85°C rating, while E-grade provides ±2.0% tolerance with −40°C to +125°C operation.
LM4041EEM3-1.2/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
LM4041EEM3-1.2/NOPB FAQ
1.How can I place an order for LM4041EEM3-1.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041EEM3-1.2/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 LM4041EEM3-1.2/NOPB reliable?
The price and inventory of LM4041EEM3-1.2/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041EEM3-1.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4041EEM3-1.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041EEM3-1.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041EEM3-1.2/NOPB?
LM4041EEM3-1.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041EEM3-1.2/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 LM4041EEM3-1.2/NOPB?
For technical support, including LM4041EEM3-1.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041EEM3-1.2/NOPB requirements.
6.How does Aetrix verify that LM4041EEM3-1.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4041EEM3-1.2/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 LM4041EEM3-1.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4041EEM3-1.2/NOPB?
All LM4041EEM3-1.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4041EEM3-1.2/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 LM4041EEM3-1.2/NOPB part is unused and in its original packaging.
Return procedure for LM4041EEM3-1.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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