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Texas Instruments LM4041EIM3X-1.2/NOPB
- Part No.:
- LM4041EIM3X-1.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041EIM3X-1.2/NOPB.pdf
- Description:
- IC VREF SHUNT 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,600
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Product details
Overview
LM4041EIM3X-1.2/NOPB from Texas Instruments is a precision 1.225 V shunt voltage reference in SOT-23-3 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 serves as a stable voltage reference in high-accuracy analog signal chains for battery-powered instrumentation.
For engineers reviewing the LM4041EIM3X-1.2/NOPB datasheet, LM4041EIM3X-1.2/NOPB pinout, LM4041EIM3X-1.2/NOPB application, or LM4041EIM3X-1.2/NOPB equivalent, key selection criteria include its extended-temperature-grade shunt topology, no-output-capacitor requirement, capacitive-load tolerance, 60 μA minimum operating current, and automotive qualification per AEC-Q100 Grade 1.
Technical Context
The LM4041EIM3X-1.2/NOPB implements a bandgap-based shunt reference architecture with curvature-corrected temperature drift compensation and Zener-zap wafer-level trimming to achieve ±2.0% initial accuracy. Its dynamic impedance remains below 2 Ω across 1 mA operating current, enabling stable regulation under varying load conditions.
It operates as a two-terminal device: cathode supplies shunt current and defines output voltage, while anode connects to system ground. The third pin (NC) must float or tie to anode per TI layout guidance for EMI-sensitive environments - no feedback network or external adjustment is used in the fixed 1.225 V configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; fixed value, no external resistor network required |
| Initial Tolerance | ±2.0% at 25°C (E-grade); translates to ±24.5 mV absolute error |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +125°C; ensures ≤±12.25 mV drift across full range |
| Min Operating Current | 60 μA; enables ultra-low-power operation in sleep-mode sensor interfaces |
| Dynamic Impedance | ≤2 Ω at 1 mA; maintains output stability against fast load transients |
| Output Noise | 20 μVRMS (10 Hz–10 kHz); suitable for 16-bit ADC reference without added filtering |
| Long-Term Stability | 120 ppm after 1000 hrs; supports calibration integrity in field-deployed meters |
Pinout & Package
SOT-23-3 package (DBZ), 1.30 mm × 2.92 mm body size, with gull-wing leads. Pin 1 = Cathode (I/O), Pin 2 = Anode (O, grounded), Pin 3 = NC (no connect; must float or tie to anode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Shunt current path and output node | Connects to regulated voltage rail; sinks all excess current to maintain 1.225 V |
| 2 (Anode) | Reference ground terminal | Must be connected to system ground; forms return path for shunt current |
| 3 (NC) | No-connect terminal | Not internally bonded; floating or tied to anode improves EMI immunity near switching noise sources |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into space-constrained PCB layouts without stability-compensation components |
| Tolerates capacitive loads | Stable with >100 nF output capacitance - eliminates need for series resistance or isolation |
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient temperatures (−40°C to +125°C), supporting engine control and ADAS modules |
| Low 60 μA minimum current | Permits use in always-on monitoring circuits powered by coin cells or energy harvesters |
| 20 μVRMS noise floor | Meets SNR requirements for precision 16-bit SAR ADCs without additional low-noise LDO staging |
Applications
| Portable Energy Meters | Automotive Cabin Sensors |
|---|---|
Use Scenario: Battery-powered smart electricity meters measuring voltage with 0.1% accuracy over 10-year field life. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for 24-bit delta-sigma ADC front-end, compensating for battery voltage decay. Use Value: 100 ppm/°C tempco and 120 ppm long-term drift ensure calibration retention without periodic field recalibration. | Use Scenario: Occupant detection systems using capacitive sensing in automotive seats under extreme cabin temperatures. IC Role / Device Role / Timing Role: Supplies reference voltage to analog front-end comparators and sigma-delta modulators in seat occupancy modules. Use Value: AEC-Q100 Grade 1 rating and −40°C to +125°C operation guarantee functional safety compliance across global vehicle fleets. |
| Industrial Loop-Powered Transmitters | Medical Patient Monitoring |
Use Scenario: 4–20 mA current-loop transmitters converting RTD or thermocouple signals in hazardous-area process plants. IC Role / Device Role / Timing Role: Acts as precision excitation and reference source for bridge sensors and ADCs within <4 mA total quiescent budget. Use Value: 60 μA min operating current allows full functionality even when loop power drops to 3.5 mA during brownout events. | Use Scenario: Portable ECG monitors requiring clinical-grade signal fidelity from dry-electrode amplifiers. IC Role / Device Role / Timing Role: Delivers ultra-low-noise 1.225 V reference to 16-bit ADC sampling at 1 kSPS for ST-segment analysis. Use Value: 20 μVRMS noise directly supports ≥86 dB SNR, meeting IEC 60601-2-27 diagnostic accuracy thresholds. |
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 (C-grade), same 100 ppm/°C tempco and SOT-23-3 package | Better accuracy for calibration-critical lab equipment; higher cost and tighter test screening | Select when absolute initial error must be ≤±6.1 mV at 25°C |
| TLVH431ACDBVR | Adjustable 1.24–18 V output via resistive divider; 2% initial tolerance; 100 ppm/°C tempco; SOT-23-3 | Supports programmable references but adds two external resistors and sensitivity to resistor tolerance/TC | Choose when system requires multiple reference voltages or post-PCB tuning capability |
Compared with LM4041CIM3X-1.2/NOPB, the LM4041EIM3X-1.2/NOPB trades initial accuracy for lower cost and broader production yield, while TLVH431ACDBVR offers flexibility at the expense of BOM count and layout sensitivity to parasitic effects.
Availability
LM4041EIM3X-1.2/NOPB is available at Aetrix Electronics and suitable for portable energy meters, automotive cabin sensors, industrial loop-powered transmitters, and medical patient monitoring systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4041EIM3X-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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive-grade components.
The LM4041-N family was designed for space-constrained, high-accuracy voltage referencing in battery-powered and automotive systems where stability, low power, and qualification rigor are mandatory.
FAQ
What is the maximum operating current for LM4041EIM3X-1.2/NOPB?
The LM4041EIM3X-1.2/NOPB supports a maximum operating current of 12 mA. This limit ensures safe power dissipation within the SOT-23 package's 306 mW rating at 25°C ambient. Exceeding this current risks thermal overload and long-term reliability degradation. Designers must verify worst-case power (1.225 V × ISHUNT) stays below derated limits at elevated temperatures.
Does LM4041EIM3X-1.2/NOPB require an external capacitor for stability?
No, the LM4041EIM3X-1.2/NOPB does not require an external output capacitor for stability. Its internal design provides inherent phase margin across all capacitive loads up to at least 100 nF. This eliminates capacitor-related aging, microphonics, and board area consumption - a key advantage over older shunt references like TL431.
Is LM4041EIM3X-1.2/NOPB qualified for automotive applications?
Yes, LM4041EIM3X-1.2/NOPB is AEC-Q100 qualified as Grade 1 (−40°C to +125°C ambient), making it suitable for automotive powertrain, chassis, and body electronics. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and ESD - confirmed in TI's official LM4041-N-Q1 documentation.
What is the function of Pin 3 (NC) on LM4041EIM3X-1.2/NOPB?
Pin 3 on LM4041EIM3X-1.2/NOPB is a no-connect terminal with no internal bond wire. TI recommends leaving it floating or connecting it to the anode (Pin 2) to reduce EMI susceptibility in noisy environments such as near DC-DC converters or motor drivers. It must never be driven or biased externally.
How does the temperature coefficient affect accuracy of LM4041EIM3X-1.2/NOPB over −40°C to +125°C?
With a maximum temperature coefficient of 100 ppm/°C, the LM4041EIM3X-1.2/NOPB contributes up to ±12.25 mV (±1.0%) additional error across its full operating range beyond its ±2.0% initial tolerance. Total worst-case error is therefore ±3.0% (±36.75 mV), verified in TI's extended-temperature electrical characteristics tables for E-grade devices.
LM4041EIM3X-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:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041EIM3X-1.2/NOPB FAQ
1.How can I place an order for LM4041EIM3X-1.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041EIM3X-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 LM4041EIM3X-1.2/NOPB reliable?
The price and inventory of LM4041EIM3X-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 LM4041EIM3X-1.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4041EIM3X-1.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041EIM3X-1.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041EIM3X-1.2/NOPB?
LM4041EIM3X-1.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041EIM3X-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 LM4041EIM3X-1.2/NOPB?
For technical support, including LM4041EIM3X-1.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041EIM3X-1.2/NOPB requirements.
6.How does Aetrix verify that LM4041EIM3X-1.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4041EIM3X-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 LM4041EIM3X-1.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4041EIM3X-1.2/NOPB?
All LM4041EIM3X-1.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4041EIM3X-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 LM4041EIM3X-1.2/NOPB part is unused and in its original packaging.
Return procedure for LM4041EIM3X-1.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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