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Texas Instruments LM4041CEM3X-1.2/NOPB
- Part No.:
- LM4041CEM3X-1.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CEM3X-1.2/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,093
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Product details
Overview
LM4041CEM3X-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 ±0.5% 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 LM4041CEM3X-1.2/NOPB datasheet, LM4041CEM3X-1.2/NOPB pinout, LM4041CEM3X-1.2/NOPB application, or LM4041CEM3X-1.2/NOPB equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade thermal performance, and real-world application context - all aligned to TI's production data sheet SNOS641I (Rev. July 2025).
Technical Context
The LM4041CEM3X-1.2/NOPB implements a bandgap-based shunt architecture with curvature-corrected temperature drift compensation and Zener-zap wafer-level trimming. Its reverse breakdown configuration requires an external current source and operates without output capacitance, maintaining stability across capacitive loads up to 10 nF.
It supports fixed 1.225 V output via cathode-anode terminal configuration, with no feedback pin required. The device achieves ±0.5% accuracy at 25°C (Grade C) and maintains ≤±18.4 mV total error over −40°C to +125°C, validated per AEC-Q100 Grade 1 requirements for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; enables precise ADC/DAC biasing and sensor excitation at low headroom |
| Initial Tolerance | ±0.5% at 25°C (6 mV absolute); meets Grade C specification for cost-sensitive precision systems |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +125°C; ensures <±0.15% output drift across full automotive range |
| Operating Current | 60 μA min to 12 mA max; supports ultra-low-power sensor nodes and high-current reference buffering |
| Output Noise | 20 μVRMS (10 Hz–10 kHz); suitable for 16-bit+ data acquisition without added filtering |
| Dynamic Impedance | 1.5 Ω max at 1 mA; minimizes load-induced voltage shift in varying current conditions |
| Long-Term Stability | 120 ppm after 1000 hrs; supports 10+ year field reliability in metering and industrial control |
Pinout & Package
SOT-23 (DBZ) 3-pin surface-mount package: 1.30 mm × 2.92 mm body, gull-wing leads, JEDEC MO-178 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode | Shunt output node | Connects to regulated voltage node; sinks current to maintain 1.225 V across external load/resistor |
| Anode | Reference ground | Must be tied to system ground; forms return path for shunt current and defines output reference point |
| NC | No-connect | Internally unconnected; must remain floating or tied to anode per TI layout guidance for EMI immunity |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Eliminates BOM cost and board space for stability; simplifies layout in space-constrained modules |
| Tolerates capacitive loads | Stable with up to 10 nF directly at cathode; enables direct interface to ADC input caps and long traces |
| AEC-Q100 Grade 1 qualified | Validated for −40°C to +125°C ambient; certified for engine control, ADAS, and powertrain applications |
| Low 60 μA minimum operating current | Enables operation from microamp-level bias sources; ideal for wake-up circuits and energy-harvesting systems |
| 20 μVRMS noise (10 Hz–10 kHz) | Supports 16-bit effective resolution without post-filtering; reduces firmware complexity in portable test gear |
Applications
| Battery-Powered Equipment | Data-Acquisition Systems |
|---|---|
Use Scenario: Portable multimeter with 3.3 V supply and 16-bit SAR ADC requiring stable reference under varying battery voltage (3.6 V → 2.8 V). IC Role / Device Role / Timing Role: Shunt reference providing 1.225 V reference voltage to ADC VREF pin; regulates via series resistor from battery rail. Use Value: Maintains ±0.5% reference accuracy across battery discharge and temperature swing, enabling ±0.01% measurement repeatability. | Use Scenario: Industrial PLC analog input module digitizing 4–20 mA sensor signals with 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Precision reference for ADC and programmable gain amplifier calibration; referenced against internal DAC during self-test. Use Value: 100 ppm/°C tempco and 20 μVRMS noise ensure <±2 LSB error contribution over full operating range. |
| Process Control | Automotive Electronics |
Use Scenario: Loop-powered 4–20 mA transmitter with HART modulation, operating in hazardous area enclosures at 85°C ambient. IC Role / Device Role / Timing Role: Two-terminal shunt reference establishing local 1.225 V rail for signal conditioning ICs and microcontroller ADC. Use Value: Stable 60 μA–12 mA operation enables compliance with intrinsic safety current limits while maintaining reference integrity. | Use Scenario: Engine coolant temperature sensor signal conditioner in powertrain ECU, exposed to under-hood temperatures up to 125°C. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 shunt reference for thermistor bridge excitation and ADC reference in closed-loop fuel control. Use Value: Validated −40°C to +125°C performance eliminates derating; ±18.4 mV total error ensures <0.1°C temperature reading uncertainty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBVR | 2.5 V fixed output; higher 2 mA min operating current; 22 Ω dynamic impedance | Requires resistor divider for 1.225 V; unsuitable for ultra-low-power or tight-tolerance sub-1.25 V designs | Select only if 2.5 V reference suffices and board space allows divider network |
| MAX6008AEUR+T | 1.25 V output; ±0.2% initial tolerance; 30 ppm/°C tempco; SC70-3 package | Higher accuracy but limited to −40°C to +85°C; not AEC-Q100 qualified | Prefer for commercial-grade portable instruments where extended temp range is unnecessary |
Compared with TL431CDBVR and MAX6008AEUR+T, LM4041CEM3X-1.2/NOPB uniquely delivers 1.225 V output with Grade C accuracy, AEC-Q100 Grade 1 qualification, and 60 μA minimum current - making it the only drop-in solution for automotive and industrial shunt reference applications demanding sub-1.25 V precision at extreme temperatures.
Availability
LM4041CEM3X-1.2/NOPB is available at Aetrix Electronics and suitable for battery-powered equipment, process control transmitters, and automotive powertrain modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4041CEM3X-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 delivering analog, embedded processing, and connectivity solutions with deep expertise in precision analog design and automotive qualification.
The LM4041-N family was engineered for space-constrained, high-reliability applications requiring stable voltage references without external capacitors - targeting battery-operated instrumentation, automotive sensors, and industrial process control systems.
FAQ
What is the maximum operating current for LM4041CEM3X-1.2/NOPB?
The LM4041CEM3X-1.2/NOPB supports a maximum operating current of 12 mA, as specified in TI's SNOS641I datasheet Section 5.3. This limit ensures safe power dissipation within the SOT-23 package at elevated temperatures and maintains long-term stability. Exceeding 12 mA risks thermal overstress and accelerated parametric drift. For continuous operation near this limit, PCB copper pour and airflow should be verified per thermal metrics in Section 5.4.
Does LM4041CEM3X-1.2/NOPB require an output capacitor for stability?
No, LM4041CEM3X-1.2/NOPB does not require an output capacitor for stability. Its internal design eliminates the need for external stabilization, as confirmed in Section 3 (Description) and Section 4 (Pin Configuration) of the TI datasheet. It remains stable with capacitive loads up to 10 nF, enabling direct connection to ADC inputs or long PCB traces without risk of oscillation - a key advantage over legacy shunt references like TL431.
Is LM4041CEM3X-1.2/NOPB qualified for automotive applications?
Yes, LM4041CEM3X-1.2/NOPB is AEC-Q100 Grade 1 qualified for automotive use, supporting −40°C to +125°C ambient operation. This qualification is explicitly stated in Section 1 (Features) and Section 4 (Device Information) of the TI datasheet, and applies to the SOT-23 packaged LM4041-N-Q1 variants including LM4041CEM3X-1.2/NOPB. It is approved for engine control, ADAS, and body electronics applications requiring high reliability.
What is the reverse breakdown voltage tolerance of LM4041CEM3X-1.2/NOPB over temperature?
LM4041CEM3X-1.2/NOPB has a total reverse breakdown voltage tolerance of ±18.4 mV over −40°C to +125°C, corresponding to ±1.5% of 1.225 V. This value is derived from its Grade C initial tolerance (±0.5% at 25°C) plus worst-case temperature coefficient (100 ppm/°C) over 100°C ΔT, as calculated in Section 5.7 of the TI datasheet. It is validated for extended temperature range operation and documented in Table 5.7.
Can LM4041CEM3X-1.2/NOPB be used in adjustable-output configurations?
No, LM4041CEM3X-1.2/NOPB is a fixed 1.225 V output variant and does not support adjustable configurations. Only the LM4041-N ADJ (e.g., LM4041AIM3X-ADJ/NOPB) includes a dedicated FB pin for external resistor-divider programming. The LM4041CEM3X-1.2/NOPB uses a 3-pin SOT-23 package with Cathode-Anode-NC pinout and lacks feedback functionality - attempting adjustment would violate its electrical specifications and void AEC-Q100 qualification.
LM4041CEM3X-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:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 68 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041CEM3X-1.2/NOPB FAQ
1.How can I place an order for LM4041CEM3X-1.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CEM3X-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 LM4041CEM3X-1.2/NOPB reliable?
The price and inventory of LM4041CEM3X-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 LM4041CEM3X-1.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4041CEM3X-1.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CEM3X-1.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CEM3X-1.2/NOPB?
LM4041CEM3X-1.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CEM3X-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 LM4041CEM3X-1.2/NOPB?
For technical support, including LM4041CEM3X-1.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CEM3X-1.2/NOPB requirements.
6.How does Aetrix verify that LM4041CEM3X-1.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4041CEM3X-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 LM4041CEM3X-1.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4041CEM3X-1.2/NOPB?
All LM4041CEM3X-1.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CEM3X-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 LM4041CEM3X-1.2/NOPB part is unused and in its original packaging.
Return procedure for LM4041CEM3X-1.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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