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Texas Instruments LM4041QCEM3-ADJ/NO
- Part No.:
- LM4041QCEM3-ADJ/NO
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041QCEM3-ADJ/NO.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,063
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Product details
Overview
LM4041QCEM3-ADJ/NO from Texas Instruments is an automotive-grade adjustable shunt voltage reference in SOT-23-3 package, delivering 1.24 V nominal reference voltage with ±0.5% initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and stable operation from 60 μA to 12 mA load current - used for precision biasing in automotive sensor signal conditioning circuits.
For engineers reviewing the LM4041QCEM3-ADJ/NO datasheet, LM4041QCEM3-ADJ/NO pinout, LM4041QCEM3-ADJ/NO application, or LM4041QCEM3-ADJ/NO equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), no-output-capacitor requirement, feedback-pin-based adjustability, and low 20 μVrms noise across 10 Hz–10 kHz.
Technical Context
The LM4041QCEM3-ADJ/NO implements a bandgap-based shunt reference architecture with curvature-corrected temperature drift compensation and Zener-zap trim at wafer sort, enabling ±0.5% initial accuracy without external capacitors. Its three-terminal configuration (Anode, Cathode, FB) supports programmable output voltages from 1.24 V to 10 V via external resistor divider on the FB pin.
It operates across –40°C to +125°C ambient, maintains <2.5 mV output change over 60 μA–1 mA current range, and exhibits 0.3 Ω typical dynamic output impedance at 120 Hz - ensuring stable regulation under varying load and temperature conditions in safety-critical automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.24 V nominal at 25°C; sets minimum programmable output when used with external resistive divider |
| Initial Tolerance | ±0.5% at 25°C (C-grade); ensures tight system-level calibration without post-manufacture trimming |
| Temp Coefficient | 100 ppm/°C max; limits output drift to ±12.5 mV over full –40°C to +125°C operating range |
| Operating Current | 60 μA min / 12 mA max; enables ultra-low-power sensor biasing and high-current DAC reference use |
| Noise (10 Hz–10 kHz) | 20 μVrms; preserves signal integrity in 16-bit+ data acquisition front-ends |
| Dynamic Impedance | 0.3 Ω typical at 120 Hz; minimizes output perturbation during transient load steps |
| Long-Term Stability | 120 ppm over 1000 hrs; reduces calibration drift in automotive ECU lifetime requirements |
Pinout & Package
SOT-23-3 package (1.30 mm × 2.92 mm body), surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 3) | Ground reference terminal | Internally connected to substrate; must be tied to system ground for proper shunt operation |
| Cathode (Pin 2) | Output and current sink node | Delivers regulated voltage; sinks all load + reference current; connects to feedback divider top |
| FB (Pin 1) | Adjustment input | High-impedance (150 nA max) feedback node; sets output voltage via resistor divider to Anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient temperatures from –40°C to +125°C per TI's Q100 test results |
| No output capacitor required | Stable with any capacitive load up to 10 μF; eliminates BOM cost and board space for stabilization cap |
| Adjustable output (1.24 V–10 V) | Configured via two-resistor divider on FB pin; supports flexible system-level voltage scaling |
| Tolerates capacitive loads | Remains stable driving ADC input caps, op-amp inputs, or long PCB traces without ringing |
| Low quiescent current | 60 μA minimum operating current enables use in always-on automotive modules with microamp budget |
Applications
| Automotive Cabin Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Biasing MEMS pressure and humidity sensors in HVAC control modules. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V excitation voltage for ratiometric sensor bridges. Use Value: ±0.5% initial tolerance and 100 ppm/°C TC ensure <0.1% total error contribution across cabin temperature range. | Use Scenario: Reference source for 16-bit SAR ADCs in battery-powered environmental monitoring nodes. IC Role / Device Role / Timing Role: Precision voltage reference establishing ADC full-scale range under variable supply and temperature. Use Value: 20 μVrms noise and 0.3 Ω dynamic impedance preserve ENOB >15.5 bits across 60 μA–5 mA operating range. |
| Energy Metering Front-Ends | Medical Diagnostic Signal Chains |
Use Scenario: Calibration reference for polyphase energy meter ICs measuring grid voltage/current harmonics. IC Role / Device Role / Timing Role: Stable 1.24 V reference for metrology ADCs and anti-aliasing filter biasing. Use Value: 120 ppm long-term stability meets IEC 62053-21 Class 0.2 accuracy retention over 10-year field life. | Use Scenario: Reference for portable ECG amplifier stages requiring DC-coupled, low-noise gain blocks. IC Role / Device Role / Timing Role: Low-drift shunt reference setting common-mode voltage and gain-setting resistors. Use Value: Thermal hysteresis of only 0.08% prevents baseline shift after thermal cycling during device sterilization cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C12QDBZRQ1 | Fixed 1.2 V output; same SOT-23-3 package; ±0.5% tolerance; 75 ppm/°C TC | Not adjustable; requires redesign of feedback network if variable output needed | Select when fixed 1.2 V suffices and lower TC is prioritized |
| MAX6008AEUR+T | Fixed 1.25 V output; SC70-3 package; ±0.2% tolerance; 50 ppm/°C TC; higher 100 μA min current | Smaller footprint but incompatible pinout; not AEC-Q100 qualified | Select for non-automotive industrial use where tighter initial accuracy justifies SC70 layout change |
Compared with TL4050C12QDBZRQ1 and MAX6008AEUR+T, LM4041QCEM3-ADJ/NO uniquely combines automotive qualification, adjustable output, and ultra-low minimum current - making it the only choice for AEC-Q100-compliant systems requiring programmable reference voltage without layout revision.
Availability
LM4041QCEM3-ADJ/NO is available at Aetrix Electronics and suitable for automotive sensor modules, industrial data loggers, and energy metering front-ends requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4041QCEM3-ADJ/NO 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 electronics.
The LM4041-N-Q1 product line delivers AEC-Q100-qualified shunt references optimized for automotive signal conditioning, sensor biasing, and power-supply monitoring - designed to meet stringent reliability, temperature, and long-term stability requirements in vehicle ECUs.
FAQ
What is the maximum output voltage supported by LM4041QCEM3-ADJ/NO?
The LM4041QCEM3-ADJ/NO supports an adjustable output voltage range from 1.24 V to 10 V, set by an external resistor divider connected between Cathode (Pin 2), FB (Pin 1), and Anode (Pin 3). This range is validated across the full –40°C to +125°C operating temperature and 60 μA to 12 mA cathode current range per the LM4041-N-Q1 datasheet Section 6.9.
Is LM4041QCEM3-ADJ/NO pin-compatible with standard LM4041 variants?
Yes, LM4041QCEM3-ADJ/NO uses the standard SOT-23-3 package with identical pinout (Anode = Pin 3, Cathode = Pin 2, FB = Pin 1) as all LM4041-N-Q1 ADJ variants. It is mechanically and electrically compatible with existing LM4041 footprints, requiring no PCB layout changes when upgrading from non-automotive or lower-grade versions.
Does LM4041QCEM3-ADJ/NO require an external capacitor for stability?
No, LM4041QCEM3-ADJ/NO does not require an external output capacitor. Its internal design ensures stability with any capacitive load up to at least 10 μF, as confirmed in the LM4041-N-Q1 datasheet Section 1 ("Features") and Section 9.1 ("Application Information"). This eliminates BOM cost and layout area typically needed for shunt reference stabilization.
What is the feedback pin (FB) input current specification for LM4041QCEM3-ADJ/NO?
The FB pin input current for LM4041QCEM3-ADJ/NO is specified as 150 nA maximum at 25°C and 120 nA maximum over –40°C to +125°C (Section 6.8, "LM4041-N-xx ADJ Electrical Characteristics"). This ultra-low leakage enables use of high-value resistor dividers (e.g., 1 MΩ/1 MΩ) without introducing significant voltage error.
How is the AEC-Q100 qualification level defined for LM4041QCEM3-ADJ/NO?
LM4041QCEM3-ADJ/NO is AEC-Q100 Grade 1 qualified, meaning it has passed stress testing for operation from –40°C to +125°C ambient temperature, including HTOL, TC, UHAST, and ESD per JESD22 standards. This is documented in the LM4041-N-Q1 datasheet Section 1 ("Features") and TI's official Q100 report summary for the LM4041-Q1 family.
LM4041QCEM3-ADJ/NO 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:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.233V
- Voltage - Output (Max):
- 10 V
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041QCEM3-ADJ/NO FAQ
1.How can I place an order for LM4041QCEM3-ADJ/NO through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041QCEM3-ADJ/NO 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 LM4041QCEM3-ADJ/NO reliable?
The price and inventory of LM4041QCEM3-ADJ/NO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041QCEM3-ADJ/NO is usually 5 days.
3.What payment methods are accepted for LM4041QCEM3-ADJ/NO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041QCEM3-ADJ/NO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041QCEM3-ADJ/NO?
LM4041QCEM3-ADJ/NO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041QCEM3-ADJ/NO 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 LM4041QCEM3-ADJ/NO?
For technical support, including LM4041QCEM3-ADJ/NO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041QCEM3-ADJ/NO requirements.
6.How does Aetrix verify that LM4041QCEM3-ADJ/NO is sourced from the original manufacturer or authorized distributors?
All LM4041QCEM3-ADJ/NO 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 LM4041QCEM3-ADJ/NO meets industry standards.
7.What is the process for return or replacement of LM4041QCEM3-ADJ/NO?
All LM4041QCEM3-ADJ/NO units undergo pre-shipment inspection (PSI). If there is an issue with LM4041QCEM3-ADJ/NO, 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 LM4041QCEM3-ADJ/NO part is unused and in its original packaging.
Return procedure for LM4041QCEM3-ADJ/NO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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