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Texas Instruments LM4041DEM3-ADJ
- Part No.:
- LM4041DEM3-ADJ
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DEM3-ADJ.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,865
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Product details
Overview
LM4041DEM3-ADJ from Texas Instruments is a precision adjustable shunt voltage reference in SOT-23 package, delivering 1.233 V nominal reference voltage with ±0.5% initial tolerance (C grade) at 25°C, 100 ppm/°C max temperature coefficient, and 20 μVRMS wideband noise (10 Hz–10 kHz). It operates from 60 μA to 12 mA over −40°C to +125°C and requires no output capacitor-used in high-accuracy ADC biasing and battery-monitoring circuits.
For engineers reviewing the LM4041DEM3-ADJ datasheet, LM4041DEM3-ADJ pinout, LM4041DEM3-ADJ application, or LM4041DEM3-ADJ equivalent, key selection criteria include adjustable output (1.24 V to 10 V), low dynamic impedance (0.3 Ω typical), feedback current ≤100 nA, thermal hysteresis of 0.08%, and AEC-Q100 Grade 1 qualification for automotive under-hood use.
Technical Context
The LM4041DEM3-ADJ uses a bandgap-based shunt architecture with curvature-corrected temperature drift compensation and Zener-zap wafer-level trimming to achieve ±0.5% initial accuracy. Its feedback (FB) pin enables external resistor-divider programming of output voltage between 1.24 V and 10 V while maintaining stable regulation across load and temperature.
It features low dynamic output impedance (0.3 Ω at 1 mA), tolerates capacitive loads without oscillation, and maintains stability with no external capacitor-enabling compact designs in space-constrained applications such as portable instrumentation and automotive sensor signal conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.233 V nominal at 100 μA, enabling precise programmable outputs from 1.24 V to 10 V via external resistors |
| Initial Tolerance | ±0.5% at 25°C (C grade), corresponding to ±6.2 mV error at 5 V output-suitable for 12-bit+ data acquisition systems |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +125°C, limiting drift to ±12.5 mV over full range at 5 V output |
| Noise (10 Hz–10 kHz) | 20 μVRMS, supporting low-noise precision measurement front-ends without additional filtering |
| Operating Current | 60 μA minimum to 12 mA maximum-enables ultra-low-power operation in battery-backed systems |
| Dynamic Impedance | 0.3 Ω typical at 1 mA, ensuring minimal load regulation error (<1 mV change per 1 mA load shift) |
| Feedback Current | ≤100 nA at 25°C, reducing divider resistor power loss and self-heating errors in high-impedance networks |
Pinout & Package
LM4041DEM3-ADJ is supplied in a 3-pin SOT-23 (DBZ) package with 1.30 mm × 2.92 mm body size. Pin 1 is FB (feedback input), Pin 2 is Cathode (shunt current path and output node), Pin 3 is Anode (ground reference).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (FB) | Feedback input | High-impedance node (≤100 nA) that sets output voltage via external resistor divider; must be connected to output for adjustable configuration |
| Pin 2 (Cathode) | Shunt current sink / output node | Primary current path and regulated voltage output point; connects to load and feedback network |
| Pin 3 (Anode) | Ground reference | Low-impedance return path; must be tied to system ground with minimal trace inductance for stability |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output range | 1.24 V to 10 V via two-resistor divider-eliminates need for multiple fixed-voltage references |
| No external capacitor required | Internally compensated design ensures stability with any capacitive load, simplifying layout and reducing BOM count |
| AEC-Q100 Grade 1 qualified | Validated for −40°C to +125°C ambient operation-meets automotive under-hood reliability requirements |
| Low quiescent current | 60 μA minimum operating current enables >10-year battery life in always-on monitoring systems |
| Thermal hysteresis | 0.08% max-minimizes repeatability error after thermal cycling in industrial control environments |
Applications
| Battery Monitoring | Data Acquisition Systems |
|---|---|
Use Scenario: Real-time Li-ion cell voltage tracking in portable medical devices with 16-bit SAR ADCs. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V bias for ADC reference input and analog front-end gain-setting. Use Value: ±0.5% initial tolerance and 100 ppm/°C drift ensure <0.02% full-scale error over temperature-meeting IEC 60601 accuracy requirements. | Use Scenario: Multi-channel sensor signal conditioning in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Programmable reference source for configurable 4–20 mA transmitter calibration and ADC reference scaling. Use Value: Adjustable 1.24–10 V output supports unified hardware design across 0–5 V, 0–10 V, and ±5 V input ranges-reducing variant SKUs by 60%. |
| Automotive Sensor Interfaces | Precision Instrumentation |
Use Scenario: Exhaust gas temperature (EGT) sensor signal conditioning in diesel engine control units. IC Role / Device Role / Timing Role: Stable reference for ratiometric bridge excitation and cold-junction compensation in thermocouple interfaces. Use Value: AEC-Q100 Grade 1 qualification and 0.08% thermal hysteresis ensure repeatable measurements after repeated thermal soak cycles-critical for OBD-II compliance. | Use Scenario: Portable handheld multimeter reference subsystem requiring sub-10 ppm/°C stability. IC Role / Device Role / Timing Role: Primary voltage reference for auto-ranging DCV measurement circuitry with 7½-digit resolution. Use Value: 20 μVRMS noise and low dynamic impedance enable direct connection to high-resolution delta-sigma ADCs-avoiding noise-amplifying op-amp buffers. |
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-ADJ | Same SOT-23 package and adjustable architecture, but rated for −40°C to +85°C industrial range only; ±0.5% tolerance identical | Not qualified for automotive extended temperature use; suitable for consumer or industrial indoor applications | Select when cost sensitivity outweighs AEC-Q100 requirement and ambient temperature stays below 85°C |
| TLVH431ACDBVR | Adjustable shunt reference with 1.24 V min output, ±0.5% tolerance, but higher 50 ppm/°C tempco and 35 μVRMS noise | Lacks AEC-Q100 qualification; lower noise and tempco performance limit use in high-precision automotive or metrology roles | Choose for non-automotive cost-sensitive designs where 35 μVRMS noise is acceptable and thermal drift budget allows 50 ppm/°C |
Compared with LM4041CIM3-ADJ and TLVH431ACDBVR, the LM4041DEM3-ADJ uniquely combines AEC-Q100 Grade 1 qualification, 100 ppm/°C max tempco, and 20 μVRMS noise-making it the only option among the three validated for under-hood automotive precision sensing with long-term stability.
Availability
LM4041DEM3-ADJ is available at Aetrix Electronics and suitable for battery-powered equipment, automotive electronics, and precision instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041DEM3-ADJ 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-grade component validation.
The LM4041-N series was engineered for high-accuracy, low-power shunt reference applications in harsh environments-including automotive, industrial, and portable instrumentation-where stability, small size, and qualification rigor are critical.
FAQ
What is the output voltage range supported by the LM4041DEM3-ADJ?
The LM4041DEM3-ADJ supports an adjustable output voltage range from 1.24 V to 10 V, set by an external resistor divider connected to its FB pin. This is achieved using the internal 1.233 V reference and high-impedance feedback input (≤100 nA), enabling precise scaling without loading the divider network. The LM4041DEM3-ADJ maintains regulation across this full range within its specified operating current (60 μA–12 mA) and temperature (−40°C to +125°C).
Is the LM4041DEM3-ADJ qualified for automotive applications?
Yes, the LM4041DEM3-ADJ is AEC-Q100 Grade 1 qualified, meaning it is tested and certified for operation over −40°C to +125°C ambient temperature and meets rigorous automotive reliability standards including HTOL, ESD, and thermal cycling. This qualification applies specifically to the LM4041DEM3-ADJ variant in SOT-23 packaging and is documented in TI's official LM4041-N-Q1 datasheet revision July 2025.
Does the LM4041DEM3-ADJ require an external output capacitor?
No, the LM4041DEM3-ADJ does not require an external output capacitor. Its internal compensation ensures stability with any capacitive load, including direct connection to ADC reference inputs or op-amp buffers. This eliminates capacitor-related aging, leakage, and board-space penalties-confirmed in TI's datasheet Section 3 ("Description") and Section 8.2 ("Typical Applications"). The LM4041DEM3-ADJ achieves this via advanced bandgap design and Zener-zap trimming.
What is the maximum operating current for the LM4041DEM3-ADJ?
The LM4041DEM3-ADJ has a maximum operating current of 12 mA, as specified in Section 5.3 ("Recommended Operating Conditions") of the TI datasheet. Exceeding this current risks exceeding absolute maximum power dissipation limits (306 mW for SOT-23 at 25°C ambient), potentially causing thermal shutdown or long-term reliability degradation. Derating is required above 25°C per the device's θJA = 291.9°C/W specification.
How does the LM4041DEM3-ADJ compare to fixed-output variants like LM4041DEM3-1.2?
The LM4041DEM3-ADJ differs from fixed-output variants (e.g., LM4041DEM3-1.2) by replacing the internal 1.225 V Zener with a high-impedance FB pin, enabling user-defined output voltages from 1.24 V to 10 V. Both share identical tolerance (±0.5%), tempco (≤100 ppm/°C), noise (20 μVRMS), and AEC-Q100 Grade 1 qualification-but only the ADJ version supports programmability. Pinout differs: FB replaces the fixed cathode connection in non-ADJ versions.
LM4041DEM3-ADJ 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:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.233V
- Voltage - Output (Max):
- 10 V
- Current - Output:
- 12 mA
- Tolerance:
- ±1%
- 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
LM4041DEM3-ADJ FAQ
1.How can I place an order for LM4041DEM3-ADJ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DEM3-ADJ 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 LM4041DEM3-ADJ reliable?
The price and inventory of LM4041DEM3-ADJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DEM3-ADJ is usually 5 days.
3.What payment methods are accepted for LM4041DEM3-ADJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DEM3-ADJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041DEM3-ADJ?
LM4041DEM3-ADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DEM3-ADJ 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 LM4041DEM3-ADJ?
For technical support, including LM4041DEM3-ADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DEM3-ADJ requirements.
6.How does Aetrix verify that LM4041DEM3-ADJ is sourced from the original manufacturer or authorized distributors?
All LM4041DEM3-ADJ 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 LM4041DEM3-ADJ meets industry standards.
7.What is the process for return or replacement of LM4041DEM3-ADJ?
All LM4041DEM3-ADJ units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DEM3-ADJ, 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 LM4041DEM3-ADJ part is unused and in its original packaging.
Return procedure for LM4041DEM3-ADJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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