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Texas Instruments LM4041DEM3-ADJ/NOPB
- Part No.:
- LM4041DEM3-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DEM3-ADJ/NOPB.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,683
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Product details
Overview
LM4041DEM3-ADJ/NOPB from Texas Instruments is a precision adjustable shunt voltage reference in SOT-23-3 package, delivering 1.233 V nominal reference voltage with ±0.5% initial tolerance 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 serves as a stable voltage setpoint in high-accuracy analog signal chains.
For engineers reviewing the LM4041DEM3-ADJ/NOPB datasheet, LM4041DEM3-ADJ/NOPB pinout, LM4041DEM3-ADJ/NOPB application, or LM4041DEM3-ADJ/NOPB equivalent, key selection criteria include its extended-temperature-grade AEC-Q100 qualification, no-output-capacitor requirement, feedback-pin-based adjustability, and compatibility with capacitive loads in space-constrained systems.
Technical Context
The LM4041DEM3-ADJ/NOPB uses a bandgap-derived Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its feedback (FB) pin enables programmable output voltage from 1.24 V to 10 V via external resistor divider, while maintaining low dynamic impedance (0.3 Ω typical at 1 mA) and stable regulation across load and temperature.
It supports two operating modes: shunt regulation (cathode current sourced externally) and feedback-controlled reference generation. The device eliminates need for output stabilization capacitors and tolerates arbitrary capacitive loading - critical for ADC reference buffers and isolated power supply feedback loops where layout parasitics dominate stability margins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.233 V at 100 μA, VOUT = 5 V - precise setpoint for resistor-divider-adjusted outputs |
| Initial Tolerance | ±0.5% at 25°C (C grade) - enables <10 mV absolute error in 5 V systems without calibration |
| Temp Coefficient | ±100 ppm/°C max (−40°C to +125°C) - ensures ≤ ±12.5 mV drift over full range in 5 V designs |
| Operating Current | 60 μA min to 12 mA max - supports ultra-low-power sensor nodes and high-current DAC references |
| Noise (10 Hz–10 kHz) | 20 μVRMS - suitable for 16-bit+ SAR ADCs and precision instrumentation amplifiers |
| Dynamic Impedance | 0.3 Ω typical at 1 mA - minimizes load-induced voltage shift in varying-current applications |
| Long-Term Stability | 120 ppm (1000 hrs) - ensures <0.15% output drift over 1 year in sealed industrial modules |
Pinout & Package
SOT-23-3 package (1.30 mm × 2.92 mm), surface-mount, lead-free (NOPB), rated for −40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 3) | Ground reference node | Must be connected to system ground; provides return path for shunt current |
| Cathode (Pin 2) | Shunt output terminal | Sinks regulated current; voltage at this node equals programmed VOUT relative to anode |
| FB (Pin 1) | Feedback input | High-impedance (≤100 nA) node that sets VOUT = VREF × (1 + R1/R2); enables adjustable output without internal resistors |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output via FB pin | Enables 1.24 V–10 V programmability with external resistors - eliminates need for multiple fixed-voltage references |
| No output capacitor required | Stable under all capacitive loads - simplifies PCB layout and reduces BOM count in compact designs |
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient range (−40°C to +125°C) - supports engine control, ADAS, and infotainment systems |
| Low quiescent current | 60 μA minimum operating current - extends battery life in portable data loggers and wireless sensors |
| Low thermal hysteresis | 0.08% - ensures repeatable voltage after thermal cycling, critical for metrology and calibration equipment |
Applications
| Battery-Powered Precision Sensors | Data-Acquisition Front-Ends |
|---|---|
Use Scenario: Low-power environmental sensor node measuring temperature/humidity with 16-bit ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V or 4.096 V reference to ADC and microcontroller's internal VREF. Use Value: Enables <±1 LSB error over −40°C to +85°C using only 60 μA supply current and no external capacitor. | Use Scenario: Industrial PLC analog input module digitizing 4–20 mA and ±10 V signals. IC Role / Device Role / Timing Role: Programmable reference source for multiplexed SAR ADCs and isolation amplifier feedback paths. Use Value: Adjustable output (1.24–10 V) matches diverse sensor full-scale ranges; 100 ppm/°C TC avoids recalibration during cabinet temperature swings. |
| Automotive Body Control Modules | Precision Energy Metering |
Use Scenario: In-vehicle battery monitoring unit measuring cell voltages and pack current. IC Role / Device Role / Timing Role: High-stability shunt reference for delta-sigma ADCs in ASIL-B compliant BMS subsystems. Use Value: AEC-Q100 Grade 1 rating and 125°C operation ensure reliability under hood; ±0.5% tolerance reduces factory calibration time. | Use Scenario: Revenue-grade electricity meter requiring Class 0.2 accuracy per IEC 62053-21. IC Role / Device Role / Timing Role: Primary reference for metrology-grade ADCs measuring voltage and current waveforms. Use Value: 20 μVRMS noise and 120 ppm long-term stability meet stringent AC accuracy and aging requirements over 10-year field life. |
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 | Fixed 2.495 V output; higher 1 mA min cathode current; 22 Ω typical dynamic impedance | Lacks adjustability; unsuitable for sub-2.4 V or >5 V reference needs | Select when fixed 2.5 V reference suffices and cost sensitivity outweighs precision and flexibility |
| MAX6126AASA+ | Series topology; 3.3 V fixed output; 3 ppm/°C tempco; requires input voltage ≥ VOUT + 0.3 V | Cannot operate as shunt; incompatible with floating or high-side sensing topologies | Choose for ultra-low-drift (<10 ppm total) in low-noise, low-power series-regulated supplies |
Compared with TL431CDBVR and MAX6126AASA+, the LM4041DEM3-ADJ/NOPB uniquely combines adjustable output, shunt topology, ultra-low minimum current (60 μA), and AEC-Q100 Grade 1 qualification - making it optimal for automotive and battery-powered precision systems where flexibility, size, and temperature robustness are critical.
Availability
LM4041DEM3-ADJ/NOPB is available at Aetrix Electronics and suitable for battery-powered sensors, automotive body control modules, and precision energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041DEM3-ADJ/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 reference design and automotive-grade component validation.
The LM4041-N family was engineered for space-constrained, high-accuracy analog systems needing stable voltage references without external capacitors - targeting automotive, industrial, and portable instrumentation markets.
FAQ
What is the maximum output voltage supported by the LM4041DEM3-ADJ/NOPB?
The LM4041DEM3-ADJ/NOPB supports an output voltage range of 1.24 V to 10 V, set by an external resistor divider connected to the FB pin. This upper limit is specified in the Absolute Maximum Ratings table and validated across the full −40°C to +125°C operating range. Exceeding 10 V risks permanent damage to the device.
Does the LM4041DEM3-ADJ/NOPB require an external output capacitor for stability?
No, the LM4041DEM3-ADJ/NOPB does not require an external output capacitor. Its internal design ensures unconditional stability with any capacitive load, including large ceramic or bulk electrolytic capacitors. This eliminates layout constraints and reduces bill-of-materials cost in compact PCB designs.
What is the feedback pin (FB) input current specification for the LM4041DEM3-ADJ/NOPB?
The FB pin input current for the LM4041DEM3-ADJ/NOPB is 60 nA to 100 nA at 25°C (C grade), rising to ≤120 nA over −40°C to +125°C. This ultra-low bias current minimizes resistor-divider error and enables use of high-value resistors (e.g., 1 MΩ) to reduce power consumption in battery-operated systems.
How does the LM4041DEM3-ADJ/NOPB achieve its ±0.5% initial voltage tolerance?
The LM4041DEM3-ADJ/NOPB achieves ±0.5% initial tolerance at 25°C through wafer-level Zener-zap trimming of the reference core during manufacturing test. This laser-trimmed adjustment is performed before packaging and ensures the 1.233 V reference voltage meets C-grade specification without post-assembly calibration.
Is the LM4041DEM3-ADJ/NOPB qualified for automotive applications?
Yes, the LM4041DEM3-ADJ/NOPB is AEC-Q100 Grade 1 qualified, certified for operation from −40°C to +125°C ambient temperature. It meets automotive reliability standards including HTOL, ESD, and thermal cycling - making it suitable for engine bay, chassis, and ADAS subsystems where extended temperature performance is mandatory.
LM4041DEM3-ADJ/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:
- 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/NOPB FAQ
1.How can I place an order for LM4041DEM3-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DEM3-ADJ/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 LM4041DEM3-ADJ/NOPB reliable?
The price and inventory of LM4041DEM3-ADJ/NOPB 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/NOPB is usually 5 days.
3.What payment methods are accepted for LM4041DEM3-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DEM3-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041DEM3-ADJ/NOPB?
LM4041DEM3-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DEM3-ADJ/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 LM4041DEM3-ADJ/NOPB?
For technical support, including LM4041DEM3-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DEM3-ADJ/NOPB requirements.
6.How does Aetrix verify that LM4041DEM3-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4041DEM3-ADJ/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 LM4041DEM3-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM4041DEM3-ADJ/NOPB?
All LM4041DEM3-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DEM3-ADJ/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 LM4041DEM3-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM4041DEM3-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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