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Texas Instruments LM4041QDEM3-ADJ/NO
- Part No.:
- LM4041QDEM3-ADJ/NO
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041QDEM3-ADJ/NO.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,900
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Product details
Overview
LM4041QDEM3-ADJ/NO from Texas Instruments is an automotive-grade, adjustable-output shunt voltage reference in SOT-23-3 package, delivering 1.24 V to 10 V output with ±0.5% initial tolerance (C grade), 100 ppm/°C max temperature coefficient, 60 μA minimum operating current, and 20 μVrms wideband noise (10 Hz–10 kHz). It enables precision biasing in battery-powered sensor signal chains.
For engineers reviewing the LM4041QDEM3-ADJ/NO datasheet, LM4041QDEM3-ADJ/NO pinout, LM4041QDEM3-ADJ/NO application, or LM4041QDEM3-ADJ/NO equivalent, key selection criteria include extended temperature range (−40°C to +125°C), no-output-capacitor stability, feedback-pin-based adjustability, and AEC-Q100 Grade 1 qualification for automotive systems.
Technical Context
The LM4041QDEM3-ADJ/NO uses a bandgap-derived Zener-zap trimmed reference core with curvature-corrected temperature drift compensation, ensuring stable reverse breakdown voltage across −40°C to +125°C. Its two-terminal shunt architecture operates without external capacitors and tolerates any capacitive load.
It features a dedicated FB (feedback) pin that sets output voltage via external resistor divider; cathode serves as both current sink and output node, while anode is grounded. The device draws only 60 μA minimum current and supports up to 12 mA shunt current, enabling ultra-low-power operation in always-on subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 1.24 V to 10 V - set by external resistor divider on FB pin; enables flexible system-level voltage scaling |
| Initial Tolerance (25°C) | ±0.5% - C-grade accuracy ensures minimal calibration overhead in production test |
| Temp Coefficient (max) | 100 ppm/°C - guarantees ≤±12 mV drift over −40°C to +125°C at 5 V output |
| Min Operating Current | 60 μA - supports operation from microamp-level bias sources (e.g., high-Z DAC outputs) |
| Noise (10 Hz–10 kHz) | 20 μVrms - low enough for 16-bit ADC reference buffering without added filtering |
| Long-Term Stability | 120 ppm (1000 hrs) - predictable aging behavior for mission-critical automotive modules |
| ESD Rating (HBM) | ±2000 V - meets IEC 61000-4-2 Level 2 for board-level robustness |
Pinout & Package
SOT-23-3 package (1.30 mm × 2.92 mm body), surface-mount, thermally optimized for PCB heat sinking. Pin 1 = FB (input), Pin 2 = Cathode (output/shunt node), Pin 3 = Anode (ground).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (Pin 1) | Feedback input | High-impedance (≤150 nA) node that senses divided output voltage; sets VOUT = VREF × (1 + R1/R2) |
| Cathode (Pin 2) | Shunt output / current sink | Primary output node; sinks all load + reference current; requires external series resistor for regulation |
| Anode (Pin 3) | Ground reference | Must be connected to system ground; defines 0 V reference for FB and output |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with any capacitive load (0–∞), eliminating BOM cost and layout sensitivity |
| AEC-Q100 Grade 1 qualified | Validated for −40°C to +125°C ambient operation in automotive ECUs and ADAS sensors |
| Adjustable output via resistor divider | Enables single BOM part to support multiple rail voltages (e.g., 2.5 V, 3.3 V, 5 V) without redesign |
| Low 20 μVrms noise | Preserves SNR in precision analog front-ends without requiring additional low-noise LDOs |
| 60 μA min operating current | Compatible with ultra-low-power microcontrollers and energy-harvesting power supplies |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
Use Scenario: Temperature and humidity sensing in HVAC control modules with CAN bus reporting. IC Role / Device Role / Timing Role: Shunt reference for 12-bit SAR ADC driving microcontroller analog inputs. Use Value: Grade 1 qualification ensures reliability over full vehicle lifetime; 100 ppm/°C TC avoids recalibration during thermal cycling. |
Use Scenario: Battery-powered ECG front-end with 16-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Precision 2.5 V reference for ADC and op-amp biasing. Use Value: 20 μVrms noise prevents degradation of 85 dB SNR; 60 μA current draw extends battery life beyond 72 hours. |
| Industrial Process Transmitters | Smart Energy Meters |
Use Scenario: 4–20 mA loop-powered pressure transmitter with HART modulation. IC Role / Device Role / Timing Role: Stable 5 V reference for DAC and sensor excitation circuitry. Use Value: Adjustable output allows exact 5.000 V setting despite resistor tolerance; long-term stability reduces field calibration frequency. |
Use Scenario: Polyphase electricity meter with metrology-grade ADC and real-time clock. IC Role / Device Role / Timing Role: Reference for anti-aliasing filters and ADC reference buffer. Use Value: No-output-capacitor operation simplifies conformal coating process; 120 ppm 1000-hr drift meets IEC 62053-21 Class 0.2 accuracy requirements. |
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 2.5 V output; 2% initial tolerance; 50 μA min current; not AEC-Q100 qualified | Lacks adjustability and automotive qualification; suitable only for non-safety-critical industrial use | Select when cost is primary constraint and 2.5 V fixed reference suffices |
| MAX6008AEUR+T | Fixed 1.25 V output; ±0.2% tolerance; 35 μA min current; SC70-3 package; no automotive grade | Higher accuracy but non-adjustable; smaller package limits thermal dissipation at >5 mA | Select for space-constrained portable devices needing tighter initial accuracy at 1.25 V |
Compared with TL431CDBVR and MAX6008AEUR+T, LM4041QDEM3-ADJ/NO uniquely combines AEC-Q100 Grade 1 qualification, 1.24–10 V adjustability, and guaranteed stability without output capacitance-making it the only choice for automotive and high-reliability industrial shunt references requiring design flexibility and long-term accuracy.
Availability
LM4041QDEM3-ADJ/NO is available at Aetrix Electronics and suitable for automotive cabin control units, portable medical monitors, industrial process transmitters, and smart energy meters requiring stable component supply under extended temperature and long-lifecycle conditions.
Supply support for LM4041QDEM3-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 leader specializing in analog and embedded processing technologies, with decades of experience in precision reference design and automotive qualification.
The LM4041-N-Q1 product line delivers micropower, high-accuracy shunt references engineered specifically for automotive and industrial applications demanding extended temperature operation, low noise, and long-term stability.
FAQ
What is the maximum output voltage supported by LM4041QDEM3-ADJ/NO?
The LM4041QDEM3-ADJ/NO supports an output voltage range of 1.24 V to 10 V, set by the external resistor divider connected to the FB pin. This upper limit is specified in the Absolute Maximum Ratings table and applies across the full −40°C to +125°C operating range. Exceeding 10 V risks violating the 15 V maximum output voltage rating and may cause irreversible damage.
Does LM4041QDEM3-ADJ/NO require an output capacitor for stability?
No, LM4041QDEM3-ADJ/NO does not require an output capacitor for stability. Its internal design eliminates the need for external stabilization capacitance while maintaining stability with any capacitive load-from 0 pF to unlimited values. This feature simplifies layout, reduces BOM count, and improves reliability in harsh environments where capacitor aging or failure is a concern.
What is the minimum cathode current needed for LM4041QDEM3-ADJ/NO to regulate properly?
The LM4041QDEM3-ADJ/NO requires a minimum cathode current of 60 μA to maintain regulation across the full −40°C to +125°C temperature range. At 25°C, this value is 45 μA. Below this threshold, the device exits regulation and output voltage collapses. Designers must ensure the sum of load current and reference current remains ≥60 μA under worst-case conditions.
How is the LM4041QDEM3-ADJ/NO qualified for automotive use?
LM4041QDEM3-ADJ/NO is AEC-Q100 qualified as Grade 1, meaning it has been tested and certified for operation from −40°C to +125°C ambient temperature. It meets stress tests including HTOL, temperature cycling, and ESD (±2000 V HBM), and is manufactured in TI's ISO/TS 16949-certified facilities. The "Q" in the part number explicitly denotes automotive qualification.
Can LM4041QDEM3-ADJ/NO replace a fixed-voltage reference like LM4041CIM3-ADJ?
Yes, LM4041QDEM3-ADJ/NO can replace LM4041CIM3-ADJ in adjustable-reference circuits, provided the application requires AEC-Q100 Grade 1 qualification and operates up to +125°C. Both share identical pinout, electrical characteristics, and adjustability-but LM4041QDEM3-ADJ/NO adds automotive qualification, while LM4041CIM3-ADJ is rated only for industrial temperature (−40°C to +85°C).
LM4041QDEM3-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:
- ±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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041QDEM3-ADJ/NO FAQ
1.How can I place an order for LM4041QDEM3-ADJ/NO through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041QDEM3-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 LM4041QDEM3-ADJ/NO reliable?
The price and inventory of LM4041QDEM3-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 LM4041QDEM3-ADJ/NO is usually 5 days.
3.What payment methods are accepted for LM4041QDEM3-ADJ/NO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041QDEM3-ADJ/NO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041QDEM3-ADJ/NO?
LM4041QDEM3-ADJ/NO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041QDEM3-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 LM4041QDEM3-ADJ/NO?
For technical support, including LM4041QDEM3-ADJ/NO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041QDEM3-ADJ/NO requirements.
6.How does Aetrix verify that LM4041QDEM3-ADJ/NO is sourced from the original manufacturer or authorized distributors?
All LM4041QDEM3-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 LM4041QDEM3-ADJ/NO meets industry standards.
7.What is the process for return or replacement of LM4041QDEM3-ADJ/NO?
All LM4041QDEM3-ADJ/NO units undergo pre-shipment inspection (PSI). If there is an issue with LM4041QDEM3-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 LM4041QDEM3-ADJ/NO part is unused and in its original packaging.
Return procedure for LM4041QDEM3-ADJ/NO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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