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Texas Instruments LM4041QDIM3-ADJ/NO
- Part No.:
- LM4041QDIM3-ADJ/NO
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041QDIM3-ADJ/NO.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:875
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Product details
Overview
LM4041QDIM3-ADJ/NO from Texas Instruments is an automotive-grade adjustable shunt voltage reference in SOT-23-3 package, delivering 1.233 V nominal reference voltage with ±12 mV (±1.0%) initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, 60–1200 μA operating current range, and stable operation with capacitive loads - used for precision ADC biasing and sensor excitation in automotive engine control units.
For engineers reviewing the LM4041QDIM3-ADJ/NO datasheet, LM4041QDIM3-ADJ/NO pinout, LM4041QDIM3-ADJ/NO application, or LM4041QDIM3-ADJ/NO equivalent, this page provides verified specifications, validated pin functions, confirmed automotive qualification (AEC-Q100 Grade 1), and real-world design context for voltage reference selection in safety-critical embedded systems.
Technical Context
The LM4041QDIM3-ADJ/NO employs a bandgap-based shunt architecture with curvature-corrected temperature drift compensation, enabling stable reverse breakdown voltage across −40°C to +125°C ambient. Its feedback (FB) pin enables external resistor-divider programming of output voltage from 1.24 V to 10 V, while internal Zener-zap trimming ensures ±1.0% initial accuracy at 25°C for the D-grade variant.
No external capacitor is required for stability, and it tolerates any capacitive load without oscillation - a result of low dynamic impedance (≤2 Ω at 1 mA) and optimized internal compensation. The device operates as a two-terminal shunt regulator when FB is tied to cathode (fixed mode), or as a three-terminal adjustable reference when FB is externally biased.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.233 V nominal at 100 μA, ±12 mV (±1.0%) initial tolerance - sets precise DC bias point for analog signal chains |
| Temp Coefficient | 100 ppm/°C max over −40°C to +125°C - ensures ≤±12.5 mV drift across full automotive temperature range |
| Operating Current | 60–1200 μA - supports ultra-low-power sensor nodes and high-current DAC references without external buffering |
| Output Noise | 20 μVrms (10 Hz–10 kHz) - minimizes quantization error in 16-bit+ data acquisition systems |
| Dynamic Impedance | ≤2 Ω at 1 mA - maintains regulation stability under fast load transients in closed-loop feedback circuits |
| Long-Term Stability | 120 ppm (1000 hrs @ 25°C) - guarantees <0.012% output drift over product lifetime in automotive modules |
| Thermal Hysteresis | 0.08% - limits repeatability error after thermal cycling between −40°C and +125°C |
Pinout & Package
SOT-23-3 package (1.30 mm × 2.92 mm body), RoHS-compliant, surface-mountable with standard reflow profile. Pin 1 = Cathode (shunt current path/output node), Pin 2 = Anode (ground reference), Pin 3 = Feedback (adjustable voltage sense input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink and output voltage node | Connects to regulated voltage rail; sinks all excess current to maintain VOUT = VREF × (1 + R1/R2) |
| Anode (Pin 2) | Ground reference terminal | Must be connected to system ground; defines 0 V reference for cathode and FB terminals |
| FB (Pin 3) | Adjustable reference feedback input | Accepts voltage divider output; regulates cathode voltage to 1.233 V above anode - enables programmable VOUT |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for −40°C to +125°C ambient operation in automotive powertrain and chassis ECUs |
| No output capacitor required | Eliminates BOM cost and board space for stabilization - simplifies layout in space-constrained modules |
| Tolerates unlimited capacitive load | Enables direct connection to ADC input caps, op-amp integrators, or long PCB traces without phase margin loss |
| Low 20 μVrms noise | Preserves ENOB in precision SAR and delta-sigma converters without additional filtering |
| 60 μA minimum operating current | Supports battery-powered telematics and tire pressure sensors with multi-year standby life |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Pressure Sensor Transmitter |
|---|---|
Use Scenario: Regulating excitation voltage for piezoresistive pressure sensors in diesel common-rail fuel systems. IC Role / Device Role / Timing Role: Shunt reference providing stable 5.0 V (via 1.233 V FB + resistor divider) to sensor bridge, rejecting supply ripple and thermal drift. Use Value: Enables ±0.1% full-scale accuracy over −40°C to +125°C, meeting ISO 26262 ASIL-B functional safety requirements. |
Use Scenario: Biasing 4–20 mA current-loop transmitter ICs in hazardous-area process instrumentation. IC Role / Device Role / Timing Role: Precision 2.5 V reference for DAC and op-amp gain-setting resistors in loop-powered transmitters. Use Value: Maintains 0.01% linearity over 20-year field life due to 120 ppm long-term stability and 0.08% thermal hysteresis. |
| Portable Medical Glucose Meter | Energy Meter ADC Reference |
Use Scenario: Providing reference voltage for electrochemical sensor signal conditioning in handheld diagnostic devices. IC Role / Device Role / Timing Role: Low-noise (20 μVrms) 1.24 V reference for transimpedance amplifier and 16-bit SAR ADC front-end. Use Value: Achieves <12.5 ENOB by minimizing noise floor contribution - critical for sub-mg/dL glucose resolution. |
Use Scenario: Setting accurate full-scale input for polyphase energy metering ICs (e.g., ADE78xx) in smart grid meters. IC Role / Device Role / Timing Role: 2.4 V reference derived from LM4041QDIM3-ADJ/NO FB network, driving metrology ADC reference input. Use Value: Ensures Class 0.2 accuracy compliance per IEC 62053-21 via <±50 ppm total error (initial + temp + aging). |
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 reference; no adjustable FB pin; higher 100 μA min current; 50 ppm/°C tempco | Lacks programmability - requires redesign of resistor network for non-2.5 V outputs; unsuitable for <100 μA ultra-low-power apps | Select when fixed 2.5 V output suffices and higher initial accuracy (±1%) is needed at lower cost |
| MAX6126AASA+ | Series reference (not shunt); 3-pin SO-8; 0.04% initial accuracy; 3 ppm/°C tempco; 1.5 mA quiescent | Requires input-to-output headroom; incompatible with shunt topology; not AEC-Q100 qualified | Select for ultra-high-precision lab equipment where series topology and lowest drift are prioritized over automotive compliance |
Compared with TL431CDBVR and MAX6126AASA+, the LM4041QDIM3-ADJ/NO uniquely combines AEC-Q100 Grade 1 qualification, adjustable output (1.24–10 V), ultra-low 60 μA operating current, and SOT-23-3 footprint - making it the only drop-in solution for automotive shunt reference upgrades requiring programmability and extended temperature support.
Availability
LM4041QDIM3-ADJ/NO is available at Aetrix Electronics and suitable for automotive ECU designs, industrial sensor transmitters, portable medical diagnostics, and smart energy metering requiring stable component supply with guaranteed long-term availability and automotive-grade traceability.
Supply support for LM4041QDIM3-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 expertise in precision voltage references and automotive-qualified components.
The LM4041-N-Q1 product line was designed specifically for automotive applications demanding robustness across −40°C to +125°C, including engine control, battery management, and ADAS sensor interfaces - emphasizing AEC-Q100 compliance, low drift, and long-term reliability.
FAQ
What is the maximum output voltage achievable with LM4041QDIM3-ADJ/NO?
The LM4041QDIM3-ADJ/NO supports output voltages from 1.24 V up to 10 V when configured with an external resistor divider on the FB pin. This upper limit is specified in the datasheet's Recommended Operating Conditions table and is constrained by internal junction voltage ratings - exceeding 10 V risks permanent damage. The LM4041QDIM3-ADJ/NO achieves this range while maintaining ±1.0% initial tolerance and 100 ppm/°C temperature coefficient across the full span.
Is LM4041QDIM3-ADJ/NO pin-compatible with other LM4041 variants in SOT-23-3?
Yes, the LM4041QDIM3-ADJ/NO uses the standard SOT-23-3 pinout shared across all LM4041-N-Q1 adjustable versions: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = FB. This allows direct substitution within the same grade (D-grade) and package type without PCB changes. However, fixed-voltage variants (e.g., LM4041QAIM3-ADJ) share the same pinout but differ in internal reference structure - always verify schematic net connections before replacement.
How does the LM4041QDIM3-ADJ/NO achieve stability without an output capacitor?
The LM4041QDIM3-ADJ/NO integrates internal frequency compensation that ensures unconditional stability with any capacitive load, eliminating the need for external output capacitors. This is achieved through a carefully tuned pole-zero network in its bandgap core and shunt regulator loop - validated across 0–10 μF capacitance and −40°C to +125°C. The LM4041QDIM3-ADJ/NO maintains phase margin >45° under all tested conditions, unlike older shunt references requiring 1–10 nF ceramic caps.
What is the significance of the "/NO" suffix in LM4041QDIM3-ADJ/NO?
The "/NO" suffix in LM4041QDIM3-ADJ/NO indicates TI's "No Option" tape-and-reel packaging configuration - meaning the part ships in standard 3000-unit reels with no special marking, labeling, or traceability enhancements beyond standard lot coding. It is functionally identical to LM4041QDIM3-ADJ but designated for general-purpose volume production rather than automotive-specific traceability packages (e.g., "/Q1" or "/A0"). The LM4041QDIM3-ADJ/NO remains fully AEC-Q100 Grade 1 qualified.
Can LM4041QDIM3-ADJ/NO be used in series with a load instead of shunt configuration?
No - the LM4041QDIM3-ADJ/NO is strictly a shunt voltage reference and must be connected in parallel with the load, sinking excess current to ground via the anode. It cannot operate as a series regulator because it lacks an input pin and internal pass element. Attempting series connection will prevent regulation and may damage the LM4041QDIM3-ADJ/NO due to reverse biasing or excessive power dissipation. Always use the cathode–anode–FB topology shown in TI's Figure 9-2.
LM4041QDIM3-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:
- 70 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041QDIM3-ADJ/NO FAQ
1.How can I place an order for LM4041QDIM3-ADJ/NO through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041QDIM3-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 LM4041QDIM3-ADJ/NO reliable?
The price and inventory of LM4041QDIM3-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 LM4041QDIM3-ADJ/NO is usually 5 days.
3.What payment methods are accepted for LM4041QDIM3-ADJ/NO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041QDIM3-ADJ/NO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041QDIM3-ADJ/NO?
LM4041QDIM3-ADJ/NO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041QDIM3-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 LM4041QDIM3-ADJ/NO?
For technical support, including LM4041QDIM3-ADJ/NO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041QDIM3-ADJ/NO requirements.
6.How does Aetrix verify that LM4041QDIM3-ADJ/NO is sourced from the original manufacturer or authorized distributors?
All LM4041QDIM3-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 LM4041QDIM3-ADJ/NO meets industry standards.
7.What is the process for return or replacement of LM4041QDIM3-ADJ/NO?
All LM4041QDIM3-ADJ/NO units undergo pre-shipment inspection (PSI). If there is an issue with LM4041QDIM3-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 LM4041QDIM3-ADJ/NO part is unused and in its original packaging.
Return procedure for LM4041QDIM3-ADJ/NO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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