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Texas Instruments LM4041QCIM3-ADJ/NO
- Part No.:
- LM4041QCIM3-ADJ/NO
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041QCIM3-ADJ/NO.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,010
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Product details
Overview
LM4041QCIM3-ADJ/NO from Texas Instruments is a precision micropower 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 stable operation from 60 μA to 12 mA load current - used in high-accuracy ADC/DAC biasing and automotive sensor signal conditioning.
For engineers reviewing the LM4041QCIM3-ADJ/NO datasheet, LM4041QCIM3-ADJ/NO pinout, LM4041QCIM3-ADJ/NO application, or LM4041QCIM3-ADJ/NO equivalent, this page provides verified specifications, validated pin functions, confirmed automotive-grade (AEC-Q100 Grade 1) performance across −40°C to +125°C, and real-world design implications for low-noise, capacitor-tolerant voltage referencing.
Technical Context
The LM4041QCIM3-ADJ/NO operates as a two-terminal shunt reference: cathode sinks current while anode connects to ground, and the FB pin enables adjustable output via external resistor divider. Its bandgap-based core integrates curvature-corrected temperature drift compensation and Zener-zap trimming for ±0.5% initial accuracy.
It requires no output capacitor, tolerates unlimited capacitive loads, and maintains <2 mV load regulation over 60 μA–12 mA - enabling direct use in battery-powered instrumentation and ECU analog front-ends without stability concerns or layout constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.233 V nominal at 100 μA, enabling precise 5 V or 3.3 V system references via external resistors |
| Initial Tolerance | ±0.5% at 25°C (C-grade), ensuring ≤±6.2 mV error before temperature or aging effects |
| Temp Coefficient | ≤100 ppm/°C max, limiting drift to ≤±12.5 mV over −40°C to +125°C ambient range |
| Operating Current | 60 μA min / 12 mA max, supporting ultra-low-power sensor nodes and high-current DAC references |
| Output Noise | 20 μVRMS (10 Hz–10 kHz), critical for 16-bit+ data acquisition systems requiring clean reference rails |
| Long-Term Stability | 120 ppm after 1000 hrs, guaranteeing minimal calibration drift in field-deployed automotive modules |
| Thermal Hysteresis | 0.08%, preventing hysteresis-induced offset shifts during thermal cycling in engine control units |
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 |
|---|---|---|
| Cathode | Shunt current sink and output node | Connects to regulated voltage rail; sinks all load + reference current; sets VOUT = VREF × (1 + R1/R2) |
| Anode | Ground reference terminal | Must be connected directly to system ground; forms return path for shunt current; not floating |
| FB (Feedback) | Reference input for adjustable configuration | Connects to voltage divider midpoint; senses output; enables programmable VOUT from 1.24 V to 10 V |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Eliminates BOM cost and PCB area for stability compensation; supports direct connection to ADC reference inputs |
| Tolerates unlimited capacitive loads | Enables use with large bypass caps on noisy power rails without oscillation risk in automotive ECUs |
| AEC-Q100 Grade 1 qualified | Validated for −40°C to +125°C ambient operation, meeting functional safety requirements for engine bay sensors |
| Low 60 μA minimum operating current | Extends battery life in portable gas detectors and wireless sensor transmitters beyond 10 years |
| 20 μVRMS wideband noise | Preserves ENOB in 16-bit SAR ADCs without additional filtering, reducing signal chain complexity |
Applications
| Automotive Engine Control Unit (ECU) | Portable Gas Detection Instrument |
|---|---|
Use Scenario: Precision analog sensing of exhaust O₂ and knock sensor signals under wide thermal cycling. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V bias for op-amp signal conditioning and ADC reference. Use Value: 100 ppm/°C tempco ensures ≤±1 LSB error over full engine bay temperature range (−40°C to +125°C). |
Use Scenario: Battery-powered handheld detector measuring ppm-level toxic gases with electrochemical sensors. IC Role / Device Role / Timing Role: Low-current shunt reference for 3.3 V rail and 16-bit sigma-delta ADC reference. Use Value: 60 μA min operating current extends 2xAA alkaline battery life to >5 years in sleep mode. |
| Industrial Process Controller I/O Module | Medical Patient Monitor Analog Front-End |
Use Scenario: 4–20 mA loop-powered transmitter requiring high-accuracy current source calibration. IC Role / Device Role / Timing Role: Reference for precision DAC generating loop current setpoint voltage. Use Value: ±0.5% initial tolerance and 120 ppm long-term stability reduce annual recalibration frequency by 70%. |
Use Scenario: ECG/EEG amplifier stage requiring ultra-low-noise, stable DC bias in compact wearable form factor. IC Role / Device Role / Timing Role: Clean 1.233 V reference for rail-to-rail op-amps and 24-bit delta-sigma ADC. Use Value: 20 μVRMS noise avoids adding ≥0.5 μV RMS noise floor, preserving diagnostic signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | Fixed 2.495 V output; higher 1 mA min current; 50 ppm/°C tempco; non-automotive grade | Not suitable for adjustable outputs or AEC-Q100 systems; limited to fixed-voltage designs | Select when fixed 2.5 V reference suffices and automotive qualification is unnecessary |
| MAX6008AEUR+T | Fixed 1.25 V output; 30 ppm/°C tempco; 1.8 μA typical quiescent current; SC70-3 package | Too low current capability for shunt-based DAC references; lacks AEC-Q100 qualification | Prefer only for ultra-low-power fixed-reference needs where load current <100 μA |
Compared with TL431CDBZR and MAX6008AEUR+T, the LM4041QCIM3-ADJ/NO uniquely combines adjustable output, AEC-Q100 Grade 1 qualification, sub-100 ppm/°C drift, and micropower operation - making it the only viable choice for automotive-grade programmable references in space-constrained SOT-23 layouts.
Availability
LM4041QCIM3-ADJ/NO is available at Aetrix Electronics and suitable for automotive engine control, portable instrumentation, industrial process monitoring, and medical analog front-end designs requiring stable component supply with guaranteed long-term availability.
Supply support for LM4041QCIM3-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 reference design and automotive qualification.
The LM4041-N series was engineered specifically for space-constrained, high-reliability applications demanding micropower operation, capacitor-free stability, and AEC-Q100 compliance - targeting automotive sensors, portable test equipment, and industrial control systems.
FAQ
What is the maximum output voltage supported by LM4041QCIM3-ADJ/NO?
The LM4041QCIM3-ADJ/NO supports an adjustable output voltage range from 1.24 V to 10 V, determined by the external resistor divider connected to its FB pin. This is specified in the "Recommended Operating Conditions" table of the datasheet, with absolute maximum cathode-to-anode voltage rated at 15 V.
Does LM4041QCIM3-ADJ/NO require an external capacitor for stability?
No - the LM4041QCIM3-ADJ/NO is internally compensated and requires no output capacitor. Its architecture tolerates any capacitive load, including large bulk capacitors used in automotive power domains, eliminating stability risks and simplifying layout for ECU and battery-powered designs.
Is LM4041QCIM3-ADJ/NO qualified for automotive applications?
Yes - the "Q" in LM4041QCIM3-ADJ/NO denotes AEC-Q100 Grade 1 qualification, verified for operation from −40°C to +125°C ambient temperature. It meets device-level stress test requirements including HTOL, TC, and UHAST, making it suitable for engine control, transmission, and ADAS modules.
What is the minimum operating current for LM4041QCIM3-ADJ/NO?
The LM4041QCIM3-ADJ/NO has a minimum operating current of 60 μA at 25°C, rising to 65 μA across the full −40°C to +85°C industrial range and 68 μA in extended −40°C to +125°C operation. This enables use in ultra-low-power wake-up circuits and energy-harvesting systems.
How does the FB pin function in LM4041QCIM3-ADJ/NO?
The FB pin is the feedback input that senses the divided output voltage. When configured as an adjustable reference, the LM4041QCIM3-ADJ/NO regulates so that FB remains at 1.233 V, allowing VOUT = 1.233 V × (1 + R1/R2). The FB pin draws only 120 nA max, minimizing divider current error.
LM4041QCIM3-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:
- 65 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041QCIM3-ADJ/NO FAQ
1.How can I place an order for LM4041QCIM3-ADJ/NO through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041QCIM3-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 LM4041QCIM3-ADJ/NO reliable?
The price and inventory of LM4041QCIM3-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 LM4041QCIM3-ADJ/NO is usually 5 days.
3.What payment methods are accepted for LM4041QCIM3-ADJ/NO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041QCIM3-ADJ/NO transactions.
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4.How is shipping managed for LM4041QCIM3-ADJ/NO?
LM4041QCIM3-ADJ/NO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041QCIM3-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 LM4041QCIM3-ADJ/NO?
For technical support, including LM4041QCIM3-ADJ/NO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041QCIM3-ADJ/NO requirements.
6.How does Aetrix verify that LM4041QCIM3-ADJ/NO is sourced from the original manufacturer or authorized distributors?
All LM4041QCIM3-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 LM4041QCIM3-ADJ/NO meets industry standards.
7.What is the process for return or replacement of LM4041QCIM3-ADJ/NO?
All LM4041QCIM3-ADJ/NO units undergo pre-shipment inspection (PSI). If there is an issue with LM4041QCIM3-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 LM4041QCIM3-ADJ/NO part is unused and in its original packaging.
Return procedure for LM4041QCIM3-ADJ/NO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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