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Texas Instruments LM4041QDIM3-1.2/NO
- Part No.:
- LM4041QDIM3-1.2/NO
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041QDIM3-1.2/NO.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:763
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Product details
Overview
LM4041QDIM3-1.2/NO from Texas Instruments is an automotive-grade precision micropower shunt voltage reference in SOT-23-3 package, delivering a fixed 1.225 V reverse breakdown voltage with ±12 mV (±1.0%) initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and stable operation from 60 μA to 12 mA load current. It serves as a compact, capacitor-free reference in battery-powered sensor signal chains and automotive body control modules.
For engineers reviewing the LM4041QDIM3-1.2/NO datasheet, LM4041QDIM3-1.2/NO pinout, LM4041QDIM3-1.2/NO application, or LM4041QDIM3-1.2/NO equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), no-output-capacitor requirement, low 20 μVrms noise (10 Hz–10 kHz), and compatibility with capacitive loads in space-constrained designs.
Technical Context
The LM4041QDIM3-1.2/NO implements a bandgap-based shunt reference architecture with curvature-corrected temperature drift compensation and Zener-zap wafer-level trimming to achieve ±1.0% initial accuracy. Its two-terminal configuration operates in reverse bias, sinking current through the cathode while maintaining precise voltage across anode-to-cathode terminals.
It requires no external output capacitor due to inherent stability across all capacitive loads, and supports wide operating current range (60 μA–12 mA) without sacrificing voltage regulation or thermal hysteresis (0.08%). The device's low dynamic impedance (≤1.5 Ω at 1 mA) ensures minimal voltage shift under transient load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V reverse breakdown voltage; enables direct replacement of 1.2 V references in ADC/DAC biasing and sensor excitation circuits. |
| Initial Tolerance | ±12 mV (±1.0%) at 25°C; meets Grade D specification for cost-sensitive automotive applications requiring tighter accuracy than standard 2% references. |
| Temp Coefficient | Max 100 ppm/°C over –40°C to +125°C; ensures ≤±12.5 mV total drift across full Grade 1 automotive temperature range. |
| Operating Current | 60 μA min to 12 mA max; supports ultra-low-power wake-up circuits and high-current precision regulators without external buffering. |
| Noise (10 Hz–10 kHz) | 20 μVrms; suitable for 16-bit+ data acquisition systems where reference noise directly limits effective resolution. |
| Long-Term Stability | 120 ppm after 1000 hrs; guarantees <0.015% output drift over product lifetime in engine control units and ADAS modules. |
| Thermal Hysteresis | 0.08%; maintains repeatability during thermal cycling in under-hood electronics and powertrain controllers. |
Pinout & Package
SOT-23-3 package (1.30 mm × 2.92 mm body size) with gull-wing leads; thermally optimized for PCB mounting with 291.9°C/W junction-to-ambient resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode | Shunt current sink and output node | Connected to regulated voltage rail; sinks all load and reference current-must be decoupled locally if driving noisy digital loads. |
| Anode | Reference ground return | Typically tied to system ground; forms the voltage reference point-requires low-impedance path to avoid ground bounce errors. |
| NC | No-connect terminal | Internally unconnected; must remain floating or tied to anode per datasheet-no routing or soldering required. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient temperatures from –40°C to +125°C-enables use in engine control, transmission, and chassis modules without derating. |
| No output capacitor required | Stable with any capacitive load-including 10 µF ceramic bypass caps-eliminates BOM cost and board area for external stabilization. |
| Tolerates capacitive loads | Immune to oscillation with >100 nF load capacitance-simplifies layout in motor drivers and power supply feedback networks. |
| Low 20 μVrms noise | Enables 16-bit effective resolution in precision SAR ADCs without additional filtering or low-noise op-amp buffering. |
| 60 μA minimum operating current | Supports always-on sensor biasing in vehicle security systems and tire pressure monitoring with sub-10 µA quiescent system power. |
Applications
| Automotive Body Control Module | Portable Gas Sensor Interface |
|---|---|
Use Scenario: Provides stable 1.225 V reference for analog front-end of door lock actuator current sensing and interior lighting PWM dimming. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precision current-sense threshold and LED current regulation setpoint. Use Value: Enables ±1% current measurement accuracy over –40°C to +125°C without calibration, reducing ECU firmware complexity. | Use Scenario: Supplies excitation voltage to electrochemical CO sensor in handheld air quality monitors powered by single-cell Li-ion. IC Role / Device Role / Timing Role: Low-power shunt reference generating stable bias for sensor transimpedance amplifier and ADC reference input. Use Value: Delivers 20 μVrms noise floor and 60 μA startup current-extending battery life beyond 12 months while maintaining 10 ppm gas detection resolution. |
| Industrial Temperature Transmitter | Medical Patient Monitor Analog Front-End |
Use Scenario: Sets reference voltage for 4–20 mA loop transmitter conditioning circuitry in HVAC and process control field devices. IC Role / Device Role / Timing Role: Precision shunt reference defining DAC output scaling and current-loop compliance voltage threshold. Use Value: Maintains ±12 mV accuracy across industrial temperature range (–40°C to +85°C), eliminating need for on-site recalibration. | Use Scenario: Supplies reference to ECG amplifier stage and 24-bit delta-sigma ADC in portable patient vital signs monitor. IC Role / Device Role / Timing Role: Low-noise, low-drift shunt reference ensuring baseline stability for microvolt-level biopotential signal digitization. Use Value: Achieves 0.08% thermal hysteresis and 120 ppm long-term stability-meeting IEC 60601-2-27 ECG 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 |
|---|---|---|---|
| LM4040QDEM3-1.2/NO | Same SOT-23-3 package, AEC-Q100 Grade 1, but ±2% initial tolerance (24 mV) and 150 ppm/°C max tempco. | Acceptable where cost sensitivity outweighs precision-e.g., non-critical power supply supervision in infotainment systems. | Select when ±2% accuracy suffices and lower unit cost is prioritized over long-term stability or noise performance. |
| MAX6008AEUR+T | Fixed 1.25 V output, ±0.2% initial accuracy, 75 ppm/°C tempco, but only rated for –40°C to +85°C industrial grade-not automotive qualified. | Suitable for medical or test equipment where extended temperature is not required but tighter initial tolerance is critical. | Choose for higher-precision non-automotive applications needing better than ±1% accuracy and lower tempco, accepting industrial temp range limitation. |
Compared with LM4041QDIM3-1.2/NO, LM4040QDEM3-1.2/NO trades 2× worse initial accuracy and higher tempco for lower cost, while MAX6008AEUR+T offers superior precision and lower noise but lacks AEC-Q100 qualification-making LM4041QDIM3-1.2/NO the optimal balance of automotive reliability, 1.0% accuracy, and micropower operation.
Availability
LM4041QDIM3-1.2/NO is available at Aetrix Electronics and suitable for automotive body control modules, portable gas sensor interfaces, and industrial temperature transmitters requiring stable component supply with guaranteed AEC-Q100 compliance and long-term parametric consistency.
Supply support for LM4041QDIM3-1.2/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 analog ICs and automotive-qualified components.
The LM4041-N-Q1 product line delivers AEC-Q100-qualified shunt voltage references designed specifically for automotive subsystems demanding high accuracy, low power, and robust thermal performance under harsh environmental conditions.
FAQ
What is the maximum operating temperature range supported by the LM4041QDIM3-1.2/NO?
The LM4041QDIM3-1.2/NO is AEC-Q100 Grade 1 qualified, supporting continuous operation from –40°C to +125°C ambient temperature. This rating is validated per TI's automotive qualification protocol and applies to the full electrical performance envelope-including ±12 mV initial tolerance and 100 ppm/°C temperature coefficient-without derating.
Does the LM4041QDIM3-1.2/NO require an external output capacitor for stability?
No, the LM4041QDIM3-1.2/NO does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including values up to 10 µF. This eliminates BOM cost and PCB area typically needed for stabilization in shunt references like the LM4040 series.
What is the minimum cathode current needed for the LM4041QDIM3-1.2/NO to regulate within specification?
The LM4041QDIM3-1.2/NO requires a minimum cathode current of 60 μA at 25°C to maintain regulation within its specified voltage tolerance. At full temperature range (–40°C to +125°C), the minimum increases to 65 μA-ensuring reliable startup and regulation in ultra-low-power automotive sleep-mode circuits.
How does the LM4041QDIM3-1.2/NO compare to the LM4041AIM3-1.2 in terms of accuracy and qualification?
The LM4041QDIM3-1.2/NO is automotive-qualified (AEC-Q100 Grade 1) with ±1.0% initial tolerance, whereas the LM4041AIM3-1.2 is industrial-grade with ±0.1% accuracy but no automotive qualification. The Q-part trades tighter initial spec for guaranteed high-temp reliability-making LM4041QDIM3-1.2/NO appropriate for under-hood applications where environmental robustness outweighs raw precision.
Can the LM4041QDIM3-1.2/NO be used in place of adjustable references like the LM4041QADJ?
No-the LM4041QDIM3-1.2/NO is a fixed 1.225 V shunt reference with no feedback pin; it cannot replicate the programmable output of the LM4041QADJ variant. Substituting requires redesigning the reference network and verifying load regulation, as the ADJ version uses a three-terminal topology with separate FB input and different dynamic impedance characteristics.
LM4041QDIM3-1.2/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:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.225V
- Voltage - Output (Max):
- -
- 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
LM4041QDIM3-1.2/NO FAQ
1.How can I place an order for LM4041QDIM3-1.2/NO through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041QDIM3-1.2/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 LM4041QDIM3-1.2/NO reliable?
The price and inventory of LM4041QDIM3-1.2/NO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041QDIM3-1.2/NO is usually 5 days.
3.What payment methods are accepted for LM4041QDIM3-1.2/NO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041QDIM3-1.2/NO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041QDIM3-1.2/NO?
LM4041QDIM3-1.2/NO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041QDIM3-1.2/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 LM4041QDIM3-1.2/NO?
For technical support, including LM4041QDIM3-1.2/NO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041QDIM3-1.2/NO requirements.
6.How does Aetrix verify that LM4041QDIM3-1.2/NO is sourced from the original manufacturer or authorized distributors?
All LM4041QDIM3-1.2/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 LM4041QDIM3-1.2/NO meets industry standards.
7.What is the process for return or replacement of LM4041QDIM3-1.2/NO?
All LM4041QDIM3-1.2/NO units undergo pre-shipment inspection (PSI). If there is an issue with LM4041QDIM3-1.2/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 LM4041QDIM3-1.2/NO part is unused and in its original packaging.
Return procedure for LM4041QDIM3-1.2/NO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041QDIM3-1.2/NO Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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