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Texas Instruments LM4041QBIM3-1.2/NO
- Part No.:
- LM4041QBIM3-1.2/NO
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041QBIM3-1.2/NO.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,977
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Product details
Overview
LM4041QBIM3-1.2/NO from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a fixed 1.225 V reverse breakdown voltage with ±0.2% initial tolerance (B-grade), 100 ppm/°C max temperature coefficient, 20 μVrms wideband noise (10 Hz–10 kHz), 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.
For engineers reviewing the LM4041QBIM3-1.2/NO datasheet, LM4041QBIM3-1.2/NO pinout, LM4041QBIM3-1.2/NO application, or LM4041QBIM3-1.2/NO equivalent, key selection criteria include automotive-grade qualification (AEC-Q100 Grade 1), no-output-capacitor operation, thermal hysteresis ≤0.08%, long-term stability of 120 ppm over 1000 hours, and compatibility with capacitive loads up to 10 nF.
Technical Context
The LM4041QBIM3-1.2/NO implements a bandgap-based shunt architecture with curvature-corrected temperature drift compensation and Zener-zap wafer-level trimming to achieve ±0.2% accuracy at 25°C. Its low dynamic impedance (≤1.5 Ω at 1 mA) and stable regulation across 60 μA–12 mA enable precise biasing in low-power ADCs and comparators.
Unlike series references, it operates as a two-terminal device requiring only an external current source; the cathode provides both shunt current path and output voltage node, while the anode connects to system ground. Feedback pin is absent-this is the fixed 1.2 V variant, not the adjustable version.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; ±0.2% initial tolerance ensures ≤2.45 mV absolute error at 25°C for high-accuracy DAC/ADC calibration. |
| Tempco | ≤100 ppm/°C max; guarantees <±8.5 mV drift over −40°C to +125°C ambient, critical for automotive under-hood sensors. |
| Operating Current | 60–12,000 μA range; supports ultra-low-power wake-up circuits (e.g., 60 μA sleep mode) and full-load precision monitoring (12 mA). |
| Noise (10 Hz–10 kHz) | 20 μVrms; enables sub-12-bit effective resolution preservation in 16-bit SAR ADC front-ends without filtering overhead. |
| Long-Term Stability | 120 ppm over 1000 hrs; reduces recalibration frequency in industrial process controllers and energy metering systems. |
| Thermal Hysteresis | 0.08% max; limits voltage shift to ≤0.98 mV after thermal cycling, essential for repeatable measurements in test equipment. |
| Dynamic Impedance | ≤1.5 Ω at 1 mA; maintains output regulation within ±1.5 mV during fast load transients in portable instrumentation. |
Pinout & Package
SOT-23-3 package (1.30 mm × 2.92 mm body size), surface-mount, lead-free, RoHS-compliant. Thermal resistance θJA = 291.9°C/W (board-mounted).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink & output node | Provides regulated 1.225 V referenced to anode; must be connected to current source and load; handles full operating current (60 μA–12 mA). |
| Anode (Pin 2) | Reference ground terminal | Internally tied to substrate ground; must be connected to system ground plane for stable regulation and minimal noise coupling. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must remain floating or tied to anode per datasheet; no routing or PCB trace required. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Rated for −40°C to +125°C ambient operation with full electrical specs guaranteed-enables direct use in automotive engine control and ADAS modules. |
| No output capacitor required | Stable with any capacitive load (including 10 nF bypass caps); eliminates BOM cost, board space, and startup delay in space-constrained wearables and IoT nodes. |
| Tolerates capacitive loads | Immune to oscillation with >10 nF load capacitance; simplifies layout in noisy environments where local decoupling is mandatory. |
| Low quiescent current | 60 μA minimum operating current enables >10-year battery life in coin-cell-powered remote sensors and smart meters. |
| Low output noise | 20 μVrms broadband noise allows direct interface to 16-bit delta-sigma ADCs without additional filtering components. |
Applications
| Battery-Powered Sensor Nodes | Automotive Engine Control Units |
|---|---|
Use Scenario: Low-power temperature/humidity sensor in wireless mesh network node powered by CR2032 battery. IC Role / Device Role / Timing Role: Shunt voltage reference for ADC input scaling and microcontroller VREF input. Use Value: 60 μA min operating current extends battery life beyond 5 years; no-output-capacitor design saves PCB area in 8-mm² module. | Use Scenario: Coolant temperature sensing in gasoline engine ECU exposed to under-hood temperatures up to 125°C. IC Role / Device Role / Timing Role: Precision bias reference for thermistor measurement amplifier and ADC reference rail. Use Value: AEC-Q100 Grade 1 qualification and ≤100 ppm/°C tempco ensure ±0.5°C measurement accuracy across full automotive temperature range. |
| Portable Medical Instrumentation | Industrial Process Transmitters |
Use Scenario: Handheld blood glucose meter requiring clinical-grade accuracy and single-CR2032 operation. IC Role / Device Role / Timing Role: Stable 1.225 V reference for electrochemical sensor signal conditioning and 14-bit SAR ADC. Use Value: 20 μVrms noise and 0.08% thermal hysteresis preserve repeatability across on/off thermal cycles during field use. | Use Scenario: 4–20 mA loop-powered pressure transmitter installed in chemical plant with ambient swings from −40°C to +85°C. IC Role / Device Role / Timing Role: Primary voltage reference for analog front-end and digital isolator supply regulation. Use Value: 120 ppm long-term stability minimizes annual calibration drift; SOT-23 package withstands reflow and vibration per IEC 60068-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4041CIM3-1.2 | ±0.5% initial tolerance (C-grade), same package and temp range; higher initial error but lower cost. | Suitable for non-critical industrial controls where ±6 mV reference error is acceptable. | Select when cost sensitivity outweighs precision requirements and long-term drift is managed via system calibration. |
| TLVH431ACDBVR | Adjustable 1.24–18 V output; 2% initial tolerance; higher 80-μA min current; SOT-23-3 pinout differs (cathode/anode swapped). | Used where programmable reference or higher output voltage is needed; not drop-in compatible. | Choose only if adjustable output or wider voltage range is required; requires PCB redesign due to pinout mismatch. |
Compared with LM4041CIM3-1.2, the LM4041QBIM3-1.2/NO offers tighter initial tolerance and automotive qualification; compared with TLVH431ACDBVR, it provides fixed 1.225 V, lower noise, and true pin-compatible replacement only within the LM4041 family-not across different shunt reference families.
Availability
LM4041QBIM3-1.2/NO is available at Aetrix Electronics and suitable for automotive engine control units, portable medical instrumentation, and industrial process transmitters requiring stable component supply with guaranteed AEC-Q100 compliance and long-lifecycle support.
Supply support for LM4041QBIM3-1.2/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 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and automotive applications demanding high accuracy, low noise, and robust thermal performance.
FAQ
What is the maximum operating current for LM4041QBIM3-1.2/NO?
The LM4041QBIM3-1.2/NO supports a maximum operating current of 12 mA. This rating is specified across the full industrial and extended temperature ranges (−40°C to +125°C) and ensures stable 1.225 V regulation without degradation in accuracy or noise performance. Exceeding 12 mA risks exceeding the SOT-23 package's power dissipation limit of 306 mW at 25°C ambient.
Is LM4041QBIM3-1.2/NO pin-compatible with other LM4041 variants in SOT-23-3?
Yes, LM4041QBIM3-1.2/NO shares identical SOT-23-3 pinout (Cathode–Anode–NC) with all LM4041-N 1.2 V fixed-voltage variants including LM4041AIM3-1.2, LM4041BIM3-1.2, and LM4041CIM3-1.2. Pin compatibility enables direct substitution within the same grade family, provided thermal and accuracy requirements are met.
Does LM4041QBIM3-1.2/NO require an external capacitor for stability?
No, LM4041QBIM3-1.2/NO does not require an external output capacitor. Its internal design ensures stability with any capacitive load-including 10 nF ceramic bypass caps-eliminating the need for external stabilization components and reducing bill-of-materials count in compact designs.
What is the temperature range supported by LM4041QBIM3-1.2/NO?
The LM4041QBIM3-1.2/NO is qualified for AEC-Q100 Grade 1 operation, supporting ambient temperatures from −40°C to +125°C. All electrical specifications-including 1.225 V output, ±0.2% tolerance, and 100 ppm/°C tempco-are guaranteed across this full extended range, making it suitable for under-hood automotive applications.
How does the long-term stability of LM4041QBIM3-1.2/NO impact calibration intervals?
With 120 ppm long-term stability over 1000 hours at 25°C, LM4041QBIM3-1.2/NO contributes ≤0.15 mV drift in a 1.225 V reference over one year of continuous operation. This enables extended calibration intervals-up to 24 months in industrial transmitters and medical devices-reducing maintenance cost and downtime without sacrificing measurement integrity.
LM4041QBIM3-1.2/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:
- ±0.2%
- 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 ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041QBIM3-1.2/NO FAQ
1.How can I place an order for LM4041QBIM3-1.2/NO through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041QBIM3-1.2/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 LM4041QBIM3-1.2/NO reliable?
The price and inventory of LM4041QBIM3-1.2/NO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041QBIM3-1.2/NO is usually 5 days.
3.What payment methods are accepted for LM4041QBIM3-1.2/NO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041QBIM3-1.2/NO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041QBIM3-1.2/NO?
LM4041QBIM3-1.2/NO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041QBIM3-1.2/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 LM4041QBIM3-1.2/NO?
For technical support, including LM4041QBIM3-1.2/NO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041QBIM3-1.2/NO requirements.
6.How does Aetrix verify that LM4041QBIM3-1.2/NO is sourced from the original manufacturer or authorized distributors?
All LM4041QBIM3-1.2/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 LM4041QBIM3-1.2/NO meets industry standards.
7.What is the process for return or replacement of LM4041QBIM3-1.2/NO?
All LM4041QBIM3-1.2/NO units undergo pre-shipment inspection (PSI). If there is an issue with LM4041QBIM3-1.2/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 LM4041QBIM3-1.2/NO part is unused and in its original packaging.
Return procedure for LM4041QBIM3-1.2/NO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041QBIM3-1.2/NO Tags
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