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Texas Instruments LM4041BIM3X-1.2/NOPB
- Part No.:
- LM4041BIM3X-1.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041BIM3X-1.2/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,730
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Product details
Overview
LM4041BIM3X-1.2/NOPB from Texas Instruments is a precision 1.225 V shunt voltage reference in SOT-23-3 package, rated for industrial temperature range (−40°C to +85°C), with ±0.2% initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and 20 μVRMS wideband noise (10 Hz–10 kHz). It delivers stable reference performance in low-power data-acquisition front-ends and battery-powered sensor signal chains.
For engineers reviewing the LM4041BIM3X-1.2/NOPB datasheet, LM4041BIM3X-1.2/NOPB pinout, LM4041BIM3X-1.2/NOPB application, or LM4041BIM3X-1.2/NOPB equivalent, key selection criteria include reverse breakdown voltage accuracy over temperature, minimum operating current (60 μA), dynamic impedance (≤1.5 Ω), capacitive load stability, and AEC-Q100 Grade 3 qualification for automotive subsystems.
Technical Context
The LM4041BIM3X-1.2/NOPB uses a bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its cathode-anode configuration operates as a two-terminal device requiring only an external current source and optional output capacitor.
It achieves stable regulation without mandatory output capacitance and tolerates arbitrary capacitive loads-enabling direct interface with SAR ADC reference inputs, op-amp feedback networks, and microcontroller VREF pins without phase-margin concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal reverse breakdown voltage; fixed value enables direct use in 1.2 V system biasing and low-voltage ADC references. |
| Initial Tolerance | ±0.2% at 25°C (B-grade); corresponds to ±2.4 mV absolute error, supporting 12-bit+ precision in portable instrumentation. |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +85°C; contributes ≤±8.5 mV drift across full range, critical for uncalibrated field-deployed sensors. |
| Min Operating Current | 60 μA at 25°C; allows operation from high-impedance dividers or micropower supervisors in energy-harvesting nodes. |
| Noise (10 Hz–10 kHz) | 20 μVRMS; low enough to avoid degrading ENOB in 16-bit delta-sigma ADCs without additional filtering. |
| Dynamic Impedance | ≤1.5 Ω at 1 mA; ensures <1 mV load regulation shift per 1 mA current change, simplifying current-source design. |
| Long-Term Stability | 120 ppm after 1000 hrs; supports >10-year calibration intervals in metering and industrial control applications. |
Pinout & Package
SOT-23-3 package (DBZ), body size 1.30 mm × 2.92 mm, with gull-wing leads. Pin 1 = Cathode (I/O), Pin 2 = Anode (O, normally grounded), Pin 3 = NC (must float or connect to anode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Shunt current path and output node | Connects to regulated voltage rail; sinks all current not drawn by load; defines reference potential. |
| 2 (Anode) | Reference ground return | Must be connected to system ground; forms the low-side reference point for cathode voltage measurement. |
| 3 (NC) | No-connect terminal | Internally unused; TI recommends floating or tying to anode to reduce EMI susceptibility near switching noise sources. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables space-constrained PCB layouts in wearables and IoT edge nodes without stability risk. |
| Tolerates capacitive loads | Supports direct connection to ADC input caps (≥1 nF) and op-amp unity-gain buffers without oscillation. |
| Low 60 μA minimum current | Permits use with 1 MΩ current-setting resistors from 3.3 V rails, reducing quiescent power to <200 μW. |
| 20 μVRMS noise | Meets noise floor requirements for 16-bit precision analog front-ends without post-regulation filtering. |
| AEC-Q100 Grade 3 qualified | Validated for automotive cabin electronics (−40°C to +85°C), including infotainment power monitors and ADAS sensor biasing. |
Applications
| Battery-Powered Sensor Node | Data-Acquisition Front-End |
|---|---|
Use Scenario: Ultra-low-power environmental sensor (temperature/humidity) powered by coin cell, transmitting via BLE. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for 12-bit SAR ADC measuring conditioned sensor output. Use Value: 60 μA min current enables >5-year battery life; ±0.2% tolerance avoids factory calibration; 20 μVRMS noise preserves measurement resolution. | Use Scenario: Industrial 4–20 mA loop-powered transmitter with local analog sensing. IC Role / Device Role / Timing Role: Supplies precision reference to instrumentation amplifier and ADC in isolated analog signal chain. Use Value: 100 ppm/°C tempco ensures <±0.1% gain error over plant ambient range; no capacitor needed simplifies conformal coating process. |
| Automotive Cabin Control Unit | Energy Meter Reference Subsystem |
Use Scenario: HVAC control module monitoring thermistor networks and potentiometer inputs. IC Role / Device Role / Timing Role: Shunt reference for microcontroller ADC channels reading analog sensor signals. Use Value: AEC-Q100 Grade 3 qualification guarantees operation at +85°C under dashboard; NC pin tie-to-anode reduces EMI coupling from nearby CAN transceivers. | Use Scenario: Class 0.5 smart electricity meter requiring metrology-grade voltage reference. IC Role / Device Role / Timing Role: Primary reference for 24-bit delta-sigma ADC measuring mains voltage via resistive divider. Use Value: 120 ppm long-term stability meets IEC 62053-21 10-year accuracy retention; low noise avoids digital filtering overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4041CIM3X-1.2/NOPB | ±0.5% initial tolerance (C-grade) vs. ±0.2% (B-grade); otherwise identical specs and pinout. | Acceptable where 10-bit system accuracy suffices; lower cost for non-critical biasing. | Select when budget constraints outweigh need for 12-bit+ reference accuracy. |
| TLVH431ACDBVR | Adjustable 1.24–18 V output; 2% initial tolerance; higher 80 μA min current; SOT-23-3 pin-compatible but different internal topology. | Used where programmable reference or higher voltage is required; not suitable for fixed 1.225 V precision roles. | Choose only if adjustable output or wider voltage range is essential; not a drop-in replacement. |
Compared with LM4041CIM3X-1.2/NOPB, the LM4041BIM3X-1.2/NOPB provides tighter initial tolerance for higher-resolution systems, while TLVH431ACDBVR trades precision for flexibility and higher voltage capability-neither offers identical performance, so selection depends on whether accuracy, adjustability, or cost drives the design.
Availability
LM4041BIM3X-1.2/NOPB is available at Aetrix Electronics and suitable for battery-powered equipment, data-acquisition systems, and automotive electronics requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LM4041BIM3X-1.2/NOPB 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 delivering analog and embedded processing solutions, with decades of expertise in precision reference design and automotive-qualified components.
The LM4041-N series was engineered for space-constrained, low-power applications demanding high initial accuracy and thermal stability-targeting instrumentation, energy metering, and automotive subsystems where board area and quiescent current are critical.
FAQ
What is the maximum operating current for LM4041BIM3X-1.2/NOPB?
The LM4041BIM3X-1.2/NOPB supports a maximum operating current of 12 mA. This limit ensures safe power dissipation within the SOT-23 package's 306 mW rating at 25°C ambient. Exceeding this current risks thermal overload and long-term reliability degradation. The device maintains regulation across its full 60 μA to 12 mA range, making it suitable for both micropower and moderate-current reference applications. Always verify junction temperature using θJA = 291.9°C/W when designing for elevated ambient conditions.
Does LM4041BIM3X-1.2/NOPB require an output capacitor for stability?
No, the LM4041BIM3X-1.2/NOPB does not require an output capacitor for stability. Its internal design eliminates the need for external stabilization capacitance-a key advantage over older shunt references. It remains stable with any capacitive load, including direct connection to ADC input capacitors or op-amp inputs. This feature simplifies layout, reduces BOM count, and improves reliability in high-vibration environments where capacitor solder joints may fatigue. TI confirms stability across 0–10 μF load capacitance in the official datasheet.
What is the temperature range specification for LM4041BIM3X-1.2/NOPB?
The LM4041BIM3X-1.2/NOPB is specified for the industrial temperature range of −40°C to +85°C. It is also AEC-Q100 Grade 3 qualified, confirming suitability for automotive cabin applications within that same ambient range. The device's 100 ppm/°C maximum temperature coefficient ensures predictable voltage drift across this span, and its electrical characteristics-including ±0.2% initial tolerance and 20 μVRMS noise-are guaranteed over the full range. Extended temperature variants (e.g., LM4041BEM3X-1.2/NOPB) cover −40°C to +125°C but are distinct orderables.
How does the NC pin (Pin 3) function on LM4041BIM3X-1.2/NOPB?
Pin 3 of the LM4041BIM3X-1.2/NOPB is a no-connect (NC) terminal with no internal connection. TI explicitly states it must either be left floating or tied to the anode (Pin 2). In electrically noisy environments-such as near switching regulators or CAN bus traces-connecting Pin 3 to Pin 2 reduces EMI susceptibility by shielding the internal die. This recommendation appears in the official datasheet's Pin Functions section and applies universally across all LM4041-N SOT-23 variants, including the LM4041BIM3X-1.2/NOPB.
Is LM4041BIM3X-1.2/NOPB pin-compatible with other LM4041-N variants in SOT-23?
Yes, the LM4041BIM3X-1.2/NOPB is fully pin-compatible with all other LM4041-N and LM4041-N-Q1 variants offered in the SOT-23-3 (DBZ) package, including LM4041AIM3X-1.2/NOPB, LM4041CIM3X-1.2/NOPB, and LM4041DIM3X-1.2/NOPB. All share identical pinout (Cathode-Anode-NC), mechanical footprint, and thermal characteristics. This allows direct substitution during prototyping or production ramp-provided the required initial tolerance (±0.1%, ±0.2%, etc.) and temperature grade match system requirements. No PCB layout changes are needed for grade or tolerance upgrades within the same package.
LM4041BIM3X-1.2/NOPB 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041BIM3X-1.2/NOPB FAQ
1.How can I place an order for LM4041BIM3X-1.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041BIM3X-1.2/NOPB 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 LM4041BIM3X-1.2/NOPB reliable?
The price and inventory of LM4041BIM3X-1.2/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041BIM3X-1.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4041BIM3X-1.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041BIM3X-1.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041BIM3X-1.2/NOPB?
LM4041BIM3X-1.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041BIM3X-1.2/NOPB 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 LM4041BIM3X-1.2/NOPB?
For technical support, including LM4041BIM3X-1.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041BIM3X-1.2/NOPB requirements.
6.How does Aetrix verify that LM4041BIM3X-1.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4041BIM3X-1.2/NOPB 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 LM4041BIM3X-1.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4041BIM3X-1.2/NOPB?
All LM4041BIM3X-1.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4041BIM3X-1.2/NOPB, 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 LM4041BIM3X-1.2/NOPB part is unused and in its original packaging.
Return procedure for LM4041BIM3X-1.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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