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Texas Instruments LM4041BIM3-1.2/NOPB
- Part No.:
- LM4041BIM3-1.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041BIM3-1.2/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:11,379
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Product details
Overview
LM4041BIM3-1.2/NOPB from Texas Instruments is a precision 1.225 V shunt voltage reference in SOT-23 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 serves as a stable voltage reference in ADC biasing, sensor excitation, and battery-monitoring circuits.
For engineers reviewing the LM4041BIM3-1.2/NOPB datasheet, LM4041BIM3-1.2/NOPB pinout, LM4041BIM3-1.2/NOPB application, or LM4041BIM3-1.2/NOPB equivalent, key selection criteria include its 60 μA minimum operating current, no-output-capacitor requirement, reverse breakdown stability under capacitive loads, and AEC-Q100 Grade 3 qualification for automotive subsystems.
Technical Context
The LM4041BIM3-1.2/NOPB uses a bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its dynamic impedance remains ≤1.5 Ω at 1 mA, enabling stable regulation across load and temperature variations without external capacitance.
It operates as a two-terminal device: cathode supplies reference voltage and shunt current path, while anode connects to system ground. The SOT-23 package supports surface-mount assembly with 1.30 mm × 2.92 mm footprint and 291.9 °C/W junction-to-ambient thermal resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 1.225 V nominal; fixed output enables direct replacement of 1.2 V references in precision analog signal chains |
| Initial Tolerance | ±0.2% at 25°C (B-grade); ensures ≤2.4 mV absolute error in factory-calibrated systems |
| Tempco | ≤100 ppm/°C over −40°C to +85°C; limits drift to ±8.5 mV across full industrial range |
| Min Operating Current | 60 μA; allows ultra-low-power operation in battery-backed data loggers and IoT sensors |
| Output Noise | 20 μVRMS (10 Hz–10 kHz); supports high-resolution (≥16-bit) ADC reference without added filtering |
| Dynamic Impedance | ≤1.5 Ω at 1 mA; maintains voltage stability under fast transient load changes in closed-loop feedback |
| Capacitive Load Tolerance | Stable with any capacitive load; eliminates need for output capacitor in space-constrained PCB layouts |
Pinout & Package
SOT-23 (DBZ) package: 1.30 mm × 2.92 mm body size, 3-pin surface-mount, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Connects to regulated voltage rail; sinks current to maintain 1.225 V between cathode and anode |
| Anode (Pin 2) | Ground reference terminal | Must be connected to system ground; defines return path for shunt current and sets reference potential |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to anode per TI EMI mitigation guidance |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor operation | Eliminates BOM cost and board area for stabilization capacitor in portable and wearables designs |
| Capacitive load immunity | Enables direct connection to ADC input caps or long traces without oscillation risk |
| AEC-Q100 Grade 3 qualified | Validated for automotive subsystems operating from −40°C to +85°C ambient |
| Low 60 μA start-up current | Supports energy harvesting and coin-cell-powered applications with microamp-level budget |
| 20 μVRMS noise floor | Preserves SNR in precision measurement front-ends without post-regulation filtering |
Applications
| Battery Voltage Monitoring | Portable Data Acquisition |
|---|---|
Use Scenario: Real-time monitoring of Li-ion cell voltage during charge/discharge cycles in handheld medical devices. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225 V reference for 16-bit SAR ADC input scaling. Use Value: ±0.2% tolerance and 100 ppm/°C tempco ensure <±5 mV total error across temperature, meeting IEC 62304 Class C accuracy requirements. |
Use Scenario: Low-power environmental sensor node measuring temperature and humidity with microcontroller-integrated ADC. IC Role / Device Role / Timing Role: Precision voltage reference for ratiometric sensor excitation and ADC reference in sleep/wake cycles. Use Value: 60 μA minimum current enables operation from 3.3 V supply at <10 μA average system current, extending coin-cell life beyond 5 years. |
| Automotive Cabin Sensors | Industrial Process Transmitters |
Use Scenario: Occupancy detection using infrared thermopile sensors in automotive HVAC control modules. IC Role / Device Role / Timing Role: Stable reference for low-noise instrumentation amplifier gain-setting and ADC conversion. Use Value: AEC-Q100 Grade 3 qualification and 20 μVRMS noise enable reliable sub-0.1°C resolution at −40°C to +85°C ambient. |
Use Scenario: 4–20 mA loop-powered pressure transmitter with HART digital overlay in oil & gas field instruments. IC Role / Device Role / Timing Role: Reference source for DAC output scaling and analog front-end calibration. Use Value: No-output-capacitor design simplifies layout in confined DIN-rail enclosure; ±0.2% tolerance meets ISA-S50.1 Class B accuracy spec. |
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/NOPB | ±0.5% initial tolerance (C-grade), same 1.225 V output and SOT-23 package | Lower accuracy acceptable in non-critical biasing or coarse calibration circuits | Select when cost sensitivity outweighs tight tolerance requirements; identical footprint and drive capability |
| REF3012AIDBZR | 1.2 V output, ±0.2% tolerance, but series topology with 50 μA quiescent current and 3.6 V max supply | Requires input voltage ≥ reference + dropout; unsuitable for shunt-configured low-voltage rails | Choose only if system architecture mandates series regulator topology and supply headroom permits |
Compared with LM4041CIM3-1.2/NOPB, the LM4041BIM3-1.2/NOPB delivers tighter initial accuracy for calibration-critical signal chains; versus REF3012AIDBZR, it offers true shunt operation with no minimum input voltage constraint-enabling direct use on 1.8 V or 2.5 V rails where series regulators cannot regulate.
Availability
LM4041BIM3-1.2/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 sourcing.
Supply support for LM4041BIM3-1.2/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 focus on reliability, performance, and broad portfolio coverage.
The LM4041-N family was designed for precision shunt reference applications demanding low power, small size, and robust temperature stability in industrial and automotive environments.
FAQ
What is the maximum operating current for LM4041BIM3-1.2/NOPB?
The LM4041BIM3-1.2/NOPB supports a maximum operating current of 12 mA. This upper limit ensures safe power dissipation within the SOT-23 package's 306 mW rating at 25°C ambient. Exceeding 12 mA risks thermal overstress and long-term reliability degradation. Designers must verify worst-case power (VR × IR) stays below derated limits across operating temperature.
Does LM4041BIM3-1.2/NOPB require an output capacitor for stability?
No, the LM4041BIM3-1.2/NOPB does not require an output capacitor. Its internal design provides inherent stability with any capacitive load, including direct connection to ADC input capacitors or long PCB traces. This eliminates BOM cost and layout complexity-confirmed in TI's datasheet Section 3 and Figure 8-1 typical application circuit.
What is the thermal hysteresis specification for LM4041BIM3-1.2/NOPB?
The LM4041BIM3-1.2/NOPB exhibits 0.08% thermal hysteresis, defined as the voltage difference measured at +25°C after cycling to −40°C versus +125°C. This low hysteresis ensures repeatable reference accuracy during thermal cycling in automotive and industrial environments where ambient swings occur repeatedly.
Can LM4041BIM3-1.2/NOPB be used in automotive applications?
Yes, LM4041BIM3-1.2/NOPB is AEC-Q100 Grade 3 qualified for automotive use, supporting −40°C to +85°C ambient operation. It appears in TI's LM4041-N-Q1 automotive-grade variant family and is validated for cabin sensors, body control modules, and infotainment subsystems-not for safety-critical powertrain or ADAS domains requiring Grade 1.
How does the LM4041BIM3-1.2/NOPB differ from the adjustable LM4041-N ADJ version?
The LM4041BIM3-1.2/NOPB is a fixed 1.225 V shunt reference with three terminals (cathode, anode, NC), while the ADJ version requires four connections (cathode, anode, FB, NC) and uses external resistors to set output from 1.24 V to 10 V. The B-grade fixed version offers tighter initial tolerance (±0.2%) than most ADJ variants and eliminates resistor matching errors in precision applications.
LM4041BIM3-1.2/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
LM4041BIM3-1.2/NOPB FAQ
1.How can I place an order for LM4041BIM3-1.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041BIM3-1.2/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 LM4041BIM3-1.2/NOPB reliable?
The price and inventory of LM4041BIM3-1.2/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041BIM3-1.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4041BIM3-1.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041BIM3-1.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041BIM3-1.2/NOPB?
LM4041BIM3-1.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041BIM3-1.2/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 LM4041BIM3-1.2/NOPB?
For technical support, including LM4041BIM3-1.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041BIM3-1.2/NOPB requirements.
6.How does Aetrix verify that LM4041BIM3-1.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4041BIM3-1.2/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 LM4041BIM3-1.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4041BIM3-1.2/NOPB?
All LM4041BIM3-1.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4041BIM3-1.2/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 LM4041BIM3-1.2/NOPB part is unused and in its original packaging.
Return procedure for LM4041BIM3-1.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041BIM3-1.2/NOPB Tags
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