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Texas Instruments LM4041BIM3X-1.2
- Part No.:
- LM4041BIM3X-1.2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041BIM3X-1.2.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,398
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Product details
Overview
LM4041BIM3X-1.2 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering 1.225 V nominal reverse breakdown voltage with ±0.2% initial tolerance (B-grade), 100 ppm/°C max temperature coefficient, and 20 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 12 mA and is used in battery-powered instrumentation and data acquisition systems requiring stable low-current biasing.
For engineers reviewing the LM4041BIM3X-1.2 datasheet, LM4041BIM3X-1.2 pinout, LM4041BIM3X-1.2 application, or LM4041BIM3X-1.2 equivalent, key selection criteria include industrial temperature range (−40°C to +85°C), no-output-capacitor stability, low dynamic impedance (≤1.5 Ω), thermal hysteresis (0.08%), and compatibility with capacitive loads.
Technical Context
The LM4041BIM3X-1.2 uses bandgap-based curvature-corrected Zener-zap trimming to achieve tight initial accuracy and low drift across temperature. Its two-terminal shunt architecture requires only anode and cathode connections, eliminating feedback network complexity while maintaining regulation under varying load currents.
It achieves stability without external capacitance by integrating low dynamic impedance (0.5–1.5 Ω) and optimized internal compensation, enabling direct use with ADC reference inputs, DAC biasing, and sensor excitation circuits where layout space and BOM count are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; ±0.2% initial tolerance at 25°C ensures high-accuracy system-level calibration without trimming. |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +85°C; enables <±1.2 mV drift in industrial environments for stable 12-bit+ measurement systems. |
| Operating Current | 60 μA min / 12 mA max; supports ultra-low-power wake-up circuits and high-current precision references in same design. |
| Noise (10 Hz–10 kHz) | 20 μVrms; minimizes added uncertainty in high-resolution analog front-ends (e.g., 16-bit SAR ADCs). |
| Dynamic Impedance | 0.5–1.5 Ω at 1 mA; maintains output voltage stability during fast load transients in multiplexed sensor arrays. |
| Long-Term Stability | 120 ppm over 1000 hrs; reduces recalibration frequency in field-deployed energy meters and process controllers. |
| Thermal Hysteresis | 0.08%; prevents voltage offset shifts after thermal cycling in automotive cabin modules and outdoor IoT nodes. |
Pinout & Package
SOT-23-3 package (1.30 mm × 2.92 mm body size), surface-mount, JEDEC-compliant footprint with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 2) | Reference ground node | Connected to system GND; establishes common reference potential for shunt operation and defines current return path. |
| Cathode (Pin 1) | Shunt output terminal | Provides regulated 1.225 V at cathode-to-anode; sinks all operating current and supplies reference voltage to external circuitry. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must be left floating or tied to anode per datasheet-no routing or PCB trace required. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct connection to ADC reference pins or op-amp inputs without stability-compromising bypass caps-reduces component count and board area. |
| Tolerates capacitive loads | Stable with ≥0 pF load capacitance; eliminates need for series isolation resistors when driving sampling capacitors or long traces. |
| Low quiescent current | 60 μA minimum operating current allows integration into always-on battery monitors and low-power wake-up supervisors. |
| Industrial temperature range | Specified from −40°C to +85°C; qualified for use in factory automation PLCs, HVAC controllers, and industrial data loggers. |
| Low thermal hysteresis | 0.08% voltage shift after −40°C/+125°C thermal cycling; ensures repeatable performance in thermally cycled embedded systems. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter using 16-bit sigma-delta ADC with ratiometric sensing. IC Role / Device Role / Timing Role: Shunt reference providing precise 1.225 V for ADC VREF input and sensor excitation. Use Value: Enables ±0.01% full-scale accuracy over temperature without calibration due to 100 ppm/°C TC and 0.08% hysteresis. |
Use Scenario: Modular DAQ module acquiring 8-channel thermocouple signals with cold-junction compensation. IC Role / Device Role / Timing Role: Stable bias source for precision op-amps and reference for cold-junction ICs. Use Value: 20 μVrms noise and 1.5 Ω dynamic impedance prevent added quantization error and maintain SNR > 90 dB. |
| Energy Management | Automotive Body Electronics |
Use Scenario: Smart electricity meter measuring voltage/current with metrology-grade AFE. IC Role / Device Role / Timing Role: Primary shunt reference for voltage channel ADC and auxiliary supply monitoring. Use Value: 120 ppm long-term stability reduces annual recalibration needs; 60 μA min current supports ultra-low-power sleep modes. |
Use Scenario: In-cabin ambient light and humidity sensor node in automotive infotainment control unit. IC Role / Device Role / Timing Role: Reference for analog signal conditioning of photodiode and capacitive humidity outputs. Use Value: Qualified for −40°C to +85°C operation and immune to ESD (±2 kV HBM) ensures reliability in harsh vehicle environments. |
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 | ±0.5% initial tolerance (C-grade), same 100 ppm/°C TC and 20 μVrms noise | Lower accuracy grade suitable for cost-sensitive industrial sensors where ±0.5% system tolerance is acceptable | Select when B-grade accuracy is unnecessary and BOM cost reduction is prioritized over calibration headroom |
| TLVH431ACDBVR | Adjustable 1.24–18 V output; 0.5% initial tolerance; higher 30 μVrms noise; 2.5 Ω dynamic impedance | Requires external resistor divider; less suitable for fixed-voltage, low-noise, or space-constrained designs | Choose only if adjustable output or higher voltage (>1.24 V) is required-otherwise LM4041BIM3X-1.2 offers superior noise and stability |
Compared with LM4041CIM3X-1.2, the LM4041BIM3X-1.2 provides tighter initial tolerance for reduced calibration effort; compared with TLVH431ACDBVR, it delivers lower noise, lower impedance, and fixed-voltage simplicity-making it optimal for compact, high-precision, low-power shunt reference roles.
Availability
LM4041BIM3X-1.2 is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management applications requiring stable component supply, guaranteed long-term availability, and traceable sourcing for industrial OEM programs.
Supply support for LM4041BIM3X-1.2 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-qualified components.
The LM4041-N family was engineered for space-constrained, micropower applications demanding high initial accuracy, low drift, and robust capacitive-load stability-targeting instrumentation, portable test equipment, and automotive subsystems.
FAQ
What is the operating temperature range for LM4041BIM3X-1.2?
The LM4041BIM3X-1.2 is specified for the industrial temperature range of −40°C to +85°C. This range is validated per the LM4041-N datasheet (SNOS641G), and the device is not rated for extended (−40°C to +125°C) or automotive (Grade 1) operation unless marked as LM4041BQIM3X-1.2. Always verify ambient and junction temperature limits in your final layout.
Does LM4041BIM3X-1.2 require an external capacitor for stability?
No, the LM4041BIM3X-1.2 does not require an external output capacitor. Its internal design ensures stability with any capacitive load-including zero capacitance-making it ideal for direct connection to ADC reference inputs or op-amp feedback networks without added components or layout constraints.
What is the minimum cathode current needed for regulation in LM4041BIM3X-1.2?
The LM4041BIM3X-1.2 requires a minimum cathode current of 60 μA at 25°C to maintain regulation. At full temperature range (−40°C to +85°C), the minimum increases to 65 μA. Below this threshold, the device exits regulation and output voltage drops below 1.225 V.
Can LM4041BIM3X-1.2 drive capacitive loads directly?
Yes, the LM4041BIM3X-1.2 is explicitly designed to tolerate capacitive loads without oscillation or instability. The datasheet confirms stability "with any capacitive load", including typical ADC sampling capacitors (e.g., 10–20 pF) and longer PCB traces-no series resistance or isolation is needed.
How does the LM4041BIM3X-1.2 compare to the LM4041AIM3X-1.2?
The LM4041BIM3X-1.2 has ±0.2% initial tolerance versus ±0.1% for the A-grade LM4041AIM3X-1.2. Both share identical temperature coefficient (100 ppm/°C), noise (20 μVrms), dynamic impedance, and package. Choose LM4041BIM3X-1.2 when ±0.2% meets system accuracy requirements and cost optimization is desired.
LM4041BIM3X-1.2 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:
- Obsolete
- 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 FAQ
1.How can I place an order for LM4041BIM3X-1.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041BIM3X-1.2 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 reliable?
The price and inventory of LM4041BIM3X-1.2 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 is usually 5 days.
3.What payment methods are accepted for LM4041BIM3X-1.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041BIM3X-1.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041BIM3X-1.2?
LM4041BIM3X-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041BIM3X-1.2 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?
For technical support, including LM4041BIM3X-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041BIM3X-1.2 requirements.
6.How does Aetrix verify that LM4041BIM3X-1.2 is sourced from the original manufacturer or authorized distributors?
All LM4041BIM3X-1.2 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 meets industry standards.
7.What is the process for return or replacement of LM4041BIM3X-1.2?
All LM4041BIM3X-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041BIM3X-1.2, 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 part is unused and in its original packaging.
Return procedure for LM4041BIM3X-1.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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