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Texas Instruments LM4041AIM3-1.2
- Part No.:
- LM4041AIM3-1.2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041AIM3-1.2.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,592
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Product details
Overview
LM4041AIM3-1.2 from Texas Instruments is a precision 1.225 V shunt voltage reference in SOT-23 package, rated A-grade (±0.1% initial tolerance at 25°C), with 100 ppm/°C max temperature coefficient, 20 μVRMS wideband noise (10 Hz–10 kHz), and stable operation from 60 μA to 12 mA. It serves as a compact, low-drift reference for ADC/DAC biasing and sensor excitation in battery-powered instrumentation.
For engineers reviewing the LM4041AIM3-1.2 datasheet, LM4041AIM3-1.2 pinout, LM4041AIM3-1.2 application, or LM4041AIM3-1.2 equivalent, key selection criteria include industrial temperature range (−40°C to +85°C), no-output-capacitor requirement, reverse breakdown stability under capacitive loads, and compatibility with space-constrained PCB layouts using the 1.30 mm × 2.92 mm SOT-23 footprint.
Technical Context
The LM4041AIM3-1.2 uses bandgap-derived Zener-zap trimmed reverse breakdown architecture with curvature-corrected temperature drift compensation. Its three-terminal shunt topology requires only anode (ground), cathode (output/reference node), and no feedback pin - unlike adjustable variants - simplifying layout and eliminating external resistor networks.
It operates as a two-terminal device where cathode current sets output voltage via internal reference generation; dynamic impedance remains ≤1.5 Ω at 1 mA, enabling stable regulation even with varying load currents across its full 60 μA–12 mA operating range and under capacitive loading up to several nF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; fixed value - eliminates external resistor divider errors and layout sensitivity in precision references. |
| Initial Tolerance | ±0.1% at 25°C (A grade); ensures <±1.23 mV absolute error without calibration in production systems. |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +85°C; contributes <±0.105 mV drift across full industrial range. |
| Noise (10 Hz–10 kHz) | 20 μVRMS; supports high-resolution (≥16-bit) data acquisition without added filtering overhead. |
| Operating Current | 60 μA to 12 mA; enables ultra-low-power sensor nodes and robust performance in high-current DAC reference paths. |
| Dynamic Impedance | ≤1.5 Ω at 1 mA; maintains voltage stability during fast load transients in closed-loop analog circuits. |
| Long-Term Stability | 120 ppm over 1000 hours; predicts <±0.15 mV drift in 5-year field deployments. |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 1.30 mm × 2.92 mm body size, JEDEC standard footprint compatible with automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 2) | Ground reference terminal | Must be connected to system ground; serves as return path for shunt current and establishes cathode voltage relative to GND. |
| Cathode (Pin 1) | Output/reference node | Provides regulated 1.225 V when reverse-biased; sinks all operating current and interfaces directly to ADC REF+, op-amp inputs, or sensor bridges. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to anode per TI EMI guidance - not used for voltage setting or feedback. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct connection to high-impedance inputs (e.g., SAR ADC reference pins) without stability risk or board area penalty. |
| Tolerates capacitive loads | Stable with ≥1 nF load capacitance - supports filtering, noise reduction, and decoupling without phase-margin degradation. |
| Low quiescent current | 60 μA minimum operating current allows use in always-on, coin-cell-powered devices with multi-year battery life. |
| Automotive qualification option | AEC-Q100 Grade 1 support (−40°C to +125°C) available in same SOT-23 package - enables reuse in automotive subsystems without redesign. |
| High ESD immunity | ±2 kV HBM rating protects against handling damage during manual assembly and board-level integration. |
Applications
| Portable Energy Metering | Precision Sensor Signal Chain |
|---|---|
|
Use Scenario: Battery-powered smart meters measuring voltage, current, and power in residential/utility applications. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for 24-bit delta-sigma ADCs digitizing shunt-based current sensing and transformer-coupled voltage inputs. Use Value: ±0.1% initial accuracy and ≤100 ppm/°C drift ensure metering compliance with IEC 62053-21 Class 0.5 accuracy over temperature and lifetime. |
Use Scenario: Industrial pressure/temperature transmitters with 4–20 mA loop or digital output. IC Role / Device Role / Timing Role: Supplies excitation voltage to precision bridge sensors and reference voltage to instrumentation amplifiers and ADCs. Use Value: Low 20 μVRMS noise prevents signal-to-noise degradation in sub-μV-level sensor outputs, preserving measurement resolution. |
| Medical Wearable Biosensors | Automotive Cabin Control Unit |
|
Use Scenario: Compact ECG/PPG modules powered by rechargeable Li-ion cells with strict power budget constraints. IC Role / Device Role / Timing Role: Generates bias voltage for analog front-end op-amps and reference for low-power SAR ADC sampling bio-potential signals. Use Value: 60 μA minimum current enables continuous monitoring mode while maintaining <1 μA total system standby current. |
Use Scenario: HVAC control, ambient light sensing, and seat position feedback in passenger cabin ECUs. IC Role / Device Role / Timing Role: Supplies accurate reference to microcontroller ADCs monitoring thermistors, potentiometers, and Hall-effect sensors. Use Value: AEC-Q100 Grade 1 qualification and −40°C to +125°C extended range support reliable operation across vehicle thermal profiles without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3012AIDBZR | 1.2 V output, ±0.2% initial tolerance, 50 ppm/°C tempco, 35 μVRMS noise, SOT-23 package | Higher noise and looser tolerance reduce suitability for 16+ bit data acquisition but acceptable for 12-bit sensor monitoring | Select when lower cost outweighs need for <±0.1% accuracy and <25 μV noise in non-critical references |
| ADR3412ARJZ-R7 | 1.2 V output, ±0.1% initial tolerance, 30 ppm/°C tempco, 10 μVRMS noise, SOT-23 package | Lower noise and tighter tempco improve high-precision metrology, but higher 100 μA min current limits ultra-low-power use | Select when system prioritizes lowest possible drift/noise and can support ≥100 μA supply current |
Compared with LM4041AIM3-1.2, REF3012AIDBZR trades accuracy and noise for cost, while ADR3412ARJZ-R7 improves precision at the expense of minimum operating current - making LM4041AIM3-1.2 optimal for battery-sensitive, A-grade precision applications requiring 60 μA startup.
Availability
LM4041AIM3-1.2 is available at Aetrix Electronics and suitable for portable energy metering, precision sensor signal chains, medical wearable biosensors, and automotive cabin control units requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4041AIM3-1.2 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 series was developed to deliver micro-power, high-accuracy shunt references for space-constrained, battery-operated, and safety-critical systems - emphasizing stability, low noise, and qualification-ready variants.
FAQ
What is the output voltage tolerance of LM4041AIM3-1.2 at 25°C?
The LM4041AIM3-1.2 has an initial output voltage tolerance of ±0.1% at 25°C, corresponding to ±1.23 mV around its nominal 1.225 V output. This A-grade specification is 100% production tested and reflects the tightest tolerance option within the LM4041-N family for the 1.225 V fixed variant.
Does LM4041AIM3-1.2 require an external output capacitor for stability?
No, the LM4041AIM3-1.2 does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including direct connection to ADC reference inputs or op-amp feedback nodes - eliminating board area, BOM count, and layout sensitivity associated with external compensation.
What is the minimum operating current for LM4041AIM3-1.2?
The LM4041AIM3-1.2 specifies a minimum operating current of 60 μA at 25°C, with 65 μA maximum across the full industrial temperature range (−40°C to +85°C). This ultra-low current enables use in always-on, energy-harvesting, and coin-cell-powered applications where quiescent power is critical.
Can LM4041AIM3-1.2 be used in automotive applications?
Yes - while the base LM4041AIM3-1.2 is qualified for industrial temperature range, the pin-compatible LM4041QAIM3-1.2 variant is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and shares identical electrical specs. For automotive designs, LM4041QAIM3-1.2 is the recommended drop-in replacement with full automotive reliability validation.
What is the noise performance of LM4041AIM3-1.2 over 10 Hz to 10 kHz?
The LM4041AIM3-1.2 delivers 20 μVRMS wideband noise over the 10 Hz to 10 kHz frequency range at 100 μA operating current. This low-noise characteristic supports high-resolution data acquisition systems (e.g., 16-bit+ ADCs) without requiring additional post-regulation filtering that would increase complexity and power consumption.
LM4041AIM3-1.2 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:
- ±0.1%
- 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
LM4041AIM3-1.2 FAQ
1.How can I place an order for LM4041AIM3-1.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041AIM3-1.2 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 LM4041AIM3-1.2 reliable?
The price and inventory of LM4041AIM3-1.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041AIM3-1.2 is usually 5 days.
3.What payment methods are accepted for LM4041AIM3-1.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041AIM3-1.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041AIM3-1.2?
LM4041AIM3-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041AIM3-1.2 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 LM4041AIM3-1.2?
For technical support, including LM4041AIM3-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041AIM3-1.2 requirements.
6.How does Aetrix verify that LM4041AIM3-1.2 is sourced from the original manufacturer or authorized distributors?
All LM4041AIM3-1.2 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 LM4041AIM3-1.2 meets industry standards.
7.What is the process for return or replacement of LM4041AIM3-1.2?
All LM4041AIM3-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041AIM3-1.2, 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 LM4041AIM3-1.2 part is unused and in its original packaging.
Return procedure for LM4041AIM3-1.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041AIM3-1.2 Tags
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