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Texas Instruments LM4041EIM3X-1.2
- Part No.:
- LM4041EIM3X-1.2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041EIM3X-1.2.pdf
- Description:
- IC VREF SHUNT 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,581
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Product details
Overview
LM4041EIM3X-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 ±25 mV (±2.0%) initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and 20 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 12 mA and supports stable regulation without output capacitor across capacitive loads - ideal for battery-powered instrumentation and automotive sensor signal conditioning.
For engineers reviewing the LM4041EIM3X-1.2 datasheet, LM4041EIM3X-1.2 pinout, LM4041EIM3X-1.2 application, or LM4041EIM3X-1.2 equivalent, key selection criteria include its extended temperature range (−40°C to +125°C), low dynamic impedance (≤2 Ω), thermal hysteresis of 0.08%, and qualification per AEC-Q100 Grade 1 - critical for high-reliability embedded power monitoring and ADC reference design.
Technical Context
The LM4041EIM3X-1.2 uses Zener-zap trimming during wafer sort to achieve ±2.0% initial accuracy and integrates bandgap curvature correction for stable voltage over −40°C to +125°C. Its shunt architecture requires an external current source and regulates by sinking excess current through the cathode terminal.
It features no output capacitor requirement, tolerates unlimited capacitive loading, and maintains <2 mV load regulation across 1 mA to 12 mA operating current - enabled by low 2 Ω typical dynamic impedance and 60 μA minimum operating current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; ±25 mV (±2.0%) initial tolerance at 25°C - sets precise bias point for analog front-ends |
| Tempco | ≤100 ppm/°C max - ensures ≤±12.5 mV drift over −40°C to +125°C ambient |
| Operating Current | 60 μA min to 12 mA max - enables ultra-low-power operation in wake-on-event systems |
| Noise (10 Hz–10 kHz) | 20 μVrms - suitable for 12-bit+ ADC references without additional filtering |
| Dynamic Impedance | ≤2 Ω at 1 mA - provides tight load regulation (<2 mV change) under varying sink current |
| Long-Term Stability | 120 ppm after 1000 hrs - supports >10-year calibration retention in energy metering |
| Thermal Hysteresis | 0.08% - limits voltage shift to <1 mV after thermal cycling between −40°C and +125°C |
Pinout & Package
SOT-23-3 package (1.30 mm × 2.92 mm body size), surface-mount, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 2) | Reference ground node | Connected to system ground; defines 0 V reference for cathode output |
| Cathode (Pin 1) | Shunt output terminal | Sinks regulated current; voltage at this pin = 1.225 V when biased above minimum current |
| NC (Pin 3) | No-connect terminal | Must be left floating or tied to anode; no internal connection - avoids parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient range (−40°C to +125°C) - supports engine control and ADAS sensor modules |
| No output capacitor required | Stable with any capacitive load - eliminates BOM cost and PCB area for decoupling cap in space-constrained designs |
| Low 60 μA minimum operating current | Enables use in always-on, low-quiescent subsystems such as battery fuel gauges and IoT wake-up circuits |
| 20 μVrms wideband noise | Meets SNR requirements for 12-bit SAR ADCs without post-regulation filtering |
| 100 ppm/°C max tempco | Guarantees <±15 mV total drift over full industrial range - sufficient for precision current sensing |
Applications
| Battery-Powered Instrumentation | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Portable multimeter front-end requiring stable 1.225 V reference for 16-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Shunt voltage reference providing precision bias for analog input scaling and offset calibration. Use Value: 20 μVrms noise and 100 ppm/°C tempco ensure <0.01% measurement error across −10°C to +50°C handheld operation. |
Use Scenario: Engine coolant temperature sensor interface in ECU with 12-bit ADC and CAN reporting. IC Role / Device Role / Timing Role: Precision shunt reference for ratiometric RTD-to-voltage conversion circuit. Use Value: AEC-Q100 Grade 1 rating and 120 ppm long-term stability enable 15-year field reliability without recalibration. |
| Energy Metering Reference | Industrial Process Controller ADC Bias |
Use Scenario: Class 0.5 electricity meter using shunt-based current sensing and 24-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Primary voltage reference for metrology-grade analog signal chain. Use Value: 0.08% thermal hysteresis and 120 ppm 1000-hr drift meet IEC 62053-21 long-term accuracy requirements. |
Use Scenario: 4–20 mA loop-powered transmitter with integrated microcontroller and precision DAC. IC Role / Device Role / Timing Role: Stable 1.225 V reference for DAC output scaling and sensor excitation. Use Value: 60 μA min operating current allows direct bias from loop supply - no auxiliary LDO needed. |
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 (±6 mV), same 100 ppm/°C tempco and SOT-23-3 package | Higher accuracy required for 14-bit data acquisition where ±25 mV error is unacceptable | Select when tighter initial accuracy justifies higher unit cost and qualification retest for automotive Grade 1 |
| TLVH431ACDBVR | Adjustable 1.24–18 V output; 0.5% initial tolerance; 30 ppm/°C tempco; SOT-23-5 package | Requires external resistor divider; better tempco but larger footprint and higher quiescent current (80 μA min) | Choose for programmable reference needs or when lower tempco outweighs fixed-voltage simplicity and smaller size |
Compared with LM4041CIM3X-1.2, the LM4041EIM3X-1.2 trades ±2.0% initial accuracy for lower cost and identical thermal performance; versus TLVH431ACDBVR, it offers smaller footprint and simpler layout but lacks adjustability - making it optimal for cost-sensitive, space-constrained, fixed-reference designs in harsh environments.
Availability
LM4041EIM3X-1.2 is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor interfaces, and energy metering applications requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LM4041EIM3X-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 voltage references and automotive-qualified components.
The LM4041-N series was designed for space-critical, micropower shunt reference applications demanding high accuracy, low noise, and robust operation across industrial and automotive temperature ranges - particularly where capacitor-free stability and small SOT-23 packaging are essential.
FAQ
What is the maximum operating temperature range for the LM4041EIM3X-1.2?
The LM4041EIM3X-1.2 is rated for −40°C to +125°C ambient operation and qualified per AEC-Q100 Grade 1. This extended temperature range is confirmed in Section 6.7 of the SNOS641G datasheet, where electrical characteristics are specified across TA = −40°C to +125°C, making LM4041EIM3X-1.2 suitable for under-hood automotive and industrial control applications.
Does the LM4041EIM3X-1.2 require an external output capacitor?
No, the LM4041EIM3X-1.2 does not require an external output capacitor. Its internal design ensures stability with any capacitive load, as explicitly stated in the "Features" section and verified in Section 9.1 of the datasheet. This eliminates BOM cost and PCB area typically needed for decoupling - a key advantage in ultra-compact designs using LM4041EIM3X-1.2.
What is the minimum cathode current needed for regulation in the LM4041EIM3X-1.2?
The LM4041EIM3X-1.2 requires a minimum cathode current of 60 μA at 25°C to maintain regulation, rising to 68 μA at −40°C and 73 μA at +125°C per Section 6.7. Below this threshold, the device exits regulation and output voltage drops - critical for low-power sleep-mode design where LM4041EIM3X-1.2 must remain active.
How does the LM4041EIM3X-1.2 compare to the LM4041AIM3X-1.2 in accuracy?
The LM4041EIM3X-1.2 has ±2.0% initial tolerance (±25 mV), while the LM4041AIM3X-1.2 offers ±0.1% (±1.2 mV). Both share identical 100 ppm/°C max tempco, 20 μVrms noise, and SOT-23-3 packaging. The choice depends on system-level accuracy budget: LM4041EIM3X-1.2 targets cost-sensitive applications where ±25 mV is acceptable, whereas LM4041AIM3X-1.2 serves metrology-grade designs.
Is the LM4041EIM3X-1.2 pin-compatible with other LM4041 variants in SOT-23-3?
Yes, all LM4041-xIM3x variants (including LM4041EIM3X-1.2, LM4041AIM3X-1.2, LM4041CIM3X-1.2) share identical SOT-23-3 pinout: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC. This allows drop-in replacement across grades without PCB redesign - confirmed in the "Pin Configuration and Functions" section (page 5) of the LM4041-N datasheet.
LM4041EIM3X-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:
- ±2%
- Temperature Coefficient:
- 150ppm/°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
LM4041EIM3X-1.2 FAQ
1.How can I place an order for LM4041EIM3X-1.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041EIM3X-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 LM4041EIM3X-1.2 reliable?
The price and inventory of LM4041EIM3X-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 LM4041EIM3X-1.2 is usually 5 days.
3.What payment methods are accepted for LM4041EIM3X-1.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041EIM3X-1.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041EIM3X-1.2?
LM4041EIM3X-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041EIM3X-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 LM4041EIM3X-1.2?
For technical support, including LM4041EIM3X-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041EIM3X-1.2 requirements.
6.How does Aetrix verify that LM4041EIM3X-1.2 is sourced from the original manufacturer or authorized distributors?
All LM4041EIM3X-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 LM4041EIM3X-1.2 meets industry standards.
7.What is the process for return or replacement of LM4041EIM3X-1.2?
All LM4041EIM3X-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041EIM3X-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 LM4041EIM3X-1.2 part is unused and in its original packaging.
Return procedure for LM4041EIM3X-1.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041EIM3X-1.2 Tags
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