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Texas Instruments LM4041DEM3X-1.2/NOPB
- Part No.:
- LM4041DEM3X-1.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DEM3X-1.2/NOPB.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,741
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Product details
Overview
LM4041DEM3X-1.2/NOPB from Texas Instruments is a precision 1.225 V shunt voltage reference in SOT-23 package, rated for extended temperature operation (−40°C to +125°C), with ±0.5% 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 reference in low-power analog signal chains for battery-powered instrumentation.
For engineers reviewing the LM4041DEM3X-1.2/NOPB datasheet, LM4041DEM3X-1.2/NOPB pinout, LM4041DEM3X-1.2/NOPB application, or LM4041DEM3X-1.2/NOPB equivalent, key selection criteria include guaranteed operation down to 60 μA, no output capacitor requirement, capacitive load tolerance, reverse breakdown voltage stability across −40°C to +125°C, and AEC-Q100 Grade 1 qualification for automotive use.
Technical Context
The LM4041DEM3X-1.2/NOPB implements a bandgap-based shunt reference architecture with curvature-corrected temperature drift compensation. Its design eliminates external stabilization capacitors while maintaining stability under capacitive loads up to 10 nF, enabling direct integration into compact, space-constrained PCB layouts.
It operates as a two-terminal device: cathode supplies regulated voltage and shunt current path, anode connects to system ground. The fixed 1.225 V reverse breakdown voltage is trimmed via Zener-zap during wafer sort, ensuring ±0.5% accuracy at 25°C for the 'E' grade, with performance validated over full industrial and extended temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal reverse breakdown voltage - provides precise, stable reference point for ADCs, DACs, and comparators. |
| Initial Tolerance | ±0.5% at 25°C (E-grade) - translates to ±6.1 mV absolute error, suitable for 12-bit precision systems. |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +125°C - contributes ≤12.4 mV drift across full range, critical for automotive and industrial environments. |
| Operating Current | 60 μA to 12 mA - enables ultra-low-power operation in battery systems while supporting higher-current sensing circuits. |
| Output Noise | 20 μVRMS (10 Hz–10 kHz) - minimizes added noise in high-resolution data acquisition front-ends. |
| Dynamic Impedance | ≤1.5 Ω at 1 mA - ensures minimal voltage shift under varying load currents, improving regulation accuracy. |
| Long-Term Stability | 120 ppm after 1000 hours - supports reliable calibration retention in metering and test equipment. |
Pinout & Package
SOT-23 (DBZ) 3-pin surface-mount package, 1.30 mm × 2.92 mm body size, with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink / output node | Provides regulated 1.225 V reference voltage; sinks all operating current; must be connected to load and current-limiting resistor. |
| Anode (Pin 2) | Ground reference terminal | Internally tied to substrate ground; must be connected to system ground plane for accurate voltage regulation and thermal stability. |
| NC (Pin 3) | No-connect terminal | Not bonded internally; must float or connect to anode per TI recommendation for EMI-sensitive applications. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables immediate power-up stability without external components, reducing BOM count and board area in portable designs. |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance - simplifies filtering and decoupling in mixed-signal systems without risk of oscillation. |
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient temperatures −40°C to +125°C - supports engine control, ADAS sensors, and infotainment power rails. |
| Low 60 μA minimum operating current | Extends battery life in always-on monitoring systems such as smart meters and IoT edge nodes. |
| Reverse breakdown voltage trim | Zener-zap wafer-level trimming achieves ±0.5% initial accuracy - reduces post-manufacturing calibration effort in production test. |
Applications
| Battery-Powered Equipment | Data-Acquisition Systems |
|---|---|
Use Scenario: Precision voltage reference for 12-bit SAR ADCs in handheld multimeters and portable gas analyzers. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225 V reference voltage to ADC VREF input, rejecting supply ripple and temperature drift. Use Value: Enables <1 LSB INL error over −20°C to +70°C without recalibration, extending field service intervals. | Use Scenario: Reference source for multi-channel sensor signal conditioning in environmental monitoring stations. IC Role / Device Role / Timing Role: Two-terminal shunt reference supplying common reference to multiple op-amp gain stages and ADC inputs. Use Value: Eliminates need for separate reference buffers, reducing component count and thermal mismatch between channels. |
| Automotive Electronics | Energy Management/Metering |
Use Scenario: Calibration reference for battery cell voltage monitoring in 12 V starter-battery health modules. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 shunt reference operating directly from vehicle battery rail (9–16 V) with series resistor. Use Value: Maintains ±0.8% total error over −40°C to +125°C, meeting ISO 16750-4 transient and thermal requirements. | Use Scenario: Reference for anti-tampering voltage supervision and revenue-grade kWh measurement ICs in smart electricity meters. IC Role / Device Role / Timing Role: Primary shunt reference for metrology ASICs requiring long-term stability and low drift. Use Value: 120 ppm 1000-hour stability ensures <0.01% energy measurement drift over 10-year product lifetime. |
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 | Same SOT-23 package, ±0.5% tolerance, but rated only for −40°C to +85°C industrial range. | Lacks extended temperature validation; unsuitable for under-hood automotive or high-temp industrial enclosures. | Select when cost sensitivity outweighs extended temperature needs and ambient stays below 85°C. |
| MAX6002EUR+T | 1.25 V output, ±0.2% initial accuracy, 75 ppm/°C tempco, SC70-3 package, 45 μA min current. | Higher accuracy but lower temperature rating (−40°C to +85°C); no AEC-Q100 qualification. | Prefer for lab-grade instrumentation where ultimate initial accuracy matters more than automotive qualification. |
Compared with LM4041CIM3X-1.2/NOPB, the LM4041DEM3X-1.2/NOPB adds 40°C higher max operating temperature and AEC-Q100 Grade 1 compliance; compared with MAX6002EUR+T, it trades 0.05 V output offset and slightly higher tempco for guaranteed automotive reliability and wider thermal margin.
Availability
LM4041DEM3X-1.2/NOPB is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor modules, and smart energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041DEM3X-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 specializing in analog, embedded processing, and connectivity technologies, with deep expertise in precision analog ICs and automotive-qualified components.
The LM4041-N series was designed specifically for space-constrained, low-power applications needing high-accuracy voltage references - especially in automotive, industrial, and portable instrumentation where reliability across extreme temperatures is mandatory.
FAQ
What is the maximum operating temperature for LM4041DEM3X-1.2/NOPB?
The LM4041DEM3X-1.2/NOPB is rated for operation from −40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements. This extended temperature range is confirmed in the device's Electrical Characteristics table (Section 5.7) and qualifies it for under-hood automotive and industrial control applications where thermal stress is significant. The LM4041DEM3X-1.2/NOPB maintains its ±0.5% initial tolerance and 100 ppm/°C tempco specification across this full range.
Does LM4041DEM3X-1.2/NOPB require an external capacitor for stability?
No, the LM4041DEM3X-1.2/NOPB does not require an external output capacitor for stability. Its internal design provides inherent phase margin across its full operating current range (60 μA to 12 mA) and remains stable with capacitive loads up to 10 nF. This eliminates the need for external compensation components, simplifying layout and reducing bill-of-materials cost in space-constrained designs using the LM4041DEM3X-1.2/NOPB.
What is the minimum cathode current needed for LM4041DEM3X-1.2/NOPB to regulate properly?
The LM4041DEM3X-1.2/NOPB requires a minimum cathode current of 60 μA at 25°C to maintain regulation within specification. At full temperature range (−40°C to +125°C), the minimum increases to 68 μA. This low quiescent current enables use in ultra-low-power applications such as battery-backed real-time clocks and wake-on-event sensor nodes where the LM4041DEM3X-1.2/NOPB delivers stable 1.225 V reference with minimal drain.
Is LM4041DEM3X-1.2/NOPB pin-compatible with other LM4041 variants in SOT-23?
Yes, the LM4041DEM3X-1.2/NOPB uses the standard DBZ (SOT-23) 3-pin footprint shared across all LM4041-N fixed-voltage variants, including LM4041AIM3X-1.2/NOPB and LM4041CIM3X-1.2/NOPB. Pin 1 is Cathode, Pin 2 is Anode, and Pin 3 is NC - identical pinout and mechanical dimensions ensure drop-in replacement capability within the same grade family when thermal and accuracy requirements align.
How does the LM4041DEM3X-1.2/NOPB achieve its 100 ppm/°C temperature coefficient?
The LM4041DEM3X-1.2/NOPB achieves its ≤100 ppm/°C temperature coefficient through bandgap reference architecture with curvature correction circuitry that compensates for second-order thermal effects in the silicon junction. This design is validated across −40°C to +125°C in the LM4041DEM3X-1.2/NOPB's extended temperature electrical characteristics (Section 5.7), ensuring predictable, monotonic drift behavior critical for automotive and industrial calibration integrity.
LM4041DEM3X-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:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041DEM3X-1.2/NOPB FAQ
1.How can I place an order for LM4041DEM3X-1.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DEM3X-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 LM4041DEM3X-1.2/NOPB reliable?
The price and inventory of LM4041DEM3X-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 LM4041DEM3X-1.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4041DEM3X-1.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DEM3X-1.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041DEM3X-1.2/NOPB?
LM4041DEM3X-1.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DEM3X-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 LM4041DEM3X-1.2/NOPB?
For technical support, including LM4041DEM3X-1.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DEM3X-1.2/NOPB requirements.
6.How does Aetrix verify that LM4041DEM3X-1.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4041DEM3X-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 LM4041DEM3X-1.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4041DEM3X-1.2/NOPB?
All LM4041DEM3X-1.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DEM3X-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 LM4041DEM3X-1.2/NOPB part is unused and in its original packaging.
Return procedure for LM4041DEM3X-1.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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