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Texas Instruments LM4041DEM3-1.2/NOPB
- Part No.:
- LM4041DEM3-1.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DEM3-1.2/NOPB.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,483
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Product details
Overview
LM4041DEM3-1.2/NOPB from Texas Instruments is a precision 1.225 V shunt voltage reference in SOT-23-3 package, rated for extended temperature operation (−40°C to +125°C), with ±0.5% initial tolerance (C grade), 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-power reference in battery-powered sensor signal chains and automotive data-acquisition systems.
For engineers reviewing the LM4041DEM3-1.2/NOPB datasheet, LM4041DEM3-1.2/NOPB pinout, LM4041DEM3-1.2/NOPB application, or LM4041DEM3-1.2/NOPB equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade thermal performance, and real-world design context for high-accuracy analog subsystems requiring minimal board space and no external capacitor.
Technical Context
The LM4041DEM3-1.2/NOPB implements a bandgap-based shunt architecture with curvature-corrected temperature drift compensation, enabling stable 1.225 V output across −40°C to +125°C. Its dynamic impedance is ≤1.5 Ω at 1 mA, supporting tight regulation under varying load currents without external stabilization capacitance.
It operates as a two-terminal device: cathode supplies regulated voltage and shunt current path, while anode connects to system ground. The third pin (NC) must float or tie to anode per TI's EMI mitigation guidance-no feedback loop or adjustment is used in the fixed 1.225 V variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; enables direct biasing of precision ADC references and op-amp input stages without scaling resistors |
| Initial Tolerance | ±6 mV (±0.5%) at 25°C; supports 12-bit+ measurement accuracy without calibration in industrial and automotive applications |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +125°C; contributes ≤±12.25 mV drift across full range, critical for unheated outdoor sensors |
| Noise (10 Hz–10 kHz) | 20 μVRMS; adds <0.002% RMS error to 1 V full-scale measurements, suitable for 16-bit SAR ADC front-ends |
| Operating Current | 60 μA min / 12 mA max; allows ultra-low-power wake-up sensing (e.g., 10-year coin-cell life) and robust drive into capacitive loads |
| Dynamic Impedance | ≤1.5 Ω at 1 mA; ensures <1.5 mV output shift per 1 mA load change, simplifying current-source design |
| Long-Term Stability | 120 ppm after 1000 hrs; corresponds to ~0.15 mV drift over 1 year, acceptable for metering and calibration equipment |
Pinout & Package
SOT-23-3 package (1.30 mm × 2.92 mm body size), surface-mount, JEDEC MO-178 compatible. Pin 1 = Cathode (output/shunt node), Pin 2 = Anode (ground), Pin 3 = NC (no connect; must float or connect to anode per TI EMI guidance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Cathode) | Shunt output node | Provides 1.225 V reference voltage and sinks all operating current; connects to top of resistor divider or ADC REF+ |
| Pin 2 (Anode) | Ground reference | System ground return path; must be low-impedance to maintain accuracy under dynamic load |
| Pin 3 (NC) | No-connect terminal | Not internally connected; TI recommends floating or tying to Pin 2 in high-EMI environments to reduce noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables single-component reference placement in space-constrained modules (e.g., wearables, ECUs) without stability risk |
| Tolerates capacitive loads | Stable with >1 μF ceramic output capacitance-supports filtering in noisy power domains without oscillation |
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient temperatures (−40°C to +125°C), meeting functional safety readiness for ASIL-B systems |
| Low 60 μA minimum current | Permits use with high-value bias resistors (e.g., 200 kΩ from 12 V), extending battery life in always-on monitoring nodes |
| 20 μVRMS low-noise output | Meets noise floor requirements for 16-bit delta-sigma ADCs in precision energy metering and strain-gauge interfaces |
Applications
| Battery-Powered Sensor Node | Automotive Cabin Temperature Monitor |
|---|---|
Use Scenario: Low-power IoT sensor node powered by CR2032 coin cell, measuring thermistor voltage with 12-bit ADC. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for ADC conversion, replacing larger 3-pin series references. Use Value: Enables 10-year battery life via 60 μA minimum current and eliminates external capacitor, reducing BOM count by one component. | Use Scenario: Cabin air temperature sensing module in HVAC control unit, operating across −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Supplies precision reference to microcontroller's internal ADC for calibrated temperature reporting. Use Value: AEC-Q100 Grade 1 qualification ensures reliability at +125°C junction temperature; 100 ppm/°C TC avoids recalibration across vehicle lifetime. |
| Industrial Process Transmitter | Smart Energy Meter Reference |
Use Scenario: 4–20 mA loop-powered pressure transmitter with HART modulation, housed in explosion-proof enclosure. IC Role / Device Role / Timing Role: Shunt reference for DAC output stage and sensor excitation circuitry. Use Value: Stable 1.225 V output under 12 mA max current enables accurate 16-bit DAC linearity; SOT-23 footprint fits tight PCB layouts. | Use Scenario: Polyphase electricity meter requiring metrology-grade voltage reference for 24-bit sigma-delta ADCs. IC Role / Device Role / Timing Role: Primary reference source for analog front-end, directly connected to ADC REF+ pin. Use Value: 20 μVRMS noise and 120 ppm long-term stability meet IEC 62053-21 Class 0.2 accuracy requirements without trimming. |
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 | Same 1.225 V output and SOT-23-3 package, but rated for industrial temp range (−40°C to +85°C) only | Not qualified for extended-temperature automotive or industrial control cabinet deployments above 85°C ambient | Select when cost sensitivity outweighs extended temperature need and ambient stays ≤85°C |
| MAX6008AEUR+T | 1.25 V output, ±0.2% initial accuracy, 75 ppm/°C TC, SC70-3 package, 10 μA min current | Lower quiescent current suits ultra-low-power designs, but 1.25 V output requires circuit re-biasing; not AEC-Q100 qualified | Choose for sub-10 μA systems where 1.25 V is acceptable and automotive qualification is unnecessary |
Compared with LM4041CIM3-1.2/NOPB, the LM4041DEM3-1.2/NOPB trades slightly higher initial tolerance (±0.5% vs ±0.2%) for guaranteed operation up to +125°C ambient-critical for engine bay or solar inverter applications. Versus MAX6008AEUR+T, it offers automotive qualification and tighter noise performance (20 vs 30 μVRMS) at the expense of minimum current (60 vs 10 μA).
Availability
LM4041DEM3-1.2/NOPB is available at Aetrix Electronics and suitable for battery-powered equipment, automotive electronics, and industrial process transmitters requiring stable component supply with guaranteed long-term availability and automotive-grade traceability.
Supply support for LM4041DEM3-1.2/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 deep expertise in precision analog ICs and automotive-qualified components.
The LM4041-N family was designed specifically for space-constrained, high-accuracy reference needs in automotive, industrial, and portable instrumentation-emphasizing zero-capacitor operation, wide current range, and AEC-Q100 compliance.
FAQ
What is the maximum operating temperature for LM4041DEM3-1.2/NOPB?
The LM4041DEM3-1.2/NOPB is qualified for extended temperature operation from −40°C to +125°C ambient, meeting AEC-Q100 Grade 1 requirements. Its junction temperature must remain ≤125°C; derating applies above 25°C ambient per its 291.9°C/W θJA (SOT-23). This makes LM4041DEM3-1.2/NOPB suitable for under-hood automotive and industrial control cabinet applications where ambient exceeds 85°C.
Does LM4041DEM3-1.2/NOPB require an external capacitor for stability?
No, LM4041DEM3-1.2/NOPB does not require an external output capacitor for stability. Its internal design provides inherent phase margin across its full 60 μA–12 mA operating current range and tolerates >1 μF capacitive loads without oscillation. This eliminates a common BOM item and simplifies layout-especially valuable in ultra-compact designs like wearable sensors or automotive ECUs where board space is constrained.
What is the pin configuration of LM4041DEM3-1.2/NOPB in the SOT-23-3 package?
The LM4041DEM3-1.2/NOPB uses standard SOT-23-3 pinout: Pin 1 is Cathode (1.225 V output/shunt node), Pin 2 is Anode (ground), and Pin 3 is NC (no connect). TI specifies Pin 3 must either float or connect to Pin 2 in EMI-sensitive environments. This configuration is identical across all LM4041-N 1.2 V variants in DBZ (SOT-23) packaging, including LM4041DEM3-1.2/NOPB.
How does the 100 ppm/°C temperature coefficient of LM4041DEM3-1.2/NOPB impact system accuracy?
The LM4041DEM3-1.2/NOPB's max 100 ppm/°C temperature coefficient means its output voltage can drift up to ±12.25 mV over the full −40°C to +125°C range (165°C ΔT × 1.225 V × 100 ppm/°C). In a 12-bit system with 3.3 V full scale, this represents ~15 LSB error-acceptable for many industrial sensors but may require software compensation in metrology-grade applications. Its curvature-compensated bandgap design minimizes nonlinearity within this bound.
Is LM4041DEM3-1.2/NOPB AEC-Q100 qualified, and what grade does it meet?
Yes, LM4041DEM3-1.2/NOPB is AEC-Q100 qualified and meets Grade 1 requirements (−40°C to +125°C ambient). This qualification covers stress testing for temperature cycling, humidity, ESD, and mechanical shock-validating its suitability for automotive powertrain, chassis, and body electronics. It is not Grade 0 (−40°C to +150°C) or Grade 2 (−40°C to +105°C); Grade 1 is the highest standard supported for this SOT-23 variant of the LM4041-N family.
LM4041DEM3-1.2/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
LM4041DEM3-1.2/NOPB FAQ
1.How can I place an order for LM4041DEM3-1.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DEM3-1.2/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 LM4041DEM3-1.2/NOPB reliable?
The price and inventory of LM4041DEM3-1.2/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DEM3-1.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4041DEM3-1.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DEM3-1.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041DEM3-1.2/NOPB?
LM4041DEM3-1.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DEM3-1.2/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 LM4041DEM3-1.2/NOPB?
For technical support, including LM4041DEM3-1.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DEM3-1.2/NOPB requirements.
6.How does Aetrix verify that LM4041DEM3-1.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4041DEM3-1.2/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 LM4041DEM3-1.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4041DEM3-1.2/NOPB?
All LM4041DEM3-1.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DEM3-1.2/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 LM4041DEM3-1.2/NOPB part is unused and in its original packaging.
Return procedure for LM4041DEM3-1.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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