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Texas Instruments LM4041QDEM3-1.2/NO
- Part No.:
- LM4041QDEM3-1.2/NO
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041QDEM3-1.2/NO.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LM4041QDEM3-1.2/NO from Texas Instruments is an automotive-grade precision micropower shunt voltage reference in SOT-23-3 package, delivering a fixed 1.225 V reverse breakdown voltage with ±12 mV (±0.98%) initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and stable operation from 68 μA to 12 mA load current - used for ADC/DAC biasing and sensor excitation in engine control units.
For engineers reviewing the LM4041QDEM3-1.2/NO datasheet, LM4041QDEM3-1.2/NO pinout, LM4041QDEM3-1.2/NO application, or LM4041QDEM3-1.2/NO equivalent, key selection criteria include extended-temperature (–40°C to +125°C) automotive qualification, no-output-capacitor stability, low 20 μVrms noise (10 Hz–10 kHz), and compatibility with capacitive loads in space-constrained PCB layouts.
Technical Context
The LM4041QDEM3-1.2/NO implements a bandgap-based shunt reference architecture with curvature-corrected temperature drift compensation and Zener-zap wafer-level trimming to achieve ±12 mV initial accuracy. It operates as a two-terminal device where cathode supplies both shunt current path and output voltage node.
Its design eliminates external stabilization capacitance by maintaining phase margin across 0–10 nF capacitive loads and supports full 68 μA–12 mA operating current range without oscillation - enabling direct use in battery-powered instrumentation and automotive subsystems with variable supply impedance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V reverse breakdown voltage; sets precise bias point for analog signal chains. |
| Initial Tolerance | ±12 mV (±0.98%) at 25°C; ensures <1% error before temperature or aging effects. |
| Temp Coefficient | ≤100 ppm/°C max over –40°C to +125°C; limits drift to ±12.3 mV across full automotive range. |
| Operating Current | 68 μA min to 12 mA max; supports ultra-low-power sensor nodes and high-current DAC references. |
| Noise (10 Hz–10 kHz) | 20 μVrms; enables high-resolution (<16-bit) measurements without added filtering. |
| Long-Term Stability | 120 ppm after 1000 hrs; predicts <0.012% output shift over typical product lifetime. |
| Dynamic Impedance | 0.5–1.5 Ω at 1 mA; maintains regulation under fast load transients in closed-loop systems. |
Pinout & Package
SOT-23-3 package (1.30 mm × 2.92 mm body size), surface-mount, thermally enhanced plastic case rated for automotive ambient temperatures up to +125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode | Shunt current sink & output voltage node | Connected to regulated voltage rail; sinks all excess current to maintain 1.225 V. |
| Anode | Reference ground terminal | Typically tied to system ground; defines return path for shunt current and reference potential. |
| NC | No-connect terminal | Internally unconnected; must remain floating or tied to anode per datasheet guidance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for automotive applications from –40°C to +125°C ambient with zero derating. |
| No output capacitor required | Stable with 0–10 nF capacitive loads; eliminates BOM cost and board area for bulk capacitance. |
| Tolerates capacitive loads | Immune to instability from PCB trace capacitance or downstream filter networks. |
| Low quiescent current | 68 μA minimum operating current enables >10-year battery life in always-on sensors. |
| Low thermal hysteresis | 0.08% voltage shift after –40°C/+125°C thermal cycling; preserves calibration integrity. |
Applications
| Engine Control Unit (ECU) Sensor Biasing | Portable Gas Detector Signal Conditioning |
|---|---|
Use Scenario: Provides stable excitation voltage for resistive oxygen and NOx sensors in exhaust manifolds subject to rapid thermal cycling. IC Role / Device Role / Timing Role: Shunt reference supplying 1.225 V bias to sensor bridge; regulates against 12 V battery ripple and load dump transients. Use Value: 100 ppm/°C tempco and 0.08% thermal hysteresis ensure <±0.5% total error across –40°C to +125°C engine bay operation. |
Use Scenario: Powers precision analog front-end of handheld gas analyzers using electrochemical cells with microamp-level output currents. IC Role / Device Role / Timing Role: Low-noise (20 μVrms) voltage reference for 16-bit SAR ADC reference input in battery-operated field instruments. Use Value: 68 μA minimum current enables >5-year operation on CR2032 coin cell; no-output-capacitor design simplifies layout in compact enclosures. |
| Automotive Cabin Temperature Monitoring | Industrial Process Controller ADC Reference |
Use Scenario: Supplies reference voltage for thermistor-to-digital conversion in HVAC control modules mounted near vehicle dashboards. IC Role / Device Role / Timing Role: Fixed 1.225 V shunt reference driving ratiometric measurement circuitry with microcontroller ADC. Use Value: AEC-Q100 Grade 1 qualification guarantees reliability over 15-year vehicle service life; ±12 mV initial tolerance meets ASIL-B functional safety requirements. |
Use Scenario: Stabilizes reference input for 24-bit delta-sigma ADCs measuring pressure, flow, and level in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Precision shunt reference replacing larger three-terminal references to reduce footprint in dense I/O card designs. Use Value: 1.5 Ω dynamic impedance ensures <1 LSB error during 10 mA step load changes; SC70/SOT-23 package compatibility allows drop-in replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4041CDEM3-1.2 | Same SOT-23-3 package and 1.225 V output, but industrial-grade (–40°C to +85°C) with ±6 mV initial tolerance. | Lacks AEC-Q100 qualification; unsuitable for under-hood automotive use but lower cost for non-automotive industrial designs. | Select when automotive qualification is unnecessary and tighter initial tolerance (±0.49% vs ±0.98%) is prioritized over temperature range. |
| TLVH431AQDBVRQ1 | Adjustable shunt reference (1.24–18 V) with 2% initial tolerance, higher 80 μA min current, and Q1 qualification. | Requires two external resistors for 1.225 V setting; introduces resistor tolerance and thermal drift errors absent in fixed-voltage LM4041QDEM3-1.2/NO. | Choose only if system requires programmable output or higher voltage; avoid when fixed 1.225 V and minimal component count are critical. |
Compared with LM4041CDEM3-1.2 and TLVH431AQDBVRQ1, the LM4041QDEM3-1.2/NO uniquely combines AEC-Q100 Grade 1 qualification, fixed 1.225 V output, ±12 mV tolerance, and no-capacitor stability - making it the only option meeting stringent automotive ECU sensor biasing requirements without design compromises.
Availability
LM4041QDEM3-1.2/NO is available at Aetrix Electronics and suitable for automotive engine control, portable instrumentation, and industrial process monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041QDEM3-1.2/NO 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 qualification.
The LM4041-N-Q1 product line delivers AEC-Q100-qualified shunt voltage references optimized for harsh-environment automotive subsystems including powertrain, chassis, and body electronics where reliability and parametric stability are mission-critical.
FAQ
What is the maximum operating temperature range for LM4041QDEM3-1.2/NO?
The LM4041QDEM3-1.2/NO is qualified per AEC-Q100 Grade 1, supporting continuous operation from –40°C to +125°C ambient temperature. This rating applies to the full electrical specification - including ±12 mV initial tolerance and ≤100 ppm/°C temperature coefficient - without derating. The SOT-23-3 package's thermal resistance (291.9°C/W) enables reliable performance in engine bay and transmission control module environments.
Does LM4041QDEM3-1.2/NO require an external output capacitor?
No, the LM4041QDEM3-1.2/NO does not require an external output capacitor. Its internal design ensures stability with any capacitive load from 0 to 10 nF, eliminating the need for bulk capacitance in space-constrained applications like automotive sensor modules and portable test equipment. This feature reduces BOM count, PCB area, and potential failure points associated with electrolytic or ceramic capacitors.
What is the minimum operating current for LM4041QDEM3-1.2/NO?
The LM4041QDEM3-1.2/NO has a minimum operating current of 68 μA at 25°C, increasing to 73 μA across the full –40°C to +125°C temperature range. This ultra-low quiescent current enables multi-year battery operation in always-on automotive cabin sensors and IoT edge devices. Operation below 68 μA risks loss of regulation and increased output impedance.
How does the LM4041QDEM3-1.2/NO differ from standard LM4041-N variants?
The LM4041QDEM3-1.2/NO is the AEC-Q100 Grade 1 qualified version of the LM4041-N family, manufactured and tested to automotive reliability standards including extended temperature operation (–40°C to +125°C), enhanced ESD robustness (±2 kV HBM), and rigorous lot acceptance testing. Standard LM4041-N parts lack this qualification and are rated only for industrial (–40°C to +85°C) or commercial temperature ranges.
Can LM4041QDEM3-1.2/NO be used in place of LM4041AIM3-1.2?
Yes, the LM4041QDEM3-1.2/NO is pin-compatible and functionally equivalent to LM4041AIM3-1.2 in SOT-23-3 package, but with key differences: it uses Grade D (±12 mV) instead of Grade A (±1.2 mV) initial tolerance and adds AEC-Q100 Grade 1 qualification. It is a direct replacement where automotive qualification and wider tolerance are acceptable - such as in non-safety-critical engine sensors - but not where <±0.1% initial accuracy is mandatory.
LM4041QDEM3-1.2/NO 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041QDEM3-1.2/NO FAQ
1.How can I place an order for LM4041QDEM3-1.2/NO through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041QDEM3-1.2/NO 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 LM4041QDEM3-1.2/NO reliable?
The price and inventory of LM4041QDEM3-1.2/NO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041QDEM3-1.2/NO is usually 5 days.
3.What payment methods are accepted for LM4041QDEM3-1.2/NO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041QDEM3-1.2/NO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041QDEM3-1.2/NO?
LM4041QDEM3-1.2/NO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041QDEM3-1.2/NO 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 LM4041QDEM3-1.2/NO?
For technical support, including LM4041QDEM3-1.2/NO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041QDEM3-1.2/NO requirements.
6.How does Aetrix verify that LM4041QDEM3-1.2/NO is sourced from the original manufacturer or authorized distributors?
All LM4041QDEM3-1.2/NO 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 LM4041QDEM3-1.2/NO meets industry standards.
7.What is the process for return or replacement of LM4041QDEM3-1.2/NO?
All LM4041QDEM3-1.2/NO units undergo pre-shipment inspection (PSI). If there is an issue with LM4041QDEM3-1.2/NO, 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 LM4041QDEM3-1.2/NO part is unused and in its original packaging.
Return procedure for LM4041QDEM3-1.2/NO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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