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Texas Instruments LM4041DQDBZTG4
- Part No.:
- LM4041DQDBZTG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DQDBZTG4.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,082
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Product details
Overview
LM4041DQDBZTG4 from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225V output, ±1.0% initial tolerance (D grade), 150ppm/°C max temperature coefficient, and 20μVRMS typical wideband noise. It operates from 45μA to 12mA cathode current and is stable with all capacitive loads-no output capacitor required. It serves as a low-drift, low-noise reference in battery-powered instrumentation and automotive power-supply monitors.
For engineers reviewing the LM4041DQDBZTG4 datasheet, LM4041DQDBZTG4 pinout, LM4041DQDBZTG4 application, or LM4041DQDBZTG4 equivalent, key selection criteria include its D-grade accuracy over –40°C to 125°C, SOT-23-3 (DBZ) package compatibility, cathode/anode terminal behavior in shunt regulator topologies, and feedback-pin-free operation in fixed-voltage mode.
Technical Context
The LM4041DQDBZTG4 implements a Zener-based shunt reference architecture trimmed via Zener-zap during wafer sort to achieve D-grade (±1.0%) output tolerance. Its internal structure includes a low-dynamic-impedance core (≤2Ω at 1mA) and integrated ESD protection rated at ±2kV HBM.
It is characterized for extended temperature operation (–40°C to 125°C) and supports both fixed-output (1.225V) and adjustable configurations-though LM4041DQDBZTG4 is the fixed-voltage variant in DBZ package with Q-temp rating. No external capacitor is needed for stability, and it maintains <2.5mV output variation across 45μA–12mA cathode current range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V nominal fixed output; enables direct replacement of legacy 1.2V references without resistor divider. |
| Initial Tolerance | ±1.0% max at 25°C (D grade); defines worst-case DC error budget before temperature and load effects. |
| Temp Coefficient | 150ppm/°C max over –40°C to 125°C; contributes ≤18.6mV drift across full Q-temp range. |
| Output Noise | 20μVRMS typical (10Hz–10kHz); critical for high-resolution ADC biasing and precision DAC references. |
| Cathode Current Range | 45μA to 12mA; supports ultra-low-power sensor nodes and high-current monitoring circuits without redesign. |
| Dynamic Impedance | ≤2Ω at 1mA (120Hz); ensures minimal output perturbation under dynamic load transients. |
| ESD Rating | ±2000V HBM; meets industrial handling requirements without additional input protection circuitry. |
Pinout & Package
LM4041DQDBZTG4 is packaged in a 3-pin SOT-23 (DBZ) surface-mount package with 1.0mm pitch, 2.92mm × 1.3mm footprint, and 1.1mm height-optimized for space-constrained PCB layouts in portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink and output node | Connects to supply rail via series resistor; regulates voltage by sinking excess current to anode. |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; forms the 0V reference point for output voltage measurement. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to anode per TI EMI mitigation guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Eliminates BOM cost and layout area for bypass caps while maintaining phase margin >45° across 1pF–10μF loads. |
| Micropower operation | 45μA minimum cathode current enables 10+ year battery life in coin-cell–powered IoT sensors. |
| Extended temperature range | –40°C to 125°C operation supports under-hood automotive and industrial motor-control applications. |
| Low long-term drift | 120ppm shift after 1000 hours ensures calibration stability in metering and test equipment. |
| High ESD robustness | ±2kV HBM rating reduces field failure risk in automated assembly and end-equipment handling. |
Applications
| Energy Metering | Automotive Power Monitoring |
|---|---|
Use Scenario: High-accuracy AC energy measurement in Class 0.2 smart meters requiring stable 1.225V reference for sigma-delta ADC biasing. IC Role / Device Role / Timing Role: Shunt voltage reference providing ratiometric excitation for current-sense resistors and precision scaling for analog front-end. Use Value: 150ppm/°C tempco and 20μVRMS noise ensure <0.05% total error contribution over temperature and time. | Use Scenario: Monitoring 12V battery voltage and 5V rail integrity in ADAS domain controllers operating at 125°C junction temperature. IC Role / Device Role / Timing Role: Fixed-voltage shunt reference supplying reference input to comparator-based undervoltage lockout (UVLO) circuitry. Use Value: Q-temp rating and ±1.0% tolerance guarantee reliable trip-point accuracy across engine bay thermal cycles. |
| Portable Medical Sensors | Industrial Process Transmitters |
Use Scenario: Low-power pulse oximeter with optical front-end requiring stable reference for photodiode TIA gain setting and ADC reference. IC Role / Device Role / Timing Role: Micropower shunt reference enabling sub-100μA system sleep current while maintaining 1.225V accuracy. Use Value: 45μA min cathode current allows direct connection to high-impedance LDO outputs without dropper resistors. | Use Scenario: 4–20mA loop-powered pressure transmitter where reference stability directly impacts span accuracy over –40°C to 85°C ambient. IC Role / Device Role / Timing Role: Primary voltage reference for DAC output scaling and sensor signal conditioning amplifier biasing. Use Value: 120ppm long-term drift and 150ppm/°C tempco meet IEC 61290-1 Class 1.0 repeatability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBZR | 2.495V adjustable output; requires external resistors; higher 100μA min cathode current; 50ppm/°C tempco (A grade) | Used where higher reference voltage or programmability is needed; unsuitable for direct 1.225V replacement | Select TL431ACDBZR only when 2.5V reference or adjustable topology is required; not drop-in for LM4041DQDBZTG4. |
| MAX6008AEUR+T | 1.25V output; ±0.2% initial tolerance (A grade); 75ppm/°C tempco; SC70-3 package; 60μA min cathode current | Better accuracy and lower drift, but limited to –40°C to 85°C; higher quiescent current increases power budget | Choose MAX6008AEUR+T for industrial data acquisition needing tighter tolerance, but verify thermal derating at 125°C. |
Compared with TL431ACDBZR and MAX6008AEUR+T, LM4041DQDBZTG4 uniquely combines 1.225V fixed output, Q-temp rating, micropower operation, and zero-capacitor stability-making it optimal for space- and power-constrained automotive and portable designs where 1.2V-class references are specified.
Availability
LM4041DQDBZTG4 is available at Aetrix Electronics and suitable for energy metering, automotive power monitoring, portable medical sensors, and industrial process transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041DQDBZTG4 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 company delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LM4041 product line delivers precision shunt voltage references optimized for micropower, low-noise, and extended-temperature applications-including battery-powered instrumentation, automotive subsystems, and high-reliability industrial control.
FAQ
What is the output voltage and tolerance of LM4041DQDBZTG4?
LM4041DQDBZTG4 provides a fixed 1.225V output with ±1.0% maximum initial tolerance at 25°C (D grade). This tolerance holds across its full operating temperature range of –40°C to 125°C, making LM4041DQDBZTG4 suitable for automotive and industrial environments where wide thermal margins are required.
Does LM4041DQDBZTG4 require an external output capacitor?
No, LM4041DQDBZTG4 is internally compensated and stable with all capacitive loads-from 0pF up to 10μF-so no external output capacitor is required. This simplifies design, reduces BOM count, and eliminates capacitor-related aging or ESR instability concerns in LM4041DQDBZTG4 implementations.
What package type and pin configuration does LM4041DQDBZTG4 use?
LM4041DQDBZTG4 uses the SOT-23-3 (DBZ) package with standard pinout: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC. The NC pin must remain floating or be tied to the anode per TI's EMI mitigation guidance-ensuring robust operation in noisy automotive and industrial settings.
How does LM4041DQDBZTG4 perform in low-power applications?
LM4041DQDBZTG4 operates down to 45μA cathode current, enabling multi-year battery life in coin-cell–powered devices. Its micropower capability, combined with 20μVRMS noise and 150ppm/°C tempco, makes LM4041DQDBZTG4 ideal for always-on sensor nodes and portable medical instruments where power and precision are co-constrained.
Is LM4041DQDBZTG4 qualified for automotive applications?
Yes, LM4041DQDBZTG4 is characterized for –40°C to 125°C operation (Q-temp grade) and carries AEC-Q100 stress-test alignment per TI's qualification protocol. Its ±1.0% tolerance, 150ppm/°C tempco, and ±2kV HBM ESD rating make LM4041DQDBZTG4 appropriate for non-safety-critical automotive subsystems including body control modules and powertrain sensors.
LM4041DQDBZTG4 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:
- Discontinued at Digi-Key
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.233V
- Voltage - Output (Max):
- 10 V
- 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:
- 80 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041DQDBZTG4 FAQ
1.How can I place an order for LM4041DQDBZTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DQDBZTG4 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 LM4041DQDBZTG4 reliable?
The price and inventory of LM4041DQDBZTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DQDBZTG4 is usually 5 days.
3.What payment methods are accepted for LM4041DQDBZTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DQDBZTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041DQDBZTG4?
LM4041DQDBZTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DQDBZTG4 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 LM4041DQDBZTG4?
For technical support, including LM4041DQDBZTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DQDBZTG4 requirements.
6.How does Aetrix verify that LM4041DQDBZTG4 is sourced from the original manufacturer or authorized distributors?
All LM4041DQDBZTG4 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 LM4041DQDBZTG4 meets industry standards.
7.What is the process for return or replacement of LM4041DQDBZTG4?
All LM4041DQDBZTG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DQDBZTG4, 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 LM4041DQDBZTG4 part is unused and in its original packaging.
Return procedure for LM4041DQDBZTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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