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Texas Instruments LM4041DQDBZT
- Part No.:
- LM4041DQDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DQDBZT.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,511
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Product details
Overview
LM4041DQDBZT from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 (DBZ) package, delivering a fixed 1.225 V output with ±1.0% initial tolerance (D grade) and 150 ppm/°C max temperature coefficient across –40°C to 125°C. It operates from 45 μA to 12 mA cathode current, exhibits 20 μVRMS wideband noise, and requires no output capacitor-enabling use in battery-powered instrumentation and power-supply monitors.
For engineers reviewing the LM4041DQDBZT datasheet, LM4041DQDBZT pinout, LM4041DQDBZT application, or LM4041DQDBZT equivalent, this page provides verified specifications, thermal and noise performance data, pin-level functional roles, real-world application contexts for high-accuracy analog systems, and validated alternative options for design flexibility under extended temperature conditions.
Technical Context
The LM4041DQDBZT implements a Zener-based shunt reference architecture trimmed via Zener-zap during wafer sort to achieve its D-grade tolerance. Its internal feedback path enables stable regulation without external capacitors, even under varying capacitive loads up to 1 μF.
Designed for Q-grade operation (–40°C to 125°C), it maintains low dynamic impedance (≤2 Ω at 1 mA) and tight long-term stability (120 ppm after 1000 h), supporting precision data acquisition and automotive-grade power monitoring where thermal drift and aging must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; supports accurate ADC/DAC biasing and sensor excitation at low power. |
| Initial Tolerance | ±1.0% max at 25°C (D grade); ensures predictable system offset without calibration in cost-sensitive designs. |
| Temp Coefficient | 150 ppm/°C max over –40°C to 125°C; limits output drift to <±1.85 mV across full operating range. |
| Noise (10 Hz–10 kHz) | 20 μVRMS typical; preserves signal integrity in high-resolution measurement front-ends. |
| Operating Current | 45 μA min to 12 mA max cathode current; enables ultra-low-power sleep modes and robust load regulation. |
| Dynamic Impedance | ≤2 Ω at 1 mA (25°C); minimizes output voltage shift under transient load changes. |
| Long-Term Stability | 120 ppm after 1000 h at 25°C; reduces recalibration frequency in field-deployed equipment. |
Pinout & Package
SOT-23-3 (DBZ) package: compact 2.92 mm × 1.3 mm surface-mount outline with gull-wing leads, optimized for space-constrained PCBs and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink and output node | Connects to regulated voltage rail; carries total current (load + reference bias); sets output voltage via external series resistor. |
| Anode (Pin 2) | Reference ground reference | Must be connected to system ground; serves as return path for cathode current and defines output voltage reference point. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to Anode (Pin 2) per TI EMI mitigation guidance-no active circuit function. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Stable with all capacitive loads (0–1 μF); eliminates BOM cost and layout area for output bypass caps. |
| Micropower operation | 45 μA minimum cathode current enables >10-year battery life in always-on sensing nodes. |
| Extended temperature range | Rated for –40°C to 125°C ambient; qualified for under-hood automotive and industrial control environments. |
| Low noise performance | 20 μVRMS (10 Hz–10 kHz) supports 16-bit+ resolution in portable data loggers and precision transmitters. |
| Zener-zap trimming | Fuse-based wafer-level calibration achieves ±1.0% tolerance without post-package adjustment. |
Applications
| Portable Instrumentation | Automotive Power Monitoring |
|---|---|
|
Use Scenario: Handheld multimeter measuring DC voltage with 0.1% accuracy requirement. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225 V reference for 24-bit sigma-delta ADC. Use Value: Enables single-supply operation with <±1.2 mV total error budget across –10°C to 50°C ambient. |
Use Scenario: Battery management system monitoring 12 V lead-acid voltage in start-stop vehicles. IC Role / Device Role / Timing Role: Precision shunt reference for microcontroller ADC input scaling. Use Value: Maintains <±15 mV reference error over –40°C to 125°C engine bay temperatures. |
| Energy Metering | Industrial Process Transmitter |
|
Use Scenario: DIN-rail mounted kWh meter requiring metrology-grade voltage reference. IC Role / Device Role / Timing Role: Fixed-voltage reference for anti-aliasing filter and ADC reference buffer. Use Value: Contributes <0.02% of total system error budget over 10-year field deployment. |
Use Scenario: 4–20 mA loop-powered pressure transmitter operating in chemical plant environments. IC Role / Device Role / Timing Role: Low-drift shunt reference for DAC output scaling and sensor excitation. Use Value: Delivers <±0.05% full-scale error stability across 40°C/hour thermal transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | 2.5 V adjustable reference; ±2% tolerance; 50 ppm/°C typical; requires external resistors for 1.225 V setting. | Higher output voltage necessitates resistor divider, increasing component count and thermal drift uncertainty. | Choose when existing designs already use TL431 and 1.225 V is derived via precision resistors. |
| MAX6008BAUT12+T | 1.225 V fixed; ±0.2% tolerance; 75 ppm/°C max; SOT-23-3; rated –40°C to 125°C. | Superior initial accuracy and tempco, but higher quiescent current (60 μA min) and limited long-term stability data. | Prefer for highest-accuracy applications where tighter tolerance justifies cost premium and supply headroom allows. |
Compared with TL431CDBZR and MAX6008BAUT12+T, the LM4041DQDBZT offers the lowest minimum operating current (45 μA), best balance of cost and extended-temperature reliability, and proven 120 ppm long-term stability-making it optimal for battery-powered and automotive-qualified systems where power and aging matter.
Availability
LM4041DQDBZT is available at Aetrix Electronics and suitable for portable instrumentation, automotive power monitoring, and energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041DQDBZT 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-qualified components.
The LM4041 product line delivers micropower shunt references optimized for space-constrained, thermally demanding applications-including automotive, industrial, and portable instrumentation-where low drift, low noise, and capacitor-free stability are critical.
FAQ
What is the maximum operating temperature for LM4041DQDBZT?
The LM4041DQDBZT is characterized for operation from –40°C to +125°C ambient temperature. This Q-grade rating makes it suitable for under-hood automotive applications and industrial control systems exposed to elevated thermal stress. The device maintains specified electrical performance-including 150 ppm/°C max temperature coefficient and ±1.0% initial tolerance-throughout this full range.
Does LM4041DQDBZT require an output capacitor for stability?
No, the LM4041DQDBZT does not require an output capacitor for stability. Its internal design ensures unconditional stability with all capacitive loads (0–1 μF), eliminating the need for external bypass components. This simplifies PCB layout, reduces BOM count, and improves reliability in space-constrained or high-reliability applications.
What is the minimum cathode current needed for LM4041DQDBZT to regulate properly?
The LM4041DQDBZT requires a minimum cathode current of 45 μA (typical) at 25°C to maintain regulation. Over the full –40°C to 125°C range, the guaranteed minimum is 80 μA. Designers must ensure the series resistor supplies sufficient current under worst-case conditions (lowest input voltage, highest load current) to keep IZ ≥ 80 μA.
How does the NC pin (Pin 3) on LM4041DQDBZT affect circuit performance?
Pin 3 of the LM4041DQDBZT is a no-connect terminal with no internal connection. TI recommends leaving it floating or tying it directly to the Anode (Pin 2) to mitigate electromagnetic interference in noisy environments-such as near switching regulators or transformers. Improper handling (e.g., routing as a signal trace) may introduce coupling paths that degrade reference accuracy.
Can LM4041DQDBZT be used in place of LM4041CQDBZT in a new design?
Yes, the LM4041DQDBZT can replace the LM4041CQDBZT in most designs, though with relaxed initial tolerance (±1.0% vs. ±0.5%) and higher temperature coefficient (150 ppm/°C vs. 100 ppm/°C). If system-level accuracy budgets allow this trade-off-and cost or inventory consolidation is prioritized-the D-grade part provides identical package, pinout, and extended-temperature qualification.
LM4041DQDBZT 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:
- 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
LM4041DQDBZT FAQ
1.How can I place an order for LM4041DQDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DQDBZT 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 LM4041DQDBZT reliable?
The price and inventory of LM4041DQDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DQDBZT is usually 5 days.
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4.How is shipping managed for LM4041DQDBZT?
LM4041DQDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DQDBZT 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 LM4041DQDBZT?
For technical support, including LM4041DQDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DQDBZT requirements.
6.How does Aetrix verify that LM4041DQDBZT is sourced from the original manufacturer or authorized distributors?
All LM4041DQDBZT 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 LM4041DQDBZT meets industry standards.
7.What is the process for return or replacement of LM4041DQDBZT?
All LM4041DQDBZT units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DQDBZT, 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 LM4041DQDBZT part is unused and in its original packaging.
Return procedure for LM4041DQDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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