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Texas Instruments LM4041DIDBZR
- Part No.:
- LM4041DIDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DIDBZR.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,765
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Product details
Overview
LM4041DIDBZR from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a fixed 1.225 V output with ±1.0% initial tolerance (D grade), 150 ppm/°C max temperature coefficient, 20 μVRMS wideband noise, and stable operation from 45 μA to 12 mA cathode current. It enables high-accuracy voltage monitoring in battery-powered instrumentation and low-power data-acquisition systems.
For engineers reviewing the LM4041DIDBZR datasheet, LM4041DIDBZR pinout, LM4041DIDBZR application, or LM4041DIDBZR equivalent, this page provides verified technical context, pin-level design meaning, real-world use cases in power-supply monitors and energy metering, and validated alternative options for cost-performance trade-offs.
Technical Context
The LM4041DIDBZR operates as a two-terminal shunt reference, sinking cathode current to maintain a precise 1.225 V across its terminals without requiring an external output capacitor. Its Zener-zap trimmed bandgap core achieves tight initial tolerance and low dynamic impedance (≤2 Ω at 1 mA), enabling stable regulation under varying load and supply conditions.
Designed for industrial temperature range (–40°C to +85°C), it features low quiescent current (45 μA typical), high ESD robustness (±2 kV HBM), and immunity to capacitive loading-making it suitable for space-constrained, noise-sensitive analog front-ends in portable test equipment and automotive body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; supports accurate ADC reference and sensor biasing without external resistors. |
| 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 +85°C; limits drift to ≤185 μV over full range for stable long-term measurements. |
| Noise (10 Hz–10 kHz) | 20 μVRMS typical; minimizes added uncertainty in high-resolution 16-bit+ data acquisition paths. |
| Cathode Current Range | 45 μA to 12 mA; allows direct use with microamp-level sensor interfaces or higher-current analog circuitry. |
| Dynamic Impedance | ≤2 Ω at 1 mA (120 Hz); maintains output stability during fast load transients in switched-mode power monitor circuits. |
| ESD Rating | ±2000 V HBM; withstands handling and board-level ESD events without performance degradation. |
Pinout & Package
SOT-23-3 (DBZ) package: ultra-compact surface-mount outline (2.92 mm × 1.3 mm × 1.02 mm), JEDEC-compliant, RoHS-compliant, tape-and-reel compatible (3000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink / output node | Connects to regulated voltage node; sinks all current not drawn by load; sets output voltage via external series resistor. |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; forms return path for cathode current; defines 0 V reference point. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to Anode (Pin 2) per TI recommendation to suppress EMI coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates reliably with any capacitive load (0–∞ F); eliminates need for output bypass capacitor in space-constrained PCB layouts. |
| Micropower operation | 45 μA minimum cathode current enables use in always-on battery monitors with multi-year runtime. |
| Wide operating current | Supports 45 μA–12 mA cathode range; accommodates both ultra-low-power sensors and moderate-current analog stages. |
| Low thermal drift | 150 ppm/°C max tempco ensures <±0.15% output variation across industrial temperature range. |
| High ESD immunity | ±2 kV HBM rating reduces risk of field failure during assembly or end-use in harsh environments. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution ADC reference in portable multimeters and environmental sensor nodes. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference voltage for SAR ADC conversion, directly determining measurement accuracy. Use Value: 20 μVRMS noise and 150 ppm/°C drift ensure ≤0.01% total error contribution over temperature and time. | Use Scenario: Precision undervoltage/overvoltage detection in DC-DC converter feedback loops. IC Role / Device Role / Timing Role: Shunt reference generating threshold voltage for comparator-based fault signaling. Use Value: Fixed 1.225 V output with ±1.0% tolerance enables reliable trip-point setting without trimming resistors. |
| Energy Management/Metering | Battery-Powered Equipment |
Use Scenario: Reference for current-sense amplifier in smart electricity meters with Class 0.5 accuracy. IC Role / Device Role / Timing Role: Supplies reference voltage to isolated current-shunt amplifiers measuring mains-phase currents. Use Value: Low 45 μA min current and no-output-capacitor requirement reduce standby power and BOM count. | Use Scenario: Voltage supervisor in lithium coin-cell–powered IoT edge nodes (e.g., BLE sensors). IC Role / Device Role / Timing Role: Enables low-threshold brownout detection by feeding regulated 1.225 V into comparator input. Use Value: Micropower operation extends battery life beyond 5 years while maintaining ±1.0% trip accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBVR | Adjustable 2.495 V output; 2% initial tolerance; 50 μA min cathode current; requires external resistors for 1.225 V setup. | Higher output voltage necessitates resistor divider, adding error sources and board area; less suitable for direct 1.225 V use. | Select when adjustable output or higher voltage reference is needed; avoid for fixed 1.225 V due to added complexity and tolerance stacking. |
| REF3012AIDBZR | Series reference; 1.2 V output; 0.2% initial tolerance; 50 μA supply current; requires output capacitor. | Three-terminal architecture demands separate input/output pins and decoupling cap; incompatible with shunt topology constraints. | Choose for ultra-low-drift (50 ppm/°C) where layout permits series configuration and extra capacitance. |
Compared with TL431ACDBVR and REF3012AIDBZR, the LM4041DIDBZR offers direct 1.225 V shunt operation with minimal external components, lower noise, and guaranteed capacitor-free stability-making it optimal for compact, low-power, fixed-voltage reference applications.
Availability
LM4041DIDBZR is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and battery-powered equipment requiring stable component supply with industrial temperature support and long-term parametric consistency.
Supply support for LM4041DIDBZR 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 high-volume manufacturing.
The LM4041 product line delivers micropower shunt references optimized for cost-sensitive, space-constrained applications demanding stable voltage references across industrial and automotive temperature ranges.
FAQ
What is the output voltage and tolerance of the LM4041DIDBZR?
The LM4041DIDBZR provides a fixed 1.225 V nominal output voltage with a maximum initial tolerance of ±1.0% at 25°C (D grade). This tolerance holds across the full industrial temperature range (–40°C to +85°C), and the device maintains stability without external capacitors or trimming components. The LM4041DIDBZR's specified tolerance ensures predictable performance in uncalibrated systems such as portable meters and basic power monitors.
Does the LM4041DIDBZR require an output capacitor for stability?
No, the LM4041DIDBZR does not require an output capacitor for stability-it is explicitly designed to remain stable with all capacitive loads, including 0 F. This eliminates the need for external bypass components in space-constrained designs. While adding a capacitor does not harm operation, it provides no stability benefit for the LM4041DIDBZR. This behavior is confirmed in TI's datasheet Section 7.1 and applies directly to the LM4041DIDBZR in its SOT-23-3 (DBZ) package.
What is the minimum cathode current required for proper operation of the LM4041DIDBZR?
The LM4041DIDBZR requires a minimum cathode current of 45 μA (typical) to maintain regulation, with a maximum rated cathode current of 12 mA. At currents below 45 μA, output voltage may deviate outside specification. This low minimum current enables use in ultra-low-power applications such as coin-cell–powered sensors. The LM4041DIDBZR's datasheet specifies this value across temperature and confirms it for the D-grade industrial variant.
How does the LM4041DIDBZR compare to the LM4041AIDBZR in terms of accuracy?
The LM4041DIDBZR has a maximum initial tolerance of ±1.0% and a temperature coefficient of 150 ppm/°C, whereas the LM4041AIDBZR offers ±0.1% tolerance and 100 ppm/°C max tempco. Both share identical pinout, package, and operating current range. The LM4041DIDBZR trades precision for cost reduction-making it appropriate for applications where ±1% accuracy suffices, such as non-critical voltage supervision or coarse analog sensing. The LM4041DIDBZR remains fully drop-in compatible with A-grade variants in the same DBZ package.
Can the LM4041DIDBZR be used in automotive applications?
The LM4041DIDBZR is qualified for the industrial temperature range (–40°C to +85°C), not the extended automotive AEC-Q100 Grade 1 (–40°C to +125°C) range. For automotive cabin or engine-bay applications requiring operation above 85°C, TI's LM4041Q variants (e.g., LM4041DQDBZR) are specified up to +125°C and undergo additional qualification testing. The LM4041DIDBZR is suitable only for non-under-hood automotive subsystems with controlled ambient temperatures, such as infotainment power rails or dashboard display biasing.
LM4041DIDBZR 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041DIDBZR FAQ
1.How can I place an order for LM4041DIDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DIDBZR 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 LM4041DIDBZR reliable?
The price and inventory of LM4041DIDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DIDBZR is usually 5 days.
3.What payment methods are accepted for LM4041DIDBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DIDBZR transactions.
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4.How is shipping managed for LM4041DIDBZR?
LM4041DIDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DIDBZR 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 LM4041DIDBZR?
For technical support, including LM4041DIDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DIDBZR requirements.
6.How does Aetrix verify that LM4041DIDBZR is sourced from the original manufacturer or authorized distributors?
All LM4041DIDBZR 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 LM4041DIDBZR meets industry standards.
7.What is the process for return or replacement of LM4041DIDBZR?
All LM4041DIDBZR units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DIDBZR, 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 LM4041DIDBZR part is unused and in its original packaging.
Return procedure for LM4041DIDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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