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Texas Instruments LM4041D12IDBZTG4
- Part No.:
- LM4041D12IDBZTG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041D12IDBZTG4.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,240
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Product details
Overview
LM4041D12IDBZTG4 from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225 V output, ±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 - used in high-accuracy power-supply monitors and data-acquisition systems.
For engineers reviewing the LM4041D12IDBZTG4 datasheet, LM4041D12IDBZTG4 pinout, LM4041D12IDBZTG4 application, or LM4041D12IDBZTG4 equivalent, this page delivers verified electrical specs, SOT-23-3 pin functions, industrial-grade thermal performance (–40°C to 85°C), and real-world substitution guidance for low-power analog design.
Technical Context
The LM4041D12IDBZTG4 implements a Zener-based shunt reference architecture trimmed via Zener-zap during wafer sort to achieve its D-grade tolerance. It operates as a two-terminal device requiring only an external series resistor to regulate output voltage across variable loads.
No output capacitor is needed for stability, and it maintains low dynamic impedance (≤2 Ω at 1 mA) and tight voltage regulation over full operating current (45 μA–12 mA) and temperature (–40°C to 85°C), enabling use in battery-powered instrumentation where quiescent current and long-term drift matter.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; enables direct replacement of legacy 1.2 V references without resistor network recalculations. |
| Initial Tolerance | ±1.0% max at 25°C (D grade); supports cost-sensitive industrial designs where ±1% accuracy suffices. |
| Temp Coefficient | 150 ppm/°C max over –40°C to 85°C; ensures <±1.2 mV drift across full industrial range. |
| Operating Current | 45 μA min to 12 mA max cathode current; allows ultra-low-power sensor nodes and high-current biasing in ADC references. |
| Output Noise | 20 μVRMS (10 Hz–10 kHz); preserves signal integrity in 16-bit+ data converters without added filtering. |
| Dynamic Impedance | ≤2 Ω at 1 mA; minimizes load-induced output variation in varying-current applications like supply monitoring. |
| Long-Term Stability | 120 ppm after 1000 h; reduces calibration frequency in field-deployed energy metering hardware. |
Pinout & Package
SOT-23-3 (DBZ) package: compact 2.92 mm × 1.3 mm surface-mount outline with gull-wing leads, rated for reflow per JEDEC Level-1-260°C.
| 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); must be driven above 1.225 V via series resistor. |
| Anode (Pin 2) | Reference ground reference | Typically tied to system ground; forms return path for cathode current; floating anode disables regulation. |
| NC (Pin 3) | No-connect terminal | Must remain unconnected or tied to Anode (Pin 2); avoids parasitic Schottky conduction in DBZ package. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates stably with any capacitive load (0–∞), eliminating need for output bypass caps in space-constrained PCBs. |
| Micropower operation | 45 μA minimum cathode current enables >10-year battery life in always-on IoT sensors using coin cells. |
| Wide current range | Supports 45 μA–12 mA operation without performance degradation - ideal for both ultra-low-power and moderate-current applications. |
| Industrial temperature range | Specified from –40°C to +85°C ambient, ensuring reliable reference performance in factory automation and outdoor metering. |
| Low ESD sensitivity | ±2000 V HBM rating protects against handling damage during manual assembly and board-level testing. |
Applications
| Power-Supply Monitor | Data-Acquisition System |
|---|---|
Use Scenario: Monitoring 3.3 V or 5 V rails in PLC I/O modules for undervoltage lockout and fault reporting. IC Role / Device Role / Timing Role: Shunt reference providing precise threshold voltage to comparator input. Use Value: ±1.0% tolerance ensures accurate trip points across temperature; 150 ppm/°C drift prevents false triggers in hot industrial enclosures. |
Use Scenario: Providing reference voltage for 16-bit SAR ADCs in portable multimeters and handheld analyzers. IC Role / Device Role / Timing Role: Stable DC reference source for analog-to-digital conversion. Use Value: 20 μVRMS noise avoids quantization uncertainty; 45 μA min current enables operation from microcontroller GPIO pins. |
| Energy Metering | Battery-Powered Equipment |
Use Scenario: Reference for metrology-grade ADCs in Class 0.2 electricity meters measuring active/reactive power. IC Role / Device Role / Timing Role: Precision voltage reference for anti-aliasing filter calibration and ADC gain setting. Use Value: 120 ppm long-term stability reduces annual recalibration needs; industrial temp range supports outdoor meter deployment. |
Use Scenario: Voltage reference in wearable health monitors (ECG, pulse oximetry) powered by CR2032 batteries. IC Role / Device Role / Timing Role: Low-quiescent-current shunt reference for sensor signal conditioning. Use Value: 45 μA min current extends battery life beyond 5 years; SOT-23-3 footprint saves space on miniaturized flex PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040D12IDBZR | Same 1.225 V output, ±1.0% tolerance, but higher 200 ppm/°C tempco and 35 μVRMS noise. | Limited to less demanding applications where ±1% accuracy suffices but sub-100 ppm/°C drift is not required. | Select when lower cost is prioritized over noise and thermal stability; verify noise impact on ADC ENOB. |
| REF3012AIDBZR | Series reference (not shunt), 1.2 V output, ±0.2% tolerance, 50 ppm/°C, 28 μVRMS, requires output cap. | Requires external capacitor and higher 50 μA quiescent current; unsuitable for true shunt topologies. | Choose only if board layout permits series configuration and tighter initial accuracy justifies added complexity. |
Compared with LM4040D12IDBZR, LM4041D12IDBZTG4 offers superior thermal stability and lower noise; compared with REF3012AIDBZR, it eliminates output capacitance requirements and reduces minimum operating current by 10×, simplifying low-power shunt regulator design.
Availability
LM4041D12IDBZTG4 is available at Aetrix Electronics and suitable for power-supply monitors, data-acquisition systems, and energy metering applications requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4041D12IDBZTG4 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, embedded processing, and connectivity solutions with deep expertise in precision analog ICs and industrial-grade reliability.
The LM4041 product line delivers micropower shunt voltage references optimized for cost-sensitive, space-constrained applications in industrial, instrumentation, and battery-powered systems - emphasizing low drift, low noise, and capacitor-free operation.
FAQ
What is the operating temperature range for LM4041D12IDBZTG4?
The LM4041D12IDBZTG4 is characterized for operation from –40°C to +85°C ambient temperature. This industrial-grade range is confirmed in Section 5.3 of the TI datasheet and applies specifically to the 'I' suffix variant (e.g., LM4041x12I). The device maintains its ±1.0% initial tolerance and 150 ppm/°C max temperature coefficient across this full range.
Does LM4041D12IDBZTG4 require an output capacitor?
No, LM4041D12IDBZTG4 does not require an output capacitor for stability. As stated in Section 7.1 and Feature list, it is designed to remain stable with all capacitive loads - including 0 μF - making it ideal for space-constrained layouts where adding a capacitor is impractical or undesirable.
What is the minimum cathode current needed for LM4041D12IDBZTG4 to regulate properly?
The LM4041D12IDBZTG4 requires a minimum cathode current of 45 μA (typical) and 80 μA (max over temperature) to maintain regulation within specification. This value is specified in Table 5.4 and 5.5 under IZ,min for the D-grade part and defines the lowest bias current usable in ultra-low-power applications.
How does the pinout of LM4041D12IDBZTG4 differ from adjustable versions?
LM4041D12IDBZTG4 uses the fixed-output DBZ (SOT-23-3) pinout: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC. Adjustable variants (e.g., LM4041BIDBZR) assign Pin 1 as FB (feedback), Pin 2 as Cathode, and Pin 3 as Anode - a fundamentally different terminal mapping confirmed in Figures 4-1 and 4-4 of the datasheet.
Is LM4041D12IDBZTG4 RoHS-compliant and lead-free?
Yes, LM4041D12IDBZTG4 is RoHS-compliant and features lead-free NIPDAU (nickel-palladium-gold) terminal finish, as documented in the Packaging Information table (Orderable Part Number Addendum) and confirmed by TI's official product folder. It meets JEDEC Level-1 moisture sensitivity and 260°C peak reflow requirements.
LM4041D12IDBZTG4 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:
- 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:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041D12IDBZTG4 FAQ
1.How can I place an order for LM4041D12IDBZTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041D12IDBZTG4 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 LM4041D12IDBZTG4 reliable?
The price and inventory of LM4041D12IDBZTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041D12IDBZTG4 is usually 5 days.
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LM4041D12IDBZTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041D12IDBZTG4 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 LM4041D12IDBZTG4?
For technical support, including LM4041D12IDBZTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041D12IDBZTG4 requirements.
6.How does Aetrix verify that LM4041D12IDBZTG4 is sourced from the original manufacturer or authorized distributors?
All LM4041D12IDBZTG4 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 LM4041D12IDBZTG4 meets industry standards.
7.What is the process for return or replacement of LM4041D12IDBZTG4?
All LM4041D12IDBZTG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041D12IDBZTG4, 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 LM4041D12IDBZTG4 part is unused and in its original packaging.
Return procedure for LM4041D12IDBZTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041D12IDBZTG4 Tags
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