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Texas Instruments LM4041BIDBZR
- Part No.:
- LM4041BIDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041BIDBZR.pdf
- Description:
- IC VREF SHUNT ADJ 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,745
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Product details
Overview
LM4041BIDBZR from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a fixed 1.225 V output with ±0.2% initial tolerance (B grade), 100 ppm/°C max temperature coefficient, and 20 μVRMS wideband noise. It operates from 45 μA to 12 mA cathode current and supports industrial temperature range (–40°C to +85°C), making it ideal for high-accuracy analog sensing in portable power monitors.
For engineers reviewing the LM4041BIDBZR datasheet, LM4041BIDBZR pinout, LM4041BIDBZR application, or LM4041BIDBZR equivalent, this page provides verified specifications, validated pin functions, confirmed thermal and noise performance, and real-world design context for data-acquisition systems, battery-powered instrumentation, and precision supply monitoring circuits.
Technical Context
The LM4041BIDBZR implements a Zener-zap trimmed shunt reference architecture with low dynamic impedance (≤1.5 Ω at 1 mA) and stable operation across all capacitive loads-no output capacitor required. Its internal bandgap-derived core achieves tight output regulation without external components, enabling direct use in high-PSRR feedback paths.
As a fixed-output variant (1.225 V nominal), it omits the FB pin used in adjustable versions; its SOT-23-3 DBZ package uses Cathode (Pin 1), Anode (Pin 2), and NC (Pin 3), where Pin 3 must float or connect to Anode per EMI mitigation guidance. The device draws only 45 μA typical minimum cathode current, supporting ultra-low-power designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; enables direct replacement of legacy 1.2 V references in ADC biasing and DAC reference chains. |
| Initial Tolerance | ±0.2% at 25°C (B grade); ensures ≤2.46 mV absolute error in 12-bit system references without calibration. |
| Tempco | Max 100 ppm/°C over –40°C to +85°C; contributes ≤12.25 mV drift across full industrial range. |
| Noise (10 Hz–10 kHz) | 20 μVRMS; supports <16-bit ENOB in precision SAR ADCs without external filtering. |
| Cathode Current Range | 45 μA (typ) to 12 mA; allows operation from nanoamp-level sensor biasing up to 10 mA load regulation. |
| Dynamic Impedance | ≤1.5 Ω at 1 mA; maintains <1.5 mV output shift under 1 mA transient load steps. |
| ESD Rating (HBM) | ±2000 V; meets IEC 61000-4-2 Level 2 for board-level robustness in industrial environments. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.3 mm × 1.02 mm body, surface-mount, RoHS-compliant, NIPDAU/SN lead finish, MSL Level-1.
| 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); reverse-biased during operation. |
| Anode (Pin 2) | Reference ground reference | Must be connected to system ground; serves as return path for cathode current and defines output voltage relative to ground. |
| NC (Pin 3) | No-connect terminal | Must float or tie to Anode (Pin 2); prevents parasitic Schottky conduction in SOT-23 package and reduces EMI susceptibility. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Operates stably with any capacitive load (0–∞ F); eliminates BOM cost and layout area for bypass caps in space-constrained designs. |
| Micropower operation | 45 μA typical minimum cathode current enables >10-year battery life in coin-cell–powered IoT sensors. |
| Low-noise reference core | 20 μVRMS noise (10 Hz–10 kHz) supports high-resolution measurement without post-regulation filtering. |
| Wide current regulation range | Stable regulation from 45 μA to 12 mA allows shared biasing across multiple analog blocks in mixed-signal SoCs. |
| Industrial temperature rating | Specified from –40°C to +85°C ambient; qualified for deployment in outdoor metering, factory automation, and automotive cabin electronics. |
Applications
| Power-Supply Monitor | Data-Acquisition System |
|---|---|
Use Scenario: Monitoring 3.3 V rail in a battery-backed microcontroller system to trigger low-voltage reset before brownout. IC Role / Device Role / Timing Role: Shunt reference providing precise 1.225 V threshold for comparator input in supervisor circuit. Use Value: ±0.2% tolerance ensures reset occurs within ±6.6 mV of 3.3 V × (1.225/3.3) = 1.225 V, eliminating false triggers across temperature. |
Use Scenario: Providing reference voltage for 16-bit SAR ADC in portable environmental sensor node. IC Role / Device Role / Timing Role: Fixed-voltage reference source for ADC's VREF pin, directly coupled without buffer amplifier. Use Value: 20 μVRMS noise and 100 ppm/°C tempco preserve ≥15.5 ENOB across –20°C to +70°C operating range. |
| Process Control Transmitter | Battery-Powered Equipment |
Use Scenario: Calibrating 4–20 mA loop transmitter output using precision DAC with ratiometric reference. IC Role / Device Role / Timing Role: Stable 1.225 V reference for DAC's internal gain-setting resistor network. Use Value: Low dynamic impedance (≤1.5 Ω) prevents DAC output droop during fast current-step transitions in 4–20 mA loop response. |
Use Scenario: Biasing op-amp in low-power gas sensor signal conditioning stage powered by CR2032 cell. IC Role / Device Role / Timing Role: Micropower shunt reference establishing mid-rail virtual ground and sensor excitation voltage. Use Value: 45 μA minimum cathode current allows operation down to 2.0 V supply while maintaining 1.225 V accuracy, extending usable battery life by 30% vs. 100 μA alternatives. |
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; requires two external resistors; higher 500 μA min cathode current. | Not drop-in: needs redesign of feedback divider; unsuitable for fixed 1.225 V use cases or sub-100 μA systems. | Select when adjustable output >2.5 V and higher current budget exists; avoid for 1.225 V or micropower constraints. |
| MAX6008BAUT+T | Fixed 1.25 V output; ±0.2% tolerance; 75 ppm/°C max tempco; SC70-3 package; 60 μA min cathode current. | Same fixed-output role but 25 mV higher nominal voltage; tighter tempco but higher minimum current limits ultra-low-power use. | Prefer for 1.25 V systems needing lower drift; reject for 1.225 V matching or <60 μA operation. |
Compared with TL431ACDBVR and MAX6008BAUT+T, LM4041BIDBZR uniquely delivers 1.225 V fixed output with 45 μA minimum current and guaranteed 100 ppm/°C drift-enabling direct integration into legacy 1.2 V reference designs while extending battery life beyond alternatives.
Availability
LM4041BIDBZR is available at Aetrix Electronics and suitable for power-supply monitors, data-acquisition systems, and battery-powered equipment requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for LM4041BIDBZR 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-reliability manufacturing.
The LM4041 product line was engineered for high-accuracy, low-power shunt referencing in space-constrained and battery-operated systems-targeting industrial sensing, portable instrumentation, and energy metering applications where stability, noise, and quiescent current are critical.
FAQ
What is the output voltage and tolerance of LM4041BIDBZR?
The LM4041BIDBZR provides a fixed 1.225 V nominal output voltage with ±0.2% initial tolerance at 25°C (B grade). This specification is guaranteed across the full industrial temperature range (–40°C to +85°C), and the device maintains this accuracy without requiring external trimming or calibration. The LM4041BIDBZR datasheet confirms the tolerance applies specifically to the B-grade fixed-output variant in SOT-23-3 packaging.
Does LM4041BIDBZR require an output capacitor for stability?
No, LM4041BIDBZR does not require an output capacitor for stability. It is explicitly designed to remain stable with all capacitive loads-including zero capacitance-and no external capacitor is needed for proper operation. This feature simplifies PCB layout, reduces BOM count, and improves reliability in compact or high-reliability applications. The LM4041BIDBZR datasheet states this capability applies across its full operating current range (45 μA to 12 mA).
What is the minimum cathode current required for LM4041BIDBZR to regulate properly?
The LM4041BIDBZR requires a minimum cathode current of 45 μA (typical) to maintain regulation, with a maximum of 80 μA across the full temperature range (–40°C to +85°C). This ultra-low minimum current enables use in micropower applications such as battery-backed sensors and energy-harvesting systems. The LM4041BIDBZR electrical characteristics table specifies this value under "IZ,min" for the B-grade industrial-temperature version.
How is the LM4041BIDBZR pinout configured in the SOT-23-3 (DBZ) package?
In the SOT-23-3 DBZ package, LM4041BIDBZR has Cathode on Pin 1, Anode on Pin 2, and NC (no-connect) on Pin 3. Pin 3 must either float or be tied to Pin 2 (Anode) to prevent parasitic conduction and reduce EMI sensitivity. This pin configuration is distinct from adjustable versions and is confirmed in the LM4041BIDBZR mechanical drawings and pin-function tables in the official TI datasheet.
What is the temperature coefficient and noise performance of LM4041BIDBZR?
The LM4041BIDBZR has a maximum average temperature coefficient of 100 ppm/°C over –40°C to +85°C and delivers 20 μVRMS wideband noise (10 Hz to 10 kHz). These values are measured at 100 μA cathode current and 25°C, and both parameters are fully characterized and guaranteed for the B-grade fixed-output variant. The LM4041BIDBZR datasheet lists these figures in Sections 5.4 and 5.5 under "αVZ" and "eN", respectively.
LM4041BIDBZR 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:
- ±0.2%
- Temperature Coefficient:
- 100ppm/°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
LM4041BIDBZR FAQ
1.How can I place an order for LM4041BIDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041BIDBZR 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 LM4041BIDBZR reliable?
The price and inventory of LM4041BIDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041BIDBZR is usually 5 days.
3.What payment methods are accepted for LM4041BIDBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041BIDBZR transactions.
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4.How is shipping managed for LM4041BIDBZR?
LM4041BIDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041BIDBZR 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 LM4041BIDBZR?
For technical support, including LM4041BIDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041BIDBZR requirements.
6.How does Aetrix verify that LM4041BIDBZR is sourced from the original manufacturer or authorized distributors?
All LM4041BIDBZR 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 LM4041BIDBZR meets industry standards.
7.What is the process for return or replacement of LM4041BIDBZR?
All LM4041BIDBZR units undergo pre-shipment inspection (PSI). If there is an issue with LM4041BIDBZR, 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 LM4041BIDBZR part is unused and in its original packaging.
Return procedure for LM4041BIDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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