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Texas Instruments LM4041BIDBZT
- Part No.:
- LM4041BIDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041BIDBZT.pdf
- Description:
- IC VREF SHUNT ADJ 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:105
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Product details
Overview
LM4041BIDBZT 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, 20 μVRMS wideband noise, and stable operation from 45 μA to 12 mA cathode current. It serves as a compact, low-drift reference in battery-powered instrumentation and power-supply monitoring circuits.
For engineers reviewing the LM4041BIDBZT datasheet, LM4041BIDBZT pinout, LM4041BIDBZT application, or LM4041BIDBZT equivalent, this page provides verified electrical specifications, thermal and noise performance data, SOT-23-3 terminal mapping, industrial-grade (–40°C to +85°C) operating context, and validated alternative options for precision analog design.
Technical Context
The LM4041BIDBZT operates as a two-terminal shunt reference, sinking cathode current to maintain a stable 1.225 V across its terminals. Its Zener-based core uses fuse and Zener-zap trimming during wafer sort to achieve B-grade accuracy, and it requires no external capacitor for stability-even with capacitive loads up to 1 μF.
It features low dynamic impedance (≤1.5 Ω at 1 mA), minimal load regulation error (≤6 mV over 1–12 mA cathode current), and low feedback current (≤100 nA), enabling high-impedance divider networks in adjustable configurations. The device is characterized across –40°C to +85°C and supports both fixed-output and adjustable (via FB pin) topologies.
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 redesign. |
| Initial Tolerance | ±0.2% at 25°C (B grade); ensures ≤2.46 mV absolute error in precision ADC biasing or DAC reference paths. |
| Tempco | Max 100 ppm/°C over –40°C to +85°C; contributes ≤10.3 mV drift across full industrial range-critical for metering accuracy. |
| Noise (10 Hz–10 kHz) | 20 μVRMS; supports 16-bit+ resolution in low-noise data acquisition without additional filtering. |
| Cathode Current Range | 45 μA (typ) to 12 mA; allows ultra-low-power sensor nodes (<50 μA system sleep current) and robust 12 mA load drive capability. |
| Dynamic Impedance | ≤1.5 Ω at 1 mA; maintains <1.5 mV output shift per 1 mA load transients-essential for stable feedback in LDOs or SMPS monitors. |
| Long-Term Stability | 120 ppm after 1000 h; guarantees <0.15 mV drift over 1 year in field-deployed energy meters or process controllers. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.3 mm × 1.02 mm body, surface-mount, RoHS-compliant, moisture sensitivity level 1 (260°C reflow unlimited).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Current sink / output node | Shunt current path; connects to supply rail via series resistor; output voltage appears between Cathode and Anode. |
| Anode (Pin 2) | Reference ground / return path | Typically tied to system ground; forms the 0 V reference point for 1.225 V output; must be low-impedance. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to Anode (Pin 2) in EMI-sensitive environments per TI recommendation. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates stably with any capacitive load (0–1 μF); eliminates BOM cost and layout area for output bypass caps. |
| Micropower operation | 45 μA typical minimum cathode current; enables >10-year battery life in coin-cell–powered IoT sensors. |
| Wide temperature range | Specified from –40°C to +85°C; qualified for industrial control, automotive cabin electronics, and outdoor metering. |
| Low ESD sensitivity | ±2000 V HBM rating; withstands standard handling without special ESD protocols in production assembly. |
| Adjustable option support | FB pin (in SC-70/TO-92 variants) enables 1.225–10 V output via external resistors-same die, scalable design reuse. |
Applications
| Portable Data Loggers | Industrial Power-Supply Monitors |
|---|---|
Use Scenario: Battery-powered environmental sensor nodes logging temperature, humidity, and pressure at 10-second intervals for 5+ years on a single CR2032 cell. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225 V for SAR ADC reference input and microcontroller VREF pin. Use Value: 45 μA min cathode current enables sub-50 μA system sleep current; ±0.2% tolerance ensures <0.5% total measurement error over lifetime. | Use Scenario: Real-time monitoring of 3.3 V and 5 V rails in PLC backplanes, triggering fault alerts when voltage deviates beyond ±1%. IC Role / Device Role / Timing Role: Precision voltage threshold detector feeding comparator inputs in redundant supervision circuits. Use Value: 100 ppm/°C tempco limits drift to <0.85% over –40°C to +85°C ambient, eliminating recalibration in factory-floor deployments. |
| Energy Meter Reference | Audio DAC Biasing |
Use Scenario: Class 0.5 electricity meters measuring active/reactive power using 24-bit sigma-delta ADCs with anti-aliasing filters. IC Role / Device Role / Timing Role: Primary reference for metrology ADC and isolated voltage sensing front-end. Use Value: 20 μVRMS noise ensures <1 LSB noise floor contribution at 24-bit resolution; 120 ppm long-term stability meets IEC 62053-21 calibration retention requirements. | Use Scenario: High-fidelity portable DACs (e.g., USB-C audio dongles) requiring ultra-low-noise analog output stage biasing. IC Role / Device Role / Timing Role: Low-noise reference for op-amp gain-setting networks and headphone amplifier DC offset nulling. Use Value: 20 μVRMS noise avoids audible hiss; SOT-23-3 footprint minimizes PCB area in space-constrained earphone designs. |
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 | 2.495 V fixed output; higher 100 μA min cathode current; 50 ppm/°C tempco (A grade); SO-8 package. | Requires resistor divider for 1.225 V; unsuitable for ultra-low-power systems; better for higher-voltage feedback loops. | Select when 2.5 V reference suffices and board space permits SO-8; avoid where <50 μA sleep current is mandatory. |
| MAX6126AASA+ | 1.25 V output; ±0.06% initial tolerance; 3 ppm/°C tempco; SO-8 package; 350 μA quiescent current. | Higher precision but 8× higher supply current; not micropower; optimized for lab-grade instrumentation, not battery use. | Choose only when sub-10 ppm/°C drift is required and power budget allows >300 μA continuous draw. |
Compared with TL431ACDBZR and MAX6126AASA+, the LM4041BIDBZT uniquely balances micropower operation (45 μA), industrial temperature range, and 1.225 V fixed output in a 3-pin SOT-23-making it optimal for space- and energy-constrained embedded systems where 1.2 V-class references are specified.
Availability
LM4041BIDBZT is available at Aetrix Electronics and suitable for portable data loggers, industrial power-supply monitors, energy metering systems, and precision audio DAC biasing requiring stable component supply across extended product lifecycles.
Supply support for LM4041BIDBZT 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, embedded processing, and connectivity technologies, with decades of leadership in precision reference design.
The LM4041 product line delivers micropower, low-drift shunt references for battery-operated instrumentation, industrial sensing, and energy metering-designed to replace bulkier three-terminal references while maintaining metrology-grade stability.
FAQ
What is the output voltage tolerance of the LM4041BIDBZT at room temperature?
The LM4041BIDBZT has a maximum initial output voltage tolerance of ±0.2% at 25°C, corresponding to ±2.46 mV around its nominal 1.225 V output. This B-grade specification is verified across production lots and is guaranteed in the datasheet's Electrical Characteristics table under LM4041B12I test conditions.
Does the LM4041BIDBZT require an output capacitor for stability?
No, the LM4041BIDBZT does not require an output capacitor for stability. Its internal design ensures unconditional stability with all capacitive loads-including 0 μF-and it remains stable even with up to 1 μF directly across Cathode and Anode, as confirmed in Section 7.1 and Figure 5-7 of the official datasheet.
What is the minimum cathode current needed for the LM4041BIDBZT to regulate properly?
The LM4041BIDBZT requires a minimum cathode current of 45 μA (typical) and 80 μA (maximum over temperature) to maintain regulation within specification. Below this, output voltage may deviate beyond the ±0.2% tolerance band-critical for ultra-low-power wake-up circuits where the LM4041BIDBZT supplies bias to comparators or ADC references.
Can the LM4041BIDBZT be used in automotive applications?
The LM4041BIDBZT is rated for –40°C to +85°C operation and is qualified for industrial applications, but it is not AEC-Q200 qualified. For under-hood automotive use (e.g., engine control), TI recommends the LM4041Q variant (e.g., LM4041B12Q). The LM4041BIDBZT is suitable for cabin electronics, infotainment power monitoring, or ADAS auxiliary modules operating within its temperature range.
How does the LM4041BIDBZT compare to the LM4041AIDBZT in terms of accuracy?
The LM4041BIDBZT offers ±0.2% initial tolerance and 100 ppm/°C max tempco, while the LM4041AIDBZT provides tighter ±0.1% tolerance and same 100 ppm/°C spec. Both share identical package, noise (20 μVRMS), and current range. Choose LM4041AIDBZT only if the additional 0.1% accuracy justifies potential cost or lead-time trade-offs for metrology-critical stages.
LM4041BIDBZT 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
LM4041BIDBZT FAQ
1.How can I place an order for LM4041BIDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041BIDBZT 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 LM4041BIDBZT reliable?
The price and inventory of LM4041BIDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041BIDBZT is usually 5 days.
3.What payment methods are accepted for LM4041BIDBZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041BIDBZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041BIDBZT?
LM4041BIDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041BIDBZT 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 LM4041BIDBZT?
For technical support, including LM4041BIDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041BIDBZT requirements.
6.How does Aetrix verify that LM4041BIDBZT is sourced from the original manufacturer or authorized distributors?
All LM4041BIDBZT 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 LM4041BIDBZT meets industry standards.
7.What is the process for return or replacement of LM4041BIDBZT?
All LM4041BIDBZT units undergo pre-shipment inspection (PSI). If there is an issue with LM4041BIDBZT, 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 LM4041BIDBZT part is unused and in its original packaging.
Return procedure for LM4041BIDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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