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Texas Instruments LM4041CIDBZR
- Part No.:
- LM4041CIDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CIDBZR.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,819
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Product details
Overview
LM4041CIDBZR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225 V output, ±0.5% initial tolerance (C 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 voltage reference in high-accuracy analog signal chains and portable power monitoring circuits.
For engineers reviewing the LM4041CIDBZR datasheet, LM4041CIDBZR pinout, LM4041CIDBZR application, or LM4041CIDBZR equivalent, key selection criteria include its SOT-23-3 package, industrial temperature range (–40°C to 85°C), no-output-capacitor stability, and compatibility with capacitive loads in space-constrained data acquisition and battery-powered systems.
Technical Context
The LM4041CIDBZR implements a Zener-based shunt reference architecture trimmed via fuse and Zener-zap during wafer sort to achieve ±0.5% output tolerance at 25°C. Its dynamic impedance remains below 1.5 Ω at 1 mA, enabling stable regulation across load and supply variations without external compensation.
It operates as a two-terminal device (anode grounded, cathode supplying reference voltage) with no feedback pin required - unlike the adjustable LM4041xI variants. The DBZ package uses pins 1 (cathode), 2 (anode), and 3 (NC, must float or tie to anode), eliminating configuration complexity for fixed-voltage use cases.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; enables direct replacement of legacy 1.2 V references with tighter accuracy. |
| Initial Tolerance | ±0.5% max at 25°C (C grade); reduces calibration burden in precision ADC/DAC biasing. |
| Temp Coefficient | 100 ppm/°C max over –40°C to 85°C; ensures ≤0.85 mV drift across full industrial range. |
| Output Noise | 20 μVRMS (10 Hz–10 kHz); supports 16-bit+ resolution in low-noise sensor front-ends. |
| Operating Current | 45 μA min to 12 mA max cathode current; allows ultra-low-power sleep modes and robust overload handling. |
| Dynamic Impedance | ≤1.5 Ω at 1 mA; maintains regulation stability under fast load transients in power-supply monitors. |
| Capacitive Load Stability | Stable with all capacitive loads; eliminates need for output capacitor in PCB layout. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.6 mm × 1.3 mm body, surface-mount, RoHS-compliant, tape-and-reel packaging (3000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Cathode | Shunt current path and output node | Connects to supply rail via series resistor; delivers regulated 1.225 V referenced to ground. |
| 2 - Anode | Reference ground terminal | Must be connected directly to system ground; forms return path for cathode current. |
| 3 - NC | No-connect terminal | Must remain unconnected or tied to Pin 2 (anode); floating NC prevents EMI coupling in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor operation | Eliminates BOM cost and board area for bypass caps while maintaining stability across all load capacitances. |
| Micropower startup | 45 μA minimum cathode current enables use in energy-harvesting and coin-cell applications. |
| Low thermal drift | 100 ppm/°C max TC ensures <±10 mV total drift over –40°C to 85°C, critical for field-deployed instrumentation. |
| High ESD robustness | ±2000 V HBM rating protects against assembly-line and end-user handling damage. |
| Wide current range | 12 mA max cathode current supports both low-power sensing and higher-current reference buffering. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution ADC biasing in portable multimeters and environmental sensors. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for SAR ADC internal scaling and offset calibration. Use Value: Enables 16-bit effective resolution by limiting reference-induced INL error to <0.008% FS. | Use Scenario: Undervoltage lockout and rail margining in telecom DC-DC modules. IC Role / Device Role / Timing Role: Shunt reference in comparator-based voltage supervision circuit with hysteresis. Use Value: Delivers ±0.5% trip-point accuracy across temperature, reducing false fault triggers by >90% vs. resistor-divider solutions. |
| Process Control Transmitters | Battery-Powered Equipment |
Use Scenario: 4–20 mA loop transmitter with microcontroller-based current regulation. IC Role / Device Role / Timing Role: Precision voltage setpoint for DAC-controlled current source amplifier. Use Value: Maintains <±0.1% span accuracy over 10-year field life due to 120 ppm long-term stability. | Use Scenario: Low-power gas sensor node powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Reference for analog front-end conditioning and ADC conversion. Use Value: Draws only 45 μA quiescent current, extending battery life to >5 years in periodic wake-up mode. |
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 TC (A grade) | Requires external resistor divider for 1.225 V; unsuitable for ultra-low-IQ designs | Select when higher output voltage or tighter TC is prioritized over micropower operation. |
| REF3012AIDBZR | 1.2 V output; 0.2% initial tolerance; 50 ppm/°C TC; 50 μA typical IQ; series topology | Three-terminal device requiring input/output decoupling; higher dropout sensitivity | Choose for lower noise (12 μVRMS) and better TC where board space permits series regulator layout. |
Compared with TL431ACDBZR and REF3012AIDBZR, the LM4041CIDBZR offers the lowest minimum operating current (45 μA), smallest footprint (SOT-23-3), and simplest two-terminal interface - making it optimal for size- and power-constrained shunt reference applications where 1.225 V output is required.
Availability
LM4041CIDBZR is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and battery-powered equipment requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for LM4041CIDBZR 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 for industrial, automotive, and consumer markets.
The LM4041 product line delivers precision shunt voltage references optimized for micropower, low-noise, and wide-current-range operation in portable, instrumentation, and process-control applications.
FAQ
What is the output voltage tolerance of the LM4041CIDBZR over temperature?
The LM4041CIDBZR has a maximum initial tolerance of ±0.5% at 25°C and maintains ≤±0.5% full-range tolerance over –40°C to 85°C for the C grade. Its 100 ppm/°C max temperature coefficient contributes ≤±0.0425% additional drift across the full range, resulting in verified total output variation within ±0.54% in production units.
Can the LM4041CIDBZR operate without an output capacitor?
Yes, the LM4041CIDBZR is explicitly designed to be stable with all capacitive loads and requires no output capacitor for proper operation. This eliminates risk of oscillation and simplifies layout - especially valuable in high-density PCBs where capacitor placement is constrained.
What is the minimum cathode current needed for regulation in the LM4041CIDBZR?
The LM4041CIDBZR requires a minimum cathode current of 45 μA (typical) and 80 μA (max over temperature) to maintain regulation. Below this threshold, output voltage deviates from specification; design must ensure RS resistor sizing guarantees ≥80 μA under worst-case low-VS/high-IL conditions.
How does the LM4041CIDBZR differ from adjustable LM4041 variants?
The LM4041CIDBZR is a fixed 1.225 V version with no feedback (FB) pin; it uses only cathode and anode terminals. Adjustable variants (e.g., LM4041BIDBZR) include a third FB pin and require external resistors to set output between 1.225 V and 10 V - adding complexity but enabling flexible voltage scaling not supported by LM4041CIDBZR.
Is the LM4041CIDBZR suitable for automotive applications?
The LM4041CIDBZR is rated for industrial temperature (–40°C to 85°C) and is not AEC-Q200 qualified. For automotive applications requiring extended temperature (–40°C to 125°C) or qualification, TI's LM4041C12Q (DCK package) or LM4041D12Q should be selected instead of LM4041CIDBZR.
LM4041CIDBZR 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:
- ±0.5%
- 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
LM4041CIDBZR FAQ
1.How can I place an order for LM4041CIDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CIDBZR 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 LM4041CIDBZR reliable?
The price and inventory of LM4041CIDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CIDBZR is usually 5 days.
3.What payment methods are accepted for LM4041CIDBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CIDBZR transactions.
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4.How is shipping managed for LM4041CIDBZR?
LM4041CIDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CIDBZR 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 LM4041CIDBZR?
For technical support, including LM4041CIDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CIDBZR requirements.
6.How does Aetrix verify that LM4041CIDBZR is sourced from the original manufacturer or authorized distributors?
All LM4041CIDBZR 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 LM4041CIDBZR meets industry standards.
7.What is the process for return or replacement of LM4041CIDBZR?
All LM4041CIDBZR units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CIDBZR, 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 LM4041CIDBZR part is unused and in its original packaging.
Return procedure for LM4041CIDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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