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Texas Instruments LM4041BIDBZRG4
- Part No.:
- LM4041BIDBZRG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041BIDBZRG4.pdf
- Description:
- IC VREF SHUNT ADJ 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,788
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Product details
Overview
LM4041BIDBZRG4 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), ideal for high-accuracy analog sensing in portable power monitors.
For engineers reviewing the LM4041BIDBZRG4 datasheet, LM4041BIDBZRG4 pinout, LM4041BIDBZRG4 application, or LM4041BIDBZRG4 equivalent, key selection criteria include output stability under varying load current, low-noise performance in ADC reference paths, compatibility with capacitive loads without external compensation, and thermal drift behavior across –40°C to 85°C ambient conditions.
Technical Context
The LM4041BIDBZRG4 implements a trimmed Zener-based shunt architecture with fuse and Zener-zap wafer-sort trimming to achieve ±0.2% output tolerance. Its dynamic impedance remains ≤1.5 Ω at 1 mA, enabling stable regulation even with fast load transients.
It requires no output capacitor and maintains stability across all capacitive loads due to inherent low-output-impedance design and internal compensation. The device's feedback pin (FB) is absent in the fixed 1.225 V variant (LM4041B12I), confirming its non-adjustable configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; enables direct replacement of legacy bandgap references in 1.2 V–1.25 V precision systems. |
| Initial Tolerance | ±0.2% at 25°C (B grade); ensures ≤2.46 mV absolute error in factory-calibrated measurement chains. |
| Temp Coefficient | Max 100 ppm/°C over –40°C to +85°C; contributes ≤12.25 mV total drift across full industrial range. |
| Noise (10 Hz–10 kHz) | 20 μVRMS; supports 16-bit+ SAR ADCs without added filtering in data-acquisition front-ends. |
| Operating Current | 45 μA (typ) to 12 mA; allows ultra-low-power sensor nodes and high-current reference buffering in same design. |
| Dynamic Impedance | ≤1.5 Ω at 1 mA; minimizes output voltage shift during load steps in closed-loop regulator feedback networks. |
| Long-Term Stability | 120 ppm after 1000 h; critical for metering and calibration equipment requiring multi-year accuracy retention. |
Pinout & Package
SOT-23-3 (DBZ) package: compact 2.92 mm × 1.3 mm surface-mount outline with gull-wing leads, optimized for space-constrained PCB layouts and automated assembly.
| 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 decoupled locally if driving noisy circuits. |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; forms the 1.225 V potential difference with Cathode; parasitic Schottky diode to Pin 3 requires Pin 3 floating or tied to Pin 2. |
| No Connect (Pin 3) | Unused terminal | Internally unconnected; must remain floating or tied to Anode (Pin 2) per TI recommendation to suppress EMI coupling in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates reliably with any capacitive load (0–∞), eliminating need for output bypass caps and simplifying layout in battery-powered designs. |
| Micropower operation | 45 μA typical minimum cathode current enables >10-year operation from coin cells in always-on monitoring applications. |
| Low thermal drift | 100 ppm/°C max TC ensures <0.1% output variation across industrial temperature range-critical for uncalibrated field instruments. |
| High ESD robustness | ±2000 V HBM rating protects against handling damage during manual assembly and board-level testing. |
| Wide current range | Supports both ultra-low-power (μA) sensing and higher-current (mA) reference buffering without external components. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution ADC reference in portable multimeters and environmental sensors. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference voltage for SAR ADC conversion, directly determining full-scale accuracy. Use Value: 20 μVRMS noise and 100 ppm/°C drift ensure ≥16-bit effective resolution without calibration across temperature. | Use Scenario: Input/output voltage supervision in telecom DC-DC modules and server VRMs. IC Role / Device Role / Timing Role: Shunt reference for comparator-based overvoltage/undervoltage detection circuitry. Use Value: ±0.2% tolerance guarantees trip-point accuracy within 2.5 mV, reducing false fault triggers in redundant power systems. |
| Instrumentation & Test Equipment | Battery-Powered Equipment |
Use Scenario: Calibration reference in handheld oscilloscopes and signal generators. IC Role / Device Role / Timing Role: Primary voltage standard for internal DAC/ADC offset and gain trimming routines. Use Value: 120 ppm long-term stability enables 6-month calibration intervals without hardware recalibration. | Use Scenario: Reference for fuel gauging ICs and battery protection circuits in wearables and medical patches. IC Role / Device Role / Timing Role: Low-current shunt reference establishing precise threshold voltages for cell voltage monitoring. Use Value: 45 μA min operating current extends battery life by >30% versus higher-quiescent alternatives in sleep-mode operation. |
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 adjustable output; 2% initial tolerance; higher 0.22 Ω dynamic impedance; requires external resistors for 1.225 V setup. | Not suitable for direct 1.225 V replacement; used where programmability or higher voltage is acceptable. | Select only if adjustable output or higher reference voltage is required; adds design complexity and reduces accuracy vs LM4041BIDBZRG4. |
| MAX6008BAUT+T | 1.25 V fixed output; ±0.25% tolerance; 75 ppm/°C TC; 35 μVRMS noise; SOT-23-3 package. | Higher noise and looser TC limit use in 16-bit+ systems; compatible footprint but not drop-in electrically. | Acceptable for cost-sensitive 12–14-bit applications where 1.25 V is acceptable; verify noise impact on target ADC SNR. |
Compared with TL431ACDBZR and MAX6008BAUT+T, the LM4041BIDBZRG4 delivers tighter initial tolerance, lower noise, and superior thermal stability in a true 1.225 V fixed configuration-making it optimal for high-precision, low-power analog signal chains where reference accuracy directly defines system specification margins.
Availability
LM4041BIDBZRG4 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 traceable sourcing.
Supply support for LM4041BIDBZRG4 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 cost-sensitive, space-constrained applications demanding high initial accuracy, low drift, and micropower operation-particularly in portable instrumentation, energy metering, and industrial process control.
FAQ
What is the output voltage and tolerance of the LM4041BIDBZRG4?
The LM4041BIDBZRG4 provides a fixed 1.225 V output voltage with a maximum initial tolerance of ±0.2% at 25°C (B grade). This tolerance is verified across production lots and applies to the specific LM4041BIDBZRG4 orderable part, ensuring consistent performance in precision analog designs without user trimming.
Does the LM4041BIDBZRG4 require an external output capacitor?
No, the LM4041BIDBZRG4 does not require an external output capacitor for stability. Its internal design ensures unconditional stability with all capacitive loads-from 0 to infinity-eliminating the need for output bypass components and simplifying PCB layout in space-constrained applications.
What is the operating temperature range for the LM4041BIDBZRG4?
The LM4041BIDBZRG4 is characterized for operation across the industrial temperature range of –40°C to +85°C. This range is explicitly specified in TI's official documentation for the LM4041Bx12I family, and the "I" suffix in the part number confirms this temperature grade.
How does the LM4041BIDBZRG4 compare to adjustable versions like LM4041BIDCKR?
The LM4041BIDBZRG4 is a fixed 1.225 V variant in SOT-23-3 package, while LM4041BIDCKR is an adjustable version in SC-70-5 with FB pin. The LM4041BIDBZRG4 lacks the FB pin and cannot be configured for other voltages-its pinout, package, and electrical specs are optimized for simplicity and minimal footprint in dedicated 1.225 V reference roles.
What is the minimum cathode current required for proper regulation of the LM4041BIDBZRG4?
The LM4041BIDBZRG4 requires a minimum cathode current of 45 μA (typical) to maintain regulation. This value is confirmed in TI's LM4041x12I Electrical Characteristics tables and is valid across the full –40°C to +85°C temperature range, enabling reliable operation in ultra-low-power wake-up circuits.
LM4041BIDBZRG4 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:
- 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
LM4041BIDBZRG4 FAQ
1.How can I place an order for LM4041BIDBZRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041BIDBZRG4 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 LM4041BIDBZRG4 reliable?
The price and inventory of LM4041BIDBZRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041BIDBZRG4 is usually 5 days.
3.What payment methods are accepted for LM4041BIDBZRG4?
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4.How is shipping managed for LM4041BIDBZRG4?
LM4041BIDBZRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041BIDBZRG4 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 LM4041BIDBZRG4?
For technical support, including LM4041BIDBZRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041BIDBZRG4 requirements.
6.How does Aetrix verify that LM4041BIDBZRG4 is sourced from the original manufacturer or authorized distributors?
All LM4041BIDBZRG4 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 LM4041BIDBZRG4 meets industry standards.
7.What is the process for return or replacement of LM4041BIDBZRG4?
All LM4041BIDBZRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041BIDBZRG4, 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 LM4041BIDBZRG4 part is unused and in its original packaging.
Return procedure for LM4041BIDBZRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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