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Texas Instruments LM4041B12IDBZR
- Part No.:
- LM4041B12IDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041B12IDBZR.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LM4041B12IDBZR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225 V output, ±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 - deployed in high-accuracy data-acquisition systems and low-power supply monitors.
For engineers reviewing the LM4041B12IDBZR datasheet, LM4041B12IDBZR pinout, LM4041B12IDBZR application, or LM4041B12IDBZR equivalent, key selection criteria include guaranteed 1.225 V output accuracy over –40°C to +85°C, no-output-capacitor stability, SC-70/SOT-23 package compatibility, and cathode current regulation down to 45 μA for battery-powered instrumentation.
Technical Context
The LM4041B12IDBZR implements a Zener-based shunt reference architecture trimmed via Zener-zap during wafer sort to achieve ±0.2% output tolerance at 25°C. It operates as a two-terminal device (anode grounded, cathode supplying regulated voltage) with no internal feedback loop or external resistor divider required for the fixed 1.225 V version.
Its dynamic impedance remains ≤1.5 Ω at 1 mA, enabling stable regulation under varying load conditions, while its low 20 μVRMS noise (10 Hz–10 kHz) and 100 ppm/°C tempco support precision ADC biasing and sensor excitation in industrial and automotive environments.
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% max at 25°C (B grade); ensures system-level calibration accuracy without post-manufacture trimming. |
| Tempco | ≤100 ppm/°C over –40°C to +85°C; maintains <±1.2 mV drift across full industrial temperature range. |
| Operating Current | 45 μA (min) to 12 mA (max); supports ultra-low-power sensor nodes and high-current precision DAC references. |
| Output Noise | 20 μVRMS (10 Hz–10 kHz); avoids quantization noise floor elevation in 16-bit+ data converters. |
| Dynamic Impedance | ≤1.5 Ω at 1 mA; minimizes output voltage shift under fast load transients in closed-loop power monitoring. |
| Capacitive Load Stability | Stable with all capacitive loads; eliminates need for output bypass capacitor in space-constrained PCB layouts. |
Pinout & Package
SOT-23-3 (DBZ) package: compact 2.92 mm × 1.3 mm surface-mount outline with gull-wing leads, JEDEC MO-178 compliant, rated for reflow up to 260°C (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink and output node | Connects to supply rail via series resistor; delivers regulated 1.225 V referenced to anode ground. |
| Anode (Pin 2) | Reference ground terminal | Must be connected directly to system ground; forms return path for cathode current and defines output voltage reference point. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to anode per TI ESD guidance in high-noise environments. |
Key Features
| Feature | Design Value |
|---|---|
| Trimmed Zener core | Wafer-sort fuse/Zener-zap trimming achieves ±0.2% tolerance without post-package adjustment. |
| Zero-output-capacitor operation | Eliminates BOM cost and layout area for bypass caps while maintaining phase margin >45° across 1 pF–10 μF loads. |
| Micropower startup | Regulates stably at 45 μA cathode current - suitable for energy-harvesting and coin-cell applications. |
| Industrial temperature range | Specified performance from –40°C to +85°C ambient; validated for use in motor control and PLC analog I/O modules. |
| ESD robustness | ±2000 V HBM rating protects against handling damage during automated assembly and field service. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution 24-bit sigma-delta ADC front-end requiring stable reference for thermocouple or RTD measurement. IC Role / Device Role / Timing Role: Shunt voltage reference providing 1.225 V excitation and conversion reference with <±2.5 μV total drift over temperature. Use Value: Enables ±0.005% full-scale measurement accuracy without recalibration across –40°C to +85°C. | Use Scenario: Real-time monitoring of 3.3 V and 5 V rails in industrial programmable logic controllers. IC Role / Device Role / Timing Role: Precision shunt reference feeding comparator input to detect undervoltage/overvoltage faults. Use Value: Guarantees trip-point accuracy within ±6.6 mV (±0.2% of 3.3 V) across operating temperature and line regulation. |
| Instrumentation & Test Equipment | Battery-Powered Equipment |
Use Scenario: Portable multimeter reference stage where size, power, and long-term stability are critical. IC Role / Device Role / Timing Role: Fixed-voltage shunt reference replacing bulkier bandgap ICs in handheld DMM analog signal chain. Use Value: Delivers 120 ppm long-term stability (1000 h) and 20 μVRMS noise in 2.92 mm × 1.3 mm SOT-23 footprint. | Use Scenario: Low-power gas sensor node powered by CR2032 coin cell with 10-year shelf life requirement. IC Role / Device Role / Timing Role: Micropower shunt reference biasing electrochemical sensor amplifier and ADC reference. Use Value: Draws only 45 μA minimum cathode current - extends battery life beyond 5 years at 1 sample/sec duty cycle. |
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 external resistors; 2% initial tolerance; higher 200 ppm/°C tempco. | Used where programmable threshold or higher output voltage is needed; less suitable for fixed 1.225 V precision sensing. | Select TL431ACDBVR only when adjustable output or higher voltage is required - not a drop-in replacement. |
| REF3012AIDBZR | Series reference (not shunt); 1.2 V output; ±0.2% tolerance; 50 ppm/°C tempco; requires input-to-output headroom. | Preferred in low-noise, low-dropout supply domains where load regulation and PSRR matter more than shunt simplicity. | Choose REF3012AIDBZR when supply headroom allows and superior PSRR/noise performance justifies added complexity. |
Compared with TL431ACDBVR and REF3012AIDBZR, the LM4041B12IDBZR uniquely combines fixed 1.225 V output, shunt topology (no headroom needed), micropower operation (45 μA), and SOT-23-3 footprint - making it optimal for space- and power-constrained precision analog designs where simplicity and guaranteed low-drift performance are mandatory.
Availability
LM4041B12IDBZR 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 parametric consistency.
Supply support for LM4041B12IDBZR 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 and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LM4041 product line delivers precision shunt voltage references optimized for micropower, low-noise, and wide-cathode-current-range operation in space-constrained portable and industrial instrumentation.
FAQ
What is the output voltage tolerance of the LM4041B12IDBZR at 25°C?
The LM4041B12IDBZR has a maximum initial output voltage tolerance of ±0.2% at 25°C, corresponding to ±2.45 mV around the 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 conditions.
Does the LM4041B12IDBZR require an output capacitor for stability?
No, the LM4041B12IDBZR does not require an output capacitor for stability. Its internal design ensures unconditional stability with all capacitive loads from 0 pF to ≥10 μF, eliminating the need for external bypass components and simplifying layout in tight-space applications.
What is the minimum cathode current needed for regulation in the LM4041B12IDBZR?
The LM4041B12IDBZR requires a minimum cathode current of 45 μA (typical) to maintain regulation, with a maximum specified value of 80 μA across the full –40°C to +85°C temperature range. This ultra-low current enables operation in energy-harvesting and long-life battery systems.
Which package type is used for the LM4041B12IDBZR?
The LM4041B12IDBZR uses the SOT-23-3 (DBZ) package: a 3-pin, gull-wing surface-mount outline measuring 2.92 mm × 1.3 mm, with MSL Level-1 rating for moisture sensitivity and compatibility with standard 260°C lead-free reflow profiles.
How does the LM4041B12IDBZR compare to the adjustable LM4041 variants?
The LM4041B12IDBZR is a fixed-output variant delivering precisely 1.225 V without external resistors, whereas adjustable versions (e.g., LM4041BI) require a feedback divider and offer 1.225 V–10 V programmability. The fixed version provides tighter initial tolerance, lower noise, and simpler implementation - ideal when 1.225 V is the exact required reference.
LM4041B12IDBZR 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:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.225V
- Voltage - Output (Max):
- -
- 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
LM4041B12IDBZR FAQ
1.How can I place an order for LM4041B12IDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041B12IDBZR 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 LM4041B12IDBZR reliable?
The price and inventory of LM4041B12IDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041B12IDBZR is usually 5 days.
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Once your LM4041B12IDBZR 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 LM4041B12IDBZR?
For technical support, including LM4041B12IDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041B12IDBZR requirements.
6.How does Aetrix verify that LM4041B12IDBZR is sourced from the original manufacturer or authorized distributors?
All LM4041B12IDBZR 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 LM4041B12IDBZR meets industry standards.
7.What is the process for return or replacement of LM4041B12IDBZR?
All LM4041B12IDBZR units undergo pre-shipment inspection (PSI). If there is an issue with LM4041B12IDBZR, 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 LM4041B12IDBZR part is unused and in its original packaging.
Return procedure for LM4041B12IDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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