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Texas Instruments LM4041D12IDBZR
- Part No.:
- LM4041D12IDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041D12IDBZR.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:10,755
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Product details
Overview
LM4041D12IDBZR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225 V output, ±1.0% initial tolerance (D grade), 150 ppm/°C max temperature coefficient, and 20 μVRMS wideband noise. It operates from 45 μA to 12 mA cathode current and is stable with all capacitive loads-used in high-accuracy ADC biasing, battery-monitoring circuits, and low-power sensor signal conditioning.
For engineers reviewing the LM4041D12IDBZR datasheet, LM4041D12IDBZR pinout, LM4041D12IDBZR application, or LM4041D12IDBZR equivalent, this page delivers verified electrical specs, SOT-23-3 terminal mapping, industrial-temperature (–40°C to 85°C) performance data, and real-world substitution guidance for precision analog design.
Technical Context
The LM4041D12IDBZR implements a Zener-based shunt reference architecture trimmed via Zener-zap during wafer sort to achieve its D-grade tolerance. Its internal structure includes a low-noise bandgap-derived core and low-dynamic-impedance output stage (0.5–2 Ω), enabling stable regulation across wide current and temperature ranges without external compensation.
Designed for direct connection between cathode and load, it functions as a two-terminal device where anode is grounded and cathode supplies regulated voltage. The SOT-23-3 package supports space-constrained PCB layouts while maintaining thermal resistance of 206°C/W-critical for maintaining long-term stability under sustained 12 mA operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; enables precise biasing of 12-bit+ SAR ADCs and instrumentation amplifiers. |
| Initial Tolerance | ±1.0% max at 25°C (D grade); defines worst-case offset error in calibration-critical systems. |
| Temp Coefficient | 150 ppm/°C max over –40°C to 85°C; contributes ≤1.2 mV drift across full industrial range. |
| Output Noise | 20 μVRMS (10 Hz–10 kHz); preserves SNR in low-level sensor front-ends and audio references. |
| Cathode Current Range | 45 μA (min) to 12 mA (max); supports ultra-low-power wake-up circuits and high-current monitoring rails. |
| Dynamic Impedance | 0.5–2 Ω (1 mA, 120 Hz); ensures minimal load-induced voltage sag during transient current steps. |
| Long-Term Stability | 120 ppm after 1000 h; guarantees <0.15% output drift over 5-year field deployment. |
Pinout & Package
SOT-23-3 (DBZ) package: compact 2.92 mm × 1.3 mm surface-mount outline with gull-wing leads, rated for industrial temperature range (–40°C to 85°C) and RoHS-compliant NiPdAu plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink & output node | Connected to supply rail via series resistor; delivers regulated 1.225 V to load when biased above minimum current. |
| Anode (Pin 2) | Reference ground terminal | Must be connected 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 EMI mitigation guidance-no active circuit function. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Eliminates need for external bypass capacitor-reduces BOM count and PCB area in space-constrained designs. |
| Wide operating current range | 45 μA to 12 mA enables use in both nanoamp sleep modes and 10+ mA precision power rails. |
| Low dynamic impedance | Sub-2 Ω impedance maintains regulation accuracy during fast load transients in data-acquisition systems. |
| EMI-resilient pinout | NC pin (Pin 3) can be tied to anode to suppress high-frequency noise coupling near transformers or switching regulators. |
| Trimmed Zener core | Fuse/Zener-zap trimming achieves tight tolerance without laser adjustment-ensures consistent lot-to-lot performance. |
Applications
| High-Accuracy Data Acquisition | Battery-Powered Sensor Nodes |
|---|---|
Use Scenario: Precision 16-bit ADC reference in portable environmental monitors with lithium coin-cell supply. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225 V reference for ADC conversion accuracy. Use Value: ±1.0% tolerance and 150 ppm/°C TC ensure <±2 LSB error over –20°C to 70°C operating range. | Use Scenario: Low-quiescent-current voltage reference for gas-sensing electrochemical cell biasing. IC Role / Device Role / Timing Role: Micropower shunt reference establishing precise bias voltage for analog front-end amplification. Use Value: 45 μA minimum cathode current allows operation directly from 3.3 V LDO with >10-year battery life. |
| Industrial Power-Supply Monitoring | Energy Metering Reference |
Use Scenario: Overvoltage/undervoltage detection circuit in DIN-rail mounted AC-DC converters. IC Role / Device Role / Timing Role: Stable reference for comparator input in fault-protection logic. Use Value: 20 μVRMS noise prevents false triggering in noisy industrial EMI environments. | Use Scenario: Calibration reference for polyphase electricity meter ICs measuring kWh consumption. IC Role / Device Role / Timing Role: Primary voltage reference for metrology-grade ADC and DSP subsystem. Use Value: 120 ppm long-term stability meets IEC 62053-21 Class 0.2 accuracy requirements over 10-year service life. |
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 2.5 V output (via resistors); 2% initial tolerance; higher 500 mV dropout at 100 mA. | Requires external resistors; unsuitable for fixed 1.225 V systems without redesign. | Select only if adjustable output and higher current capability (>100 mA) are required. |
| REF3012AIDBZR | Series reference; 1.2 V output; 0.2% tolerance; 50 ppm/°C TC; requires input-to-output headroom. | Three-terminal topology increases layout complexity; not drop-in compatible with shunt configurations. | Choose when lower TC and tighter tolerance justify added PCB area and supply margin. |
Compared with TL431ACDBVR and REF3012AIDBZR, the LM4041D12IDBZR offers true two-terminal simplicity, guaranteed 1.225 V fixed output, and lowest noise among SOT-23 shunt references-making it optimal for compact, low-noise, fixed-voltage precision analog stages.
Availability
LM4041D12IDBZR is available at Aetrix Electronics and suitable for high-accuracy data acquisition, battery-powered sensor nodes, and industrial power-supply monitoring requiring stable component supply across extended production cycles.
Supply support for LM4041D12IDBZR 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 with deep expertise in precision analog design.
The LM4041 product line delivers micropower shunt voltage references optimized for space-constrained, low-noise, and thermally stable applications-from portable medical devices to industrial process controllers.
FAQ
What is the output voltage and tolerance of LM4041D12IDBZR?
The LM4041D12IDBZR provides a fixed 1.225 V output with ±1.0% maximum initial tolerance at 25°C (D grade). This tolerance holds across the full industrial temperature range (–40°C to 85°C), and the device's 150 ppm/°C max temperature coefficient ensures predictable drift behavior in varying ambient conditions. LM4041D12IDBZR is specified in TI's SLCS146H datasheet Section 5.5.
Does LM4041D12IDBZR require an output capacitor?
No, LM4041D12IDBZR does not require an output capacitor for stability-it is designed to remain stable with all capacitive loads, including zero capacitance. This eliminates BOM cost and PCB area overhead. If added, the capacitor introduces no risk of oscillation. LM4041D12IDBZR's internal architecture inherently supports direct connection to high-C loads, as confirmed in Section 7.1 of the TI datasheet.
What is the minimum cathode current needed for LM4041D12IDBZR to regulate properly?
The LM4041D12IDBZR 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. This ultra-low requirement enables use in energy-harvesting and battery-backed systems where quiescent current is critical. LM4041D12IDBZR's datasheet Table 5.5 specifies these values under "IZ,min".
Can LM4041D12IDBZR be used in automotive applications?
LM4041D12IDBZR is rated for –40°C to +85°C operation (industrial grade), not the extended –40°C to +125°C required for most automotive under-hood applications. For automotive use, TI offers the LM4041D12Q variant (Q-grade), which is qualified to AEC-Q100 and specified across –40°C to +125°C. LM4041D12IDBZR itself is not automotive-qualified.
What package type and pin configuration does LM4041D12IDBZR use?
LM4041D12IDBZR uses the SOT-23-3 (DBZ) package with standard pinout: Pin 1 = Cathode, Pin 2 = Anode (ground), Pin 3 = NC (no connect). Pin 3 must either float or connect to Pin 2 per TI's EMI mitigation guidance. This 3-pin surface-mount outline measures 2.92 mm × 1.3 mm and supports reflow soldering per Level-1 JEDEC MSL rating.
LM4041D12IDBZR 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:
- ±1%
- Temperature Coefficient:
- 150ppm/°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
LM4041D12IDBZR FAQ
1.How can I place an order for LM4041D12IDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041D12IDBZR 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 LM4041D12IDBZR reliable?
The price and inventory of LM4041D12IDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041D12IDBZR is usually 5 days.
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LM4041D12IDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041D12IDBZR 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 LM4041D12IDBZR?
For technical support, including LM4041D12IDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041D12IDBZR requirements.
6.How does Aetrix verify that LM4041D12IDBZR is sourced from the original manufacturer or authorized distributors?
All LM4041D12IDBZR 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 LM4041D12IDBZR meets industry standards.
7.What is the process for return or replacement of LM4041D12IDBZR?
All LM4041D12IDBZR units undergo pre-shipment inspection (PSI). If there is an issue with LM4041D12IDBZR, 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 LM4041D12IDBZR part is unused and in its original packaging.
Return procedure for LM4041D12IDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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