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Texas Instruments LM4041D12QDBZR
- Part No.:
- LM4041D12QDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041D12QDBZR.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,850
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Product details
Overview
LM4041D12QDBZR 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 operation over –40°C to +125°C. It delivers stable regulation in low-current, space-constrained applications such as battery-powered sensor nodes and automotive power-supply monitors.
For engineers reviewing the LM4041D12QDBZR datasheet, LM4041D12QDBZR pinout, LM4041D12QDBZR application, or LM4041D12QDBZR equivalent, key selection criteria include guaranteed operation at 45 μA minimum cathode current, 20 μVRMS wideband noise, stability with all capacitive loads, and SOT-23-3 packaging for high-density PCB layouts.
Technical Context
The LM4041D12QDBZR implements a Zener-based shunt reference architecture trimmed via Zener-zap during wafer sort to achieve D-grade accuracy. Its internal structure requires no external capacitor for stability and maintains low dynamic impedance (<2 Ω typical) across 45 μA–12 mA cathode current range.
Designed for extended-temperature automotive and industrial use, it features a dedicated cathode-anode configuration (no feedback pin), operates without load current dependency on reference accuracy, and exhibits monotonic reverse breakdown behavior up to 15 V cathode voltage.
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 divider redesign. |
| Initial Tolerance | ±1.0% max at 25°C (D grade); supports cost-sensitive designs where tighter tolerances are unnecessary. |
| Temp Coefficient | 150 ppm/°C max over –40°C to +125°C; ensures <±12.9 mV drift across full operating range. |
| Min Cathode Current | 45 μA typical; allows ultra-low-power operation in energy-harvesting or coin-cell systems. |
| Output Noise | 20 μVRMS (10 Hz–10 kHz); suitable for high-resolution ADC biasing and precision instrumentation front-ends. |
| Dynamic Impedance | ≤2 Ω (full temp range); minimizes output voltage shift under varying load or supply ripple conditions. |
| Max Cathode Voltage | 15 V absolute maximum; permits use in 12 V automotive and industrial bus monitoring circuits. |
Pinout & Package
LM4041D12QDBZR uses the SOT-23-3 (DBZ) package: 2.92 mm × 1.3 mm × 1.02 mm, surface-mount, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Cathode | Shunt current sink and output node | Connects to regulated voltage rail; carries total current (load + reference bias); must be decoupled locally if high-frequency noise rejection is required. |
| 2 - Anode | Reference ground reference | Typically connected to system ground; forms the return path for cathode current; floating anode invalidates regulation. |
| 3 - NC | No-connect terminal | Internally unconnected; must remain floating or tied to anode per TI ESD guidance; not usable as feedback or trim point. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates stably with any capacitive load (0–∞), eliminating need for output bypass capacitor and reducing BOM count. |
| Extended temperature range | Qualified from –40°C to +125°C (Q grade), enabling use in under-hood automotive and industrial control modules. |
| Low quiescent current | 45 μA typical minimum cathode current supports >10-year battery life in always-on IoT sensors. |
| High ESD robustness | ±2000 V HBM rating protects against handling damage during automated assembly and field service. |
| Long-term stability | 120 ppm drift after 1000 hours at 25°C ensures calibration retention in metering and test equipment. |
Applications
| Automotive Power-Supply Monitor | Industrial Data-Acquisition Front-End |
|---|---|
Use Scenario: Monitoring 12 V battery rail voltage in engine control units with microcontroller ADC input. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for ratiometric ADC conversion of sensed battery voltage. Use Value: Enables accurate voltage measurement across –40°C to +125°C ambient without calibration drift or external compensation. | Use Scenario: Biasing precision op-amps and ADCs in modular PLC analog input modules. IC Role / Device Role / Timing Role: Supplies low-noise, low-drift reference voltage for 16-bit SAR ADC reference inputs. Use Value: 20 μVRMS noise and 150 ppm/°C TC ensure ≤0.01% measurement error over industrial temperature range. |
| Battery-Powered Sensor Node | Energy Meter Reference Subsystem |
Use Scenario: Powering ultra-low-power environmental sensor clusters powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Shunt regulator establishing precise 1.225 V rail for MCU, RF transceiver, and sensor ICs. Use Value: 45 μA min cathode current allows operation down to 2.0 V supply, extending usable battery life by >30% vs. higher-IQ references. | Use Scenario: Providing reference for metrology-grade polyphase energy meter ASICs. IC Role / Device Role / Timing Role: High-stability shunt reference for anti-tampering voltage monitoring and ADC calibration. Use Value: 120 ppm long-term drift and ±1.0% initial tolerance meet IEC 62053-21 Class 0.2 accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040D12IDBZR | Same 1.225 V, D grade, SOT-23-3, but rated only to +85°C (I grade); 100 ppm/°C TC vs. 150 ppm/°C. | Suitable for commercial/industrial environments without extended-temperature requirement. | Select when ambient does not exceed 85°C and lower TC is preferred; not qualified for automotive under-hood use. |
| MAX6008AEUR+T | 1.225 V, ±0.2% initial accuracy (A grade), 75 ppm/°C TC, SOT-23-3, but 60 μA min cathode current. | Better accuracy and TC, but higher minimum current limits use in sub-50 μA systems. | Choose for higher-precision, lower-drift needs where 15 μA extra bias current is acceptable. |
Compared with LM4040D12IDBZR, LM4041D12QDBZR trades 50 ppm/°C higher TC for +40°C extended operating range and identical D-grade tolerance; versus MAX6008AEUR+T, it offers 15 μA lower minimum current at the cost of ±0.8% wider initial tolerance and +75 ppm/°C higher TC.
Availability
LM4041D12QDBZR is available at Aetrix Electronics and suitable for automotive power-supply monitors, industrial data-acquisition systems, and battery-powered sensor nodes requiring stable component supply across extended temperature ranges.
Supply support for LM4041D12QDBZR 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 over 50 years of innovation in precision analog ICs.
The LM4041 product line delivers micropower shunt voltage references optimized for space-constrained, low-current applications demanding high accuracy and extended-temperature reliability-especially in automotive, industrial, and portable instrumentation.
FAQ
What is the operating temperature range of the LM4041D12QDBZR?
The LM4041D12QDBZR is characterized for operation from –40°C to +125°C, meeting the extended-temperature "Q" grade specification. This makes it suitable for under-hood automotive applications and harsh industrial environments where standard industrial-grade (–40°C to +85°C) references would fail.
Does the LM4041D12QDBZR require an output capacitor for stability?
No, the LM4041D12QDBZR is inherently stable with all capacitive loads and does not require an output capacitor between cathode and anode. This eliminates a common BOM item and simplifies layout-though a local 100 nF ceramic capacitor may still be added for high-frequency noise suppression without affecting stability.
What is the minimum cathode current needed for regulation in the LM4041D12QDBZR?
The LM4041D12QDBZR requires a minimum cathode current of 45 μA (typical) to maintain regulation. At temperatures up to +125°C, the maximum specified minimum is 80 μA. Designers must ensure the series resistor supplies sufficient current under worst-case low-voltage, high-temperature conditions.
How does the LM4041D12QDBZR differ from the adjustable version of the LM4041?
The LM4041D12QDBZR is the fixed 1.225 V variant and has no feedback (FB) pin-pins are Cathode, Anode, and NC. The adjustable versions (e.g., LM4041DQ) include a dedicated FB pin and require an external resistor divider to set output voltages from 1.225 V to 10 V, adding design complexity but greater flexibility.
Is the LM4041D12QDBZR pin-compatible with other LM4041 variants in SOT-23-3?
Yes, all LM4041 variants in the DBZ (SOT-23-3) package-including A/B/C/D grades and I/Q temperature versions-share identical pinout: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC. This allows drop-in replacement across grades and temperature ratings without PCB changes, provided thermal and accuracy requirements are met.
LM4041D12QDBZR 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041D12QDBZR FAQ
1.How can I place an order for LM4041D12QDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041D12QDBZR 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 LM4041D12QDBZR reliable?
The price and inventory of LM4041D12QDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041D12QDBZR is usually 5 days.
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Once your LM4041D12QDBZR 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 LM4041D12QDBZR?
For technical support, including LM4041D12QDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041D12QDBZR requirements.
6.How does Aetrix verify that LM4041D12QDBZR is sourced from the original manufacturer or authorized distributors?
All LM4041D12QDBZR 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 LM4041D12QDBZR meets industry standards.
7.What is the process for return or replacement of LM4041D12QDBZR?
All LM4041D12QDBZR units undergo pre-shipment inspection (PSI). If there is an issue with LM4041D12QDBZR, 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 LM4041D12QDBZR part is unused and in its original packaging.
Return procedure for LM4041D12QDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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