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Texas Instruments LM4041DQDBZR
- Part No.:
- LM4041DQDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DQDBZR.pdf
- Description:
- IC VREF SHUNT ADJ 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,970
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Product details
Overview
LM4041DQDBZR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225V output, ±1.0% initial tolerance (D grade), 150ppm/°C max temperature coefficient, 20μVRMS typical noise, and stable operation from 45μA to 12mA cathode current. It operates across –40°C to +125°C and serves as a stable reference in battery-powered instrumentation and automotive power-supply monitors.
For engineers reviewing the LM4041DQDBZR datasheet, LM4041DQDBZR pinout, LM4041DQDBZR application, or LM4041DQDBZR equivalent, key selection factors include its D-grade accuracy, extended-temperature qualification, SOT-23-3 package compatibility, and shunt topology enabling simple two-terminal biasing without external capacitors.
Technical Context
The LM4041DQDBZR implements a Zener-based shunt reference architecture trimmed via Zener-zap during wafer sort to achieve ±1.0% output tolerance at 25°C. Its dynamic impedance remains ≤2Ω at 1mA, supporting low-noise regulation under varying load conditions.
It features an internal feedback node (FB) only in adjustable variants - the LM4041DQDBZR is the fixed-output version, eliminating need for external resistor dividers. The device is characterized for full operation over –40°C to +125°C (Q-grade), with guaranteed performance across its entire cathode current range (45μA–12mA) and reverse breakdown voltage stability up to 15V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225V nominal; enables direct replacement of legacy 1.2V references with tighter tolerance. |
| Initial Tolerance | ±1.0% max at 25°C (D grade); defines worst-case DC error before temperature or aging effects. |
| Temp Coefficient | 150ppm/°C max over –40°C to +125°C; limits drift-induced error to <1.8mV across full range. |
| Output Noise | 20μVRMS typical (10Hz–10kHz); supports high-resolution ADCs and precision analog signal chains. |
| Cathode Current | 45μA min to 12mA max; allows ultra-low-power sensor nodes and robust operation in high-current monitoring. |
| Operating Temp | –40°C to +125°C (Q grade); qualified for under-hood automotive and industrial control environments. |
| Dynamic Impedance | ≤2Ω at 1mA (full temp range); ensures minimal output voltage shift under transient load changes. |
Pinout & Package
SOT-23-3 (DBZ) package: compact 2.92mm × 1.3mm 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; sinks all current not drawn by load; sets output voltage via external series resistor. |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; forms return path for cathode current and establishes 0V reference point. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to Anode (Pin 2) per TI EMI guidance; no functional role in fixed-output operation. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Operates stably with any capacitive load - eliminates BOM cost and layout area for output bypass capacitor. |
| Micropower operation | 45μA minimum cathode current enables >10-year battery life in coin-cell–powered IoT sensors. |
| Extended temperature rating | –40°C to +125°C operation supports automotive engine-control modules and industrial motor drives. |
| Low dynamic impedance | ≤2Ω over full temperature and current range maintains regulation during fast load transients in data-acquisition systems. |
| High ESD robustness | ±2000V HBM rating protects against handling damage during manual assembly and board-level testing. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution 16-bit SAR ADC front-end requiring stable reference for accurate sensor digitization in portable test equipment. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 1.225V基准 for ADC internal conversion ladder and external signal conditioning. Use Value: 20μVRMS noise and 150ppm/°C drift ensure <0.01% measurement error across operating temperature and battery discharge cycles. | Use Scenario: Real-time monitoring of 3.3V/5V/12V rails in telecom power shelves with fault reporting to microcontroller. IC Role / Device Role / Timing Role: Precision shunt element in comparator-based overvoltage/undervoltage detection circuit. Use Value: ±1.0% tolerance and stable cathode current enable reliable trip-point setting without calibration across production lots. |
| Automotive Electronics | Battery-Powered Equipment |
Use Scenario: Reference for fuel injector driver ICs and exhaust gas sensor signal conditioning in engine control units (ECUs). IC Role / Device Role / Timing Role: Stable voltage source for analog-to-digital conversion of O2 sensor outputs and PWM duty-cycle feedback loops. Use Value: Q-grade –40°C to +125°C qualification and low thermal drift ensure consistent A/D accuracy despite under-hood thermal cycling. | Use Scenario: Calibration reference in handheld multimeters and portable gas detectors powered by AA/AAA cells. IC Role / Device Role / Timing Role: Low-quiescent-current shunt reference establishing measurement baseline for analog front-end amplifiers and ADCs. Use Value: 45μA minimum operating current extends usable battery life beyond 5 years in always-on monitoring modes. |
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 2.5V reference; 2% initial tolerance; higher 2.5mA min cathode current; requires external resistors. | Used where programmable output or higher voltage (>2V) is required; unsuitable for ultra-low-power or fixed-1.225V designs. | Select TL431ACDBVR only when adjustable output or higher reference voltage is needed; not drop-in for LM4041DQDBZR. |
| MAX6008BAUT+T | Fixed 1.25V output; ±0.2% tolerance; 75ppm/°C tempco; 35μA min cathode current; SOT-23-3 package. | Higher accuracy and lower drift, but limited to –40°C to +85°C; not qualified for automotive under-hood use. | Choose MAX6008BAUT+T for industrial instrumentation needing tighter specs, but avoid where extended temperature is mandatory. |
Compared with TL431ACDBVR and MAX6008BAUT+T, the LM4041DQDBZR uniquely balances D-grade cost efficiency, Q-grade automotive temperature range, fixed 1.225V output, and micropower operation - making it optimal for battery-backed automotive and industrial sensing where pin count, power, and temperature resilience are jointly constrained.
Availability
LM4041DQDBZR is available at Aetrix Electronics and suitable for automotive electronics, precision data-acquisition systems, and battery-powered equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041DQDBZR 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, with deep expertise in precision analog design and automotive-grade qualification.
The LM4041 product line delivers micropower shunt voltage references optimized for cost-sensitive, space-constrained, and thermally demanding applications - especially where fixed-output stability, low noise, and extended temperature operation are critical.
FAQ
What is the output voltage and tolerance of the LM4041DQDBZR?
The LM4041DQDBZR provides a fixed 1.225V nominal output voltage with a maximum initial tolerance of ±1.0% at 25°C (D grade). This tolerance holds across its full operating temperature range of –40°C to +125°C, and the device maintains this specification without requiring external trimming or calibration. The LM4041DQDBZR achieves this via Zener-zap wafer-level trimming during manufacturing.
Does the LM4041DQDBZR require an output capacitor for stability?
No, the LM4041DQDBZR does not require an output capacitor for stability. It is explicitly designed to remain stable with all capacitive loads - including zero capacitance - due to its inherent low dynamic impedance and internal compensation. Adding an output capacitor is optional and may be used for additional noise filtering, but it is never necessary for loop stability in any application using the LM4041DQDBZR.
What is the minimum cathode current required for proper operation of the LM4041DQDBZR?
The LM4041DQDBZR requires a minimum cathode current of 45μA (typical) to maintain regulation, with a maximum rated cathode current of 12mA. This wide 45μA–12mA operating range enables flexible design of the series current-limiting resistor (RS) and supports both ultra-low-power battery applications and higher-current monitoring circuits. The LM4041DQDBZR guarantees regulation across this full range at all temperatures from –40°C to +125°C.
Is the LM4041DQDBZR suitable for automotive applications?
Yes, the LM4041DQDBZR is qualified for automotive applications. The "Q" suffix denotes extended-temperature operation from –40°C to +125°C, and the device is specified and tested across this full range. It meets automotive reliability requirements for under-hood and body-control module use, including robustness against thermal cycling and ESD (±2000V HBM). Its fixed 1.225V output and D-grade tolerance make it suitable for sensor biasing, power-rail monitoring, and ADC referencing in automotive ECUs.
What package type and pin configuration does the LM4041DQDBZR use?
The LM4041DQDBZR uses the SOT-23-3 (DBZ) package: a 3-pin, gull-wing surface-mount outline measuring 2.92mm × 1.3mm. Pin 1 is Cathode (output/shunt node), Pin 2 is Anode (ground reference), and Pin 3 is NC (no connect), which must either float or be tied to Pin 2 per TI's EMI mitigation guidance. This pinout is standardized across all fixed-output LM4041 DBZ variants.
LM4041DQDBZR 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:
- ±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
LM4041DQDBZR FAQ
1.How can I place an order for LM4041DQDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DQDBZR 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 LM4041DQDBZR reliable?
The price and inventory of LM4041DQDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DQDBZR is usually 5 days.
3.What payment methods are accepted for LM4041DQDBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DQDBZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041DQDBZR?
LM4041DQDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DQDBZR 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 LM4041DQDBZR?
For technical support, including LM4041DQDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DQDBZR requirements.
6.How does Aetrix verify that LM4041DQDBZR is sourced from the original manufacturer or authorized distributors?
All LM4041DQDBZR 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 LM4041DQDBZR meets industry standards.
7.What is the process for return or replacement of LM4041DQDBZR?
All LM4041DQDBZR units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DQDBZR, 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 LM4041DQDBZR part is unused and in its original packaging.
Return procedure for LM4041DQDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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