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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Reference

Texas Instruments LM4041D12QDBZT

Name: LM4041D12QDBZT
Brand: Texas Instruments
SKU: LM4041D12QDBZT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM4041D12QDBZT

Manufacturer:: Texas Instruments

Category:: Voltage Reference

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: LM4041D12QDBZT.pdf

Description:: IC VREF SHUNT 1% SOT23-3

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Product details

Overview

LM4041D12QDBZT 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 across –40°C to +125°C. It delivers stable regulation with cathode current as low as 45 μA (typical) and supports data-acquisition systems requiring high-accuracy analog front-ends.

For engineers reviewing the LM4041D12QDBZT datasheet, LM4041D12QDBZT pinout, LM4041D12QDBZT application, or LM4041D12QDBZT equivalent, key selection criteria include extended-temperature performance, low-noise (20 μV_RMS) operation, wide cathode current range (45 μA–12 mA), and SOT-23-3 package compatibility with space-constrained industrial and automotive designs.

Technical Context

The LM4041D12QDBZT 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 ≤2 Ω (at I_Z = 1 mA, 120 Hz), enabling stable regulation under varying load conditions without external capacitance.

Designed for extended-temperature operation (–40°C to +125°C), it maintains long-term stability of 120 ppm over 1000 hours and exhibits low sensitivity to cathode current variation (ΔV_Z/ΔI_Z ≤ 10 mV across 1–12 mA), making it suitable for battery-powered and thermally demanding applications.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.225 V nominal; enables direct replacement of legacy 1.2 V references in precision ADC/DAC biasing.
Initial Tolerance	±1.0% max at 25°C (D grade); defines worst-case DC error budget before temperature drift or aging effects.
Temp Coefficient	150 ppm/°C max over –40°C to +125°C; limits output drift to ±18.3 mV across full operating range.
Cathode Current Range	45 μA (min) to 12 mA (max); supports ultra-low-power sensor nodes and higher-current monitoring circuits.
Output Noise	20 μV_RMS (10 Hz–10 kHz); preserves signal integrity in high-resolution data acquisition front-ends.
Dynamic Impedance	≤2 Ω at 1 mA, 120 Hz; ensures minimal output voltage shift under transient load changes.
Long-Term Stability	120 ppm over 1000 h; guarantees predictable calibration drift in metering and test equipment.

Pinout & Package

LM4041D12QDBZT uses the 3-pin SOT-23 (DBZ) package with exposed pad not connected internally. Pin 1 is Cathode (output/shunt node), Pin 2 is Anode (ground reference), and Pin 3 is NC (no connect, must float or tie to Anode per TI EMI guidance).

Pin/Terminal	Circuit Role	Design Meaning
1 - Cathode	Shunt current sink and regulated output node	Connects to external series resistor and load; carries total current (I_Z + I_L) and sets output voltage via shunt action.
2 - Anode	Reference ground terminal	Must be connected to system ground; serves as return path for cathode current and defines output voltage relative to ground.
3 - NC	No-connect terminal	Not internally bonded; must remain floating or tied to Anode to suppress EMI coupling in noisy environments.

Key Features

Feature	Design Value
Zero-output-capacitor stability	Operates stably with any capacitive load; eliminates BOM cost and layout area for output bypass caps.
Extended temperature range	Rated for –40°C to +125°C ambient; qualified for under-hood automotive and industrial control applications.
Low micropower operation	Minimum cathode current of 45 μA (typical); extends battery life in portable instrumentation and remote sensors.
High ESD robustness	±2000 V HBM rating; withstands handling and board-level assembly without special precautions.
Trimmed Zener core	Fuse and Zener-zap trimming at wafer level; achieves tight initial tolerance without laser adjustment.

Applications

Data-Acquisition Systems	Power-Supply Monitors
Use Scenario: High-resolution 16-bit+ SAR or delta-sigma ADC reference in portable multimeters and environmental sensors. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225 V reference for ADC internal conversion and external signal conditioning. Use Value: 20 μV_RMS noise and 150 ppm/°C drift ensure <0.01% measurement error across temperature, meeting Class 0.1 metering requirements.	Use Scenario: Overvoltage/undervoltage detection in 12 V automotive power rails and industrial SMPS feedback loops. IC Role / Device Role / Timing Role: Precision shunt element in comparator-based monitor circuits, setting trip thresholds with known accuracy. Use Value: ±1.0% tolerance and –40°C to +125°C operation enable reliable fault detection across vehicle lifetime without recalibration.
Process Control Transmitters	Battery-Powered Equipment
Use Scenario: 4–20 mA loop-powered field transmitters measuring pressure, flow, or temperature in chemical plants. IC Role / Device Role / Timing Role: Reference source for DAC output scaling and sensor excitation, sharing single 3.3 V supply with microcontroller and analog front-end. Use Value: 45 μA minimum cathode current allows operation down to 2.7 V supply while maintaining 1.225 V reference accuracy for 12-bit loop resolution.	Use Scenario: Low-power gas detectors and handheld medical devices powered by coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Voltage reference for battery voltage monitoring, sensor biasing, and low-dropout regulator feedback. Use Value: Micropower consumption (45 μA typ.) extends operational life beyond 5 years on CR2032, while 120 ppm long-term stability avoids field recalibration.

Data-Acquisition Systems

Power-Supply Monitors

Use Scenario: High-resolution 16-bit+ SAR or delta-sigma ADC reference in portable multimeters and environmental sensors.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225 V reference for ADC internal conversion and external signal conditioning.

Use Value: 20 μV_RMS noise and 150 ppm/°C drift ensure <0.01% measurement error across temperature, meeting Class 0.1 metering requirements.

Use Scenario: Overvoltage/undervoltage detection in 12 V automotive power rails and industrial SMPS feedback loops.

IC Role / Device Role / Timing Role: Precision shunt element in comparator-based monitor circuits, setting trip thresholds with known accuracy.

Use Value: ±1.0% tolerance and –40°C to +125°C operation enable reliable fault detection across vehicle lifetime without recalibration.

Process Control Transmitters

Battery-Powered Equipment

Use Scenario: 4–20 mA loop-powered field transmitters measuring pressure, flow, or temperature in chemical plants.

IC Role / Device Role / Timing Role: Reference source for DAC output scaling and sensor excitation, sharing single 3.3 V supply with microcontroller and analog front-end.

Use Value: 45 μA minimum cathode current allows operation down to 2.7 V supply while maintaining 1.225 V reference accuracy for 12-bit loop resolution.

Use Scenario: Low-power gas detectors and handheld medical devices powered by coin-cell or Li-ion batteries.

IC Role / Device Role / Timing Role: Voltage reference for battery voltage monitoring, sensor biasing, and low-dropout regulator feedback.

Use Value: Micropower consumption (45 μA typ.) extends operational life beyond 5 years on CR2032, while 120 ppm long-term stability avoids field recalibration.

Equivalent & Alternatives

The following parts are listed as comparable options for similar shunt voltage reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL431CDBZR	Adjustable 2.5 V reference; 2% initial tolerance; 50 μA min cathode current; requires external resistors for 1.225 V setup.	Higher minimum current and less precise output require redesign of bias network and may increase power draw.	Select when existing TL431 footprint is preferred and ±2% tolerance is acceptable for cost-sensitive industrial controls.
MAX6008AEUR+T	Fixed 1.25 V output; ±0.2% tolerance; 100 ppm/°C tempco; operates up to +85°C only.	Lacks extended-temperature qualification; unsuitable for automotive under-hood or high-ambient industrial use.	Choose for commercial-grade portable instruments where tighter initial tolerance justifies reduced thermal range.

Compared with TL431CDBZR and MAX6008AEUR+T, LM4041D12QDBZT uniquely combines D-grade tolerance (±1.0%), extended-temperature operation (–40°C to +125°C), and micropower capability (45 μA) in a fixed 1.225 V SOT-23 package-enabling drop-in upgrades in automotive and industrial shunt reference designs without layout or bill-of-material changes.

Availability

LM4041D12QDBZT is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and battery-powered equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LM4041D12QDBZT 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 extended-temperature operation in space-constrained applications such as portable instrumentation and automotive subsystems.

FAQ

What is the maximum operating temperature for LM4041D12QDBZT?

The LM4041D12QDBZT is characterized for operation from –40°C to +125°C ambient temperature. This extended temperature range qualifies it for under-hood automotive applications and high-ambient industrial control systems where standard industrial-grade references (–40°C to +85°C) would fail.

Does LM4041D12QDBZT require an output capacitor for stability?

No, LM4041D12QDBZT does not require an output capacitor for stability. It is designed to remain stable with all capacitive loads, including zero capacitance. Adding a capacitor is optional and used only for additional noise filtering-not for loop compensation.

What is the minimum cathode current needed for LM4041D12QDBZT to regulate properly?

The LM4041D12QDBZT requires a minimum cathode current of 45 μA (typical) and 80 μA (max over temperature) to maintain regulation within specification. Below this threshold, output voltage deviates from 1.225 V and temperature coefficient degrades.

How does the 150 ppm/°C temperature coefficient affect LM4041D12QDBZT output voltage over its full range?

With a maximum 150 ppm/°C temperature coefficient, LM4041D12QDBZT's output voltage can drift up to ±18.3 mV across its –40°C to +125°C range (165°C span × 150 ppm/°C × 1.225 V). This drift is fully specified and included in total error budgets for precision applications.

Can LM4041D12QDBZT be used in place of LM4041D12IDBZT?

Yes, LM4041D12QDBZT can replace LM4041D12IDBZT in designs requiring extended temperature operation. Both share identical electrical specs and SOT-23-3 (DBZ) packaging, but LM4041D12QDBZT is rated for –40°C to +125°C versus –40°C to +85°C for the 'I' version-making it suitable for harsher thermal environments.

LM4041D12QDBZT 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:: Obsolete

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

LM4041D12QDBZT FAQ

1.How can I place an order for LM4041D12QDBZT through Aetrix?

Please submit a Request for Quotation (RFQ) for LM4041D12QDBZT 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 LM4041D12QDBZT reliable?

The price and inventory of LM4041D12QDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041D12QDBZT is usually 5 days.

3.What payment methods are accepted for LM4041D12QDBZT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041D12QDBZT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM4041D12QDBZT?

LM4041D12QDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM4041D12QDBZT 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 LM4041D12QDBZT?

For technical support, including LM4041D12QDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041D12QDBZT requirements.

6.How does Aetrix verify that LM4041D12QDBZT is sourced from the original manufacturer or authorized distributors?

All LM4041D12QDBZT 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 LM4041D12QDBZT meets industry standards.

7.What is the process for return or replacement of LM4041D12QDBZT?

All LM4041D12QDBZT units undergo pre-shipment inspection (PSI). If there is an issue with LM4041D12QDBZT, 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 LM4041D12QDBZT part is unused and in its original packaging.

Return procedure for LM4041D12QDBZT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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