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

Diodes Incorporated LM4041DADJQFTA

Name: LM4041DADJQFTA
Brand: Diodes Incorporated
SKU: LM4041DADJQFTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM4041DADJQFTA

Manufacturer:: Diodes Incorporated

Category:: Voltage Reference

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

Datasheet:: LM4041DADJQFTA.pdf

Description:: IC VREF SHUNT ADJ 1% SOT23

Quantity:: RFQ Add To RFQ list

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Inventory:3,436

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Product details

Overview

LM4041DADJQFTA from Diodes Incorporated is an automotive-grade adjustable shunt voltage reference delivering 1.24V to 10V output with ±1% initial tolerance at +25°C, 20ppm/°C max temperature coefficient, and stable operation from 60µA to 12mA supply current in SOT23 package. It serves as a precision voltage setting element in feedback loops of isolated DC-DC converters and battery monitoring circuits.

For engineers reviewing the LM4041DADJQFTA datasheet, LM4041DADJQFTA pinout, LM4041DADJQFTA application, or LM4041DADJQFTA equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, no-output-capacitor stability, low 20µV_RMS noise (10Hz–10kHz), and cathode-voltage-dependent reference drift of –4.0mV/V over –40°C to +125°C.

Technical Context

The LM4041DADJQFTA operates as a 3-terminal shunt reference: anode, cathode, and adjust (REF) pins enable external resistor-divider programming of output voltage between 1.24V and 10V using V_OUT = V_REF × (1 + R₂/R₁). Its bandgap core maintains regulation across 60µA–12mA cathode current.

It features inherent capacitive-load immunity, dynamic impedance as low as 0.5Ω at 1mA, and long-term stability of 120ppm over 1000 hours. The device is qualified to AEC-Q100 Grade 1 (–40°C to +125°C ambient), with absolute maximum cathode voltage of 15V and ESD ratings of 4kV HBM.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage Range	1.24V to 10V - programmable via external resistive divider; sets precise feedback threshold in isolated power supplies.
Initial Tolerance	±1% at +25°C - ensures accurate voltage setpoint without calibration in automotive sensor signal conditioning.
Temp Coefficient	20ppm/°C max (–40°C to +125°C) - enables stable reference performance across full automotive temperature range.
Operating Current	60µA to 12mA - supports ultra-low-power battery monitoring and high-current industrial power supervision.
Noise (10Hz–10kHz)	20µV_RMS - minimizes voltage error in precision ADC reference and analog front-end biasing.
Cathode Voltage Drift	–4.0mV/V max - quantifies reference shift per volt change in cathode potential, critical for high-side sensing designs.
Long-Term Stability	120ppm (1000 hrs) - guarantees minimal reference drift during vehicle lifetime deployment.

Pinout & Package

LM4041DADJQFTA is housed in a RoHS-compliant, halogen-free SOT23-3 package (JEDEC TO-236AB), with thermal resistance θ_JA = 380°C/W and 330mW max power dissipation at +25°C ambient.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1: ANODE	Reference ground node	Connected to system ground; internal bandgap circuit return path; must be at lowest potential in shunt configuration.
Pin 2: CATHODE	Output terminal	Delivers regulated voltage; sinks current from external supply through series resistor; voltage set by REF-to-CATHODE divider.
Pin 3: REF (ADJUST)	Feedback input	Connects to voltage divider midpoint; senses fraction of cathode voltage to regulate output; floating or tied to Pin 2 only in fixed-voltage variants.

Key Features

Feature	Design Value
No output capacitor required	Stable under all load capacitance conditions up to 1µF - eliminates BOM cost and layout area for decoupling in space-constrained modules.
Low dynamic impedance	0.5Ω at 1mA - reduces output voltage perturbation during transient load steps in closed-loop power control.
AEC-Q100 Grade 1 qualification	Validated for –40°C to +125°C operation with PPAP support - meets OEM requirements for engine control, ADAS, and body electronics.
Ultra-low quiescent current	60µA minimum operating current - enables direct connection to Li-ion battery cells for multi-year voltage monitoring without significant self-discharge.
Green packaging	Lead-free, halogen-free, antimony-free SOT23 - satisfies EU RoHS 2 and automotive ELV directive compliance without derating.

Applications

Automotive Battery Monitoring

Isolated DC-DC Feedback

Use Scenario: Real-time cell voltage measurement in 12V starter battery and 48V mild-hybrid systems.

IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5V or 5V reference for SAR ADC input scaling.

Use Value: ±1% tolerance and 20ppm/°C TC ensure <±5mV total error over –40°C to +125°C, meeting ISO 16750-4 cold-cranking voltage accuracy requirements.

Use Scenario: Secondary-side voltage sensing in flyback or forward converters with optocoupler feedback.

IC Role / Device Role / Timing Role: Programmable shunt reference setting precise output voltage via resistor divider on transformer secondary.

Use Value: 1.24V–10V adjustability allows single BOM to support multiple output rails (3.3V, 5V, 12V); no capacitor needed simplifies secondary-side layout.

Industrial Sensor Signal Conditioning

Portable Medical Device Power Supervision

Use Scenario: Excitation voltage reference for bridge-based pressure and temperature transducers in engine manifolds.

IC Role / Device Role / Timing Role: Precision voltage source for ratiometric excitation, referenced to same ground as ADC.

Use Value: 20µV_RMS noise prevents degradation of 16-bit sensor resolution; AEC-Q100 qualification permits use in under-hood environments.

Use Scenario: Low-power brown-out detection and battery gauge reference in handheld ultrasound and glucose meters.

IC Role / Device Role / Timing Role: Adjustable shunt reference generating 1.8V or 2.0V threshold for microcontroller reset logic.

Use Value: 60µA min operating current extends battery life beyond 5 years in standby; SOT23 footprint fits sub-10mm² PCB area budgets.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLVH431AQDBVRQ1	Higher 2% initial tolerance; 50ppm/°C max TC; requires ≥100µA cathode current	Less suitable for high-accuracy battery voltage monitoring below 100µA load	Select when cost sensitivity outweighs precision and ultra-low-current operation
MAX6008AEUR+T	Fixed 2.048V output only; 0.5% tolerance; 25ppm/°C TC; SOT23-3 pinout differs (REF not exposed)	Not usable for adjustable-voltage applications; incompatible pin mapping for REF feedback	Choose only for fixed 2.048V needs where higher initial accuracy justifies loss of adjustability

Compared with TLVH431AQDBVRQ1 and MAX6008AEUR+T, LM4041DADJQFTA uniquely combines ±1% tolerance, 20ppm/°C TC, 60µA minimum current, and true 3-pin adjustability in standard SOT23 - making it optimal for automotive power management requiring both precision and design flexibility.

Availability

LM4041DADJQFTA is available at Aetrix Electronics and suitable for automotive battery monitoring, isolated DC-DC feedback, and industrial sensor signal conditioning requiring stable component supply with AEC-Q100 compliance and PPAP documentation support.

Supply support for LM4041DADJQFTA 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

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions, with emphasis on automotive, industrial, and power management applications.

The LM4041Q product line delivers AEC-Q100-qualified precision references for safety-critical automotive subsystems, designed specifically to replace legacy references in engine control units, ADAS cameras, and body electronics where reliability and temperature stability are paramount.

FAQ

What is the maximum cathode voltage rating for LM4041DADJQFTA?

The absolute maximum cathode voltage is 15V, as specified in the Absolute Maximum Ratings table. Exceeding this value risks permanent damage. In normal operation, cathode voltage is set by the external resistor divider and must remain within 1.24V to 10V per the recommended output range; operation above 10V is not characterized and may degrade long-term stability.

Can LM4041DADJQFTA be used without an external capacitor?

Yes - the device is explicitly designed for unconditional stability with no output capacitor required, even with up to 1µF of capacitive load. This is confirmed in the datasheet's "No Output Capacitor Required" feature and validated in Typical Characteristics plots showing stable impedance vs. frequency with and without 1µF tantalum.

How does the REF pin function in the adjustable configuration?

The REF pin (Pin 3) is the feedback input that senses the voltage divider ratio between cathode and anode. Regulation occurs when the voltage at REF equals the internal 1.233V bandgap reference. Output voltage is calculated as V_OUT = 1.233V × (1 + R₂/R₁), where R₁ connects REF to ANODE and R₂ connects CATHODE to REF.

Is LM4041DADJQFTA compatible with standard SOT23 PCB footprints?

Yes - it uses the JEDEC-standard SOT23-3 (TO-236AB) package with documented dimensions: 2.90mm × 1.30mm × 1.03mm (L × W × H). Pad layout matches Diodes' official SOT23 outline (Package Code F), including 0.975mm pitch between Pins 1 and 2, and is fully compatible with IPC-7351B generic SOT23 land patterns.

LM4041DADJQFTA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

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):: 1.24V

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:: 73 µA

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

LM4041DADJQFTA FAQ

1.How can I place an order for LM4041DADJQFTA through Aetrix?

Please submit a Request for Quotation (RFQ) for LM4041DADJQFTA 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 LM4041DADJQFTA reliable?

The price and inventory of LM4041DADJQFTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DADJQFTA is usually 5 days.

3.What payment methods are accepted for LM4041DADJQFTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DADJQFTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM4041DADJQFTA?

LM4041DADJQFTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM4041DADJQFTA 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 LM4041DADJQFTA?

For technical support, including LM4041DADJQFTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DADJQFTA requirements.

6.How does Aetrix verify that LM4041DADJQFTA is sourced from the original manufacturer or authorized distributors?

All LM4041DADJQFTA 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 LM4041DADJQFTA meets industry standards.

7.What is the process for return or replacement of LM4041DADJQFTA?

All LM4041DADJQFTA units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DADJQFTA, 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 LM4041DADJQFTA part is unused and in its original packaging.

Return procedure for LM4041DADJQFTA:

1.Submit a request within 90 days.

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

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