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Diodes Incorporated LM4041DFTA
- Part No.:
- LM4041DFTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DFTA.pdf
- Description:
- IC VREF SHUNT 1% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:71,440
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Product details
Overview
LM4041DFTA from Diodes Incorporated is a precision 1.225 V shunt voltage reference in SOT23-3 package, rated at ±1% initial tolerance (25°C), 20 ppm/°C max temperature coefficient, and stable operation from 60 µA to 12 mA. It delivers low 20 µVRMS noise (10 Hz–10 kHz) and supports battery-powered instrumentation requiring micro-power accuracy.
For engineers reviewing the LM4041DFTA datasheet, LM4041DFTA pinout, LM4041DFTA application, or LM4041DFTA equivalent, key selection criteria include reverse breakdown voltage tolerance, capacitive-load stability, minimum operating current, thermal drift over –40°C to +125°C, and SOT23-3 layout constraints for pin 1–2 connection.
Technical Context
The LM4041DFTA implements a bandgap-based shunt reference architecture with internal curvature compensation, enabling stable 1.225 V output across 60 µA–12 mA cathode current and –40°C to +125°C ambient. Its dynamic impedance remains ≤2.0 Ω at 1 mA (120 Hz), and it tolerates unlimited capacitive loading without oscillation.
Unlike series references, this device requires only an external series resistor to regulate voltage; output is set by cathode-to-anode voltage drop, not supply rail. Pin 1 (anode) and pin 2 (cathode) are internally shorted in the SOT23-3 variant, mandating floating or tied configuration per layout guidelines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; sets precise bias point for ADCs, DACs, and comparators |
| Initial Tolerance | ±1% at 25°C; defines worst-case DC error before calibration |
| Temp Coefficient | ≤100 ppm/°C (max); limits drift-induced error in wide-temperature industrial use |
| Operating Current | 60 µA to 12 mA; enables ultra-low-power sensor nodes and high-current precision supplies |
| Noise (10 Hz–10 kHz) | 20 µVRMS; preserves signal integrity in high-resolution data acquisition |
| Long-Term Stability | 120 ppm (1000 hrs); ensures reference accuracy retention in sealed systems |
| Dynamic Impedance | ≤2.0 Ω at 1 mA; maintains regulation under fast load transients |
Pinout & Package
LM4041DFTA uses the SOT23-3 surface-mount package (3.0 mm × 1.4 mm × 1.1 mm). The die attach connects pin 1 (anode) and pin 2 (cathode) internally; pin 1 must be left floating or connected to pin 2 during PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Internally bonded to pin 2; must float or tie to pin 2 - no independent routing |
| Pin 2 | Cathode | Main output node; voltage referenced to anode; carries full cathode current |
| Pin 3 | NC / Not Connected | No internal connection; electrically isolated; may be used as thermal pad or left unconnected |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with any capacitive load - eliminates BOM cost and board space for stabilization caps |
| Micro-power operation | 60 µA minimum cathode current enables multi-year battery life in portable sensors |
| AEC-Q100 Grade 1 qualified | Rated for automotive ambient range (–40°C to +125°C) with validated reliability |
| Low noise performance | 20 µVRMS (10 Hz–10 kHz) avoids SNR degradation in 16-bit+ data converters |
| Wide current range | Regulates accurately from 60 µA to 12 mA - supports both ultra-low-power and high-precision supply rails |
Applications
| Battery-Powered Instrumentation | Precision Data Acquisition Systems |
|---|---|
|
Use Scenario: Handheld multimeter with 24-hour battery life and 0.1% measurement accuracy. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225 V for 24-bit sigma-delta ADC bias and gain calibration. Use Value: ±1% initial tolerance and 100 ppm/°C TC ensure <0.2% total error across operating temperature without trimming. |
Use Scenario: Industrial sensor node measuring strain, pressure, and temperature with remote wireless telemetry. IC Role / Device Role / Timing Role: Primary voltage reference for ratiometric bridge excitation and analog front-end gain setting. Use Value: 60 µA min current enables sleep-mode power budgeting; 20 µVRMS noise prevents LSB errors in 18-bit conversions. |
| Notebook System Power Monitoring | Automotive Cabin Control Module |
|
Use Scenario: Real-time battery voltage and system rail monitoring in ultrabook platform firmware. IC Role / Device Role / Timing Role: Reference for dedicated fuel-gauge ADC and VRM feedback comparator. Use Value: SOT23-3 footprint saves space on dense motherboard; AEC-Q100 qualification allows reuse in automotive-grade designs. |
Use Scenario: HVAC control unit with temperature-compensated sensor inputs and CAN bus communication. IC Role / Device Role / Timing Role: Stable reference for thermistor interface and microcontroller ADC channel calibration. Use Value: –40°C to +125°C operation and 120 ppm long-term stability ensure consistent readings over 10-year vehicle lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBVR | Adjustable 1.24–18 V output; 0.5% initial tolerance; higher 80 µA min current | Requires two external resistors; less suitable for fixed 1.225 V use cases | Select when adjustable output or tighter initial tolerance is needed, accepting larger solution size |
| MAX6008AEUR+T | Fixed 1.25 V output; ±0.2% tolerance; 75 ppm/°C TC; SC70-3 package | Higher accuracy but narrower current range (100 µA–10 mA); no AEC-Q100 rating | Prefer for lab-grade instrumentation where TC and tolerance outweigh automotive compliance needs |
Compared with TLVH431ACDBVR and MAX6008AEUR+T, LM4041DFTA offers the only combination of AEC-Q100 Grade 1 qualification, SOT23-3 footprint, ±1% tolerance at 1.225 V, and guaranteed 60 µA start-up - making it optimal for space-constrained automotive and portable industrial systems.
Availability
LM4041DFTA is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision data acquisition systems, and automotive cabin control modules requiring stable component supply with long lifecycle visibility.
Supply support for LM4041DFTA 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 manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The LM4041 product line delivers precision shunt references optimized for micro-power, wide-temperature, and high-stability applications in portable, industrial, and automotive electronics.
FAQ
What is the correct PCB layout for LM4041DFTA's pin 1 and pin 2?
Pin 1 (anode) and pin 2 (cathode) are internally shorted in the SOT23-3 package. Per Diodes' datasheet, pin 1 must either be left electrically floating or directly connected to pin 2 on the PCB. Routing pin 1 independently causes undefined behavior and violates the device's internal construction.
Can LM4041DFTA drive a 1 µF ceramic capacitor directly at its cathode?
Yes - the LM4041DFTA is explicitly designed for unconditional stability with any capacitive load, including 1 µF ceramics. Unlike many shunt references, it does not require series resistance or damping networks, simplifying layout and improving transient response in power-supply monitor circuits.
How does LM4041DFTA's 60 µA minimum operating current compare to alternatives like TL431?
LM4041DFTA's 60 µA minimum cathode current is 10× lower than the TL431's typical 1 mA requirement. This enables direct use in nanoampere-sleep microcontrollers and energy-harvesting systems where quiescent current dominates total power budget.
Is LM4041DFTA suitable for use in AEC-Q100-compliant automotive modules?
Yes - LM4041DFTA is AEC-Q100 Grade 1 qualified (–40°C to +125°C), with full reliability test reports available from Diodes Incorporated. It is approved for use in non-safety-critical automotive subsystems including body control, climate control, and infotainment power management.
LM4041DFTA 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:
- 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:
- 73 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041DFTA FAQ
1.How can I place an order for LM4041DFTA through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DFTA 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 LM4041DFTA reliable?
The price and inventory of LM4041DFTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DFTA is usually 5 days.
3.What payment methods are accepted for LM4041DFTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DFTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041DFTA?
LM4041DFTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DFTA 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 LM4041DFTA?
For technical support, including LM4041DFTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DFTA requirements.
6.How does Aetrix verify that LM4041DFTA is sourced from the original manufacturer or authorized distributors?
All LM4041DFTA 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 LM4041DFTA meets industry standards.
7.What is the process for return or replacement of LM4041DFTA?
All LM4041DFTA units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DFTA, 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 LM4041DFTA part is unused and in its original packaging.
Return procedure for LM4041DFTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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