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Diodes Incorporated LM4041DQFTA
- Part No.:
- LM4041DQFTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041DQFTA.pdf
- Description:
- IC VREF SHUNT 1.225V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,909
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Product details
Overview
LM4041DQFTA from Diodes Incorporated is an AEC-Q100 Grade 1 qualified precision shunt voltage reference delivering a fixed 1.225 V output with ±1% initial tolerance at 25°C, 20 ppm/°C max temperature coefficient over –40°C to +125°C, 60 µA to 12 mA operating current range, and 20 µVRMS noise (10 Hz–10 kHz). It is used in automotive power management circuits requiring stable, low-power reference voltage under varying load and temperature conditions.
For engineers reviewing the LM4041DQFTA datasheet, LM4041DQFTA pinout, LM4041DQFTA application, or LM4041DQFTA equivalent, key selection criteria include its automotive-grade qualification, SOT23-3 package compatibility, shunt topology for flexible biasing, low dynamic impedance (≤2.0 Ω), and tolerance stability across extended temperature and current ranges.
Technical Context
The LM4041DQFTA implements a bandgap-based shunt reference architecture with internal curvature compensation, enabling stable 1.225 V regulation without external capacitors. Its design supports operation from 60 µA minimum cathode current up to 12 mA while maintaining <100 ppm/°C max TC and <2.5 mV total voltage drift over –40°C to +125°C.
It features high capacitive-load tolerance due to inherent stability optimization, eliminating need for output capacitance even with >1 µF loads. The device's low 60 nA typical reference input current and 0.7–10 mV current-induced voltage shift (ΔVR/ΔIR) enable high-accuracy feedback in low-quiescent-current systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; enables precise ADC/DAC biasing and regulator feedback in 1.2–1.3 V rail systems. |
| Initial Tolerance | ±1% at 25°C (D grade); defines maximum absolute error before calibration in production test. |
| Temp Coefficient | ±20 ppm/°C typical, ≤100 ppm/°C max (–40°C to +125°C); ensures ≤12.4 mV total drift over full automotive range. |
| Operating Current | 60 µA to 12 mA; supports ultra-low-power sensor nodes and high-current analog front-ends without re-biasing. |
| Noise (10 Hz–10 kHz) | 20 µVRMS; minimizes quantization error in 16-bit+ data acquisition systems. |
| Dynamic Impedance | 0.5–2.0 Ω (at 1 mA, 120 Hz); maintains regulation accuracy despite fast load transients. |
| Long-Term Stability | 120 ppm (1000 hrs); guarantees minimal drift in safety-critical automotive modules over service life. |
Pinout & Package
LM4041DQFTA uses the SOT23-3 surface-mount package (JEDEC TO-236AB), with die attached to pin 1 (anode), creating an internal short between pins 1 and 2. Pin 1 must be left floating or connected externally to pin 2 per layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Anode terminal / die attachment point | Internally bonded to pin 2; must float or tie to pin 2 to avoid unintended shorts in PCB routing. |
| Pin 2 (Cathode) | Cathode terminal / reference output | Provides regulated 1.225 V reference voltage; connects to feedback node of LDOs or ADC references. |
| Pin 3 (NC) | No-connect terminal | Not internally connected; must remain unconnected on PCB to prevent parasitic coupling or ESD path disruption. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with 0–1 µF capacitive loads eliminates BOM cost and board space for decoupling caps. |
| AEC-Q100 Grade 1 qualified | Validated for automotive ambient temperatures (–40°C to +125°C) and lifetime reliability per ISO/TS 16949. |
| Low 20 µVRMS noise | Enables <1 LSB error in 16-bit SAR ADCs without additional filtering or post-regulation stages. |
| 60 µA minimum operating current | Supports battery-powered telematics modules drawing <100 µA sleep current while retaining reference accuracy. |
| 100 ppm/°C max tempco | Meets ASIL-B functional safety requirements for voltage monitoring in EPS and ADAS power domains. |
Applications
| Automotive Body Control Module (BCM) | Engine Control Unit (ECU) Sensor Biasing |
|---|---|
Use Scenario: Provides stable reference for analog sensor signal conditioning in door module microcontrollers. IC Role / Device Role / Timing Role: Shunt voltage reference supplying 1.225 V to op-amp gain stages and ADC inputs. Use Value: Maintains ±1% reference accuracy across –40°C to +125°C ambient, ensuring consistent airbag deployment thresholds and window position sensing. |
Use Scenario: Supplies precision bias to oxygen and knock sensors in gasoline direct injection engines. IC Role / Device Role / Timing Role: Fixed-voltage shunt reference in sensor front-end circuitry, replacing higher-power series references. Use Value: Enables <0.5% measurement repeatability over 10-year vehicle lifetime with only 120 ppm long-term drift. |
| ADAS Camera Power Management | Telematics Control Unit (TCU) Voltage Monitoring |
Use Scenario: References voltage supervisor ICs and image sensor ADCs in 77 GHz radar camera modules. IC Role / Device Role / Timing Role: Low-noise (20 µVRMS) reference source for high-resolution image capture chains. Use Value: Reduces thermal noise contribution to <0.05% of full-scale, preserving SNR in low-light imaging modes. |
Use Scenario: Monitors backup battery and main supply rails in LTE-connected fleet management units. IC Role / Device Role / Timing Role: Precision shunt element in resistor-divider networks feeding microcontroller ADC channels. Use Value: Delivers ±1.2 mV absolute accuracy at 12 V system level, enabling reliable low-battery warning at 11.8 V threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431AIDBZR | Adjustable (1.24–18 V), 0.5% initial tolerance, higher 80 µA min current, no AEC-Q100 qualification. | Requires external resistors for 1.225 V setting; unsuitable for automotive production without requalification. | Select when adjustable output and lower cost outweigh automotive qualification needs. |
| MAX6008AEUR+T | Fixed 1.25 V, ±0.2% tolerance, 30 ppm/°C TC, SC70-3 package, not AEC-Q100 qualified. | Higher accuracy but lacks automotive temperature range support and fails AEC-Q100 Grade 1 compliance. | Prefer for industrial portable instruments where tighter tolerance justifies non-automotive status. |
Compared with TLVH431AIDBZR and MAX6008AEUR+T, LM4041DQFTA uniquely combines AEC-Q100 Grade 1 qualification, SOT23-3 automotive footprint, fixed 1.225 V output, and guaranteed ±1% tolerance across –40°C to +125°C - making it the only drop-in solution for production automotive voltage reference designs requiring zero redesign effort.
Availability
LM4041DQFTA is available at Aetrix Electronics and suitable for automotive body control modules, engine control units, ADAS camera subsystems, and telematics control units requiring stable component supply with full AEC-Q100 traceability and lifecycle continuity.
Supply support for LM4041DQFTA 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, specializing in high-reliability components for automotive, industrial, and computing markets with ISO/TS 16949-certified operations.
The LM4041 product line delivers precision shunt references optimized for space-constrained, low-power automotive systems-designed specifically to replace legacy bandgap references in BCM, ECU, and ADAS power domains while meeting AEC-Q100 Grade 1 requirements.
FAQ
Can LM4041DQFTA be used in place of LM4041CQFTA?
Yes, LM4041DQFTA is pin-compatible with LM4041CQFTA but has ±1% initial tolerance versus ±0.5%. It shares identical SOT23-3 packaging, AEC-Q100 Grade 1 qualification, 1.225 V nominal output, and –40°C to +125°C operating range. Use D-grade where 1% tolerance meets system accuracy requirements and cost reduction is prioritized.
What is the correct PCB layout for LM4041DQFTA's pin 1 and pin 2?
Per Diodes' datasheet, pin 1 (anode) is internally bonded to pin 2 (cathode) in the SOT23-3 package. Therefore, pin 1 must either be left electrically floating or connected directly to pin 2 on the PCB. Connecting pin 1 to ground or other nets will cause malfunction or damage due to internal shorting.
Does LM4041DQFTA require an external capacitor for stability?
No. LM4041DQFTA is designed for unconditional stability with capacitive loads up to 1 µF and does not require an external output capacitor. This is confirmed by its "No output capacitor required" feature and stable impedance vs. frequency curves in the datasheet across 0.1–100 kHz.
How does LM4041DQFTA's 60 µA minimum operating current impact battery-powered designs?
At 60 µA minimum cathode current, LM4041DQFTA enables continuous reference operation in ultra-low-power automotive modules such as tire pressure sensors or smart junction boxes, where system sleep currents are <100 µA. Its regulation remains valid down to this current, avoiding dropout or accuracy loss during deep-sleep states.
LM4041DQFTA 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041DQFTA FAQ
1.How can I place an order for LM4041DQFTA through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041DQFTA 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 LM4041DQFTA reliable?
The price and inventory of LM4041DQFTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041DQFTA is usually 5 days.
3.What payment methods are accepted for LM4041DQFTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041DQFTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041DQFTA?
LM4041DQFTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041DQFTA 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 LM4041DQFTA?
For technical support, including LM4041DQFTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041DQFTA requirements.
6.How does Aetrix verify that LM4041DQFTA is sourced from the original manufacturer or authorized distributors?
All LM4041DQFTA 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 LM4041DQFTA meets industry standards.
7.What is the process for return or replacement of LM4041DQFTA?
All LM4041DQFTA units undergo pre-shipment inspection (PSI). If there is an issue with LM4041DQFTA, 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 LM4041DQFTA part is unused and in its original packaging.
Return procedure for LM4041DQFTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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