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Diodes Incorporated LM4041CFTA
- Part No.:
- LM4041CFTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CFTA.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,447
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Product details
Overview
LM4041CFTA from Diodes Incorporated is a precision 1.225 V shunt voltage reference in SOT23-3 package, rated ±0.5% at 25°C, with 20 ppm/°C max temperature coefficient, 60 µA–12 mA operating current range, and 20 µVRMS noise (10 Hz–10 kHz). It serves as a stable reference in low-power analog signal chains for battery-powered instrumentation and portable power supplies.
For engineers reviewing the LM4041CFTA datasheet, LM4041CFTA pinout, LM4041CFTA application, or LM4041CFTA equivalent, key selection criteria include initial tolerance, thermal stability over –40°C to +125°C, capacitive-load immunity, dynamic impedance below 2 Ω at 1 mA, and AEC-Q100 Grade 1 qualification for automotive-grade reliability.
Technical Context
The LM4041CFTA implements a bandgap-based shunt topology with internal curvature compensation, enabling stable 1.225 V output across 60 µA–12 mA cathode current. Its design eliminates need for external output capacitance while maintaining <2 Ω dynamic impedance at 1 mA and <100 ppm/°C tempco over full industrial temperature range.
It operates as a two-terminal device where anode and cathode define current path, and its reference node is internally tied to cathode. Pin 1 (anode) must be left floating or shorted to pin 2 (cathode) in SOT23 due to die attachment configuration-this defines its fixed-output implementation distinct from adjustable variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; enables precise biasing of ADCs, DACs, and comparators without trimming |
| Initial Tolerance | ±0.5% at 25°C; reduces calibration overhead in production test for portable medical sensors |
| Tempco | ±20 ppm/°C typical (–40°C to +125°C); ensures ≤1.8 mV drift over full range for 12-bit accuracy |
| Operating Current | 60 µA to 12 mA; supports ultra-low-power sleep modes and high-current transient regulation |
| Noise (10 Hz–10 kHz) | 20 µVRMS; avoids added quantization error in 16-bit SAR ADC reference paths |
| Dynamic Impedance | 0.5 Ω at 1 mA; maintains regulation stability under fast load transients in data acquisition front-ends |
| Long-Term Stability | 120 ppm over 1000 hours; ensures reference integrity in unattended remote monitoring systems |
Pinout & Package
LM4041CFTA uses the SOT23-3 package (JEDEC TO-236AB), with die attached to pin 1, creating inherent electrical connection between pins 1 and 2. Pin 1 must be left floating or shorted to pin 2 per layout guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Anode terminal | Internally bonded to die substrate; must float or connect to pin 2 to avoid unintended conduction path |
| Pin 2 (Cathode) | Cathode terminal / Reference output | Primary current sink node; voltage referenced to this point; connects to load and series resistor |
| Pin 3 (NC) | No-connect | Not internally bonded; electrically isolated; no routing or grounding required |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with 0–1 µF capacitive loads due to internal phase compensation |
| Micro-power operation | 60 µA minimum cathode current enables use in coin-cell-powered IoT endpoints |
| AEC-Q100 Grade 1 qualified | Rated for –40°C to +125°C ambient; validated for automotive body electronics and ADAS sensor modules |
| Low noise performance | 20 µVRMS broadband noise preserves SNR in precision analog front-ends |
| High current tolerance | Withstands 12 mA cathode current without degradation-supports multi-channel reference distribution |
Applications
| Battery-Powered Medical Sensors | Portable Data Acquisition Systems |
|---|---|
Use Scenario: Continuous glucose monitor using 16-bit sigma-delta ADC with coin-cell supply. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225 V reference for ADC VREF input. Use Value: ±0.5% initial tolerance and 20 ppm/°C tempco ensure <0.01% full-scale error across body temperature range. |
Use Scenario: Handheld multimeter with auto-ranging analog front-end and Li-ion battery. IC Role / Device Role / Timing Role: Precision voltage reference for dual-slope integrator and comparator thresholds. Use Value: 20 µVRMS noise prevents digitization dither; 60 µA min current extends battery life beyond 100 hours. |
| Automotive Cabin Temperature Sensors | Notebook System Power Management |
Use Scenario: NTC-based cabin temperature sensing module in HVAC control unit. IC Role / Device Role / Timing Role: Stable reference for ratiometric measurement of thermistor voltage divider. Use Value: AEC-Q100 Grade 1 rating and –40°C to +125°C operation guarantee reliability across vehicle lifecycle. |
Use Scenario: Voltage margining circuit for CPU core VRM feedback loop in ultrabook platform. IC Role / Device Role / Timing Role: Adjustable reference source (via external resistors) for fine-tuning VDD voltage setpoint. Use Value: Configurable output (1.24–10 V) enables dynamic voltage scaling without changing BOM. |
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% tolerance; higher 80 ppm/°C tempco | Requires two external resistors; less suitable for fixed 1.225 V use cases | Select when programmable reference voltage or higher output voltage range is needed |
| MAX6008AEUR+T | Fixed 1.25 V output; ±0.2% tolerance; 15 ppm/°C tempco; SC70-3 package | Lower noise (12 µVRMS) but limited 100 µA–5 mA current range | Select when tighter initial tolerance and lower noise outweigh wider current range requirement |
Compared with TLVH431ACDBVR and MAX6008AEUR+T, LM4041CFTA offers optimal balance of ultra-low minimum current (60 µA), robust capacitive-load stability, and AEC-Q100 qualification-making it preferred for space-constrained, automotive-qualified, and battery-critical designs requiring fixed 1.225 V.
Availability
LM4041CFTA is available at Aetrix Electronics and suitable for battery-powered medical sensors, portable data acquisition systems, and automotive cabin temperature sensors requiring stable component supply with guaranteed long-term availability.
Supply support for LM4041CFTA 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 series belongs to Diodes' precision voltage reference product line, engineered specifically for micro-power, high-stability applications in portable, automotive, and industrial systems where space, power, and thermal performance are critical.
FAQ
What is the correct pin configuration for LM4041CFTA in SOT23-3?
Pin 1 is anode and internally bonded to the die substrate; it must be left floating or shorted to pin 2 (cathode) to prevent unintended current paths. Pin 2 is the cathode/reference output node, and pin 3 is no-connect. This configuration is mandatory per Diodes' layout guidelines and differs from standard three-terminal shunt references.
Can LM4041CFTA replace LM4041DFTA in a design?
Yes, LM4041CFTA can directly replace LM4041DFTA in most applications, as both share identical SOT23-3 packaging, pinout, and operating current range. The primary difference is initial tolerance: ±0.5% for C-grade versus ±1% for D-grade. No layout or schematic changes are required, but system-level accuracy validation may be needed if the design margin relies on tighter tolerance.
Does LM4041CFTA require an external capacitor for stability?
No, LM4041CFTA does not require an external output capacitor. Its internal compensation ensures stability with capacitive loads ranging from 0 to at least 1 µF, as verified in typical characteristics graphs. Adding capacitance may reduce high-frequency noise but is not necessary for basic regulation stability.
Is LM4041CFTA qualified for automotive use?
LM4041CFTA is commercial-grade (not automotive-qualified), but Diodes offers the pin-compatible LM4041CQFTA variant, which carries AEC-Q100 Grade 1 qualification (-40°C to +125°C) and is manufactured under automotive-specific process controls. For automotive applications, LM4041CQFTA-not LM4041CFTA-is the approved part.
LM4041CFTA 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:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 68 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041CFTA FAQ
1.How can I place an order for LM4041CFTA through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CFTA 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 LM4041CFTA reliable?
The price and inventory of LM4041CFTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CFTA is usually 5 days.
3.What payment methods are accepted for LM4041CFTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CFTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CFTA?
LM4041CFTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CFTA 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 LM4041CFTA?
For technical support, including LM4041CFTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CFTA requirements.
6.How does Aetrix verify that LM4041CFTA is sourced from the original manufacturer or authorized distributors?
All LM4041CFTA 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 LM4041CFTA meets industry standards.
7.What is the process for return or replacement of LM4041CFTA?
All LM4041CFTA units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CFTA, 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 LM4041CFTA part is unused and in its original packaging.
Return procedure for LM4041CFTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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