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Analog Devices Inc./Maxim Integrated LM4040AIX3-4.1+T
- Part No.:
- LM4040AIX3-4.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4040AIX3-4.1+T.pdf
- Description:
- IC VREF SHUNT 0.1% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,465
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Product details
Overview
LM4040AIX3-4.1+T from Maxim Integrated is a precision 4.096V two-terminal shunt voltage reference in SC70-3 package, featuring 0.1% initial accuracy, ±100ppm/°C temperature coefficient, and guaranteed operation from –40°C to +85°C. It delivers stable reverse-breakdown voltage with 60μA to 15mA shunt current capability and low 64μVRMS wideband noise (10Hz–10kHz), ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4040AIX3-4.1+T datasheet, LM4040AIX3-4.1+T pinout, LM4040AIX3-4.1+T application, or LM4040AIX3-4.1+T equivalent, key selection criteria include its fixed 4.096V output, SC70-3 footprint compatibility, A-grade accuracy tolerance (±4.1mV at +25°C), no-output-capacitor stability, and automotive-grade thermal performance up to +85°C ambient.
Technical Context
The LM4040AIX3-4.1+T uses bandgap-based shunt regulation to maintain a precise 4.096V reverse breakdown voltage across its anode–cathode terminals. Its laser-trimmed internal resistor network ensures 0.1% initial accuracy, while the 100ppm/°C max temperature coefficient guarantees tight voltage stability over industrial temperature ranges.
It operates as a two-terminal device requiring only external series resistance for current biasing, supports capacitive loads without oscillation, and achieves low dynamic impedance (≤1.0Ω at 1mA) to minimize load-induced voltage variation. The N.C. pin (Pin 3) must remain unconnected or tied to cathode (Pin 2) per layout requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; ±4.1mV (±0.1%) tolerance at +25°C ensures LSB-level accuracy in 12-bit systems. |
| Initial Accuracy | 0.1% (Grade A); enables direct use in precision data converters without calibration. |
| Tempco | ±100ppm/°C max; limits drift to ±6.5mV over –40°C to +85°C, critical for battery-powered sensors. |
| Shunt Current Range | 60μA to 15mA; allows flexible biasing from ultra-low-power IoT nodes to higher-current analog front-ends. |
| Wideband Noise | 64μVRMS (10Hz–10kHz); minimizes quantization error in high-resolution ADC references. |
| Dynamic Impedance | ≤1.0Ω at 1mA; maintains <1mV output shift under 1mA load transients, improving regulation fidelity. |
| No External Capacitor | Stable with any capacitive load; eliminates BOM cost and PCB area for decoupling caps. |
Pinout & Package
LM4040AIX3-4.1+T is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23 equivalents. Pin 3 is No Connection (N.C.) and must be left floating or connected to Pin 2 (cathode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode | Positive terminal; connects to system ground or low-side reference node in shunt configuration. |
| 2 (–) | Cathode | Negative terminal; connects to regulated voltage rail via series resistor; defines output reference point. |
| 3 (N.C.) | No Connection | Must not be used for signal or power; tie to Pin 2 or leave unconnected to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 package | 1.8mm × 1.8mm footprint saves >50% board space vs. SOT23, enabling dense portable designs. |
| 0.1% initial accuracy | Eliminates need for post-assembly trimming in medical and test equipment reference circuits. |
| No output capacitor required | Reduces bill-of-materials count and simplifies layout-stable even with 10µF ceramic output capacitance. |
| 60μA minimum operating current | Enables micropower operation in always-on sensor nodes with sub-100µA quiescent budgets. |
| AEC-Q100 qualified variants available | Supports automotive applications when specified with /V suffix; LM4040AEX3-4.1+T covers –40°C to +125°C. |
Applications
| Portable Instrumentation | Industrial Data Acquisition |
|---|---|
Use Scenario: Handheld multimeters and portable oscilloscopes requiring stable, low-drift reference for 12-bit ADCs. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 4.096V reference for successive-approximation ADC conversion. Use Value: 0.1% accuracy and 64μVRMS noise ensure full-scale resolution without calibration, extending battery life via 60μA min current. | Use Scenario: Modular PLC analog input modules measuring 4–20mA sensor signals with 16-bit resolution. IC Role / Device Role / Timing Role: Precision shunt reference for isolated sigma-delta ADC front-end biasing in noisy factory environments. Use Value: ±100ppm/°C tempco maintains <±0.5 LSB error across –25°C to +70°C operating range; SC70 size eases thermal management. |
| Automotive Body Control | Battery Management Systems |
Use Scenario: In-cabin climate control sensors and lighting dimmer feedback circuits needing AEC-Q100-compliant references. IC Role / Device Role / Timing Role: Stable 4.096V reference for microcontroller ADC channels monitoring HVAC thermistors and potentiometers. Use Value: LM4040AEX3-4.1+T variant meets AEC-Q100 Grade 1; SC70 package withstands reflow and vibration without derating. | Use Scenario: Cell voltage monitoring in 3S–4S Li-ion packs where reference accuracy directly impacts state-of-charge estimation. IC Role / Device Role / Timing Role: High-stability shunt reference for differential amplifier gain-setting and ADC reference in fuel gauge ICs. Use Value: 120ppm long-term stability over 1000h ensures SOC accuracy remains within ±1% over product 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 |
|---|---|---|---|
| TLVH431AIDBZR | Adjustable 1.24V–18V output; 0.5% initial accuracy; SOT23-3; requires external resistors for 4.096V setting. | Not pin-compatible; needs redesign of feedback network; higher quiescent current (80μA min). | Select when adjustable output or higher voltage capability (>5V) is required; verify loop stability with external R-divider. |
| MAX6008AEUR+T | Fixed 4.096V; 0.2% accuracy; SC70-3; 75ppm/°C tempco; 100μA min current. | Same package and pinout; tighter tempco but looser initial accuracy; higher min current reduces ultra-low-power suitability. | Choose for improved temperature stability in extended-range industrial environments where 0.2% accuracy is acceptable. |
Compared with TLVH431AIDBZR and MAX6008AEUR+T, the LM4040AIX3-4.1+T offers superior initial accuracy (0.1% vs. 0.2%/0.5%) and lowest minimum operating current (60μA), making it optimal for battery-constrained, high-precision 4.096V reference applications where layout simplicity and long-term stability are critical.
Availability
LM4040AIX3-4.1+T is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, automotive body control, and battery management systems requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM4040AIX3-4.1+T 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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for demanding performance applications in industrial, medical, and communications markets.
The LM4040 product line delivers micropower, high-accuracy shunt voltage references optimized for space-constrained, battery-operated, and high-reliability systems requiring stable reference voltages without external compensation.
FAQ
What is the exact output voltage tolerance of LM4040AIX3-4.1+T at +25°C?
The LM4040AIX3-4.1+T has a nominal output voltage of 4.096V with a guaranteed tolerance of ±4.1mV (±0.1%) at +25°C, as specified in the Electrical Characteristics table for the A-grade device. This corresponds to a 4.0919V to 4.1001V range under standard test conditions, ensuring compatibility with 12-bit ADC full-scale design targets.
Can LM4040AIX3-4.1+T operate without an external output capacitor?
Yes, the LM4040AIX3-4.1+T is internally compensated and stable with any capacitive load-including zero capacitance-eliminating the need for external output capacitors. This feature reduces component count and PCB area, and avoids potential instability issues associated with capacitor ESR or aging effects in long-life applications.
What is the maximum operating temperature range for LM4040AIX3-4.1+T?
The LM4040AIX3-4.1+T is rated for operation from –40°C to +85°C. This is indicated by the "I" suffix in the ordering code (LM4040AIX3-4.1+T), distinguishing it from the "E" grade (–40°C to +125°C). Thermal derating begins above +70°C, with a junction-to-ambient thermal resistance of 340.4°C/W on a four-layer board.
How does the N.C. pin (Pin 3) affect LM4040AIX3-4.1+T layout and functionality?
Pin 3 of the LM4040AIX3-4.1+T is designated No Connection (N.C.) and must either be left unconnected or tied directly to Pin 2 (cathode). Connecting it to any other net may introduce leakage paths or parasitic coupling that degrades reference accuracy and long-term stability. The SC70-3 land pattern must isolate Pin 3 per Maxim's recommended footprint (Land Pattern Number 90-0208).
Is LM4040AIX3-4.1+T RoHS-compliant and lead-free?
Yes, the "+" in the part number LM4040AIX3-4.1+T denotes a lead(Pb)-free and RoHS-compliant package. The device meets JEDEC J-STD-609 Category 1 marking requirements and is compatible with standard Pb-free reflow profiles up to +260°C peak soldering temperature, as confirmed in the Absolute Maximum Ratings section.
LM4040AIX3-4.1+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 64µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4040AIX3-4.1+T FAQ
1.How can I place an order for LM4040AIX3-4.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AIX3-4.1+T 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 LM4040AIX3-4.1+T reliable?
The price and inventory of LM4040AIX3-4.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040AIX3-4.1+T is usually 5 days.
3.What payment methods are accepted for LM4040AIX3-4.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AIX3-4.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AIX3-4.1+T?
LM4040AIX3-4.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AIX3-4.1+T 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 LM4040AIX3-4.1+T?
For technical support, including LM4040AIX3-4.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AIX3-4.1+T requirements.
6.How does Aetrix verify that LM4040AIX3-4.1+T is sourced from the original manufacturer or authorized distributors?
All LM4040AIX3-4.1+T 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 LM4040AIX3-4.1+T meets industry standards.
7.What is the process for return or replacement of LM4040AIX3-4.1+T?
All LM4040AIX3-4.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AIX3-4.1+T, 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 LM4040AIX3-4.1+T part is unused and in its original packaging.
Return procedure for LM4040AIX3-4.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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