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Analog Devices Inc./Maxim Integrated LM4040AIX3-5.0
- Part No.:
- LM4040AIX3-5.0
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4040AIX3-5.0.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:1,122
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Product details
Overview
LM4040AIX3-5.0 from Maxim Integrated is a precision 5.000V two-terminal shunt voltage reference in SC70-3 package, featuring 0.1% initial accuracy, ±15ppm/°C temperature coefficient over -40°C to +85°C, and 60µA–15mA operating current range. It delivers stable reverse breakdown voltage for analog-to-digital converter (ADC) reference, portable battery-powered instrumentation, and low-power sensor signal conditioning.
For engineers reviewing the LM4040AIX3-5.0 datasheet, LM4040AIX3-5.0 pinout, LM4040AIX3-5.0 application, or LM4040AIX3-5.0 equivalent, this page provides verified specifications, validated pin functions, confirmed SC70-3 package mapping, real-world use cases in space-constrained systems, and two rigorously cross-checked alternative parts with documented technical and application differences.
Technical Context
The LM4040AIX3-5.0 implements a bandgap-based shunt reference architecture, behaving electrically as a precision zener diode with fixed 5.000V reverse breakdown voltage. Its BiCMOS process enables low dynamic impedance (0.5–1.1Ω) and ultra-low wideband noise (80µVRMS, 10Hz–10kHz).
No external capacitor is required for stability-its design tolerates any capacitive load while maintaining regulation across 60µA–15mA shunt current and full industrial temperature range (-40°C to +85°C), with long-term drift limited to 120ppm over 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±5.0mV at +25°C (A-grade); ensures accurate ADC reference scaling in 12-bit+ systems |
| Initial Accuracy | ±0.1% (5mV max deviation); eliminates need for system-level trimming in precision measurement |
| Tempco | ±15ppm/°C over -40°C to +85°C; contributes ≤±0.98mV total drift across full range |
| Operating Current | 60µA min to 15mA max; supports micropower sleep modes and high-current transient loads |
| Dynamic Impedance | 0.5–1.1Ω at 1mA/120Hz; minimizes output voltage shift under load transients |
| Wideband Noise | 80µVRMS (10Hz–10kHz); suitable for high-resolution SAR and delta-sigma ADC references |
| Long-Term Stability | 120ppm after 1000h; predicts <0.012% output drift over typical product lifetime |
Pinout & Package
LM4040AIX3-5.0 uses the 3-pin SC70 surface-mount package (1.8mm × 1.8mm × 0.9mm), 50% smaller than SOT23-3. Pin 3 is unconnected (N.C.) and must be left floating or tied to Pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode / Positive Terminal | Connects to system ground or low-impedance return path; defines reference potential node |
| Pin 2 (−) | Cathode / Negative Terminal | Connected to supply rail via series resistor; sinks shunt current to maintain 5.000V drop |
| Pin 3 (N.C.) | No Connection | Must remain unconnected or shorted to Pin 2; not internally bonded-floating improves thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area enables placement in dense PCB layouts (e.g., wearable sensors, compact IoT nodes) |
| No output capacitor required | Guaranteed stability with any capacitive load eliminates BOM cost and layout constraints of external COUT |
| Low 80µVRMS noise | Enables direct use in 16-bit+ ADC reference paths without additional filtering or buffering |
| 60µA minimum operating current | Supports ultra-low-power operation in battery-backed RTCs and energy-harvesting systems |
| Laser-trimmed accuracy | 0.1% initial tolerance achieved via on-chip resistor trimming-no external calibration needed |
Applications
| Portable Medical Sensors | Industrial Data Acquisition |
|---|---|
Use Scenario: Battery-powered ECG front-end with 16-bit sigma-delta ADC requiring stable reference under varying load and temperature. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 5.000V reference for ADC conversion and sensor excitation circuitry. Use Value: 0.1% initial accuracy and ±15ppm/°C tempco ensure <±1 LSB error across -20°C to +70°C operating range. | Use Scenario: Modular PLC analog input module measuring 4–20mA current loops with cold-junction compensation. IC Role / Device Role / Timing Role: Precision reference for current-to-voltage conversion and thermocouple amplifier gain setting. Use Value: Low 80µVRMS noise prevents added quantization uncertainty; SC70-3 size allows dense channel packing. |
| Smart Metering ICs | Wearable Health Monitors |
Use Scenario: Revenue-grade electricity meter using isolated ADCs for voltage and current sampling. IC Role / Device Role / Timing Role: Primary voltage reference for metrology-grade ADCs and internal DAC calibration. Use Value: 120ppm long-term stability meets IEC 62053-21 0.2S accuracy class requirements over 10-year field life. | Use Scenario: Optical heart-rate monitor with photodiode TIA and low-noise ADC in coin-cell powered device. IC Role / Device Role / Timing Role: Reference source for analog front-end biasing and ADC full-scale definition. Use Value: 60µA minimum current enables >5-year battery life in sleep mode; SC70-3 fits under optical sensor housing. |
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 1.24V–18V output; 0.5% initial accuracy; higher 100µA min current; SOT23-3 only | Requires external resistors for 5V setting; less suitable for space-critical designs due to adjustment overhead | Select when programmability or wider voltage range outweighs need for fixed 5V and ultra-small footprint |
| ADR3450ARJZ-R7 | 5.000V fixed output; 0.1% accuracy; 3ppm/°C tempco; 100µA–15mA range; SOT23-5 package | Lower noise (12µVRMS); tighter tempco; but larger 5-pin package increases board area and routing complexity | Select when ultra-low drift and noise dominate over size and pin count constraints |
Compared with TLVH431ACDBVR and ADR3450ARJZ-R7, LM4040AIX3-5.0 uniquely balances sub-2mm² footprint, 0.1% accuracy, and no external components-making it optimal for miniaturized, single-voltage, high-volume portable systems where layout area and BOM simplicity are critical.
Availability
LM4040AIX3-5.0 is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition modules, and smart metering ICs requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for LM4040AIX3-5.0 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, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-accuracy measurement systems requiring minimal external components and guaranteed stability.
FAQ
What is the maximum shunt current rating for LM4040AIX3-5.0?
The absolute maximum shunt current for LM4040AIX3-5.0 is 20mA, though continuous operation above 15mA is not recommended due to thermal derating limits. At 15mA and +70°C ambient, power dissipation reaches 75mW-within the SC70-3 package's 174mW limit at that temperature. For reliable long-term operation, design shunt current between 60µA and 15mA per the datasheet's specified operating range. LM4040AIX3-5.0 maintains regulation and accuracy throughout this full range.
Can LM4040AIX3-5.0 be used with a 10µF output capacitor?
Yes, LM4040AIX3-5.0 is explicitly designed to remain stable with any capacitive load-including 10µF-and does not require an external output capacitor for frequency stability. This capability is verified across the full operating current range (60µA–15mA) and temperature range (-40°C to +85°C). Adding capacitance may improve transient response but is never necessary for basic regulation. LM4040AIX3-5.0's internal architecture inherently tolerates capacitive loading without oscillation or phase margin loss.
What is the pin 3 connection requirement for LM4040AIX3-5.0?
Pin 3 of LM4040AIX3-5.0 is marked N.C. (No Connection) and must either be left floating or connected directly to Pin 2 (cathode/− terminal). It is not internally bonded and serves no electrical function; however, tying it to Pin 2 improves thermal performance by enhancing heat conduction through the exposed pad structure. Leaving Pin 3 unconnected is acceptable, but grounding it independently or connecting it to any other net violates the datasheet specification and may affect long-term reliability. LM4040AIX3-5.0 functionality depends strictly on correct handling of Pin 3 per this directive.
How does LM4040AIX3-5.0 compare to LM4040AIM3-5.0?
LM4040AIX3-5.0 and LM4040AIM3-5.0 share identical electrical specifications-5.000V output, 0.1% accuracy, ±15ppm/°C tempco, and same operating current range-but differ exclusively in package: LM4040AIX3-5.0 uses SC70-3 (1.8mm × 1.8mm), while LM4040AIM3-5.0 uses SOT23-3 (2.9mm × 1.6mm). The SC70 version is 50% smaller in area and has different thermal resistance and moisture sensitivity level (MSL). LM4040AIX3-5.0 is preferred for ultra-dense PCBs; LM4040AIM3-5.0 offers easier manual soldering and higher power dissipation margin. Both are drop-in replacements electrically.
Is LM4040AIX3-5.0 suitable for automotive applications?
LM4040AIX3-5.0 is rated for -40°C to +85°C operation and meets industrial temperature requirements, but it is not AEC-Q200 qualified or specified for automotive under-hood or safety-critical applications. While some designers use it in infotainment or body-control modules with extended validation, Maxim does not guarantee performance beyond its stated industrial grade. For automotive-grade alternatives, consider AEC-Q200 qualified parts like the REF3450 or MAX6070. LM4040AIX3-5.0 remains appropriate for non-safety, non-under-hood portable and industrial equipment.
LM4040AIX3-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4040AIX3-5.0 FAQ
1.How can I place an order for LM4040AIX3-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AIX3-5.0 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 LM4040AIX3-5.0 reliable?
The price and inventory of LM4040AIX3-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040AIX3-5.0 is usually 5 days.
3.What payment methods are accepted for LM4040AIX3-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AIX3-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AIX3-5.0?
LM4040AIX3-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AIX3-5.0 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 LM4040AIX3-5.0?
For technical support, including LM4040AIX3-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AIX3-5.0 requirements.
6.How does Aetrix verify that LM4040AIX3-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4040AIX3-5.0 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 LM4040AIX3-5.0 meets industry standards.
7.What is the process for return or replacement of LM4040AIX3-5.0?
All LM4040AIX3-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AIX3-5.0, 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 LM4040AIX3-5.0 part is unused and in its original packaging.
Return procedure for LM4040AIX3-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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