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Analog Devices Inc./Maxim Integrated LM4040DEX3-5.0
- Part No.:
- LM4040DEX3-5.0
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4040DEX3-5.0.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:2,460
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Product details
Overview
LM4040DEX3-5.0 from Maxim Integrated is a precision 5.000V, two-terminal shunt voltage reference in SC70-3 package with 1.0% initial accuracy, ±100ppm/°C temperature coefficient (max), and guaranteed operation from -40°C to +125°C. It delivers stable reverse breakdown voltage across 60μA–15mA shunt current and is used for ADC/DAC reference, power supply monitoring, and battery management in space-constrained portable electronics.
For engineers reviewing the LM4040DEX3-5.0 datasheet, LM4040DEX3-5.0 pinout, LM4040DEX3-5.0 application, or LM4040DEX3-5.0 equivalent, key selection criteria include its 5.000V fixed output, SC70-3 footprint, 1.0% tolerance grade, wide operating current range, and no-output-capacitor-required stability-critical for low-power, high-reliability embedded systems.
Technical Context
The LM4040DEX3-5.0 uses bandgap-based shunt regulation to maintain a precise 5.000V reverse breakdown voltage without external capacitors. Its internal laser-trimmed resistor network ensures factory-set accuracy, while dynamic impedance of ≤1.5Ω at 1mA enables tight regulation under load transients.
Designed for extended temperature operation, it guarantees performance over -40°C to +125°C with a maximum temperature coefficient of ±100ppm/°C and long-term stability of 120ppm over 1000 hours-making it suitable for industrial and automotive-grade sensing and control circuits where thermal drift must be tightly bounded.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±50mV at +25°C (D-grade tolerance); defines reference level for 12-bit+ ADCs requiring ≤0.1% full-scale error. |
| Initial Accuracy | ±1.0% (D-grade); corresponds to ±50mV absolute error at 5V-suitable for non-critical biasing and supervisory functions. |
| Temp Coefficient | ±100ppm/°C max; contributes ≤±12.5mV drift over -40°C to +125°C-enables stable reference in uncontrolled ambient environments. |
| Shunt Current Range | 60μA to 15mA; supports ultra-low-power sleep modes and high-current regulation without external components. |
| Dynamic Impedance | ≤1.5Ω at 1mA; ensures <15mV output shift under 10mA load step-critical for fast transient response in SMPS feedback loops. |
| Wideband Noise | 80µVRMS (10Hz–10kHz); limits noise contribution in precision analog front-ends and sensor signal chains. |
| Long-Term Stability | 120ppm over 1000h; translates to ~0.6mV drift after 6 weeks-supports calibration-interval planning in test equipment. |
Pinout & Package
The LM4040DEX3-5.0 is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23 equivalents. Pin 3 is no-connect and must remain unconnected or tied to pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode (cathode-side terminal in shunt configuration) | Connected to regulated output node; sinks current to maintain 5.000V across load and series resistor. |
| 2 (–) | Cathode (anode-side terminal in shunt configuration) | Reference ground return path; forms voltage drop with pin 1 to define VSHUNT. |
| 3 (N.C.) | No connection | Must be left floating or shorted to pin 2; not internally bonded-incorrect connection risks parametric deviation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 package | 1.8mm × 1.8mm footprint enables placement in dense PCB layouts-ideal for wearables and miniaturized IoT sensors. |
| No output capacitor required | Stable with any capacitive load up to 10µF; eliminates BOM cost and layout area for decoupling caps in battery-powered designs. |
| Extended temperature range | -40°C to +125°C operation supports deployment in engine control units, industrial PLCs, and outdoor telemetry hardware. |
| Low 80µVRMS noise | Enables use in 16-bit SAR ADC references where noise floor must stay below 1 LSB (e.g., 5V/65536 ≈ 76µV). |
| 15mA max shunt current | Supports direct regulation of small loads (e.g., op-amp bias networks) without external pass devices-reducing component count. |
Applications
| Portable Medical Sensors | Industrial Data Acquisition |
|---|---|
Use Scenario: Battery-powered glucose meter with integrated 12-bit ADC sampling analog sensor output. IC Role / Device Role / Timing Role: Provides stable 5.000V reference for ADC conversion, ensuring consistent measurement resolution across battery discharge cycle. Use Value: 1.0% accuracy and ±100ppm/°C TC enable ±0.5% total measurement error over temperature-meeting ISO 15197 clinical accuracy requirements. | Use Scenario: 4–20mA loop-powered transmitter in factory automation with local analog signal conditioning. IC Role / Device Role / Timing Role: Supplies precision reference for DAC generating loop current setpoint and for sensor excitation voltage. Use Value: SC70-3 size allows integration into compact DIN-rail modules; 125°C rating permits operation near hot motor drives without derating. |
| Automotive Cabin Control | Smart Energy Meters |
Use Scenario: HVAC control unit measuring cabin temperature and humidity using analog-output sensors. IC Role / Device Role / Timing Role: References microcontroller's internal ADC and powers analog front-end op-amps in harsh thermal environment. Use Value: Guaranteed -40°C to +125°C operation avoids cold-start failures and thermal shutdown during summer parking-critical for ASIL-B functional safety compliance. | Use Scenario: Revenue-grade electricity meter requiring metrology-grade voltage reference for polyphase energy calculation. IC Role / Device Role / Timing Role: Sets reference for 24-bit delta-sigma ADC measuring grid voltage with <0.1% total error budget. Use Value: 120ppm long-term stability supports 10-year calibration intervals per IEC 62053-21, reducing field maintenance costs. |
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; SOT23-3; 30ppm/°C TC | Requires external resistors for 5V setting; lower noise (45µVRMS) but higher minimum cathode current (80μA) | Choose when adjustable output or tighter TC is needed; verify layout compatibility with 3-pin SOT23 footprint. |
| MAX6008AEUR+T | Fixed 5.0V; 0.2% accuracy; SC70-3; 50ppm/°C TC; 75µVRMS noise | Higher accuracy and lower TC, but narrower 100μA–10mA current range and +85°C max temp | Prefer for lab-grade instrumentation where precision outweighs temperature range; not suitable for under-hood automotive use. |
Compared with TLVH431ACDBVR and MAX6008AEUR+T, the LM4040DEX3-5.0 trades accuracy and TC for wider temperature coverage and simpler fixed-voltage implementation-making it optimal for cost-sensitive, thermally demanding industrial and automotive edge nodes where ±1% reference error is acceptable.
Availability
LM4040DEX3-5.0 is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition systems, and automotive cabin controls requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4040DEX3-5.0 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 is a semiconductor company specializing in analog and mixed-signal ICs for power management, sensing, and communication applications.
The LM4040 product line delivers precision micropower shunt voltage references optimized for space-constrained, battery-operated, and high-reliability systems-emphasizing low quiescent current, small footprint, and robust thermal performance.
FAQ
What is the guaranteed operating temperature range for LM4040DEX3-5.0?
The LM4040DEX3-5.0 is specified for continuous operation from -40°C to +125°C. This extended range is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section for the "E" temperature grade. The device maintains its 5.000V output and 1.0% initial accuracy across this full span, making LM4040DEX3-5.0 suitable for under-hood automotive and industrial control applications where ambient temperatures exceed +85°C.
Can LM4040DEX3-5.0 operate without an external output capacitor?
Yes, LM4040DEX3-5.0 is designed to be stable with any capacitive load-including zero capacitance-and does not require an external output capacitor for frequency stability. This is explicitly stated in the General Description and Applications Information sections. The internal architecture ensures phase margin is maintained even with 10µF or more on the output, simplifying design and reducing BOM count in space-limited LM4040DEX3-5.0 implementations.
What is the minimum shunt current required for LM4040DEX3-5.0 to regulate properly?
The LM4040DEX3-5.0 requires a minimum shunt current of 60μA to maintain regulation, as specified in the Electrical Characteristics table for the 5.000V version. Below this threshold, output voltage may deviate beyond datasheet limits. For reliable startup and low-current operation, design the series resistor (RS) to ensure ≥60μA flows through LM4040DEX3-5.0 even at minimum supply voltage and maximum load current.
How does the pin configuration of LM4040DEX3-5.0 differ from standard zener diodes?
Unlike traditional two-terminal zeners, LM4040DEX3-5.0 uses a three-pin SC70 package: pin 1 is the anode (+), pin 2 is the cathode (–), and pin 3 is no-connect (N.C.). Pin 3 must be left unconnected or tied to pin 2-never driven or loaded-as it is not internally bonded. This 3-pin structure enables standardized pick-and-place handling while retaining true two-terminal electrical behavior between pins 1 and 2, distinguishing LM4040DEX3-5.0 from legacy zener packages.
Is LM4040DEX3-5.0 RoHS-compliant and lead-free?
Yes, LM4040DEX3-5.0 is RoHS-compliant and lead-free, as indicated by the "+" suffix in its ordering code (e.g., LM4040DEX3-5.0+T) and explicitly noted in the Ordering Information section. Maxim Integrated confirms all SC70-packaged LM4040 variants meet JEDEC J-STD-020 moisture sensitivity level 1 and comply with EU RoHS Directive 2011/65/EU, making LM4040DEX3-5.0 suitable for green manufacturing and export to regulated markets.
LM4040DEX3-5.0 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:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 85 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4040DEX3-5.0 FAQ
1.How can I place an order for LM4040DEX3-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DEX3-5.0 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 LM4040DEX3-5.0 reliable?
The price and inventory of LM4040DEX3-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DEX3-5.0 is usually 5 days.
3.What payment methods are accepted for LM4040DEX3-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DEX3-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DEX3-5.0?
LM4040DEX3-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DEX3-5.0 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 LM4040DEX3-5.0?
For technical support, including LM4040DEX3-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DEX3-5.0 requirements.
6.How does Aetrix verify that LM4040DEX3-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4040DEX3-5.0 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 LM4040DEX3-5.0 meets industry standards.
7.What is the process for return or replacement of LM4040DEX3-5.0?
All LM4040DEX3-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DEX3-5.0, 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 LM4040DEX3-5.0 part is unused and in its original packaging.
Return procedure for LM4040DEX3-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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