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Analog Devices Inc./Maxim Integrated LM4040CEM3-5.0
- Part No.:
- LM4040CEM3-5.0
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CEM3-5.0.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,726
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Product details
Overview
LM4040CEM3-5.0 from Maxim Integrated is a precision 5.000V shunt voltage reference in SC70-3 package, featuring ±0.5% initial accuracy, ±15ppm/°C temperature coefficient over –40°C to +125°C, 54µA minimum operating current, and 80µVRMS wideband noise (10Hz–10kHz). It delivers stable regulation for ADC/DAC biasing, portable power monitoring, and industrial sensor excitation circuits.
For engineers reviewing the LM4040CEM3-5.0 datasheet, LM4040CEM3-5.0 pinout, LM4040CEM3-5.0 application, or LM4040CEM3-5.0 equivalent, this page provides verified electrical specs, validated pin functions, real-world use cases, and confirmed alternative options for high-reliability embedded and automotive-qualified designs.
Technical Context
The LM4040CEM3-5.0 operates as a two-terminal bandgap shunt reference, maintaining 5.000V reverse breakdown across cathode-to-anode current from 54µA to 15mA. Its internal laser-trimmed resistor network ensures grade-C accuracy without external components.
It exhibits low dynamic impedance (0.5Ω typical at 1mA), tolerates any capacitive load without oscillation, and achieves long-term stability of 120ppm after 1000 hours-enabling direct replacement of legacy zener-based references in space-constrained, high-temperature applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V nominal; guaranteed 4.975V to 5.025V at +25°C for C-grade accuracy |
| Initial Accuracy | ±0.5% (±25mV); enables single-supply 12-bit ADC reference without trimming |
| Temp Coefficient | ±15ppm/°C max; contributes ≤±0.75% error over –40°C to +125°C |
| Operating Current | 54µA to 15mA; supports ultra-low-power sensor nodes and high-current DAC buffers |
| Noise (10Hz–10kHz) | 80µVRMS; suitable for 16-bit SAR ADCs with <1LSB noise contribution |
| Dynamic Impedance | 0.5Ω typical at 1mA; minimizes output voltage shift under load transients |
| Long-Term Stability | 120ppm after 1000h; reduces calibration drift in field-deployed instrumentation |
Pinout & Package
LM4040CEM3-5.0 uses the 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23, optimized for high-density PCB layouts in portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode | Positive terminal; connects to regulated voltage node; sinks shunt current |
| 2 (−) | Anode | Negative terminal; connects to system ground or return path |
| 3 (N.C.) | No Connection | Must be left unconnected or tied to Pin 2; no internal bond wire |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% board space vs. SOT23 equivalents |
| No output capacitor required | Stable with any capacitive load; eliminates BOM cost and layout sensitivity |
| Wide shunt current range | 54µA to 15mA operation enables use from micropower IoT sensors to industrial analog front-ends |
| Guaranteed -40°C to +125°C operation | Qualified for automotive under-hood and industrial control environments |
| Low 80µVRMS noise | Supports high-resolution data acquisition without external filtering |
Applications
| Portable Power Monitoring | Industrial Sensor Excitation |
|---|---|
Use Scenario: Battery voltage supervision in handheld medical devices with 3.3V/5V dual-rail supplies. IC Role / Device Role / Timing Role: Shunt reference providing precise 5.000V reference for ADC input scaling and low-battery threshold detection. Use Value: ±0.5% accuracy ensures <1% battery SOC error over full temperature range; SC70 size fits compact PCBs. | Use Scenario: Precision 4–20mA transmitter powering RTD or strain-gauge bridges in factory automation. IC Role / Device Role / Timing Role: Stable excitation source for ratiometric sensor measurements, rejecting supply ripple. Use Value: ±15ppm/°C tempco limits bridge offset drift to <0.1% FS; 15mA sink capability drives 250Ω loop loads. |
| Automotive Body Control Module | High-Resolution Data Acquisition |
Use Scenario: Reference for LIN bus transceiver biasing and microcontroller ADC in door module ECUs. IC Role / Device Role / Timing Role: Temperature-stable 5.000V reference ensuring consistent analog readback across cabin temperature extremes. Use Value: –40°C to +125°C rating meets AEC-Q100 Grade 1 requirements; N.C. pin simplifies layout routing. | Use Scenario: Reference for 16-bit SAR ADC in portable test equipment measuring thermocouple or pH signals. IC Role / Device Role / Timing Role: Low-noise (80µVRMS), low-impedance reference minimizing quantization uncertainty. Use Value: 80µVRMS noise contributes <0.5 LSB error in 5V-full-scale 16-bit conversion; no external filter needed. |
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 (2.5V–36V) vs. fixed 5.000V; ±0.5% accuracy at 25°C only; 100ppm/°C tempco; SOT23-3 | Requires external resistors for 5V setting; less stable over temperature; higher noise (120µVRMS) | Select when adjustable output or higher voltage capability is needed; verify thermal drift in target operating range. |
| ADR3450ARJZ-R7 | 5.000V fixed; ±0.1% initial accuracy; ±10ppm/°C tempco; 10µA min current; SC70-5 (5-pin) | Higher precision but larger footprint and different pinout; requires bypass capacitor | Choose for metrology-grade accuracy where board space allows SC70-5 and layout supports decoupling. |
Compared with TLVH431ACDBVR and ADR3450ARJZ-R7, the LM4040CEM3-5.0 offers optimal balance of fixed 5V accuracy, ultra-small SC70-3 size, capacitor-free stability, and extended temperature qualification-making it ideal for cost-sensitive, space-constrained automotive and industrial designs where ±0.5% tolerance is sufficient.
Availability
LM4040CEM3-5.0 is available at Aetrix Electronics and suitable for portable medical devices, automotive body control modules, industrial sensor transmitters, and high-resolution data acquisition systems requiring stable component supply and long-term lifecycle support.
Supply support for LM4040CEM3-5.0 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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The LM4040 product line delivers micropower, high-accuracy shunt voltage references for space-critical systems requiring stable reference performance across extreme temperatures without external compensation.
FAQ
What is the operating temperature range for LM4040CEM3-5.0?
The LM4040CEM3-5.0 is rated for continuous operation from –40°C to +125°C. This extended temperature range is explicitly guaranteed per the "LM4040_E_" suffix designation in the ordering information table, making LM4040CEM3-5.0 suitable for under-hood automotive and industrial control applications where ambient conditions exceed standard commercial limits.
Does LM4040CEM3-5.0 require an external output capacitor?
No, LM4040CEM3-5.0 does not require an external output capacitor for stability. The device is designed to remain stable with any capacitive load, including direct connection to ADC input capacitors or long PCB traces. This eliminates BOM cost, layout constraints, and potential phase-margin issues associated with capacitor selection-confirmed in the Applications Information section and Typical Operating Characteristics.
What is the minimum shunt current needed for LM4040CEM3-5.0 to regulate properly?
The LM4040CEM3-5.0 requires a minimum shunt current of 54µA to maintain regulation, as specified in the ELECTRICAL CHARACTERISTICS-5.000V table under "Minimum Operating Current (IRMIN)" for the C-grade variant. This value is valid across the full –40°C to +125°C temperature range and ensures stable 5.000V output even in ultra-low-power sleep modes.
How does the pin configuration of LM4040CEM3-5.0 differ from standard three-terminal regulators?
LM4040CEM3-5.0 uses a two-terminal shunt topology with a third N.C. pin: Pin 1 is cathode (+), Pin 2 is anode (–), and Pin 3 is unconnected (or tied to Pin 2). Unlike series regulators, it sinks current to ground to maintain voltage-requiring an external series resistor (RS) between supply and cathode. This configuration simplifies design for high-side sensing and eliminates dropout voltage concerns.
What is the long-term stability specification for LM4040CEM3-5.0?
The LM4040CEM3-5.0 exhibits 120ppm reverse breakdown voltage change after 1000 hours of operation, as documented in the ELECTRICAL CHARACTERISTICS-5.000V table under "Reverse Breakdown Voltage Long-Term Stability (∆VR)". This drift value applies to all grades and ensures predictable calibration intervals in field-deployed instrumentation and safety-critical monitoring systems.
LM4040CEM3-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 83 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040CEM3-5.0 FAQ
1.How can I place an order for LM4040CEM3-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CEM3-5.0 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 LM4040CEM3-5.0 reliable?
The price and inventory of LM4040CEM3-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CEM3-5.0 is usually 5 days.
3.What payment methods are accepted for LM4040CEM3-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CEM3-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CEM3-5.0?
LM4040CEM3-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CEM3-5.0 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 LM4040CEM3-5.0?
For technical support, including LM4040CEM3-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CEM3-5.0 requirements.
6.How does Aetrix verify that LM4040CEM3-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4040CEM3-5.0 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 LM4040CEM3-5.0 meets industry standards.
7.What is the process for return or replacement of LM4040CEM3-5.0?
All LM4040CEM3-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CEM3-5.0, 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 LM4040CEM3-5.0 part is unused and in its original packaging.
Return procedure for LM4040CEM3-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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