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Analog Devices Inc./Maxim Integrated LM4040DEM3-3.0-T
- Part No.:
- LM4040DEM3-3.0-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DEM3-3.0-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
LM4040DEM3-3.0-T from Maxim Integrated is a precision 3.000V two-terminal shunt voltage reference in SC70-3 package, featuring 1.0% initial accuracy, ±150ppm/°C temperature coefficient, 60μA to 15mA operating current range, and guaranteed operation from −40°C to +125°C. It delivers stable reverse-breakdown voltage for analog-to-digital converter (ADC) reference, portable battery-powered instrumentation, and industrial sensor signal conditioning.
For engineers reviewing the LM4040DEM3-3.0-T datasheet, LM4040DEM3-3.0-T pinout, LM4040DEM3-3.0-T application, or LM4040DEM3-3.0-T equivalent, key selection criteria include shunt current capability, temperature coefficient over extended range, no-output-capacitor stability, low noise (45µVRMS), and SC70 footprint compatibility in space-constrained designs.
Technical Context
The LM4040DEM3-3.0-T uses bandgap-based shunt regulation to maintain a precise 3.000V reverse breakdown voltage across its terminals when biased with 60μA–15mA cathode-to-anode current. Its internal laser-trimmed resistor network ensures factory-set accuracy without external calibration.
It operates without an output capacitor and remains stable under any capacitive load, eliminating layout sensitivity. The device's dynamic impedance is ≤1.1Ω at 1mA, enabling tight regulation despite load or supply transients within its −40°C to +125°C industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Breakdown Voltage | 3.000V ±30mV at +25°C (D-grade tolerance); supports 12-bit ADC reference with <0.3% full-scale error |
| Initial Accuracy | ±1.0% (D grade); enables single-point calibration elimination in cost-sensitive industrial sensors |
| Temperature Coefficient | ±150ppm/°C max over −40°C to +125°C; contributes ≤±18.5mV drift across full range |
| Operating Current Range | 60μA to 15mA; allows use with high-value source resistors in ultra-low-power IoT nodes |
| Wideband Noise | 45µVRMS (10Hz–10kHz); suitable for 16-bit SAR ADCs requiring sub-LSB reference stability |
| Dynamic Impedance | ≤1.1Ω at 1mA; maintains <1mV output shift during 1mA load steps |
| Long-Term Stability | 120ppm after 1000h; ensures <0.36mV drift over 1 year in sealed industrial enclosures |
Pinout & Package
LM4040DEM3-3.0-T is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23 equivalents. Pin 3 is unconnected (N.C.) and must remain floating or tied to pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode | Reverse-bias input terminal; connects to higher-potential node (e.g., VDD via source resistor) |
| 2 (−) | Anode | Reference ground terminal; ties to system ground or ADC reference low |
| 3 (N.C.) | No Connection | Must be left unconnected or shorted to pin 2; no internal bond wire or function |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% PCB real estate vs. SOT23 in wearables and medical patches |
| No output capacitor required | Eliminates BOM cost and layout risk from capacitor ESR/aging; stable with 0–10µF loads |
| Extended temperature range | −40°C to +125°C operation enables deployment in automotive engine control modules and outdoor industrial PLCs |
| Low 45µVRMS noise | Supports high-resolution data acquisition without external filtering, reducing component count |
| Shunt current scalability | 60μA minimum current allows microamp-level standby operation in battery-backed systems |
Applications
| Portable Medical Sensors | Industrial Process Transmitters |
|---|---|
Use Scenario: Battery-powered pulse oximeter with 16-bit ADC sampling analog photodiode signals. IC Role / Device Role / Timing Role: Precision 3.000V shunt reference for ADC voltage scaling and ratiometric sensor excitation. Use Value: Enables <±0.5 LSB integral nonlinearity with 45µVRMS noise and no external capacitor, extending battery life by minimizing quiescent current. | Use Scenario: 4–20mA loop-powered pressure transmitter operating in oil-field ambient temperatures up to +125°C. IC Role / Device Role / Timing Role: Stable 3.000V reference for DAC output scaling and sensor bridge excitation in harsh thermal environments. Use Value: Maintains <±18.5mV total drift over −40°C to +125°C, ensuring field calibration validity for 2+ years without recalibration. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: DIN-rail mounted electricity meter with isolated metrology IC requiring accurate 3.0V reference. IC Role / Device Role / Timing Role: Primary shunt reference for polyphase energy measurement ASIC with wide input voltage range. Use Value: Delivers ±1.0% initial accuracy and 120ppm long-term stability, meeting IEC 62053-21 Class 0.5 accuracy requirements over 10-year product lifetime. | Use Scenario: Under-hood BCM monitoring battery voltage, cabin temperature, and door lock status. IC Role / Device Role / Timing Role: Reference for microcontroller ADC inputs measuring 12V rail and NTC thermistors in high-temperature zones. Use Value: Operates reliably at +125°C ambient with derated power dissipation, avoiding thermal shutdown during summer engine bay operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C30IDBZR | 3.0V, ±0.5% initial accuracy, ±50ppm/°C tempco, SOT23-3, 60μA–15mA range | Better accuracy/tempco but limited to −40°C to +125°C only in C-grade; no SC70 option | Select for tighter tolerance where SC70 size is not mandatory and budget allows premium grade |
| REF3030AIDBZR | 3.0V, ±0.2% initial accuracy, ±50ppm/°C tempco, SOT23-3, 25μA–25mA range, 22µVRMS noise | Lower noise and wider current range but requires 1µF output capacitor for stability | Choose when ultra-low noise is critical and board space permits capacitor placement |
Compared with TL4050C30IDBZR and REF3030AIDBZR, the LM4040DEM3-3.0-T trades initial accuracy and tempco for ultra-compact SC70 packaging and capacitor-free operation-ideal for miniaturized, cost-optimized industrial and portable systems where ±1.0% tolerance is acceptable.
Availability
LM4040DEM3-3.0-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial process transmitters, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4040DEM3-3.0-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 is a semiconductor company specializing in analog and mixed-signal ICs for industrial, communications, computing, and consumer applications.
The LM4040 product line delivers micropower, precision shunt voltage references optimized for space-constrained, battery-operated, and high-reliability industrial systems requiring stable reference voltages without external components.
FAQ
What is the guaranteed operating temperature range for LM4040DEM3-3.0-T?
The LM4040DEM3-3.0-T is specified and guaranteed over −40°C to +125°C. This extended range is confirmed in the Ordering Information table (page 13) and Absolute Maximum Ratings section, making it suitable for under-hood automotive and industrial control applications where ambient temperatures exceed +85°C.
Does LM4040DEM3-3.0-T require an external output capacitor?
No, the LM4040DEM3-3.0-T does not require an external output capacitor and remains stable with any capacitive load, including 0–10µF. This is explicitly stated in the General Description and Applications Information sections, simplifying layout and reducing BOM count compared to series references like REF3030.
What is the minimum operating current for LM4040DEM3-3.0-T?
The minimum operating current for LM4040DEM3-3.0-T is 60μA, as specified in the Electrical Characteristics table for the 3.000V version (page 4). This value ensures stable regulation and is critical for designing low-quiescent-current source resistor networks in battery-powered devices.
How does the pin configuration of LM4040DEM3-3.0-T differ from standard three-terminal references?
The LM4040DEM3-3.0-T has a two-terminal functional configuration: pin 1 is cathode (+), pin 2 is anode (−), and pin 3 is N.C. (no connection). Unlike three-terminal series references, it functions as a shunt device-current flows through it to ground-and pin 3 must remain unconnected or tied to pin 2 per the Pin Configuration diagram (page 11).
What is the wideband noise specification for LM4040DEM3-3.0-T?
The wideband noise of LM4040DEM3-3.0-T is 45µVRMS measured from 10Hz to 10kHz at 100µA operating current, as documented in the Electrical Characteristics table for the 3.000V version (page 4). This performance supports 16-bit ADC applications without additional filtering.
LM4040DEM3-3.0-T 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:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 45µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 70 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040DEM3-3.0-T FAQ
1.How can I place an order for LM4040DEM3-3.0-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DEM3-3.0-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 LM4040DEM3-3.0-T reliable?
The price and inventory of LM4040DEM3-3.0-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DEM3-3.0-T is usually 5 days.
3.What payment methods are accepted for LM4040DEM3-3.0-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DEM3-3.0-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DEM3-3.0-T?
LM4040DEM3-3.0-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DEM3-3.0-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 LM4040DEM3-3.0-T?
For technical support, including LM4040DEM3-3.0-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DEM3-3.0-T requirements.
6.How does Aetrix verify that LM4040DEM3-3.0-T is sourced from the original manufacturer or authorized distributors?
All LM4040DEM3-3.0-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 LM4040DEM3-3.0-T meets industry standards.
7.What is the process for return or replacement of LM4040DEM3-3.0-T?
All LM4040DEM3-3.0-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DEM3-3.0-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 LM4040DEM3-3.0-T part is unused and in its original packaging.
Return procedure for LM4040DEM3-3.0-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040DEM3-3.0-T Tags
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