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Analog Devices Inc./Maxim Integrated LM4040AEM3-4.1+T
- Part No.:
- LM4040AEM3-4.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040AEM3-4.1+T.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,974
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Product details
Overview
LM4040AEM3-4.1+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 +125°C. It delivers stable reverse breakdown voltage with 60μA–15mA shunt current capability and low 64μVRMS wideband noise (10Hz–10kHz), ideal for high-accuracy ADC/DAC biasing in automotive sensor modules.
For engineers reviewing the LM4040AEM3-4.1+T datasheet, LM4040AEM3-4.1+T pinout, LM4040AEM3-4.1+T application, or LM4040AEM3-4.1+T equivalent, key selection criteria include its A-grade accuracy, extended temperature range, SC70 footprint compatibility, and absence of required output capacitance in space-constrained designs.
Technical Context
The LM4040AEM3-4.1+T uses laser-trimmed bandgap circuitry to maintain a precise 4.096V reverse breakdown voltage across its cathode-anode terminals. Its internal architecture eliminates need for external stabilization capacitors while tolerating arbitrary capacitive loads - a critical advantage over series references in battery-powered systems.
Operating as a two-terminal shunt device, it sinks current through an external resistor to regulate voltage; minimum operating current is 73μA at TA = +25°C, and dynamic impedance remains ≤1.0Ω at 1mA, ensuring minimal voltage shift under load transients across the full -40°C to +125°C range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; ±4.1mV (±0.1%) tolerance at +25°C ensures direct compatibility with 12-bit ADCs requiring exact VREF scaling. |
| Initial Accuracy | 0.1% max; enables single-point calibration elimination in factory-trimmed instrumentation front-ends. |
| Temp Coefficient | ±100ppm/°C max; guarantees ≤±0.414V drift over -40°C to +125°C, supporting automotive under-hood applications. |
| Shunt Current Range | 73μA to 15mA; allows design flexibility with high-value source resistors for ultra-low-power wake-up circuits. |
| Wideband Noise | 64μVRMS (10Hz–10kHz); limits quantization error in 16-bit SAR ADC reference paths without additional filtering. |
| Dynamic Impedance | ≤1.0Ω at 1mA; maintains <1mV output shift during 1mA load steps, critical for precision DAC buffer stability. |
| Long-Term Stability | 120ppm after 1000h; supports 10-year field reliability in industrial control loop references. |
Pinout & Package
LM4040AEM3-4.1+T is housed in a RoHS-compliant 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23 equivalents. Pin 3 is NC and must be left unconnected or tied to pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode | Reverse-biased terminal; connects to regulated voltage node and current-sinking resistor. |
| 2 (–) | Anode | Reference ground return; forms low-impedance path for shunt current and defines output voltage reference point. |
| 3 (N.C.) | No Connection | Must remain floating or shorted to pin 2; no internal connection - violation causes parametric deviation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% PCB real estate vs. SOT23, enabling dense portable medical sensor layouts. |
| No output capacitor required | Eliminates BOM cost and layout risk associated with capacitor ESR/aging effects in battery-backed systems. |
| Tolerates any capacitive load | Enables direct connection to ADC input caps or long traces without oscillation - verified up to 10µF. |
| AEC-Q100 qualified (Grade 1) | Validated for automotive powertrain and ADAS modules requiring -40°C to +125°C ambient operation. |
| Low 64μVRMS noise | Reduces effective number of bits (ENOB) degradation in 16-bit data acquisition systems by <0.2 LSB. |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
Use Scenario: Reference voltage for MEMS pressure sensors in HVAC control units exposed to under-dash temperatures up to +125°C. IC Role / Device Role / Timing Role: Two-terminal shunt reference providing stable 4.096V bias to sensor signal conditioning amplifier and 12-bit ADC. Use Value: A-grade accuracy and ±100ppm/°C TC ensure <±0.5% total error over full automotive temperature range without recalibration. | Use Scenario: Precision reference for ECG analog front-end in handheld patient monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-current shunt reference supplying 4.096V to 16-bit delta-sigma ADC with sub-10μA quiescent draw. Use Value: 73μA minimum operating current enables >5-year battery life; SC70 size fits within 12mm × 12mm PCB constraint. |
| Industrial PLC Analog Inputs | Test & Measurement Equipment |
Use Scenario: Calibration-grade reference for 4–20mA loop-powered transmitters in factory automation cabinets. IC Role / Device Role / Timing Role: Shunt reference generating 4.096V for DAC-based current output stage with 0.1% system gain accuracy. Use Value: 120ppm long-term stability meets IEC 61000-4-30 Class A requirements for 10-year field calibration intervals. | Use Scenario: Primary reference in benchtop multimeters requiring traceable 4.096V scaling for 5½-digit resolution. IC Role / Device Role / Timing Role: High-stability shunt reference feeding dual-slope integrator and auto-zero amplifier stages. Use Value: 64μVRMS noise contributes <0.005% RMS error - below 10ppm measurement uncertainty threshold. |
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; 100ppm/°C TC; SOT23-3 package. | Requires two external resistors for 4.096V setting; higher minimum cathode current (80μA). | Select when programmability or higher voltage headroom is needed; not drop-in due to topology and accuracy difference. |
| MAX6008AEUR+T | Fixed 4.096V; 0.2% initial accuracy; 75ppm/°C TC; SC70-3 package; 100μA min current. | Slightly lower accuracy but superior TC; same footprint and pinout; requires 27μA more minimum current. | Choose for tighter thermal drift where 0.2% absolute error is acceptable; identical board layout. |
Compared with TLVH431ACDBVR and MAX6008AEUR+T, LM4040AEM3-4.1+T offers the highest initial accuracy (0.1%) and lowest noise (64μVRMS) in SC70, making it optimal for metrology-grade applications where absolute voltage fidelity outweighs programmability or marginal TC improvement.
Availability
LM4040AEM3-4.1+T is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, industrial PLC analog inputs, and test & measurement equipment requiring stable component supply across extended temperature ranges.
Supply support for LM4040AEM3-4.1+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 industrial, automotive, and medical applications, with emphasis on low-power, high-accuracy performance.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, high-reliability systems needing stable reference voltages without external capacitors or complex bias networks.
FAQ
What is the guaranteed operating temperature range for LM4040AEM3-4.1+T?
The LM4040AEM3-4.1+T is specified for continuous operation from -40°C to +125°C. This extended temperature grade (denoted by "E" in the part number) is validated per AEC-Q100 Grade 1 requirements and includes full electrical characterization across this range, including initial accuracy, tempco, and dynamic impedance.
Can LM4040AEM3-4.1+T be used without an output capacitor?
Yes, LM4040AEM3-4.1+T does not require an external output capacitor for stability and remains stable with any capacitive load - from 0pF to ≥10µF. This is confirmed in the datasheet's Applications Information section and validated in typical operating characteristics plots showing impedance vs. frequency with and without CL.
What is the minimum shunt current required for regulation at 125°C?
At TA = +125°C, the LM4040AEM3-4.1+T requires a minimum shunt current of 73μA to maintain regulation. This value is derived from the Electrical Characteristics table for the 4.096V version under "Minimum Operating Current" (IRMIN) for LM4040A grade, tested at +25°C and guaranteed over temperature.
Is pin 3 of LM4040AEM3-4.1+T functional or should it be left unconnected?
Pin 3 of LM4040AEM3-4.1+T is labeled N.C. (No Connection) and has no internal connection. The datasheet explicitly states it must be left unconnected or tied to pin 2 (anode). Connecting it to any other net may cause unpredictable behavior or violate specification limits.
How does the wideband noise of LM4040AEM3-4.1+T impact 16-bit ADC performance?
The LM4040AEM3-4.1+T's 64μVRMS wideband noise (10Hz–10kHz) contributes approximately 0.19 LSB of RMS noise to a 16-bit ADC with 4.096V full-scale range. This is well within typical noise budgets for precision data acquisition, enabling ENOB >15.8 without additional filtering when paired with proper PCB layout and decoupling.
LM4040AEM3-4.1+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040AEM3-4.1+T FAQ
1.How can I place an order for LM4040AEM3-4.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AEM3-4.1+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 LM4040AEM3-4.1+T reliable?
The price and inventory of LM4040AEM3-4.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040AEM3-4.1+T is usually 5 days.
3.What payment methods are accepted for LM4040AEM3-4.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AEM3-4.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AEM3-4.1+T?
LM4040AEM3-4.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AEM3-4.1+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 LM4040AEM3-4.1+T?
For technical support, including LM4040AEM3-4.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AEM3-4.1+T requirements.
6.How does Aetrix verify that LM4040AEM3-4.1+T is sourced from the original manufacturer or authorized distributors?
All LM4040AEM3-4.1+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 LM4040AEM3-4.1+T meets industry standards.
7.What is the process for return or replacement of LM4040AEM3-4.1+T?
All LM4040AEM3-4.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AEM3-4.1+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 LM4040AEM3-4.1+T part is unused and in its original packaging.
Return procedure for LM4040AEM3-4.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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