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Analog Devices Inc./Maxim Integrated LM4040CEM3-4.1+T
- Part No.:
- LM4040CEM3-4.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CEM3-4.1+T.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,415
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Product details
Overview
LM4040CEM3-4.1+T from Maxim Integrated is a precision 4.096V two-terminal shunt voltage reference in SC70-3 package, featuring 0.5% initial accuracy, 100ppm/°C max 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 LM4040CEM3-4.1+T datasheet, LM4040CEM3-4.1+T pinout, LM4040CEM3-4.1+T application, or LM4040CEM3-4.1+T equivalent, key selection criteria include its AEC-Q100-qualified extended temperature range, no-output-capacitor stability, and SC70 footprint compatibility with space-constrained portable instrumentation designs.
Technical Context
The LM4040CEM3-4.1+T implements a laser-trimmed bandgap architecture to maintain precise 4.096V reverse breakdown across wide current (60μA–15mA) and temperature (-40°C to +125°C) ranges. Its dynamic impedance remains ≤1.0Ω at 1mA, enabling stable regulation under varying load conditions without external compensation.
Unlike series references, this shunt device operates by sinking excess current through an external series resistor-its cathode-anode configuration requires no forward-bias connection, and Pin 3 (N.C.) must remain unconnected or tied to cathode to ensure specified accuracy and thermal performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; ±20mV tolerance at +25°C ensures direct compatibility with 12-bit ADC full-scale reference points. |
| Initial Accuracy | ±0.5% (C-grade); guarantees ≤±20.5mV deviation at room temperature for calibration-critical systems. |
| Temp Coefficient | ≤100ppm/°C; limits drift to ±6.5mV over full -40°C to +125°C range, supporting automotive under-hood applications. |
| Shunt Current Range | 60μA to 15mA; enables use with high-value source resistors (>100kΩ) in ultra-low-power battery monitoring. |
| Wideband Noise | 64μVRMS (10Hz–10kHz); maintains signal integrity in precision data acquisition front-ends. |
| Package | SC70-3 (1.8mm × 1.8mm); occupies 50% less PCB area than SOT23 equivalents, critical for wearable medical sensors. |
| Operating Temp | -40°C to +125°C; qualified per AEC-Q100 Grade 1, suitable for engine control unit (ECU) auxiliary references. |
Pinout & Package
LM4040CEM3-4.1+T uses the 3-pin SC70 surface-mount package (1.8mm × 1.8mm), optimized for high-density layouts. Pin 3 is no-connect and must be left floating or tied to Pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode | Positive terminal; connects to system ground or low-impedance return path in shunt configuration. |
| 2 (–) | Cathode | Negative terminal; connects to regulated output node and series current-limiting resistor. |
| 3 (N.C.) | No Connection | Must remain unconnected or bonded to Pin 2; floating Pin 3 degrades accuracy and thermal stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area enables placement in <3mm² PCB real estate, essential for miniaturized IoT edge nodes. |
| No output capacitor required | Internally compensated for stability with any capacitive load, eliminating BOM cost and layout risk from external COUT. |
| Tolerates capacitive loads | Stable with >1μF output capacitance, allowing direct interface with switched-capacitor filters or SAR ADC sample networks. |
| AEC-Q100 qualified | Validated for automotive Grade 1 (-40°C to +125°C), supporting functional safety requirements in ADAS power management. |
| Low 64μVRMS noise | Enables ≤12-bit effective resolution in 10ksps data loggers without additional filtering stages. |
Applications
| Portable Medical Sensors | Automotive Engine Control Units |
|---|---|
Use Scenario: Battery-powered ECG patch measuring microvolt-level cardiac signals. IC Role / Device Role / Timing Role: Provides stable 4.096V reference for 12-bit analog front-end ADC, rejecting supply ripple during wireless transmission bursts. Use Value: 0.5% initial accuracy and 100ppm/°C TC ensure <±1 LSB error across body-temperature variations (32°C–42°C). | Use Scenario: Cylinder pressure sensing in gasoline direct injection engines. IC Role / Device Role / Timing Role: Supplies precision reference to piezoresistive sensor signal conditioner operating near exhaust manifolds. Use Value: AEC-Q100 qualification and -40°C to +125°C operation guarantee reliability under extreme thermal cycling. |
| Industrial Process Transmitters | Energy Metering Modules |
Use Scenario: 4–20mA loop-powered temperature transmitter in chemical plants. IC Role / Device Role / Timing Role: Sets reference voltage for DAC-driven current output stage, compensating for loop supply variations. Use Value: 60μA minimum operating current allows operation down to 3.3V loop supply while maintaining 4.096V accuracy. | Use Scenario: Polyphase electricity meter with metrology-grade ADCs. IC Role / Device Role / Timing Role: Supplies calibrated reference to 24-bit sigma-delta ADC measuring voltage/current waveforms. Use Value: 64μVRMS noise floor supports >105dB SNR, meeting IEC 62053-22 Class 0.2 accuracy requirements. |
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; 100ppm/°C TC; -40°C to +125°C | Requires two external resistors for 4.096V setting; higher 200Ω dynamic impedance reduces load regulation. | Select when adjustable output or higher voltage capability (up to 18V) is needed; verify resistor tolerance impact on final accuracy. |
| MAX6008AEUR+T | Fixed 4.096V; 0.2% initial accuracy; SC70-3; 50ppm/°C TC; -40°C to +125°C; 50μA–10mA range | Higher accuracy and lower TC but narrower current range; not AEC-Q100 qualified. | Prefer for non-automotive industrial applications requiring tighter TC and accuracy; confirm supply headroom for 50μA min current. |
Compared with TLVH431ACDBVR and MAX6008AEUR+T, the LM4040CEM3-4.1+T offers AEC-Q100 qualification and wider shunt current range (60μA–15mA) at the cost of slightly relaxed initial accuracy-making it optimal for automotive and high-reliability embedded systems where robustness outweighs marginal accuracy gains.
Availability
LM4040CEM3-4.1+T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical sensors, industrial process transmitters, and energy metering modules requiring stable component supply across extended temperature ranges.
Supply support for LM4040CEM3-4.1+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 designs precision analog and mixed-signal ICs for industrial, automotive, and communications applications, emphasizing high accuracy, small size, and rugged operation.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, high-stability applications including sensor signal conditioning, portable instrumentation, and automotive subsystems.
FAQ
What is the exact reverse breakdown voltage specification for LM4040CEM3-4.1+T at +25°C?
The LM4040CEM3-4.1+T has a nominal reverse breakdown voltage of 4.096V at +25°C, with a C-grade tolerance of ±20mV (min 4.076V, max 4.116V). This value is laser-trimmed and guaranteed across the full -40°C to +125°C operating range per the datasheet's Electrical Characteristics table for the 4.096V variant.
Can LM4040CEM3-4.1+T operate without an external output capacitor?
Yes, LM4040CEM3-4.1+T does not require an external output capacitor for stability and remains stable with any capacitive load-including >1μF-due to its internal compensation. This eliminates BOM cost and layout sensitivity, unlike many series references that mandate specific COUT values.
Is LM4040CEM3-4.1+T qualified for automotive applications?
Yes, LM4040CEM3-4.1+T is AEC-Q100 qualified (Grade 1) and rated for continuous operation from -40°C to +125°C. Its SC70-3 package, 0.5% initial accuracy, and 100ppm/°C temperature coefficient meet requirements for non-safety-critical automotive subsystems such as cabin climate control sensors and body electronics.
What is the function of Pin 3 on LM4040CEM3-4.1+T, and how must it be handled?
Pin 3 on LM4040CEM3-4.1+T is designated N.C. (No Connection) and must either remain unconnected or be tied directly to Pin 2 (cathode). Leaving Pin 3 floating violates the datasheet requirement and degrades both initial accuracy and long-term stability due to parasitic coupling effects in the SC70 die layout.
How does the shunt current range of LM4040CEM3-4.1+T affect external resistor selection?
The LM4040CEM3-4.1+T requires 60μA minimum shunt current for regulation. To set RS, use: RS < [VS(MIN) − 4.096V] / [60μA + ILOAD(MAX)] and RS > [VS(MAX) − 4.096V] / [20mA + ILOAD(MIN)]. Exceeding 20mA risks permanent damage, so design must enforce this absolute limit regardless of load transients.
LM4040CEM3-4.1+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:
- ±0.5%
- 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
LM4040CEM3-4.1+T FAQ
1.How can I place an order for LM4040CEM3-4.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CEM3-4.1+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 LM4040CEM3-4.1+T reliable?
The price and inventory of LM4040CEM3-4.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CEM3-4.1+T is usually 5 days.
3.What payment methods are accepted for LM4040CEM3-4.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CEM3-4.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CEM3-4.1+T?
LM4040CEM3-4.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CEM3-4.1+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 LM4040CEM3-4.1+T?
For technical support, including LM4040CEM3-4.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CEM3-4.1+T requirements.
6.How does Aetrix verify that LM4040CEM3-4.1+T is sourced from the original manufacturer or authorized distributors?
All LM4040CEM3-4.1+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 LM4040CEM3-4.1+T meets industry standards.
7.What is the process for return or replacement of LM4040CEM3-4.1+T?
All LM4040CEM3-4.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CEM3-4.1+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 LM4040CEM3-4.1+T part is unused and in its original packaging.
Return procedure for LM4040CEM3-4.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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