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Analog Devices Inc./Maxim Integrated LM4040BEM3-4.1+T
- Part No.:
- LM4040BEM3-4.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040BEM3-4.1+T.pdf
- Description:
- IC VREF SHUNT 4.096V SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,620
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Product details
Overview
LM4040BEM3-4.1+T from Maxim Integrated is a precision 4.096V two-terminal shunt voltage reference in SC70-3 package, featuring 0.2% 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 LM4040BEM3-4.1+T datasheet, LM4040BEM3-4.1+T pinout, LM4040BEM3-4.1+T application, or LM4040BEM3-4.1+T equivalent, key selection criteria include its AEC-Q100-qualified extended temperature range, no-output-capacitor requirement, SC70 footprint compatibility, and 3-pin shunt topology for space-constrained power rail monitoring.
Technical Context
The LM4040BEM3-4.1+T uses bandgap-based shunt regulation to maintain a precise 4.096V reverse breakdown voltage across its cathode-anode terminals. Its internal laser-trimmed resistor network ensures 0.2% initial tolerance at +25°C, while thermal design guarantees ±100ppm/°C drift over -40°C to +125°C.
It operates as a two-terminal device requiring only an external series resistor to set shunt current between 60μA and 15mA. With 0.5Ω typical dynamic impedance at 1mA and stability under any capacitive load, it eliminates need for output stabilization capacitors-unlike traditional zener diodes or series references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal reverse breakdown voltage, tightly controlled for 12-bit ADC full-scale reference alignment |
| Initial Accuracy | ±0.2% at +25°C - enables direct use in 10-bit systems without calibration |
| Temp Coefficient | ±100ppm/°C max - ensures ≤±0.52% voltage drift over full -40°C to +125°C range |
| Shunt Current Range | 60μA to 15mA - supports ultra-low-power sleep modes and high-current transient regulation |
| Wideband Noise | 64μVRMS (10Hz–10kHz) - minimizes quantization error in precision data acquisition |
| Dynamic Impedance | 0.5Ω typ at 1mA - maintains voltage stability during rapid load current changes |
| Long-Term Stability | 120ppm after 1000h - ensures reference integrity in automotive ECU lifetime applications |
Pinout & Package
The LM4040BEM3-4.1+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 unconnected (N.C.) and must remain floating or tied to pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode | Reverse-biased terminal where regulated 4.096V appears relative to pin 2; connects to supply rail via series resistor |
| 2 (–) | Anode | Reference ground node; all load currents return here; defines voltage reference point |
| 3 (N.C.) | No Connection | Internally unused; must be left unconnected or shorted to pin 2 - not a trim or enable pin |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% PCB space vs. SOT23, critical for compact automotive ECUs |
| No output capacitor required | Guaranteed stability with any capacitive load eliminates BOM cost and layout risk of external C |
| AEC-Q100 qualified | Validated for automotive applications per Grade 1 (-40°C to +125°C) stress testing |
| Low micropower operation | 60μA minimum shunt current enables battery-backed systems to operate >10 years on coin cell |
| Tolerates capacitive loads | Stable with 0–10µF output capacitance - simplifies filtering in noisy motor-control environments |
Applications
| Automotive Cabin Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Reference for MEMS pressure/temperature sensors in HVAC control units operating at 125°C ambient. IC Role / Device Role / Timing Role: Two-terminal shunt reference providing stable 4.096V bias to 12-bit SAR ADC front-end. Use Value: ±0.2% initial accuracy and ±100ppm/°C TC ensure <±0.5% total error over full automotive temperature range without calibration. | Use Scenario: Precision voltage reference in battery-powered environmental monitoring nodes deployed in remote industrial sites. IC Role / Device Role / Timing Role: Micropower shunt reference enabling 60μA minimum operating current for multi-year battery life. Use Value: No external capacitor requirement reduces component count and improves long-term reliability in unattended deployments. |
| Portable Medical Devices | Smart Energy Meters |
Use Scenario: Reference source for ECG analog front-end in handheld patient monitors requiring clinical-grade accuracy. IC Role / Device Role / Timing Role: Low-noise (64μVRMS) shunt reference stabilizing gain-setting resistors and ADC reference inputs. Use Value: 64μVRMS wideband noise directly limits effective resolution to >14.5 ENOB, meeting IEC 60601-2-27 requirements. | Use Scenario: Calibration reference in Class 0.2 electricity meters operating continuously at elevated temperatures. IC Role / Device Role / Timing Role: Long-term stable shunt reference maintaining meter accuracy over 10+ year service life. Use Value: 120ppm drift after 1000h ensures <0.012% reference degradation - well within meter's 0.2% accuracy class margin. |
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 shunt; 0.5% initial accuracy; 100ppm/°C TC; SOT23-3 | Requires two external resistors for 4.096V setting; higher minimum cathode current (80μA) | Select when adjustable output or higher voltage capability (>5V) is needed; verify layout fits SOT23 footprint |
| ADR3440ARJZ-R7 | Fixed 4.096V series reference; 0.1% accuracy; 30ppm/°C TC; SOT23-5 | Three-terminal architecture requires separate input/output pins; needs 100nF bypass capacitor | Select when ultra-low TC (<30ppm/°C) and lower noise (4.8μVRMS) are mandatory; accept larger footprint and extra capacitor |
Compared with TLVH431ACDBVR and ADR3440ARJZ-R7, the LM4040BEM3-4.1+T offers the smallest PCB area (SC70), lowest system BOM count (no resistors or capacitor), and AEC-Q100 qualification - making it optimal for space- and reliability-critical automotive and industrial shunt reference designs.
Availability
LM4040BEM3-4.1+T is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial data loggers, portable medical devices, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4040BEM3-4.1+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 communications applications, with emphasis on high reliability and performance under extreme conditions.
The LM4040 product line delivers micropower, high-accuracy shunt voltage references optimized for space-constrained systems requiring stable DC bias without external compensation components.
FAQ
What is the exact reverse breakdown voltage specification for LM4040BEM3-4.1+T?
The LM4040BEM3-4.1+T has a nominal reverse breakdown voltage of 4.096V at +25°C, with a guaranteed tolerance of ±0.2% (±8.2mV) at room temperature. Over the full -40°C to +125°C range, total voltage variation remains within ±0.85% due to its ±100ppm/°C temperature coefficient - confirmed in the Electrical Characteristics table for the 4.096V variant.
Does LM4040BEM3-4.1+T require an external output capacitor for stability?
No, the LM4040BEM3-4.1+T does not require an external output capacitor. Its internal design ensures unconditional stability with any capacitive load from 0 to 10µF, eliminating the need for external components and reducing PCB area and BOM cost - a key advantage over many series references and older shunt devices.
What is the minimum operating current for LM4040BEM3-4.1+T, and why does it matter?
The LM4040BEM3-4.1+T requires a minimum shunt current of 73μA (typical) to maintain regulation, with 60μA specified as the absolute lower limit. This low threshold enables ultra-low-power operation in battery-backed systems, allowing continuous reference functionality for over a decade on a single CR2032 coin cell - critical for maintenance-free industrial sensors.
Is LM4040BEM3-4.1+T qualified for automotive applications?
Yes, the LM4040BEM3-4.1+T is AEC-Q100 qualified for automotive applications. Its "E" grade designation indicates guaranteed operation from -40°C to +125°C, and it meets stress test requirements for temperature cycling, humidity, and mechanical shock - making it suitable for engine control units, ADAS sensors, and infotainment power rails.
How does the N.C. pin (pin 3) function in LM4040BEM3-4.1+T?
Pin 3 of the LM4040BEM3-4.1+T is a true no-connect (N.C.) terminal with no internal connection. It must either be left unconnected or tied to pin 2 (anode); it is never used for trimming, enable, or feedback. This design simplifies layout and avoids misinterpretation as a functional pin - confirmed in the Pin Description section of the datasheet.
LM4040BEM3-4.1+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:
- ±0.2%
- 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
LM4040BEM3-4.1+T FAQ
1.How can I place an order for LM4040BEM3-4.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BEM3-4.1+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 LM4040BEM3-4.1+T reliable?
The price and inventory of LM4040BEM3-4.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040BEM3-4.1+T is usually 5 days.
3.What payment methods are accepted for LM4040BEM3-4.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BEM3-4.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BEM3-4.1+T?
LM4040BEM3-4.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BEM3-4.1+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 LM4040BEM3-4.1+T?
For technical support, including LM4040BEM3-4.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BEM3-4.1+T requirements.
6.How does Aetrix verify that LM4040BEM3-4.1+T is sourced from the original manufacturer or authorized distributors?
All LM4040BEM3-4.1+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 LM4040BEM3-4.1+T meets industry standards.
7.What is the process for return or replacement of LM4040BEM3-4.1+T?
All LM4040BEM3-4.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BEM3-4.1+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 LM4040BEM3-4.1+T part is unused and in its original packaging.
Return procedure for LM4040BEM3-4.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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