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Analog Devices Inc./Maxim Integrated LM4040BEX3-4.1+T
- Part No.:
- LM4040BEX3-4.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4040BEX3-4.1+T.pdf
- Description:
- IC VREF SHUNT 4.096V SC70
- Quantity:
- Payment:
- Shipping:
Inventory:882
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Product details
Overview
LM4040BEX3-4.1+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 across 60μA–15mA shunt current and supports space-constrained battery-powered instrumentation.
For engineers reviewing the LM4040BEX3-4.1+T datasheet, LM4040BEX3-4.1+T pinout, LM4040BEX3-4.1+T application, or LM4040BEX3-4.1+T equivalent, key selection criteria include shunt reference stability under varying load currents, low-noise performance (64µVRMS), absence of required output capacitance, and AEC-Q100-qualified variants for automotive use.
Technical Context
The LM4040BEX3-4.1+T uses bandgap-based shunt regulation to maintain a precise 4.096V reverse breakdown voltage without external capacitors. Its internal architecture ensures stability with any capacitive load and exhibits low dynamic impedance (≤1.0Ω at 1mA).
It operates over a wide shunt current range (60μA to 15mA) while maintaining ≤1.5mV voltage change across 1mA–15mA and ≤0.5mV across 60μA–1mA, enabling robust performance in variable-supply systems such as portable ADC references and sensor biasing circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; tight tolerance (±8.2mV max at +25°C, ±35mV over full temperature range) enables high-resolution analog measurements. |
| Initial Accuracy | 0.2% (B-grade); ensures reference error ≤±8.2mV at room temperature for calibration-critical applications. |
| Temp Coefficient | ±100ppm/°C max; contributes ≤±6.5mV drift over −40°C to +125°C, supporting industrial-grade stability. |
| Shunt Current Range | 60μA to 15mA; allows design flexibility with high-impedance bias networks or low-dropout regulator feedback paths. |
| Wideband Noise | 64µVRMS (10Hz–10kHz); low enough for 12-bit+ SAR ADC reference without additional filtering. |
| Dynamic Impedance | ≤1.0Ω at 1mA; minimizes output voltage variation under transient load changes in precision sensing. |
| Long-Term Stability | 120ppm after 1000h; supports reliability in deployed systems requiring minimal recalibration. |
Pinout & Package
LM4040BEX3-4.1+T is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), RoHS-compliant and tape-and-reel packaged (+T suffix). Pin 3 is no-connect and must remain unconnected or tied to pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode (cathode-side terminal in shunt configuration) | Connected to system ground or low-impedance return path; forms reference node with pin 2. |
| 2 (−) | Cathode (output terminal) | Provides stable 4.096V reference voltage; sinks shunt current to maintain regulation. |
| 3 (N.C.) | No connection | Must be left floating or shorted to pin 2; no internal functionality-ensures mechanical compatibility with SC70 footprint. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 package | 1.8mm × 1.8mm footprint saves >50% board area vs. SOT23, critical for wearables and compact modules. |
| No output capacitor required | Guaranteed stability with any capacitive load eliminates BOM cost and layout constraints for decoupling. |
| Low 64µVRMS noise | Enables direct use with 12-bit ADCs without external filtering, reducing signal-chain complexity. |
| Extended temperature range | −40°C to +125°C operation supports under-hood automotive and industrial control environments. |
| AEC-Q100 qualified variants available | LM4040BEX3-4.1/V+T meets automotive reliability standards; this part shares identical electrical specs and SC70 packaging. |
Applications
| Portable Data Acquisition | Automotive Cabin Sensors |
|---|---|
Use Scenario: Battery-powered handheld multimeter measuring DC voltage with 12-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 4.096V reference for ADC full-scale calibration and ratiometric sensor readings. Use Value: 0.2% initial accuracy and 64µVRMS noise ensure <±1 LSB error across operating temperature and battery discharge cycle. | Use Scenario: Occupancy detection module using MEMS accelerometer and microcontroller in vehicle cabin. IC Role / Device Role / Timing Role: Supplies precision bias voltage for analog front-end amplifiers and ADC reference in ASIL-B compatible subsystems. Use Value: −40°C to +125°C rating and AEC-Q100-compatible variants enable reliable operation near HVAC ducts and sun-exposed panels. |
| Industrial Process Transmitters | Medical Point-of-Care Devices |
Use Scenario: 4–20mA loop-powered pressure transmitter with HART modulation. IC Role / Device Role / Timing Role: Generates accurate 4.096V reference for DAC-controlled current output stage and sensor excitation. Use Value: Low dynamic impedance (≤1.0Ω) maintains regulation during HART AC signal injection without output perturbation. | Use Scenario: Portable blood glucose meter with electrochemical sensor and low-power MCU. IC Role / Device Role / Timing Role: Supplies stable reference for analog sensor signal conditioning and ADC conversion in battery-limited operation. Use Value: 60μA minimum operating current extends battery life while maintaining 0.2% accuracy across shelf-life temperature storage. |
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; higher 200ppm/°C tempco; SOT23-3 package. | Requires external resistor network for 4.096V setting; less stable over temperature than LM4040BEX3-4.1+T. | Choose when adjustable reference or higher voltage capability is needed; avoid where fixed 4.096V and low tempco are mandatory. |
| MAX6008AEUR+T | Fixed 4.096V; 0.2% accuracy; ±50ppm/°C tempco; SC70-3; but only rated for −40°C to +85°C. | Lacks extended temperature support; not suitable for under-hood or industrial ambient conditions. | Select for commercial-grade applications where tighter tempco is valued but extended temperature range is unnecessary. |
Compared with TLVH431ACDBVR and MAX6008AEUR+T, the LM4040BEX3-4.1+T uniquely combines fixed 4.096V output, 0.2% accuracy, ±100ppm/°C tempco, and −40°C to +125°C operation in SC70-3-making it optimal for automotive and industrial shunt reference designs requiring no external components.
Availability
LM4040BEX3-4.1+T is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensors, industrial process transmitters, and medical point-of-care devices requiring stable component supply across extended temperature ranges.
Supply support for LM4040BEX3-4.1+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 high-performance analog and mixed-signal semiconductor solutions for industrial, automotive, communications, and consumer markets.
The LM4040 product line delivers micropower, precision shunt voltage references optimized for space-constrained, battery-operated, and high-reliability systems requiring stable reference voltages without external compensation.
FAQ
What is the exact output voltage tolerance of LM4040BEX3-4.1+T at +25°C?
The LM4040BEX3-4.1+T has a nominal output voltage of 4.096V with a B-grade initial accuracy of ±0.2%, corresponding to ±8.2mV at +25°C. The datasheet specifies min/max values of 4.088V and 4.104V under these conditions, confirming tight factory trimming for high-precision applications.
Does LM4040BEX3-4.1+T require an external capacitor for stability?
No, the LM4040BEX3-4.1+T does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to ADC reference inputs or op-amp feedback nodes-eliminating layout dependencies and BOM additions.
What is the minimum operating current for LM4040BEX3-4.1+T?
The LM4040BEX3-4.1+T requires a minimum shunt current of 73µA (typical) to maintain regulation, with a guaranteed maximum of 78µA across −40°C to +125°C. This low quiescent requirement supports ultra-low-power designs such as energy-harvesting sensor nodes.
Is LM4040BEX3-4.1+T suitable for automotive applications?
Yes-while the LM4040BEX3-4.1+T itself is not explicitly AEC-Q100 certified, its identical variant LM4040BEX3-4.1/V+T is AEC-Q100 qualified. Both share the same SC70-3 package, electrical specs, and −40°C to +125°C rating, making LM4040BEX3-4.1+T suitable for non-certified automotive subsystems like cabin controls and infotainment power rails.
How does the noise performance of LM4040BEX3-4.1+T compare to other shunt references?
The LM4040BEX3-4.1+T delivers 64µVRMS wideband noise (10Hz–10kHz), lower than most comparable shunt references in its class (e.g., TLVH431: ~120µVRMS). This enables direct interfacing with 12-bit ADCs without post-filtering, preserving signal integrity in precision measurement systems using LM4040BEX3-4.1+T.
LM4040BEX3-4.1+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-70, SOT-323
- 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:
- SC-70-3
LM4040BEX3-4.1+T FAQ
1.How can I place an order for LM4040BEX3-4.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BEX3-4.1+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 LM4040BEX3-4.1+T reliable?
The price and inventory of LM4040BEX3-4.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040BEX3-4.1+T is usually 5 days.
3.What payment methods are accepted for LM4040BEX3-4.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BEX3-4.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BEX3-4.1+T?
LM4040BEX3-4.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BEX3-4.1+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 LM4040BEX3-4.1+T?
For technical support, including LM4040BEX3-4.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BEX3-4.1+T requirements.
6.How does Aetrix verify that LM4040BEX3-4.1+T is sourced from the original manufacturer or authorized distributors?
All LM4040BEX3-4.1+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 LM4040BEX3-4.1+T meets industry standards.
7.What is the process for return or replacement of LM4040BEX3-4.1+T?
All LM4040BEX3-4.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BEX3-4.1+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 LM4040BEX3-4.1+T part is unused and in its original packaging.
Return procedure for LM4040BEX3-4.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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