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Analog Devices Inc./Maxim Integrated LM4040BEM3-3.0+T
- Part No.:
- LM4040BEM3-3.0+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040BEM3-3.0+T.pdf
- Description:
- IC VREF SHUNT 3V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,907
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Product details
Overview
LM4040BEM3-3.0+T from Maxim Integrated is a precision 3.000V 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 0.8Ω dynamic impedance, ideal for high-accuracy analog sensing and power-supply monitoring in space-constrained industrial and automotive systems.
For engineers reviewing the LM4040BEM3-3.0+T datasheet, LM4040BEM3-3.0+T pinout, LM4040BEM3-3.0+T application, or LM4040BEM3-3.0+T equivalent, key selection criteria include its AEC-Q100-qualified extended temperature range, no-output-capacitor stability, ultra-low 45µVRMS wideband noise (10Hz–10kHz), and compatibility with capacitive loads in battery-powered instrumentation.
Technical Context
The LM4040BEM3-3.0+T uses bandgap-based shunt regulation to maintain a precise 3.000V reverse breakdown voltage across its cathode-anode terminals. Its laser-trimmed internal resistor network ensures tight initial tolerance, while thermal design guarantees ≤±100ppm/°C drift over –40°C to +125°C.
It operates without external stabilization capacitance and tolerates arbitrary output capacitance, simplifying layout in compact DC-DC feedback loops and ADC reference circuits. The device sinks reverse current only-forward conduction is limited to 10mA and not intended for regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V nominal at +25°C; ±6.0mV (0.2%) initial tolerance ensures reference accuracy within 3.000V ±0.006V at room temperature. |
| Tempco | ±100ppm/°C max; contributes ≤±0.030V error over full –40°C to +125°C range, critical for high-stability sensor front-ends. |
| Shunt Current Range | 60μA to 15mA; supports low-power microcontroller biasing and high-current regulator feedback without external active components. |
| Dynamic Impedance | 0.8Ω max at 1mA; maintains <1mV output shift under 1mA load transients, enabling clean reference for 12-bit+ ADCs. |
| Wideband Noise | 45µVRMS (10Hz–10kHz); minimizes noise-induced quantization error in precision measurement systems. |
| Operating Temp Range | –40°C to +125°C; qualified for under-hood automotive and industrial control environments without derating. |
| Package | SC70-3 (1.8mm × 1.8mm); 50% smaller than SOT23, enabling placement in dense PCB layouts near analog ICs. |
Pinout & Package
LM4040BEM3-3.0+T is housed in a RoHS-compliant, lead-free SC70-3 surface-mount package (outline 21-0075) with 1.8mm × 1.8mm footprint and 0.95mm height. Pin 3 is unconnected (N.C.) and must be left floating or tied to pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode | Reverse-bias terminal; connects to regulated supply rail or feedback node where 3.000V reference is sourced. |
| 2 (–) | Anode | Reference ground return; forms the shunt current path back to system ground or negative rail. |
| 3 (N.C.) | No Connection | Internally unconnected; must remain unattached or shorted to pin 2 to avoid parasitic coupling or ESD risk. |
Key Features
| Feature | Design Value |
|---|---|
| 0.2% Initial Accuracy | Enables single-point calibration in factory programming, reducing test time and eliminating trim potentiometers in production. |
| No Output Capacitor Required | Eliminates BOM cost and board area for stabilization caps, simplifies layout for portable medical and IoT devices. |
| Tolerates Capacitive Loads | Stable with any output capacitance-including ceramic decoupling caps on adjacent LDOs-preventing oscillation in mixed-signal systems. |
| AEC-Q100 Qualified | Validated for automotive applications including engine control modules and ADAS power domains requiring extended temperature reliability. |
| Low 45µVRMS Noise | Supports 16-bit SAR ADCs without external filtering, preserving signal integrity in high-resolution data acquisition. |
Applications
| Portable Battery-Powered Equipment | Notebook Computers |
|---|---|
Use Scenario: Reference for fuel-gauge ICs and battery protection circuits in handheld meters and wearables. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 3.000V threshold for cell voltage monitoring and charge-state calculation. Use Value: Enables accurate state-of-charge estimation over full temperature range with no external capacitor or trimming. | Use Scenario: Precision reference for CPU core voltage DACs and VRM feedback in ultrabooks. IC Role / Device Role / Timing Role: Stable 3.000V reference for programmable voltage regulators controlling SoC I/O and memory rails. Use Value: Maintains ±0.2% output accuracy despite rapid load transients and ambient temperature swings during burst-mode operation. |
| Industrial Process Controls | Automotive |
Use Scenario: Reference for 4–20mA transmitter loop-powered sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Two-terminal shunt reference generating precise excitation voltage for RTD and strain gauge bridges. Use Value: Delivers stable 3.000V with <0.8Ω dynamic impedance, minimizing gain error caused by loop current variations. | Use Scenario: Reference for CAN transceiver biasing and microcontroller ADCs in body control modules. IC Role / Device Role / Timing Role: AEC-Q100-qualified 3.000V shunt reference supplying stable voltage to safety-critical sensor interfaces. Use Value: Guarantees operation up to +125°C junction temperature with no performance degradation or need for thermal derating. |
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 tempco; SOT23-3 package. | Requires external resistors to set 3.000V; higher minimum cathode current (80μA); not AEC-Q100 qualified. | Select when adjustable output or higher voltage capability is needed; avoid if AEC-Q100 compliance or fixed 3.000V accuracy is mandatory. |
| MAX6003EUR+T | Fixed 3.000V; 0.2% accuracy; ±50ppm/°C tempco; SC70-3; but rated only to +85°C. | Lacks extended temperature qualification; lower long-term stability (200ppm vs. 120ppm @1000h). | Use in commercial-grade applications where cost is prioritized over automotive/industrial temperature range. |
Compared with TLVH431ACDBVR and MAX6003EUR+T, LM4040BEM3-3.0+T uniquely combines AEC-Q100 qualification, fixed 3.000V output with 0.2% accuracy, and full –40°C to +125°C operation in the smallest SC70-3 footprint-making it optimal for space- and reliability-critical automotive and industrial designs.
Availability
LM4040BEM3-3.0+T is available at Aetrix Electronics and suitable for portable battery-powered equipment, notebook computers, industrial process controls, and automotive electronics requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4040BEM3-3.0+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, now part of Analog Devices, designs high-performance analog and mixed-signal semiconductors for industrial, automotive, communications, and computing markets.
The LM4040 product line delivers micropower, precision shunt voltage references optimized for space-constrained, high-reliability applications demanding stable reference voltages across extreme temperatures and varying load conditions.
FAQ
What is the exact reverse breakdown voltage tolerance of LM4040BEM3-3.0+T at +25°C?
The LM4040BEM3-3.0+T has a nominal reverse breakdown voltage of 3.000V at +25°C with a guaranteed tolerance of ±6.0mV (0.2%). This means the actual measured voltage falls between 2.994V and 3.006V under standard test conditions, as confirmed in the Electrical Characteristics table for the 3.000V grade B variant.
Does LM4040BEM3-3.0+T require an external output capacitor for stability?
No, LM4040BEM3-3.0+T does not require an external output capacitor. Its internal architecture ensures stability with any capacitive load, including zero capacitance. This eliminates BOM cost and layout complexity, making LM4040BEM3-3.0+T ideal for compact, low-noise reference designs where board space is constrained.
What is the maximum operating temperature range for LM4040BEM3-3.0+T?
The LM4040BEM3-3.0+T is rated for continuous operation from –40°C to +125°C. This extended temperature range is explicitly defined in the Ordering Information table for the "E" grade suffix and is validated per AEC-Q100 requirements, supporting use in under-hood automotive and harsh industrial environments.
How does the dynamic impedance of LM4040BEM3-3.0+T affect its performance in ADC reference applications?
The LM4040BEM3-3.0+T has a maximum dynamic impedance of 0.8Ω at 1mA, meaning a 1mA transient load change causes less than 0.8mV output deviation. This low impedance preserves reference accuracy during fast ADC sampling cycles, preventing code errors in 12-bit and higher-resolution converters without requiring additional buffering.
Is LM4040BEM3-3.0+T AEC-Q100 qualified, and what does that mean for automotive use?
Yes, LM4040BEM3-3.0+T is AEC-Q100 qualified, as stated in the Benefits and Features section. This qualification confirms rigorous testing for temperature cycling, humidity, vibration, and electrical stress-ensuring reliability in automotive applications such as body control modules, infotainment power supplies, and sensor interfaces operating across –40°C to +125°C.
LM4040BEM3-3.0+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 45µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 67 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040BEM3-3.0+T FAQ
1.How can I place an order for LM4040BEM3-3.0+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BEM3-3.0+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 LM4040BEM3-3.0+T reliable?
The price and inventory of LM4040BEM3-3.0+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040BEM3-3.0+T is usually 5 days.
3.What payment methods are accepted for LM4040BEM3-3.0+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BEM3-3.0+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BEM3-3.0+T?
LM4040BEM3-3.0+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BEM3-3.0+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 LM4040BEM3-3.0+T?
For technical support, including LM4040BEM3-3.0+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BEM3-3.0+T requirements.
6.How does Aetrix verify that LM4040BEM3-3.0+T is sourced from the original manufacturer or authorized distributors?
All LM4040BEM3-3.0+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 LM4040BEM3-3.0+T meets industry standards.
7.What is the process for return or replacement of LM4040BEM3-3.0+T?
All LM4040BEM3-3.0+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BEM3-3.0+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 LM4040BEM3-3.0+T part is unused and in its original packaging.
Return procedure for LM4040BEM3-3.0+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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