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Analog Devices Inc./Maxim Integrated LM4050BEX3-3.3+T
- Part No.:
- LM4050BEX3-3.3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050BEX3-3.3+T.pdf
- Description:
- IC VREF SHUNT 0.2% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,074
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Product details
Overview
LM4050BEX3-3.3+T from Analog Devices is a precision 3.3V two-terminal shunt voltage reference in SC70-3 package, featuring 0.2% initial accuracy, ±50ppm/°C max temperature coefficient over –40°C to +125°C, and 60µA–15mA operating current range. It delivers stable reverse breakdown voltage for ADC/DAC biasing, sensor excitation, and portable power monitoring circuits.
For engineers reviewing the LM4050BEX3-3.3+T datasheet, LM4050BEX3-3.3+T pinout, LM4050BEX3-3.3+T application, or LM4050BEX3-3.3+T equivalent, key selection criteria include guaranteed 0.2% tolerance at +25°C, ultra-low 50µVRMS wideband noise (10Hz–10kHz), no external capacitor requirement, and AEC-Q100-qualified variants for automotive use.
Technical Context
The LM4050BEX3-3.3+T implements a laser-trimmed bandgap core with integrated shunt regulation, maintaining 3.300V ±6.0mV (0.2% grade) across –40°C to +125°C without external compensation. Its dynamic impedance is ≤0.8Ω at 1mA, enabling stable output under load transients up to 2.5mA step changes.
Designed as a two-terminal device, it operates in reverse-bias mode with cathode (Pin 2) and anode (Pin 1); Pin 3 is NC and must be left unconnected or tied to Pin 2. It tolerates capacitive loads of any value and requires no output capacitor for stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.300V ±6.0mV at +25°C - ensures precise 12-bit ADC reference accuracy without calibration. |
| Initial Accuracy | 0.2% (B grade) - guarantees maximum 6.6mV absolute error at room temperature for high-fidelity signal chains. |
| Tempco | ±50ppm/°C max - limits drift to ±6.6mV over full –40°C to +125°C range, critical for industrial sensors. |
| Operating Current | 60µA to 15mA - supports micropower battery operation and high-current DAC reference simultaneously. |
| Wideband Noise | 50µVRMS (10Hz–10kHz) - enables low-noise precision measurement in 16-bit data acquisition systems. |
| Dynamic Impedance | ≤0.8Ω at 1mA - maintains <1mV output shift during 1mA load steps, essential for fast-settling references. |
| Long-Term Stability | 120ppm (1000h) - ensures <0.4mV drift over 6 months, supporting field-deployed instrumentation reliability. |
Pinout & Package
LM4050BEX3-3.3+T uses the 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. Thermal resistance θJA = 340.4°C/W on four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode (input terminal) | Connects to higher-potential node; sinks current when reverse-biased above 3.3V. |
| Pin 2 (–) | Cathode (output/reference terminal) | Provides stable 3.3V reference point; connects to load and feedback network. |
| Pin 3 (N.C.) | No connection | Must remain unconnected or tied to Pin 2; floating Pin 3 causes undefined behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area - enables dense PCB layouts in space-constrained portable electronics. |
| No output capacitor required | Stable with any capacitive load - eliminates BOM cost and layout risk from external stabilization caps. |
| Guaranteed 0.2% initial accuracy | ±6.0mV at +25°C - reduces or eliminates system-level trimming in production test. |
| Low 50µVRMS noise (10Hz–10kHz) | Enables <1 LSB error in 16-bit SAR ADCs - critical for high-resolution data converters. |
| AEC-Q100 qualified variants available | Supports automotive applications including body control modules and ADAS sensor interfaces. |
Applications
| Portable Medical Sensors | Industrial Data Acquisition |
|---|---|
Use Scenario: Battery-powered handheld blood glucose meter requiring stable analog front-end reference. IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation voltage for electrochemical sensor and reference for 12-bit ADC. Use Value: 0.2% initial accuracy and ±50ppm/°C tempco ensure <±0.5% total measurement error across –20°C to +55°C operating range. |
Use Scenario: 4–20mA loop-powered transmitter with local microcontroller and precision ADC. IC Role / Device Role / Timing Role: Primary reference for 16-bit sigma-delta ADC and DAC used in analog output stage. Use Value: 50µVRMS noise and ≤0.8Ω dynamic impedance prevent noise-induced quantization errors and maintain linearity under varying loop current. |
| Automotive Cabin Sensors | Test & Measurement Equipment |
Use Scenario: Occupant detection system using capacitive sensing in vehicle seats. IC Role / Device Role / Timing Role: Stable 3.3V reference for capacitance-to-digital converter (CDC) and microcontroller ADC. Use Value: AEC-Q100-compliant thermal performance (–40°C to +125°C) ensures reliable operation in under-seat environments with minimal derating. |
Use Scenario: Benchtop multimeter requiring high-accuracy DC voltage reference for autoranging. IC Role / Device Role / Timing Role: Secondary reference calibrated against primary standard; supplies reference to precision op-amp gain stages. Use Value: 120ppm long-term stability over 1000h supports 1-year calibration intervals without field recalibration. |
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) 3-pin shunt; 0.5% initial accuracy; 90ppm/°C tempco; SOT23-3 package. | Requires two external resistors for 3.3V setting; higher tempco increases drift in wide-temp industrial use. | Choose for design flexibility where adjustable output or higher voltage capability is needed; not drop-in for fixed 3.3V. |
| MAX6008AEUR+T | Fixed 3.3V shunt; 0.2% accuracy; ±20ppm/°C tempco; SC70-3; 45µVRMS noise. | Lower tempco and noise, but rated only to +85°C ambient and lacks AEC-Q100 qualification. | Prefer for commercial-grade, low-drift applications below 85°C; avoid in automotive or extended-temperature industrial designs. |
Compared with TLVH431ACDBVR and MAX6008AEUR+T, the LM4050BEX3-3.3+T uniquely combines AEC-Q100 qualification, guaranteed ±50ppm/°C tempco over –40°C to +125°C, and true fixed 3.3V output in SC70-making it optimal for automotive and harsh-environment precision references where layout space and long-term stability are critical.
Availability
LM4050BEX3-3.3+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition systems, and automotive cabin sensors requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4050BEX3-3.3+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The LM4050/LM4051 family was designed specifically for space-constrained, high-accuracy voltage reference applications demanding micropower operation, wide temperature range, and zero-output-capacitor stability-targeting portable instrumentation and automotive subsystems.
FAQ
What is the exact output voltage tolerance of LM4050BEX3-3.3+T at +25°C?
The LM4050BEX3-3.3+T has a reverse breakdown voltage of 3.300V ±6.0mV (±0.2%) at +25°C, per its B-grade specification. This tolerance is laser-trimmed and guaranteed by 100% production testing. The LM4050BEX3-3.3+T achieves this accuracy without post-assembly calibration, supporting high-yield manufacturing of precision analog systems.
Does LM4050BEX3-3.3+T require an external capacitor for stability?
No, the LM4050BEX3-3.3+T does not require an external output capacitor and remains stable with any capacitive load-from 0pF to >1µF. This eliminates capacitor-related BOM cost, placement error risk, and ESR sensitivity. The LM4050BEX3-3.3+T achieves this via internal compensation optimized for shunt-mode operation across its full 60µA–15mA current range.
What is the minimum operating current for LM4050BEX3-3.3+T?
The LM4050BEX3-3.3+T requires a minimum shunt current of 67µA to maintain regulation, as specified in its Electrical Characteristics table for the 3.3V variant. Below this threshold, output voltage deviates from nominal; designers must ensure the source resistor and load conditions sustain ≥67µA across all operating temperatures and supply variations.
Is LM4050BEX3-3.3+T qualified for automotive applications?
The LM4050BEX3-3.3+T itself is not AEC-Q100 qualified; however, Analog Devices offers AEC-Q100-qualified versions under part numbers like LM4050BEX3-3.3/V+T. These share identical electrical specs and SC70-3 packaging but include automotive-grade screening and traceability. For automotive use, specify the /V suffix variant-not the base LM4050BEX3-3.3+T.
How does LM4050BEX3-3.3+T compare to LM4050AEX3-3.3+T in accuracy and cost?
The LM4050AEX3-3.3+T offers tighter 0.1% (±3.3mV) initial accuracy versus the LM4050BEX3-3.3+T's 0.2% (±6.6mV), with identical tempco, noise, and package. The A-grade version typically carries a 15–25% premium. Use LM4050AEX3-3.3+T only when sub-3.3mV absolute error is mandatory-e.g., in metrology-grade equipment-otherwise LM4050BEX3-3.3+T delivers optimal cost/performance balance.
LM4050BEX3-3.3+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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 50µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 67 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4050BEX3-3.3+T FAQ
1.How can I place an order for LM4050BEX3-3.3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BEX3-3.3+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 LM4050BEX3-3.3+T reliable?
The price and inventory of LM4050BEX3-3.3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BEX3-3.3+T is usually 5 days.
3.What payment methods are accepted for LM4050BEX3-3.3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BEX3-3.3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BEX3-3.3+T?
LM4050BEX3-3.3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BEX3-3.3+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 LM4050BEX3-3.3+T?
For technical support, including LM4050BEX3-3.3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BEX3-3.3+T requirements.
6.How does Aetrix verify that LM4050BEX3-3.3+T is sourced from the original manufacturer or authorized distributors?
All LM4050BEX3-3.3+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 LM4050BEX3-3.3+T meets industry standards.
7.What is the process for return or replacement of LM4050BEX3-3.3+T?
All LM4050BEX3-3.3+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BEX3-3.3+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 LM4050BEX3-3.3+T part is unused and in its original packaging.
Return procedure for LM4050BEX3-3.3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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