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Analog Devices Inc./Maxim Integrated LM4050AEX3-3.3+T
- Part No.:
- LM4050AEX3-3.3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050AEX3-3.3+T.pdf
- Description:
- IC VREF SHUNT 0.1% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,740
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Product details
Overview
LM4050AEX3-3.3+T from Analog Devices is a precision 3.3V two-terminal shunt voltage reference in a 3-pin SC70 package, featuring 0.1% 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 management circuits.
For engineers reviewing the LM4050AEX3-3.3+T datasheet, LM4050AEX3-3.3+T pinout, LM4050AEX3-3.3+T application, or LM4050AEX3-3.3+T equivalent, this device supports high-accuracy analog signal chains in space-constrained, battery-powered systems where low quiescent current and capacitive-load stability are critical.
Technical Context
The LM4050AEX3-3.3+T uses a laser-trimmed bandgap core to maintain a precise 3.3000V reverse breakdown voltage with guaranteed 0.1% tolerance at +25°C and ±50ppm/°C max drift across –40°C to +125°C. Its shunt architecture requires no external capacitor and remains stable with any output capacitance.
It operates as a two-terminal device: cathode (Pin 1) and anode (Pin 2), with Pin 3 unconnected or tied to Pin 2. Dynamic impedance is ≤0.8Ω at 1mA, and wideband noise is 50µVRMS (10Hz–10kHz), enabling use in high-resolution data acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3000 V ±0.1% at +25°C - ensures <±3.3 mV absolute error in precision DAC/ADC reference rails |
| Tempco | ±50 ppm/°C max - limits voltage drift to <±5.5 mV over full –40°C to +125°C range |
| Operating Current | 60 µA to 15 mA - supports micropower sensor nodes and higher-current analog front-ends |
| Dynamic Impedance | ≤0.8 Ω at 1 mA - maintains regulation stability under fast load transients |
| Output Noise | 50 µVRMS (10 Hz–10 kHz) - avoids noise-induced errors in 16-bit+ data converters |
| Long-Term Stability | 120 ppm over 1000 hours - ensures reference integrity in sealed industrial modules |
| Package | 3-pin SC70 (1.8 mm × 1.8 mm) - enables placement in ultra-dense PCB layouts |
Pinout & Package
LM4050AEX3-3.3+T is housed in a 3-pin SC70 surface-mount package (outline 21-0075, land pattern 90-0208). Pin 3 is NC and must be left unconnected or shorted to Pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Cathode | Reverse-biased terminal - connects to regulated node; sinks shunt current to maintain 3.3V |
| Pin 2 (–) | Anode | Reference ground return - ties to system ground or low-impedance return path |
| Pin 3 (N.C.) | No Connection | Must be floating or connected to Pin 2 - no internal function; prevents parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| 0.1% Initial Accuracy | Laser-trimmed resistor network guarantees ±3.3 mV absolute output tolerance at +25°C |
| No Output Capacitor Required | Internally compensated design eliminates need for external stabilization capacitor |
| Capacitive Load Tolerance | Stable with any output capacitance - simplifies layout in noisy mixed-signal environments |
| AEC-Q100 Qualified Option | LM4050AEX3-3.3/V+T variant meets automotive reliability standards for under-hood use |
| Ultra-Small SC70 Footprint | 50% smaller than SOT23 - saves >0.8 mm² board area per device in portable designs |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Battery-powered wearable ECG sensor with 24-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Provides stable 3.3V reference for ADC voltage scaling and sensor bridge excitation. Use Value: 0.1% accuracy and 50µVRMS noise ensure <±0.5 LSB error in 24-bit conversion at 1 kSPS. |
Use Scenario: Ruggedized environmental monitor deployed in remote oil-field equipment. IC Role / Device Role / Timing Role: Supplies precision reference for RTD and thermocouple signal conditioning circuitry. Use Value: ±50ppm/°C tempco and –40°C to +125°C rating maintain <±0.01% measurement fidelity across extreme ambient swings. |
| Automotive Cabin Control Units | Wireless IoT Edge Nodes |
Use Scenario: HVAC control module requiring AEC-Q100-compliant analog sensing. IC Role / Device Role / Timing Role: Reference source for microcontroller ADC measuring cabin temperature and humidity. Use Value: LM4050AEX3-3.3/V+T variant provides automotive-grade long-term stability and thermal robustness. |
Use Scenario: LoRaWAN soil moisture sensor powered by coin-cell battery. IC Role / Device Role / Timing Role: Low-current shunt reference enabling <100nA sleep-mode leakage while retaining calibration. Use Value: 60µA minimum operating current extends battery life beyond 5 years in duty-cycled operation. |
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; 1% initial accuracy; 100ppm/°C max tempco; SOT23-3 | Requires two external resistors for 3.3V setting; less accurate and less stable over temperature | Select when adjustable output or cost sensitivity outweighs need for 0.1% precision |
| MAX6008AEUR+T | Fixed 3.3V; 0.2% initial accuracy; ±75ppm/°C tempco; SOT23-3; 100µA–20mA range | Lower accuracy grade and higher tempco limit use in extended-temperature industrial sensors | Choose for legacy SOT23 footprint compatibility where 0.2% tolerance is acceptable |
Compared with TLVH431ACDBVR and MAX6008AEUR+T, LM4050AEX3-3.3+T delivers superior initial accuracy and thermal stability in the smallest footprint-critical for next-generation portable instrumentation and automotive subsystems demanding <±0.01% reference drift.
Availability
LM4050AEX3-3.3+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, and automotive cabin control units requiring stable component supply with guaranteed long-term availability.
Supply support for LM4050AEX3-3.3+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.
The LM4050/LM4051 family was designed specifically for space-constrained, high-accuracy analog systems needing stable, low-power shunt references across –40°C to +125°C.
FAQ
What is the guaranteed initial accuracy of LM4050AEX3-3.3+T at +25°C?
The LM4050AEX3-3.3+T is guaranteed to deliver 3.3000 V ±0.1% (±3.3 mV) at +25°C, verified by 100% production testing and laser trimming. This accuracy is maintained across the full operating current range of 60 µA to 15 mA, making LM4050AEX3-3.3+T suitable for metrology-grade applications where absolute voltage tolerance is critical.
Does LM4050AEX3-3.3+T require an external output capacitor for stability?
No, LM4050AEX3-3.3+T does not require an external output capacitor. Its internal compensation ensures stability with any capacitive load, including direct connection to ADC input capacitors or long PCB traces. This eliminates capacitor-related aging, leakage, and layout constraints-key advantages over older shunt references like TL431.
What is the maximum operating temperature range for LM4050AEX3-3.3+T?
The LM4050AEX3-3.3+T is fully specified and guaranteed over –40°C to +125°C. Its ±50ppm/°C max temperature coefficient and 120 ppm long-term stability at 1000 hours make it appropriate for under-hood automotive modules, industrial process controllers, and outdoor environmental sensors where thermal resilience is mandatory.
How does the SC70 package of LM4050AEX3-3.3+T compare to SOT23 alternatives?
The SC70 package of LM4050AEX3-3.3+T measures 1.8 mm × 1.8 mm-50% smaller than standard SOT23-and reduces PCB area by >0.8 mm² per device. While electrically identical to SOT23 versions (e.g., LM4050AEM3-3.3+T), the SC70 variant enables denser routing in wearables, hearing aids, and miniaturized IoT endpoints where board real estate is constrained.
Can LM4050AEX3-3.3+T be used in automotive applications?
Yes-the LM4050AEX3-3.3/V+T variant is AEC-Q100 qualified for automotive use. While LM4050AEX3-3.3+T itself is not automotive-qualified, its identical electrical specs and SC70 packaging allow direct drop-in replacement in non-safety-critical cabin systems (e.g., infotainment sensors), provided qualification requirements are validated per program needs.
LM4050AEX3-3.3+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:
- ±0.1%
- 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
LM4050AEX3-3.3+T FAQ
1.How can I place an order for LM4050AEX3-3.3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEX3-3.3+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 LM4050AEX3-3.3+T reliable?
The price and inventory of LM4050AEX3-3.3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AEX3-3.3+T is usually 5 days.
3.What payment methods are accepted for LM4050AEX3-3.3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEX3-3.3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEX3-3.3+T?
LM4050AEX3-3.3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEX3-3.3+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 LM4050AEX3-3.3+T?
For technical support, including LM4050AEX3-3.3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEX3-3.3+T requirements.
6.How does Aetrix verify that LM4050AEX3-3.3+T is sourced from the original manufacturer or authorized distributors?
All LM4050AEX3-3.3+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 LM4050AEX3-3.3+T meets industry standards.
7.What is the process for return or replacement of LM4050AEX3-3.3+T?
All LM4050AEX3-3.3+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEX3-3.3+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 LM4050AEX3-3.3+T part is unused and in its original packaging.
Return procedure for LM4050AEX3-3.3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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