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Analog Devices Inc./Maxim Integrated LM4050AEX3-3.0+T
- Part No.:
- LM4050AEX3-3.0+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050AEX3-3.0+T.pdf
- Description:
- IC VREF SHUNT 3V SC70
- Quantity:
- Payment:
- Shipping:
Inventory:2,446
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Product details
Overview
LM4050AEX3-3.0+T from Analog Devices is a precision 3.000 V, two-terminal shunt voltage reference in a 3-pin SC70 package, featuring 0.1% initial accuracy, ±50 ppm/°C max temperature coefficient over –40°C to +125°C, and 60 µA to 15 mA operating current range. It serves as a stable reference for ADC/DAC biasing, battery-monitoring circuits, and portable power management systems.
For engineers reviewing the LM4050AEX3-3.0+T datasheet, LM4050AEX3-3.0+T pinout, LM4050AEX3-3.0+T application, or LM4050AEX3-3.0+T equivalent, key selection criteria include guaranteed 3.000 V reverse breakdown voltage at 25°C (±3.0 mV), ultra-low 45 µVRMS wideband noise (10 Hz–10 kHz), and no external capacitor requirement for stability with capacitive loads.
Technical Context
The LM4050AEX3-3.0+T implements a laser-trimmed bandgap core to deliver fixed 3.000 V reverse breakdown voltage with minimal drift. Its shunt architecture sinks current across an external resistor to maintain regulation-no series pass element or control loop is used.
It operates without output capacitance and remains stable under any capacitive load, enabled by low dynamic impedance (≤0.8 Ω at 1 mA) and inherent frequency compensation. The device tolerates forward currents up to 10 mA and reverse currents up to 20 mA absolute maximum.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000 V nominal reverse breakdown voltage at +25°C, guaranteed ±3.0 mV (0.1% grade) |
| Initial Accuracy | ±0.1% over full temperature range (–40°C to +125°C), enabling high-precision sensor calibration |
| Tempco | ≤50 ppm/°C max average TC, ensuring ≤±0.6% total voltage drift across full operating range |
| Operating Current | 60 µA minimum to 15 mA maximum shunt current-supports micropower and moderate-load applications |
| Output Noise | 45 µVRMS (10 Hz–10 kHz), critical for high-resolution data acquisition front-ends |
| Dynamic Impedance | ≤0.8 Ω at 1 mA, minimizing voltage shift under load transients |
| Long-Term Stability | 120 ppm after 1000 hours, supporting reliable performance in mission-critical instrumentation |
Pinout & Package
LM4050AEX3-3.0+T is housed in a 3-pin SC70 surface-mount package (1.8 mm × 1.8 mm), 50% smaller than SOT23. Pin 3 is unconnected (N.C.) and must be left floating or tied to Pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Positive terminal (anode) | Reference output node-connects to load or feedback network; voltage referenced to Pin 2 |
| Pin 2 (–) | Negative terminal (cathode) | Ground reference node-must be connected to system ground or return path |
| Pin 3 (N.C.) | No connection | Must remain unconnected or shorted to Pin 2; no internal function or electrical tie |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70 footprint | 1.8 mm × 1.8 mm package enables high-density PCB layouts in space-constrained portable designs |
| No output capacitor required | Eliminates BOM cost and layout area while guaranteeing stability with any capacitive load |
| Low 45 µVRMS noise | Enables ≥16-bit effective resolution in precision ADC references without additional filtering |
| Wide 60 µA–15 mA operating range | Supports both micropower battery monitoring and higher-current analog signal conditioning |
| AEC-Q100 qualified variants available | Specific /V suffix versions meet automotive reliability standards-LM4050AEX3-3.0/V+T is qualified |
Applications
| Portable Battery Monitoring | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Real-time Li-ion cell voltage measurement in handheld medical devices. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.000 V reference for 16-bit SAR ADC input scaling. Use Value: 0.1% initial accuracy and 50 ppm/°C tempco ensure <±0.6% total error across –20°C to +70°C ambient, meeting IEC 62304 Class C requirements. |
Use Scenario: Precision bridge sensor excitation and offset correction in factory-floor pressure transmitters. IC Role / Device Role / Timing Role: Stable 3.000 V reference for instrumentation amplifier gain-setting and ADC reference rails. Use Value: 45 µVRMS noise and ≤0.8 Ω dynamic impedance minimize code flicker and improve repeatability in 24-bit delta-sigma measurements. |
| Automotive Cabin Control Unit | Energy Meter Reference Subsystem |
|
Use Scenario: Voltage reference for microcontroller ADC in HVAC control module operating at –40°C to +125°C. IC Role / Device Role / Timing Role: AEC-Q100 qualified shunt reference (via /V variant) delivering 3.000 V with guaranteed performance across full automotive temperature range. Use Value: Guaranteed 0.1% accuracy and ≤50 ppm/°C tempco eliminate need for per-unit calibration, reducing manufacturing test time and cost. |
Use Scenario: Reference source for polyphase energy meter ICs requiring metrology-grade voltage stability. IC Role / Device Role / Timing Role: Primary 3.000 V reference for anti-tampering detection circuitry and high-accuracy current channel calibration. Use Value: 120 ppm long-term stability (1000 h) and no-output-capacitor operation simplify design validation for IEC 62053-21 compliance. |
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 1.24–18 V output; 0.5% initial accuracy; 90 ppm/°C tempco; SOT23-3 | Requires external resistors for 3.0 V setting; higher tempco reduces accuracy at temperature extremes | Select when adjustable output or higher voltage capability is needed; not drop-in for fixed 3.0 V use |
| MAX6012AEUR+T | Fixed 3.0 V; 0.1% accuracy; 20 ppm/°C tempco; SOT23-3; 50 µA–10 mA range | Lower tempco improves stability but narrower current range limits high-load applications | Prefer for ultra-stable references where load current stays below 10 mA and board space allows SOT23 |
Compared with TLVH431ACDBVR and MAX6012AEUR+T, LM4050AEX3-3.0+T offers superior current range (60 µA–15 mA) and SC70 size advantage, while maintaining 0.1% accuracy and automotive-grade tempco-making it optimal for compact, wide-operating-range industrial and portable systems.
Availability
LM4050AEX3-3.0+T is available at Aetrix Electronics and suitable for portable battery monitoring, industrial sensor signal conditioning, and automotive cabin control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050AEX3-3.0+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
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 needs in portable, battery-powered, and automotive systems-emphasizing micropower operation, ultra-small packaging, and guaranteed parametric performance across –40°C to +125°C.
FAQ
What is the exact reverse breakdown voltage tolerance of LM4050AEX3-3.0+T at +25°C?
The LM4050AEX3-3.0+T guarantees a reverse breakdown voltage of 3.000 V at +25°C with a tolerance of ±3.0 mV (±0.1%) and ±18 mV (±0.6%) over the full –40°C to +125°C range. This is confirmed in the Electrical Characteristics table for the 3.000 V grade under LM4050A conditions, where min/max values are 2.9970 V and 3.0030 V at 25°C.
Does LM4050AEX3-3.0+T require an external output capacitor for stability?
No, LM4050AEX3-3.0+T does not require an external output capacitor and remains stable with any capacitive load. This is explicitly stated in the Features section and validated in the Applications Information section, which confirms no output capacitors are needed due to its internally compensated shunt architecture and low dynamic impedance.
What is the minimum operating current for LM4050AEX3-3.0+T, and why is it critical?
The minimum operating current for LM4050AEX3-3.0+T is 60 µA, as specified in the Electrical Characteristics table. Maintaining ≥60 µA shunt current ensures the device remains in regulation and delivers its rated accuracy and tempco performance; falling below this threshold causes output voltage collapse and loss of specification compliance.
Can LM4050AEX3-3.0+T be used in automotive applications?
Yes-while LM4050AEX3-3.0+T itself is not AEC-Q100 qualified, the pin-compatible LM4050AEX3-3.0/V+T variant is explicitly AEC-Q100 qualified and shares identical electrical specs and SC70 packaging. For automotive use, LM4050AEX3-3.0/V+T is the designated qualified version per the Ordering Information table.
What is the thermal resistance (θJA) of the SC70 package used in LM4050AEX3-3.0+T?
The junction-to-ambient thermal resistance (θJA) for the 3-pin SC70 package used in LM4050AEX3-3.0+T is 340.40°C/W on a four-layer board, as documented in the Package Information section. This value is essential for calculating junction temperature rise under load and verifying operation within the +150°C absolute maximum rating.
LM4050AEX3-3.0+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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°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:
- SC-70-3
LM4050AEX3-3.0+T FAQ
1.How can I place an order for LM4050AEX3-3.0+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEX3-3.0+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 LM4050AEX3-3.0+T reliable?
The price and inventory of LM4050AEX3-3.0+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AEX3-3.0+T is usually 5 days.
3.What payment methods are accepted for LM4050AEX3-3.0+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEX3-3.0+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEX3-3.0+T?
LM4050AEX3-3.0+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEX3-3.0+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 LM4050AEX3-3.0+T?
For technical support, including LM4050AEX3-3.0+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEX3-3.0+T requirements.
6.How does Aetrix verify that LM4050AEX3-3.0+T is sourced from the original manufacturer or authorized distributors?
All LM4050AEX3-3.0+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 LM4050AEX3-3.0+T meets industry standards.
7.What is the process for return or replacement of LM4050AEX3-3.0+T?
All LM4050AEX3-3.0+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEX3-3.0+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 LM4050AEX3-3.0+T part is unused and in its original packaging.
Return procedure for LM4050AEX3-3.0+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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