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Analog Devices Inc./Maxim Integrated LM4050AEX3-3.3/V+T
- Part No.:
- LM4050AEX3-3.3/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050AEX3-3.3/V+T.pdf
- Description:
- IC VREF SHUNT 0.1% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,133
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Product details
Overview
LM4050AEX3-3.3/V+T from Analog Devices is a precision 3.3V shunt voltage reference in a 3-pin SC70 package, delivering 0.1% initial accuracy, ±50ppm/°C max temperature coefficient over –40°C to +125°C, and stable regulation across 60µA–15mA shunt current - used for ADC/DAC biasing, sensor excitation, and power supply monitoring in automotive and portable systems.
For engineers reviewing the LM4050AEX3-3.3/V+T datasheet, LM4050AEX3-3.3/V+T pinout, LM4050AEX3-3.3/V+T application, or LM4050AEX3-3.3/V+T equivalent, key selection criteria include guaranteed AEC-Q100 qualification, no-output-capacitor operation, ultra-low 50µVRMS noise (10Hz–10kHz), and compatibility with capacitive loads without instability.
Technical Context
The LM4050AEX3-3.3/V+T implements a laser-trimmed bandgap shunt architecture, operating as a two-terminal device where reverse breakdown voltage is maintained across its anode and cathode terminals under 60µA–15mA sink current. It requires no external stabilization capacitor and remains stable with any output capacitance.
Its design supports high-temperature operation up to +125°C ambient, with thermal resistance θJA = 340.4°C/W on a four-layer board. The /V suffix confirms AEC-Q100 qualification for automotive applications, and the SC70 package (1.8mm × 1.8mm) enables space-constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3000 V nominal at +25°C, with ±3.0 mV (±0.09%) tolerance over full temp range - ensures precise reference for 12-bit+ data converters. |
| Initial Accuracy | 0.1% (Grade A) - achieved via laser trimming, enabling single-point calibration elimination in production test. |
| Tempco | ±50 ppm/°C max - guarantees ≤ ±5.0 mV drift over –40°C to +125°C, critical for industrial sensor front-ends. |
| Shunt Current Range | 60 µA to 15 mA - supports micropower battery operation and robust load regulation without external series resistor redesign. |
| Output Noise | 50 µVRMS (10 Hz–10 kHz) - low enough to avoid degrading SNR in precision 16-bit SAR ADCs. |
| Dynamic Impedance | 0.3 Ω to 0.8 Ω at 1 mA - minimizes load-induced voltage shift during fast current transients. |
| Long-Term Stability | 120 ppm after 1000 hours - ensures reference integrity in sealed automotive modules with >10-year service life. |
Pinout & Package
LM4050AEX3-3.3/V+T uses a 3-pin SC70 surface-mount package (1.8 mm × 1.8 mm, 0.95 mm height), optimized for high-density PCBs and reflow-compatible assembly. Pin 3 is unconnected (N.C.) and must be left floating or tied to pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode (positive terminal) | Connected to system ground or low-impedance return path; forms cathode-to-anode reverse bias path. |
| 2 (–) | Cathode (negative terminal) | Reference output node; sinks shunt current and supplies stable 3.3V to load circuits. |
| 3 (N.C.) | No connection | Must remain unconnected or shorted to pin 2; no internal function - avoids parasitic coupling in RF-sensitive designs. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Validated for automotive applications per Grade 1 (–40°C to +125°C), including HTOL, TC, and ESD testing - eliminates qualification effort for Tier 1 suppliers. |
| No output capacitor required | Internally compensated for stability with any capacitive load - removes BOM cost, layout area, and aging-related drift from external C. |
| Ultra-small SC70 footprint | 50% smaller than SOT23 equivalents - enables placement adjacent to precision analog ICs without trace inductance penalties. |
| Wide shunt current range | Operates down to 60 µA quiescent current - extends battery life in always-on IoT sensors while maintaining 3.3V accuracy. |
| Tolerates capacitive loads | Stable with ≥0 pF output capacitance - supports direct connection to ADC reference inputs, op-amp feedback nodes, and LDO enable pins. |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
Use Scenario: Reference for MEMS pressure and humidity sensors in HVAC control modules. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.3V excitation and ADC reference voltage. Use Value: ±50 ppm/°C tempco ensures <±0.5% full-scale error over vehicle cabin temperature swing (–40°C to +85°C). | Use Scenario: Powering and referencing analog front-end of handheld ECG and SpO₂ devices. IC Role / Device Role / Timing Role: Precision voltage source for low-noise instrumentation amplifiers and 16-bit SAR ADCs. Use Value: 50 µVRMS noise prevents degradation of clinical-grade signal fidelity in sub-µV biopotential measurements. |
| Industrial PLC I/O Modules | Smart Energy Meters |
Use Scenario: Calibration reference for 4–20 mA transmitter circuitry in distributed I/O racks. IC Role / Device Role / Timing Role: Two-terminal shunt reference establishing accurate loop current setpoint. Use Value: 0.1% initial accuracy eliminates field recalibration; 120 ppm long-term stability supports 15-year metrology compliance. | Use Scenario: Reference for polyphase energy measurement ICs (e.g., ADE7953) in Class 0.5 meters. IC Role / Device Role / Timing Role: Stable 3.3V reference for metrology ADCs and isolated communication interfaces. Use Value: Guaranteed AEC-Q100 qualification ensures reliability in utility-grade deployments with 20+ year lifetimes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C33IDBZR | 0.5% initial accuracy, ±100 ppm/°C tempco, SOT23-3 package, non-AEC-Q100 | Suitable for commercial-grade industrial controls but not automotive or long-life metering | Select when cost sensitivity outweighs accuracy/tempco requirements and AEC-Q100 is unnecessary. |
| REF3033AIDBZR | Series topology (not shunt), 0.2% accuracy, 50 ppm/°C, 3.3V output, SOT23-3 | Requires minimum load current; incompatible with high-side sensing or floating reference topologies | Choose only if system architecture mandates series reference and ground-referenced output is acceptable. |
Compared with TL4050C33IDBZR and REF3033AIDBZR, LM4050AEX3-3.3/V+T uniquely combines AEC-Q100 qualification, 0.1% accuracy, and true two-terminal shunt operation - enabling drop-in replacement in automotive sensor modules and eliminating need for external current-sense resistors or load-current compensation.
Availability
LM4050AEX3-3.3/V+T is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, industrial PLC I/O modules, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4050AEX3-3.3/V+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, Inc. 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-reliability applications demanding precision voltage references with zero external components - targeting automotive sensor systems, portable instrumentation, and industrial process controllers.
FAQ
What is the operating temperature range for LM4050AEX3-3.3/V+T?
The LM4050AEX3-3.3/V+T is specified from –40°C to +125°C and fully guaranteed across this range. Its AEC-Q100 qualification confirms compliance with automotive Grade 1 requirements, including thermal cycling, high-temperature operating life, and bias-HAST testing - making it suitable for under-hood and cabin applications where ambient extremes occur.
Does LM4050AEX3-3.3/V+T require an external capacitor for stability?
No, LM4050AEX3-3.3/V+T does not require an external capacitor for stability. Its internal design ensures unconditional stability with any output capacitance, including zero capacitance. This eliminates BOM cost, PCB area, and potential drift from capacitor aging - a key advantage over many competing shunt references that mandate minimum 1nF to 10nF bypass caps.
What is the meaning of the "/V" suffix in LM4050AEX3-3.3/V+T?
The "/V" suffix in LM4050AEX3-3.3/V+T indicates AEC-Q100 qualification per Grade 1 (–40°C to +125°C). This includes rigorous stress testing for automotive reliability: HTOL, temperature cycling, ESD (HBM ≥2kV), and mechanical shock. The "V" is part of the official ordering code defined by Analog Devices and confirms automotive-grade traceability and lot-level qualification data.
How does LM4050AEX3-3.3/V+T differ from the LM4050AEM3-3.3+T variant?
LM4050AEX3-3.3/V+T uses the 3-pin SC70 package (1.8mm × 1.8mm) and carries AEC-Q100 qualification (/V), whereas LM4050AEM3-3.3+T uses the larger SOT23-3 package (2.9mm × 1.6mm) and lacks the /V automotive qualification. Both share identical electrical specs (0.1% accuracy, 3.3V, ±50ppm/°C), but only LM4050AEX3-3.3/V+T meets automotive reliability standards and fits ultra-dense layouts.
What is the minimum shunt current needed for LM4050AEX3-3.3/V+T to regulate properly?
The LM4050AEX3-3.3/V+T requires a minimum shunt current of 60 µA to maintain regulation within specifications. Below this threshold, output voltage may deviate beyond the guaranteed tolerance band. Designers must ensure the series resistor (RS) and supply voltage combination sustains ≥60 µA through LM4050AEX3-3.3/V+T under worst-case conditions (min VS, max load current).
LM4050AEX3-3.3/V+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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4050AEX3-3.3/V+T FAQ
1.How can I place an order for LM4050AEX3-3.3/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEX3-3.3/V+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/V+T reliable?
The price and inventory of LM4050AEX3-3.3/V+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/V+T is usually 5 days.
3.What payment methods are accepted for LM4050AEX3-3.3/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEX3-3.3/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEX3-3.3/V+T?
LM4050AEX3-3.3/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEX3-3.3/V+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/V+T?
For technical support, including LM4050AEX3-3.3/V+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/V+T requirements.
6.How does Aetrix verify that LM4050AEX3-3.3/V+T is sourced from the original manufacturer or authorized distributors?
All LM4050AEX3-3.3/V+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/V+T meets industry standards.
7.What is the process for return or replacement of LM4050AEX3-3.3/V+T?
All LM4050AEX3-3.3/V+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEX3-3.3/V+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/V+T part is unused and in its original packaging.
Return procedure for LM4050AEX3-3.3/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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