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Analog Devices Inc./Maxim Integrated LM4050AEX3-3.3/V+
- Part No.:
- LM4050AEX3-3.3/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050AEX3-3.3/V+.pdf
- Description:
- 50PPM/C PRECISION MICROPOWER SHU
- Quantity:
- Payment:
- Shipping:
Inventory:2,056
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Product details
Overview
LM4050AEX3-3.3/V+ 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, and stable operation from -40°C to +125°C. It sinks 60µA–15mA reverse current with 0.3Ω dynamic impedance and 50µVRMS wideband noise (10Hz–10kHz), enabling high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4050AEX3-3.3/V+ datasheet, LM4050AEX3-3.3/V+ pinout, LM4050AEX3-3.3/V+ application, or LM4050AEX3-3.3/V+ equivalent, key selection criteria include guaranteed AEC-Q100 qualification for automotive use, no-output-capacitor stability, and compatibility with capacitive loads up to 1µF without oscillation.
Technical Context
The LM4050AEX3-3.3/V+ implements a laser-trimmed bandgap core with two-terminal shunt topology, operating as a precision zener-like element requiring only an external series resistor for regulation. Its internal architecture ensures low thermal hysteresis and minimal long-term drift (120ppm over 1000h).
It is specified across the full industrial–automotive temperature range (-40°C to +125°C) with guaranteed performance at 100µA operating current, and supports stable regulation under load transients up to ±2.5mA with <10µs response time-critical for battery-powered data acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3000 V ±3.0 mV at +25°C (0.1% grade); maintains ±0.6% total tolerance over -40°C to +125°C |
| Initial Accuracy | ±0.1% - enables direct replacement of higher-cost references in 12-bit to 16-bit SAR ADC reference chains |
| Tempco | ±50 ppm/°C max - ensures ≤±0.5% output shift across full temperature range, suitable for unheated automotive cabin modules |
| Shunt Current Range | 60 µA to 15 mA - supports ultra-low-power sensor nodes (e.g., 60 µA minimum enables 10-year coin-cell operation) |
| Dynamic Impedance | 0.3 Ω typical at 1 mA - minimizes output voltage perturbation during fast load steps in precision analog front-ends |
| Wideband Noise | 50 µVRMS (10 Hz–10 kHz) - meets noise floor requirements for 16-bit delta-sigma ADCs without additional filtering |
| AEC-Q100 Grade | Qualified per Rev G - certified for automotive powertrain and body electronics applications requiring zero-defect reliability |
Pinout & Package
LM4050AEX3-3.3/V+ uses the 3-pin SC70 package (1.8 mm × 1.8 mm), optimized for space-constrained PCB layouts. Pin 3 is NC (no connection) and must be left floating or tied to Pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Positive terminal (anode) | Connected to system ground or low-impedance return path; forms cathode-to-anode reference node with Pin 2 |
| Pin 2 (–) | Negative terminal (cathode) | Reference output node; voltage appears between Pin 2 and Pin 1; sinks all shunt and load current |
| Pin 3 (N.C.) | No connection | Must remain unconnected or shorted to Pin 2; not internally bonded - floating connection avoids parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70 footprint | 50% smaller than SOT23 equivalents - saves >0.5 mm² board area per reference in multi-rail PMIC designs |
| No output capacitor required | Stable with any capacitive load up to 1 µF - eliminates BOM cost and layout risk of external stabilization caps |
| Guaranteed AEC-Q100 qualification | Validated for automotive Grade 1 (-40°C to +125°C) - supports functional safety compliance without derating |
| Low micropower operation | 60 µA minimum shunt current - enables use in always-on wake-up circuits with sub-1 µA quiescent system power |
| Laser-trimmed accuracy | 0.1% initial tolerance maintained across temperature - reduces calibration overhead in factory programming |
Applications
| Portable Medical Sensors | Automotive Cabin Controllers |
|---|---|
|
Use Scenario: Battery-powered ECG front-end with 16-bit ADC sampling at 1 kSPS. IC Role / Device Role / Timing Role: Provides stable 3.3V reference for ADC VREF input and op-amp biasing. Use Value: 50 µVRMS noise and ±0.6% total error ensure <0.01% gain error and <1 LSB INL deviation over temperature. |
Use Scenario: HVAC control module in passenger compartment with ambient temperature swing from -40°C to +85°C. IC Role / Device Role / Timing Role: Supplies reference voltage for thermistor measurement circuit and microcontroller ADC. Use Value: AEC-Q100 qualification and ±50 ppm/°C tempco guarantee consistent sensor linearity without software compensation. |
| Industrial Data Loggers | Smart Energy Meters |
|
Use Scenario: Solar-powered remote environmental monitor logging temperature, humidity, and pressure every 10 minutes. IC Role / Device Role / Timing Role: Precision shunt reference for low-power SAR ADC measuring conditioned sensor outputs. Use Value: 60 µA minimum operating current extends 10-year battery life; SC70 size allows dense multi-channel sensor integration. |
Use Scenario: Revenue-grade electricity meter requiring metrology-grade voltage reference for current-sense amplifier bias. IC Role / Device Role / Timing Role: Stable 3.3V reference for isolated sigma-delta modulator and energy calculation ASIC. Use Value: 120 ppm long-term stability over 1000 hours ensures <0.1% metering accuracy drift over 10-year field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431AIDBZR | Adjustable (2.5V–36V) 3-pin shunt; 0.5% initial accuracy; 90ppm/°C tempco; SOT23-3 | Requires external resistors for 3.3V setting; higher tempco increases error in wide-temperature automotive use | Select when adjustable output or higher voltage capability is needed; avoid where 0.1% accuracy and AEC-Q100 are mandatory |
| MAX6008AEUR+T | Fixed 3.3V shunt; 0.2% initial accuracy; 75ppm/°C tempco; SOT23-3; no AEC-Q100 rating | Lacks automotive qualification; wider tolerance and higher tempco reduce confidence in uncalibrated systems | Acceptable for commercial-grade portable equipment but not for automotive or industrial safety-critical functions |
Compared with TLVH431AIDBZR and MAX6008AEUR+T, LM4050AEX3-3.3/V+ delivers superior accuracy (0.1% vs. ≥0.2%), tighter tempco (±50ppm/°C vs. ≥75ppm/°C), and AEC-Q100 certification - making it the only choice for automotive-qualified, space-constrained, high-stability reference needs.
Availability
LM4050AEX3-3.3/V+ is available at Aetrix Electronics and suitable for automotive cabin controllers, portable medical sensors, and industrial data loggers requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4050AEX3-3.3/V+ 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 stability, and automotive-grade reliability - targeting next-generation battery-powered and safety-critical systems.
FAQ
What is the maximum shunt current supported by LM4050AEX3-3.3/V+?
The LM4050AEX3-3.3/V+ supports a maximum shunt current of 15 mA under normal operation, with absolute maximum rating at 20 mA. Exceeding 15 mA risks exceeding thermal limits in the SC70 package, especially above +70°C ambient. For continuous 15 mA operation, ensure junction temperature remains ≤+150°C using appropriate PCB copper area and thermal vias.
Does LM4050AEX3-3.3/V+ require an external output capacitor for stability?
No, LM4050AEX3-3.3/V+ does not require an external output capacitor and is stable with any capacitive load up to 1 µF. This eliminates capacitor-related BOM cost, placement error risk, and board space - a key advantage over many competing shunt references that mandate specific COUT values for phase margin.
Is LM4050AEX3-3.3/V+ qualified for automotive applications?
Yes, LM4050AEX3-3.3/V+ is AEC-Q100 qualified (Grade 1, -40°C to +125°C) and explicitly listed in the datasheet's Ordering Information table with the "/V+" suffix denoting automotive qualification. This makes it suitable for engine control units, ADAS sensors, and body electronics without additional qualification testing.
What is the pin configuration and NC pin handling requirement for LM4050AEX3-3.3/V+?
LM4050AEX3-3.3/V+ uses a 3-pin SC70 package: Pin 1 (+) is the anode (ground reference), Pin 2 (–) is the cathode (output node), and Pin 3 is NC (no connection). Per datasheet Figure 1, Pin 3 must be left unconnected or tied directly to Pin 2 - it is not internally bonded and floating connection prevents stray coupling.
How does the 0.1% initial accuracy of LM4050AEX3-3.3/V+ translate to system-level performance?
The 0.1% initial accuracy of LM4050AEX3-3.3/V+ contributes directly to end-system gain error - for example, in a 3.3V-referenced 16-bit ADC, it limits full-scale error to ±66 LSB before calibration. Combined with ±50ppm/°C tempco, total error stays within ±0.6% over -40°C to +125°C, enabling single-point calibration in many automotive and industrial applications.
LM4050AEX3-3.3/V+ 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+ FAQ
1.How can I place an order for LM4050AEX3-3.3/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEX3-3.3/V+ 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+ reliable?
The price and inventory of LM4050AEX3-3.3/V+ 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+ is usually 5 days.
3.What payment methods are accepted for LM4050AEX3-3.3/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEX3-3.3/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEX3-3.3/V+?
LM4050AEX3-3.3/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEX3-3.3/V+ 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+?
For technical support, including LM4050AEX3-3.3/V+ 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+ requirements.
6.How does Aetrix verify that LM4050AEX3-3.3/V+ is sourced from the original manufacturer or authorized distributors?
All LM4050AEX3-3.3/V+ 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+ meets industry standards.
7.What is the process for return or replacement of LM4050AEX3-3.3/V+?
All LM4050AEX3-3.3/V+ units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEX3-3.3/V+, 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+ part is unused and in its original packaging.
Return procedure for LM4050AEX3-3.3/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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