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Analog Devices Inc./Maxim Integrated LM4050CEX3-3.0+T
- Part No.:
- LM4050CEX3-3.0+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050CEX3-3.0+T.pdf
- Description:
- IC VREF SHUNT 0.5% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:14,775
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Product details
Overview
LM4050CEX3-3.0+T from Analog Devices is a precision 3.000 V, ±0.5% initial accuracy, 50 ppm/°C max temperature coefficient shunt voltage reference in a 3-pin SC70 package. It operates over -40°C to +125°C with 60 µA to 15 mA shunt current capability and 45 µVRMS wideband noise (10 Hz–10 kHz), enabling stable reference generation in space-constrained portable power systems.
For engineers reviewing the LM4050CEX3-3.0+T datasheet, LM4050CEX3-3.0+T pinout, LM4050CEX3-3.0+T application, or LM4050CEX3-3.0+T equivalent, key selection criteria include guaranteed reverse breakdown voltage tolerance over full temperature range, no-output-capacitor stability, micropower operation down to 60 µA, and AEC-Q100-qualified variants for automotive use.
Technical Context
The LM4050CEX3-3.0+T implements a laser-trimmed bandgap shunt reference architecture, delivering fixed 3.000 V reverse breakdown voltage with guaranteed ±0.5% initial accuracy and ≤50 ppm/°C tempco across -40°C to +125°C. Its two-terminal configuration requires only an external series resistor for biasing and load regulation.
It maintains low dynamic impedance (≤0.9 Ω at 1 mA) and tolerates any capacitive load without external compensation. The device clamps to ~0.7 V below ground under forward conduction (≤10 mA), supporting bidirectional protection in mixed-polarity circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000 V nominal reverse breakdown voltage, with ±0.5% initial accuracy (±15 mV) at +25°C |
| Temperature Coefficient | ≤50 ppm/°C max over -40°C to +125°C - ensures ≤±1.5 mV total drift across full operating range |
| Operating Current Range | 60 µA to 15 mA shunt current - supports ultra-low-power sensor nodes and high-current ADC references |
| Dynamic Impedance | ≤0.9 Ω at 1 mA - minimizes output voltage variation under load transients |
| Wideband Noise | 45 µVRMS (10 Hz–10 kHz) - suitable for high-resolution 16-bit+ data converters |
| Long-Term Stability | 120 ppm after 1000 hours - predictable aging behavior for mission-critical calibration |
| Package | 3-pin SC70 (1.8 mm × 1.8 mm) - 50% smaller than SOT23, ideal for PCB area-constrained designs |
Pinout & Package
LM4050CEX3-3.0+T uses a 3-pin SC70 surface-mount package (outline 21-0075, land pattern 90-0208). Pin 3 is unconnected (N.C.) and must be left floating or tied to Pin 2 per datasheet guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Positive terminal (anode) | Reference output node; connects to load and feedback point in shunt regulator topology |
| Pin 2 (–) | Negative terminal (cathode) | Ground reference node; ties to system ground or return path of bias resistor |
| Pin 3 (N.C.) | No connection | Must remain unconnected or shorted to Pin 2 - not used for signal or thermal enhancement |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70 package | 1.8 mm × 1.8 mm footprint enables placement in dense portable electronics (e.g., wearables, IoT sensors) |
| No output capacitor required | Internally compensated for stability with any capacitive load - eliminates BOM cost and layout risk |
| Guaranteed 50 ppm/°C tempco | Ensures predictable voltage drift across industrial and automotive temperature ranges without calibration |
| 60 µA minimum operating current | Enables operation from high-impedance sources (e.g., battery monitors, energy-harvesting circuits) |
| AEC-Q100 qualified variants available | Supports automotive applications requiring reliability validation (e.g., body control modules, ADAS sensors) |
Applications
| Portable Medical Sensors | Notebook Power Management |
|---|---|
|
Use Scenario: Reference for 16-bit SAR ADC measuring ECG/SpO₂ signals in battery-powered wearable monitors. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 3.000 V reference for analog front-end precision conversion. Use Value: 45 µVRMS noise and ≤50 ppm/°C tempco preserve signal integrity and measurement repeatability across ambient temperature shifts. |
Use Scenario: Precision reference for system voltage supervisor ICs and buck converter feedback networks in ultrabooks. IC Role / Device Role / Timing Role: Two-terminal shunt reference generating accurate 3.000 V threshold for brown-out detection and rail monitoring. Use Value: Guaranteed ±0.5% initial accuracy and 60 µA–15 mA operating range enable reliable operation across varying load and supply conditions. |
| Automotive Cabin Sensors | Industrial Process Transmitters |
|
Use Scenario: Reference for pressure/temperature sensor signal conditioning in HVAC control modules. IC Role / Device Role / Timing Role: AEC-Q100-compatible shunt reference supplying stable 3.000 V to instrumentation amplifiers and DACs. Use Value: -40°C to +125°C guaranteed operation and 120 ppm long-term stability support 15-year automotive lifecycle requirements. |
Use Scenario: Calibration reference in 4–20 mA loop-powered field transmitters for flow/level sensing. IC Role / Device Role / Timing Role: Micropower shunt reference operating from loop current (≤4 mA quiescent) while maintaining 3.000 V accuracy. Use Value: 60 µA minimum current and SC70 size allow integration into compact, intrinsically safe transmitter housings. |
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 (2.5 V–36 V) 3-pin shunt reference; 0.5% initial accuracy; 100 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; verify layout compatibility with larger SOT23 footprint |
| MAX6003EUR+T | Fixed 3.0 V shunt reference; 0.2% initial accuracy; 50 ppm/°C tempco; SC70-3; 50 µA min current | Higher initial accuracy but lower max shunt current (10 mA vs. 15 mA); same package and noise performance | Prefer for tighter initial tolerance requirements where load current stays ≤10 mA; confirm long-term stability (100 ppm vs. 120 ppm) |
Compared with TLVH431ACDBVR and MAX6003EUR+T, LM4050CEX3-3.0+T offers the widest shunt current range (60 µA–15 mA) in SC70, making it optimal for applications spanning micropower sensing and moderate-current regulation - without sacrificing tempco or noise performance.
Availability
LM4050CEX3-3.0+T is available at Aetrix Electronics and suitable for portable medical sensors, notebook power management, automotive cabin sensors, and industrial process transmitters requiring stable component supply and guaranteed long-term availability.
Supply support for LM4050CEX3-3.0+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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The LM4050/LM4051 family was designed specifically for precision, low-power, space-constrained shunt reference applications - targeting portable, automotive, and industrial systems where stability, small size, and guaranteed specifications are critical.
FAQ
What is the guaranteed reverse breakdown voltage tolerance of LM4050CEX3-3.0+T over its full temperature range?
The LM4050CEX3-3.0+T guarantees ±0.5% initial accuracy at +25°C and ≤50 ppm/°C temperature coefficient, resulting in a total voltage tolerance of ±1.0% (±30 mV) over -40°C to +125°C. This is confirmed by datasheet Note 3 and Electrical Characteristics tables for the C-grade 3.000 V variant.
Can LM4050CEX3-3.0+T operate without an external output capacitor?
Yes, LM4050CEX3-3.0+T is internally compensated and does not require an external output capacitor for stability. It remains stable with any capacitive load, including bypass caps up to several microfarads - eliminating a common source of design risk and BOM cost.
What is the minimum shunt current required for LM4050CEX3-3.0+T to maintain regulation?
The LM4050CEX3-3.0+T requires a minimum shunt current of 67 µA (typical) and 60 µA (guaranteed) to maintain specified reverse breakdown voltage accuracy across temperature. Below this, output voltage deviates beyond datasheet limits - verified in Electrical Characteristics Table on page 4.
Is LM4050CEX3-3.0+T qualified for automotive applications?
LM4050CEX3-3.0+T itself is not AEC-Q100 qualified; however, the LM4050CEX3-3.0/V+T variant (same SC70 package, identical electrical specs) is explicitly AEC-Q100 qualified per datasheet Ordering Information. For automotive use, specify the /V suffix version.
How does the SC70 package of LM4050CEX3-3.0+T compare thermally to the SOT23 option?
The SC70 package (LM4050CEX3-3.0+T) has θJA = 340.4°C/W on a four-layer board, slightly higher than the SOT23's 336°C/W. Both packages share the same maximum junction temperature (150°C) and operating range (-40°C to +125°C), so thermal design margins remain comparable with proper PCB copper area.
LM4050CEX3-3.0+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:
- ±0.5%
- 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
LM4050CEX3-3.0+T FAQ
1.How can I place an order for LM4050CEX3-3.0+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CEX3-3.0+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 LM4050CEX3-3.0+T reliable?
The price and inventory of LM4050CEX3-3.0+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CEX3-3.0+T is usually 5 days.
3.What payment methods are accepted for LM4050CEX3-3.0+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CEX3-3.0+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CEX3-3.0+T?
LM4050CEX3-3.0+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CEX3-3.0+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 LM4050CEX3-3.0+T?
For technical support, including LM4050CEX3-3.0+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CEX3-3.0+T requirements.
6.How does Aetrix verify that LM4050CEX3-3.0+T is sourced from the original manufacturer or authorized distributors?
All LM4050CEX3-3.0+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 LM4050CEX3-3.0+T meets industry standards.
7.What is the process for return or replacement of LM4050CEX3-3.0+T?
All LM4050CEX3-3.0+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CEX3-3.0+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 LM4050CEX3-3.0+T part is unused and in its original packaging.
Return procedure for LM4050CEX3-3.0+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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