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Analog Devices Inc./Maxim Integrated LM4050AEX3-2.5+T
- Part No.:
- LM4050AEX3-2.5+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050AEX3-2.5+T.pdf
- Description:
- IC VREF SHUNT 0.1% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,227
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Product details
Overview
LM4050AEX3-2.5+T from Analog Devices is a precision 2.500 V, 0.1% 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 35 µVRMS wideband noise (10 Hz–10 kHz), enabling stable reference generation in space-constrained portable power systems.
For engineers reviewing the LM4050AEX3-2.5+T datasheet, LM4050AEX3-2.5+T pinout, LM4050AEX3-2.5+T application, or LM4050AEX3-2.5+T equivalent, key selection criteria include guaranteed initial tolerance (±2.5 mV at +25°C), low dynamic impedance (0.3–0.8 Ω), no external capacitor requirement, and AEC-Q100 qualification for automotive use cases.
Technical Context
The LM4050AEX3-2.5+T implements a laser-trimmed bandgap shunt reference architecture, delivering fixed 2.500 V reverse breakdown voltage with guaranteed ±0.1% initial accuracy and ±50 ppm/°C tempco across -40°C to +125°C. Its two-terminal topology eliminates need for external biasing circuitry beyond a series resistor.
It maintains regulation without output capacitance and tolerates arbitrary capacitive loads due to inherent stability design. Dynamic impedance remains ≤0.8 Ω at 1 mA, ensuring minimal voltage shift under load transients up to 15 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±2.5 mV at +25°C - defines precise ADC/DAC reference point with known error bound |
| Initial Accuracy | 0.1% (±2.5 mV) - enables high-resolution measurement without calibration |
| Tempco | 50 ppm/°C max - limits drift to ±12.5 mV over full -40°C to +125°C range |
| Shunt Current Range | 60 µA to 15 mA - supports micropower sensor nodes and higher-current analog subsystems |
| Wideband Noise | 35 µVRMS (10 Hz–10 kHz) - minimizes noise contribution in precision data acquisition |
| Dynamic Impedance | 0.3–0.8 Ω at 1 mA - ensures <1 mV output shift under 1 mA load step |
| Long-Term Stability | 120 ppm (1000 h) - predicts <0.12% output drift over 1 year of operation |
Pinout & Package
Package: 3-pin SC70 (1.8 mm × 1.8 mm), ultra-small surface-mount footprint with 50% area reduction vs. SOT23.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Positive terminal (anode) | Reference output node; connects to load and feedback network |
| 2 (-) | Negative terminal (cathode) | Ground reference; must be connected to system ground |
| 3 (N.C.) | No connection | Must be left unconnected or tied to Pin 2 - floating or misconnected risks parametric deviation |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed resistors | Enables 0.1% initial accuracy without post-package trimming |
| No output capacitor required | Eliminates BOM cost and layout area for stabilization capacitor |
| Tolerates capacitive loads | Supports direct connection to ADC input caps or long PCB traces without oscillation |
| AEC-Q100 qualified | Validated for automotive applications including engine control and ADAS sensors |
| Ultra-small SC70 package | 1.8 mm × 1.8 mm footprint ideal for wearables and compact IoT modules |
Applications
| Portable Medical Sensors | Automotive Engine Control Units |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters requiring stable 2.5 V reference for 16-bit ADCs. IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and conversion reference for analog front-end. Use Value: 0.1% initial accuracy and 35 µVRMS noise ensure <±0.005% measurement error without calibration. | Use Scenario: Fuel injection timing circuits in engine control units operating at 125°C ambient. IC Role / Device Role / Timing Role: Precision reference for microcontroller ADC sampling of throttle position and oxygen sensors. Use Value: Guaranteed operation from -40°C to +125°C with 50 ppm/°C tempco ensures consistent sensor linearity across thermal cycles. |
| Industrial Data Acquisition Modules | Wireless Sensor Node Transceivers |
Use Scenario: 4–20 mA loop-powered field transmitters measuring pressure and temperature. IC Role / Device Role / Timing Role: Reference source for DAC generating loop current and for internal ADC monitoring supply rail. Use Value: 60 µA minimum operating current enables operation down to 3.3 V supply while maintaining regulation. | Use Scenario: Sub-GHz RF transceiver modules (e.g., LoRaWAN nodes) with intermittent wake-up and low-quiescent-power operation. IC Role / Device Role / Timing Role: Stable reference for RSSI measurement and crystal oscillator biasing during active transmit/receive phases. Use Value: SC70 package and micropower shunt architecture reduce board area and standby current impact on battery 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 |
|---|---|---|---|
| TLVH431AIDBVR | Adjustable (2.5 V set via resistors), 0.5% initial accuracy, 100 ppm/°C tempco, SOT23-3 | Requires external resistors; less accurate and less stable over temperature than LM4050AEX3-2.5+T | Select when adjustable output or cost sensitivity outweighs precision requirements |
| REF3025AIDBZR | Series reference, 0.2% initial accuracy, 50 ppm/°C tempco, 1.2 µA quiescent, SOT23-3 | Higher output impedance, requires minimum load current, not shunt topology | Select when low quiescent current and series topology compatibility are critical |
Compared with TLVH431AIDBVR and REF3025AIDBZR, the LM4050AEX3-2.5+T delivers superior initial accuracy (0.1% vs. 0.5%/0.2%), guaranteed shunt stability without external components, and tighter tempco control-making it optimal for high-precision, space-constrained, and automotive-grade designs where fixed 2.5 V reference is acceptable.
Availability
LM4050AEX3-2.5+T is available at Aetrix Electronics and suitable for portable medical sensors, automotive engine control units, industrial data acquisition modules, and wireless sensor node transceivers requiring stable component supply with guaranteed long-term availability.
Supply support for LM4050AEX3-2.5+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 precision instrumentation, industrial automation, and automotive markets.
The LM4050/LM4051 product line delivers precision shunt voltage references optimized for space-constrained, high-accuracy applications demanding low noise, wide temperature operation, and AEC-Q100 compliance.
FAQ
What is the guaranteed initial accuracy of the LM4050AEX3-2.5+T at +25°C?
The LM4050AEX3-2.5+T guarantees ±0.1% initial accuracy at +25°C, corresponding to ±2.5 mV around its nominal 2.500 V output. This specification is laser-trimmed and production-tested per Analog Devices' datasheet (page 4, Electrical Characteristics-2.500V). The LM4050AEX3-2.5+T achieves this without post-assembly calibration, making it suitable for high-precision measurement systems.
Does the LM4050AEX3-2.5+T require an external output capacitor for stability?
No, the LM4050AEX3-2.5+T does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including direct connection to ADC input capacitors or long PCB traces. This eliminates BOM cost and layout complexity. The LM4050AEX3-2.5+T maintains regulation across its full 60 µA–15 mA shunt current range without oscillation, as confirmed in the datasheet's "Output Capacitance" section (page 11).
What is the maximum operating temperature range for the LM4050AEX3-2.5+T?
The LM4050AEX3-2.5+T is specified for continuous operation from -40°C to +125°C. This extended temperature range is guaranteed across all electrical parameters, including initial accuracy, tempco, and dynamic impedance. The device uses BiCMOS process technology and is AEC-Q100 qualified for automotive applications, as documented in the Ordering Information table (page 12) and Absolute Maximum Ratings (page 2).
How does the LM4050AEX3-2.5+T differ from the SOT23-packaged LM4050AEM3-2.5+T?
The LM4050AEX3-2.5+T uses a 3-pin SC70 package (1.8 mm × 1.8 mm), while the LM4050AEM3-2.5+T uses a 3-pin SOT23 package (2.9 mm × 1.6 mm). Both share identical electrical specifications: 2.500 V output, 0.1% initial accuracy, 50 ppm/°C tempco, and -40°C to +125°C operation. The LM4050AEX3-2.5+T reduces board area by ~50%, making it preferred for ultra-compact designs where space is constrained.
What is the wideband noise performance of the LM4050AEX3-2.5+T?
The LM4050AEX3-2.5+T delivers 35 µVRMS wideband noise over 10 Hz to 10 kHz, measured at 100 µA shunt current. This low-noise characteristic minimizes error in high-resolution data acquisition systems, such as 16-bit+ ADCs used in portable medical devices. The value is specified in the "Electrical Characteristics-2.500V" table (page 4) and confirmed in typical noise plots (Figure LM4050 toc16).
LM4050AEX3-2.5+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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4050AEX3-2.5+T FAQ
1.How can I place an order for LM4050AEX3-2.5+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEX3-2.5+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 LM4050AEX3-2.5+T reliable?
The price and inventory of LM4050AEX3-2.5+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AEX3-2.5+T is usually 5 days.
3.What payment methods are accepted for LM4050AEX3-2.5+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEX3-2.5+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEX3-2.5+T?
LM4050AEX3-2.5+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEX3-2.5+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 LM4050AEX3-2.5+T?
For technical support, including LM4050AEX3-2.5+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEX3-2.5+T requirements.
6.How does Aetrix verify that LM4050AEX3-2.5+T is sourced from the original manufacturer or authorized distributors?
All LM4050AEX3-2.5+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 LM4050AEX3-2.5+T meets industry standards.
7.What is the process for return or replacement of LM4050AEX3-2.5+T?
All LM4050AEX3-2.5+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEX3-2.5+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 LM4050AEX3-2.5+T part is unused and in its original packaging.
Return procedure for LM4050AEX3-2.5+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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