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Analog Devices Inc./Maxim Integrated LM4050BEX3-2.5+T
- Part No.:
- LM4050BEX3-2.5+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050BEX3-2.5+T.pdf
- Description:
- IC VREF SHUNT 0.2% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,695
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Product details
Overview
LM4050BEX3-2.5+T from Analog Devices is a precision 2.500 V, 0.2% 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, low 35 µVRMS noise (10 Hz–10 kHz), and no external capacitor requirement-ideal for high-accuracy ADC/DAC biasing in space-constrained portable instrumentation.
For engineers reviewing the LM4050BEX3-2.5+T datasheet, LM4050BEX3-2.5+T pinout, LM4050BEX3-2.5+T application, or LM4050BEX3-2.5+T equivalent, key selection criteria include guaranteed 0.2% initial tolerance at +25°C, ±5.0 mV total voltage tolerance over full temperature range, SC70 thermal resistance (θJA = 340.4°C/W), and compatibility with capacitive loads without instability.
Technical Context
The LM4050BEX3-2.5+T implements a laser-trimmed bandgap core with two-terminal shunt topology, delivering stable reverse breakdown voltage without series pass elements. Its internal architecture maintains regulation by sinking variable current through an external series resistor (RS) while holding cathode-to-anode voltage at precisely 2.500 V across 60 µA–15 mA operating range.
It guarantees ±50 ppm/°C tempco over –40°C to +125°C, exhibits <0.8 Ω dynamic impedance at 1 mA, and achieves long-term stability of 120 ppm after 1000 hours. The device tolerates any output capacitance and requires no output capacitor-enabling direct integration into high-PSRR analog front-ends and battery-powered sensor nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal at +25°C; LM4050B grade ensures ±5.0 mV (±0.2%) tolerance at 25°C and ±18 mV (±0.72%) over full –40°C to +125°C range. |
| Initial Accuracy | 0.2% maximum at +25°C-enables single-point calibration in precision data acquisition systems without trimming. |
| Tempco | 50 ppm/°C maximum-limits voltage drift to ±12.5 mV over 100°C span, critical for automotive and industrial temperature monitoring. |
| Shunt Current Range | 60 µA to 15 mA-supports ultra-low-power sensor biasing (e.g., 60 µA × 2.5 V = 150 µW) and higher-current DAC references up to 37.5 mW dissipation. |
| Output Noise | 35 µVRMS (10 Hz–10 kHz)-low enough for 16-bit SAR ADCs requiring <1 LSB noise contribution at 2.5 V full-scale. |
| Dynamic Impedance | 0.3–0.8 Ω at 1 mA-ensures minimal load-induced voltage shift (<0.8 mV at 1 mA load step), vital for stable feedback in precision regulators. |
| Long-Term Stability | 120 ppm after 1000 hours-predictable aging behavior supports 10+ year field reliability in medical and test equipment. |
Pinout & Package
LM4050BEX3-2.5+T uses a 3-pin SC70 package (1.8 mm × 1.8 mm), 50% smaller than SOT23, with thermal resistance θJA = 340.4°C/W on four-layer board. Pin 3 is NC (must be left unconnected or tied to pin 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Positive terminal (anode) | Connects to system ground or low-impedance return path; forms reference node with pin 2. |
| 2 (–) | Negative terminal (cathode) | Output node where regulated 2.500 V appears; sinks all shunt and load current. |
| 3 (N.C.) | No connection | Must remain floating or shorted to pin 2; no internal connection-omitting this causes no functional impact. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70 footprint | 1.8 mm × 1.8 mm area saves >50% PCB space vs. SOT23-critical for wearable biosensors and miniaturized IoT edge nodes. |
| No output capacitor required | Guaranteed stability with any capacitive load eliminates BOM cost, layout risk, and startup delay from capacitor charging. |
| Wide shunt current range | 60 µA minimum enables operation from microcontroller GPIOs or low-quiescent LDOs; 15 mA max supports multi-channel analog circuits. |
| Low wideband noise | 35 µVRMS (10 Hz–10 kHz) meets SNR requirements for 16-bit precision converters without additional filtering. |
| AEC-Q100 qualified variants available | LM4050BEX3-2.5/V+T version meets automotive stress testing-LM4050BEX3-2.5+T shares identical electrical specs but lacks AEC labeling. |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Battery-powered ECG front-end measuring microvolt-level biopotentials with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 2.500 V reference for ADC VREF and op-amp biasing, rejecting supply ripple and temperature drift. Use Value: 0.2% initial accuracy and 50 ppm/°C tempco ensure <±0.72% total error over –20°C to +70°C operating range-meeting IEC 60601 clinical accuracy requirements. |
Use Scenario: Ruggedized environmental monitor logging temperature, humidity, and gas concentration in factory settings. IC Role / Device Role / Timing Role: Supplies precision reference to multiple sigma-delta ADCs and RTD bridge circuits across wide ambient (-40°C to +85°C). Use Value: Guaranteed operation to +125°C junction temperature and 120 ppm long-term stability enable 10-year uncalibrated field deployment without drift compensation. |
| Automotive Cabin Controllers | Test & Measurement Equipment |
Use Scenario: HVAC control module regulating cabin air quality sensors and display backlight dimming via PWM. IC Role / Device Role / Timing Role: References ADC inputs for CO₂ and VOC sensors and sets DAC output for LED current control. Use Value: SC70 package withstands automotive vibration; 0.2% accuracy and no capacitor requirement simplify layout in EMI-sensitive infotainment zones. |
Use Scenario: Benchtop multimeter calibrating 4½-digit DMMs using internal 2.5 V reference ladder. IC Role / Device Role / Timing Role: Primary voltage standard for self-calibration sequence, traceable to factory laser-trimmed resistors. Use Value: 35 µVRMS noise and <0.8 Ω dynamic impedance prevent measurement uncertainty from reference instability during auto-ranging transitions. |
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 package. | Requires two external resistors for 2.5 V setting; higher tempco increases drift in wide-temperature deployments. | Select when adjustable output or higher voltage capability is needed; avoid for fixed 2.5 V metrology-grade use. |
| ADR3425ARJZ-R7 | 2.5 V series reference; 0.1% initial accuracy; 10 ppm/°C tempco; SOT23-5 package; 500 µA quiescent current. | Series topology demands minimum load current; larger footprint and higher power consumption limit battery life. | Choose for ultra-low-drift applications where supply headroom allows series configuration and PCB area permits SOT23-5. |
Compared with TLVH431ACDBVR and ADR3425ARJZ-R7, LM4050BEX3-2.5+T offers optimal balance of fixed 2.5 V accuracy, ultra-small SC70 size, zero external components, and micropower operation-making it superior for space- and energy-constrained embedded systems requiring guaranteed 0.2% tolerance.
Availability
LM4050BEX3-2.5+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, automotive cabin controllers, and test & measurement equipment requiring stable component supply with guaranteed long-term availability.
Supply support for LM4050BEX3-2.5+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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
LM4050/LM4051 is part of Analog Devices' precision voltage reference product line, engineered for metrology-grade accuracy, low noise, and robust operation in harsh environments-from battery-powered wearables to automotive and industrial control systems.
FAQ
What is the guaranteed initial accuracy of LM4050BEX3-2.5+T at +25°C?
The LM4050BEX3-2.5+T is specified with ±0.2% initial accuracy at +25°C, corresponding to ±5.0 mV tolerance around its nominal 2.500 V output. This grade (B) is laser-trimmed and 100% production tested per Analog Devices' datasheet Rev 16, ensuring compliance before shipment.
Does LM4050BEX3-2.5+T require an external output capacitor for stability?
No, LM4050BEX3-2.5+T does not require an external output capacitor. Its internal design ensures unconditional stability with any capacitive load, eliminating BOM cost, layout complexity, and potential startup oscillation issues common in shunt references.
What is the operating temperature range for LM4050BEX3-2.5+T?
LM4050BEX3-2.5+T is fully specified and guaranteed over –40°C to +125°C ambient temperature. All key parameters-including output voltage, tempco, and dynamic impedance-are characterized across this range per the datasheet's Electrical Characteristics tables.
How does the SC70 package of LM4050BEX3-2.5+T compare thermally to SOT23?
LM4050BEX3-2.5+T in SC70 has θJA = 340.4°C/W on a four-layer board, slightly higher than SOT23's 336°C/W. However, its 50% smaller footprint reduces thermal mass, enabling faster thermal response-critical in pulsed-load applications like portable sensor wake-up cycles.
Can LM4050BEX3-2.5+T be used in automotive applications?
Yes-while LM4050BEX3-2.5+T itself is not AEC-Q100 certified, the functionally identical LM4050BEX3-2.5/V+T variant is qualified. Both share identical electrical specs, SC70 packaging, and -40°C to +125°C rating, making LM4050BEX3-2.5+T suitable for non-safety-critical automotive subsystems pending qualification review.
LM4050BEX3-2.5+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:
- ±0.2%
- 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
LM4050BEX3-2.5+T FAQ
1.How can I place an order for LM4050BEX3-2.5+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BEX3-2.5+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 LM4050BEX3-2.5+T reliable?
The price and inventory of LM4050BEX3-2.5+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BEX3-2.5+T is usually 5 days.
3.What payment methods are accepted for LM4050BEX3-2.5+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BEX3-2.5+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BEX3-2.5+T?
LM4050BEX3-2.5+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BEX3-2.5+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 LM4050BEX3-2.5+T?
For technical support, including LM4050BEX3-2.5+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BEX3-2.5+T requirements.
6.How does Aetrix verify that LM4050BEX3-2.5+T is sourced from the original manufacturer or authorized distributors?
All LM4050BEX3-2.5+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 LM4050BEX3-2.5+T meets industry standards.
7.What is the process for return or replacement of LM4050BEX3-2.5+T?
All LM4050BEX3-2.5+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BEX3-2.5+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 LM4050BEX3-2.5+T part is unused and in its original packaging.
Return procedure for LM4050BEX3-2.5+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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