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Analog Devices Inc./Maxim Integrated LM4050BEX3-2.1+T
- Part No.:
- LM4050BEX3-2.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050BEX3-2.1+T.pdf
- Description:
- IC VREF SHUNT 0.2% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,064
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Product details
Overview
LM4050BEX3-2.1+T from Analog Devices is a precision 2.048 V, 0.2% initial accuracy, 50 ppm/°C 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 28 µVRMS wideband noise (10 Hz–10 kHz), enabling stable reference generation in space-constrained battery-powered systems.
For engineers reviewing the LM4050BEX3-2.1+T datasheet, LM4050BEX3-2.1+T pinout, LM4050BEX3-2.1+T application, or LM4050BEX3-2.1+T equivalent, key selection criteria include guaranteed initial tolerance, low-tempco performance across automotive temperature range, micropower operation down to 60 µA, SC70 footprint compatibility, and absence of required output capacitance.
Technical Context
The LM4050BEX3-2.1+T implements a laser-trimmed bandgap core with internal shunt regulation, delivering fixed 2.048 V reverse breakdown voltage without external compensation. Its dynamic impedance remains ≤0.8 Ω at 1 mA, ensuring minimal voltage shift under load transients.
Designed for high-reliability shunt reference use, it tolerates capacitive loads up to any value, requires no stabilization capacitor, and maintains stability across its full 60 µA–15 mA operating current range and -40°C to +125°C junction temperature envelope.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; ±4.0 mV (±0.2%) initial tolerance at +25°C ensures precise ADC/DAC biasing without calibration. |
| Tempco | ≤50 ppm/°C max over -40°C to +125°C; guarantees <±0.7% total voltage drift across full industrial/auto temperature range. |
| Operating Current | 60 µA to 15 mA shunt range; supports ultra-low-power sensor nodes and high-current precision DAC references. |
| Noise (10 Hz–10 kHz) | 28 µVRMS; enables high-resolution 16-bit+ data conversion without added filtering. |
| Dynamic Impedance | 0.3–0.8 Ω at 1 mA; minimizes output voltage variation during load current steps in feedback circuits. |
| Long-Term Stability | 120 ppm over 1000 hours; ensures reference integrity in mission-critical instrumentation and automotive ECUs. |
Pinout & Package
LM4050BEX3-2.1+T uses the 3-pin SC70 package (1.8 mm × 1.8 mm), optimized for high-density PCB layouts. Pin 3 is NC (no connection) and must be left unconnected or tied to Pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode / Positive Terminal | Connects to regulated output node; sinks current when reverse-biased to maintain 2.048 V across load. |
| Pin 2 (–) | Cathode / Negative Terminal | Reference ground return path; forms shunt loop with external series resistor and supply. |
| Pin 3 (N.C.) | No Connection | Must remain floating or shorted to Pin 2; no internal function-omitting trace saves layout area. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed accuracy | 0.2% initial tolerance (±4.0 mV at 2.048 V) eliminates system-level trimming in production test. |
| Ultra-small SC70 footprint | 1.8 mm × 1.8 mm body size reduces board area by 50% vs. SOT23, critical for wearables and compact modules. |
| No output capacitor required | Guaranteed stability with any capacitive load simplifies design, removes BOM cost, and avoids ESR-related drift. |
| Wide shunt current range | 60 µA minimum start-up current enables operation from microamp-level energy harvesters or standby rails. |
| AEC-Q100 qualified | Validated for automotive applications per /V versions; LM4050BEX3-2.1+T shares same process and reliability screening. |
Applications
| Portable Medical Sensors | Automotive Body Control Modules |
|---|---|
Use Scenario: Low-power glucose meter with 16-bit SAR ADC and coin-cell battery. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V for ADC full-scale calibration and sensor signal conditioning. Use Value: 28 µVRMS noise and 0.2% accuracy enable ±0.003% measurement linearity without post-calibration. | Use Scenario: Door module monitoring window position, seat occupancy, and mirror control. IC Role / Device Role / Timing Role: Precision voltage reference for analog front-end (AFE) sensing and LIN bus voltage monitoring. Use Value: -40°C to +125°C guaranteed operation and AEC-Q100 alignment ensure functional safety compliance. |
| Industrial IoT Edge Nodes | High-Resolution Data Acquisition Systems |
Use Scenario: Wireless pressure transmitter using LoRaWAN, powered by energy harvesting. IC Role / Device Role / Timing Role: Micropower shunt reference enabling sub-100 µA system sleep current while maintaining reference readiness. Use Value: 60 µA minimum operating current allows direct bias from harvested energy sources without LDO overhead. | Use Scenario: Benchtop multimeter with 24-bit delta-sigma ADC and auto-ranging. IC Role / Device Role / Timing Role: Primary reference for dual-slope integrator and gain-setting DACs in precision analog signal chain. Use Value: ≤0.8 Ω dynamic impedance and 50 ppm/°C tempco ensure <1 LSB error across temperature and supply variations. |
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 | 2.5 V fixed output; 0.5% initial accuracy; 100 ppm/°C max tempco; SOT23-3 package. | Higher voltage and looser tolerance limit use in 2.048 V–critical 16-bit systems; less suitable for automotive temp range. | Select only if 2.5 V output and relaxed accuracy suffice; verify thermal drift impact on system gain error. |
| MAX6008AEUR+T | 2.048 V output; 0.1% initial accuracy; 30 ppm/°C max tempco; SOT23-3 package; higher 100 µA min current. | Superior accuracy and tempco but larger SOT23 footprint and higher minimum current reduce micropower viability. | Prefer when highest stability is mandatory and SC70 area savings are secondary to spec margin. |
Compared with TLVH431ACDBVR and MAX6008AEUR+T, LM4050BEX3-2.1+T uniquely balances 0.2% accuracy, 50 ppm/°C tempco, SC70 size, and 60 µA start-up in a single AEC-Q100-aligned device-making it optimal for space- and power-constrained automotive and portable instrumentation.
Availability
LM4050BEX3-2.1+T is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, and industrial IoT edge nodes requiring stable component supply with guaranteed long-term availability.
Supply support for LM4050BEX3-2.1+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 micropower shunt voltage references optimized for space-constrained, high-accuracy applications demanding guaranteed tempco, low noise, and extended temperature operation-especially where SC70 packaging and AEC-Q100 qualification are essential.
FAQ
What is the exact output voltage and initial accuracy of LM4050BEX3-2.1+T?
The LM4050BEX3-2.1+T provides a nominal reverse breakdown voltage of 2.048 V with ±0.2% initial accuracy (±4.0 mV) at +25°C. This grade (B) is specified across the full -40°C to +125°C temperature range, and the part number suffix "2.1" explicitly denotes the 2.048 V variant per Analog Devices' ordering nomenclature.
Does LM4050BEX3-2.1+T require an external output capacitor for stability?
No, LM4050BEX3-2.1+T does not require an external output capacitor. It is internally compensated and guaranteed stable with any capacitive load-including zero capacitance-eliminating the need for additional components and reducing PCB area and BOM cost in precision reference designs.
What is the minimum operating current for LM4050BEX3-2.1+T, and why does it matter?
The LM4050BEX3-2.1+T has a guaranteed minimum operating current of 60 µA. This low threshold enables reliable startup and regulation in ultra-low-power applications such as energy-harvesting sensors and battery-backed systems where supply current is tightly constrained.
How is the SC70 package of LM4050BEX3-2.1+T different from SOT23 variants like LM4050BEM3-2.1+T?
The LM4050BEX3-2.1+T uses the 3-pin SC70 package (1.8 mm × 1.8 mm), which is 50% smaller than the SOT23-3 package used by LM4050BEM3-2.1+T. Both share identical electrical specs and temperature rating, but the SC70 version enables higher board density-critical for wearable and miniaturized automotive modules.
Is LM4050BEX3-2.1+T qualified for automotive applications?
Yes-LM4050BEX3-2.1+T is manufactured on the same AEC-Q100-qualified process as the /V automotive-grade variants (e.g., LM4050BEX3-2.1/V+T). While the standard part lacks the /V suffix, its datasheet specifies -40°C to +125°C operation, BiCMOS process, and reliability screening aligned with automotive requirements.
LM4050BEX3-2.1+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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 28µVrms
- 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
LM4050BEX3-2.1+T FAQ
1.How can I place an order for LM4050BEX3-2.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BEX3-2.1+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 LM4050BEX3-2.1+T reliable?
The price and inventory of LM4050BEX3-2.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BEX3-2.1+T is usually 5 days.
3.What payment methods are accepted for LM4050BEX3-2.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BEX3-2.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BEX3-2.1+T?
LM4050BEX3-2.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BEX3-2.1+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 LM4050BEX3-2.1+T?
For technical support, including LM4050BEX3-2.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BEX3-2.1+T requirements.
6.How does Aetrix verify that LM4050BEX3-2.1+T is sourced from the original manufacturer or authorized distributors?
All LM4050BEX3-2.1+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 LM4050BEX3-2.1+T meets industry standards.
7.What is the process for return or replacement of LM4050BEX3-2.1+T?
All LM4050BEX3-2.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BEX3-2.1+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 LM4050BEX3-2.1+T part is unused and in its original packaging.
Return procedure for LM4050BEX3-2.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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