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Analog Devices Inc./Maxim Integrated LM4050AEX3-2.1+T
- Part No.:
- LM4050AEX3-2.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050AEX3-2.1+T.pdf
- Description:
- IC VREF SHUNT 2.048V SC70
- Quantity:
- Payment:
- Shipping:
Inventory:2,313
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Product details
Overview
LM4050AEX3-2.1+T from Analog Devices is a precision 2.048V, 0.1% initial accuracy, 50ppm/°C max temperature coefficient shunt voltage reference in a 3-pin SC70 package (1.8mm × 1.8mm), rated for -40°C to +125°C operation and designed for space-constrained battery-powered systems requiring stable low-power reference voltage.
For engineers reviewing the LM4050AEX3-2.1+T datasheet, LM4050AEX3-2.1+T pinout, LM4050AEX3-2.1+T application, or LM4050AEX3-2.1+T equivalent, key selection criteria include guaranteed 60µA–15mA shunt-current range, 28µVRMS wideband noise (10Hz–10kHz), no external capacitor requirement, and AEC-Q100 qualification for automotive use cases.
Technical Context
The LM4050AEX3-2.1+T implements a laser-trimmed bandgap shunt architecture that maintains a precise 2.048V reverse breakdown voltage across its cathode-anode terminals when biased with 60µA to 15mA of reverse current. It operates as a two-terminal device with no internal regulation circuitry-voltage stability relies on external series resistance and load current management.
Its SC70-3 package features Pin 1 (+), Pin 2 (−), and Pin 3 (N.C., must be left unconnected or tied to Pin 2). Thermal performance is characterized by θJA = 340.4°C/W on a four-layer board, supporting operation up to +125°C ambient with proper power derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V ±2.0mV (0.1% initial accuracy at +25°C); ensures ADC/DAC reference stability within 2mV error at room temperature. |
| Tempco | ±50ppm/°C max over −40°C to +125°C; contributes ≤±10.2mV drift across full temperature range, critical for automotive and industrial sensors. |
| Shunt Current Range | 60µA to 15mA; enables operation from ultra-low-power sensor nodes (e.g., 60µA quiescent) to higher-load data acquisition circuits without external buffering. |
| Dynamic Impedance | 0.3Ω to 0.8Ω at 1mA/120Hz; provides low AC impedance for high-frequency noise rejection and fast load-transient response (e.g., <10µs settling). |
| Wideband Noise | 28µVRMS (10Hz–10kHz); supports high-resolution 16-bit+ analog signal chains where reference noise directly limits effective resolution. |
| Long-Term Stability | 120ppm (1000h); equates to ~0.25mV drift over 6 weeks, enabling reliable calibration retention in portable medical or test equipment. |
Pinout & Package
LM4050AEX3-2.1+T uses a 3-pin SC70 surface-mount package (1.8mm × 1.8mm, 0.95mm height), 50% smaller than SOT23, optimized for high-density PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode (output terminal) | Connected to system reference node; sinks shunt current to maintain 2.048V across load; requires external series resistor (RS) for biasing. |
| 2 (−) | Anode (ground/reference return) | Must be connected to system ground or low-impedance reference plane; forms the return path for shunt and load currents. |
| 3 (N.C.) | No connection | Internally unconnected; must remain floating or be shorted to Pin 2 per datasheet-never driven or used as a signal path. |
Key Features
| Feature | Design Value |
|---|---|
| 0.1% initial accuracy | Laser-trimmed resistor network ensures ±2.0mV absolute output tolerance at +25°C, eliminating need for system-level trimming in production test. |
| SC70-3 ultra-small footprint | 1.8mm × 1.8mm body size reduces PCB area by 50% vs. SOT23, enabling integration into wearables, hearing aids, and compact IoT edge nodes. |
| No output capacitor required | Stable with any capacitive load (0–∞), simplifying layout and removing risk of oscillation or startup delay caused by external COUT. |
| AEC-Q100 qualified | Validated for automotive applications per Grade 1 (−40°C to +125°C), supporting engine control, ADAS sensor modules, and infotainment power rails. |
| 28µVRMS noise (10Hz–10kHz) | Enables ≥16-bit effective resolution in precision data converters without additional filtering, reducing BOM count and signal-chain complexity. |
Applications
| Portable Medical Sensors | Automotive Cabin Sensors |
|---|---|
Use Scenario: Battery-powered pulse oximeter with 16-bit ADC measuring weak photodiode signals. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 2.048V reference for ADC full-scale range. Use Value: 0.1% initial accuracy and 28µVRMS noise ensure <0.001% measurement error and >90dB SNR, meeting ISO 80601 clinical accuracy requirements. |
Use Scenario: Occupancy detection module using MEMS accelerometer and low-power MCU in vehicle cabin. IC Role / Device Role / Timing Role: Precision reference for analog front-end conditioning and ADC conversion of sensor outputs. Use Value: AEC-Q100 qualification and ±50ppm/°C tempco guarantee consistent 2.048V reference across −40°C to +85°C cabin temperatures, preventing false occupancy triggers. |
| Industrial Wireless Transmitters | High-Density Data Acquisition Boards |
Use Scenario: LoRaWAN node monitoring temperature/humidity with 24-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Low-quiescent shunt reference supplying reference voltage to ADC and sensor excitation circuitry. Use Value: 60µA minimum operating current enables >10-year battery life in sleep mode while maintaining 2.048V accuracy during active measurement bursts. |
Use Scenario: 32-channel DAQ card for lab equipment requiring simultaneous high-resolution sampling. IC Role / Device Role / Timing Role: Per-channel or grouped reference source for multiple SAR ADCs sharing common 2.048V reference rail. Use Value: Ultra-low dynamic impedance (≤0.8Ω) prevents crosstalk-induced reference droop during multi-channel conversions, preserving channel-to-channel matching. |
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 1.24V–18V output; 0.5% initial accuracy; 100ppm/°C tempco; SOT23-3 package. | Requires external resistors to set 2.048V; higher tempco increases drift in wide-temperature environments. | Select when design flexibility (adjustable VREF) outweighs precision and thermal stability needs. |
| MAX6002EUR+T | Fixed 2.048V output; 0.2% initial accuracy; 75ppm/°C tempco; SOT23-3 package; 50µA–10mA range. | Lower accuracy and higher tempco reduce long-term stability; not AEC-Q100 qualified. | Choose for cost-sensitive industrial applications where ±4mV tolerance and non-automotive qualification are acceptable. |
Compared with TLVH431ACDBVR and MAX6002EUR+T, LM4050AEX3-2.1+T delivers superior 0.1% accuracy, lower 50ppm/°C tempco, AEC-Q100 compliance, and guaranteed 60µA–15mA operation-making it optimal for automotive, medical, and high-reliability portable systems demanding minimal reference error and drift.
Availability
LM4050AEX3-2.1+T is available at Aetrix Electronics and suitable for portable medical sensors, automotive cabin sensors, and industrial wireless transmitters requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4050AEX3-2.1+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 industrial, automotive, communications, and healthcare markets with precision signal chain solutions.
LM4050AEX3-2.1+T belongs to Analog Devices' precision shunt voltage reference product line, engineered for ultra-stable, low-noise, micropower operation in space-constrained and thermally demanding applications.
FAQ
What is the exact output voltage tolerance of LM4050AEX3-2.1+T at +25°C?
The LM4050AEX3-2.1+T has a guaranteed reverse breakdown voltage of 2.048V ±2.0mV (±0.1%) at +25°C, as specified in the Electrical Characteristics table for the "A" grade. This tight tolerance is achieved via laser trimming and ensures minimal calibration overhead in precision measurement systems using LM4050AEX3-2.1+T.
Can LM4050AEX3-2.1+T operate without an external capacitor?
Yes, LM4050AEX3-2.1+T does not require an external output capacitor for stability and remains stable with any capacitive load-including zero capacitance or large bulk capacitors-due to its inherent shunt topology and low dynamic impedance. This eliminates capacitor-related layout constraints and startup delays in designs using LM4050AEX3-2.1+T.
Is LM4050AEX3-2.1+T qualified for automotive applications?
Yes, LM4050AEX3-2.1+T is AEC-Q100 qualified (Grade 1) for operation from −40°C to +125°C, making it suitable for under-hood and cabin automotive applications such as sensor signal conditioning, ECU reference rails, and ADAS subsystems where reliability and thermal stability are critical for LM4050AEX3-2.1+T deployment.
What is the minimum shunt current required for LM4050AEX3-2.1+T to regulate properly?
The LM4050AEX3-2.1+T requires a minimum shunt current of 60µA to maintain regulation across its full temperature range. Below this threshold, output voltage may deviate beyond specification; therefore, external biasing resistor (RS) must be sized to ensure ≥60µA flows through LM4050AEX3-2.1+T even under worst-case supply and load conditions.
How does the SC70 package of LM4050AEX3-2.1+T compare to SOT23 in thermal performance?
The SC70-3 package of LM4050AEX3-2.1+T has a junction-to-ambient thermal resistance (θJA) of 340.4°C/W on a four-layer board-slightly higher than SOT23's 336°C/W-due to smaller pad area. However, its 50% smaller footprint enables denser layouts, and both packages share identical maximum junction temperature (150°C) and derating profiles for LM4050AEX3-2.1+T.
LM4050AEX3-2.1+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:
- ±0.1%
- 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
LM4050AEX3-2.1+T FAQ
1.How can I place an order for LM4050AEX3-2.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEX3-2.1+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 LM4050AEX3-2.1+T reliable?
The price and inventory of LM4050AEX3-2.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AEX3-2.1+T is usually 5 days.
3.What payment methods are accepted for LM4050AEX3-2.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEX3-2.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEX3-2.1+T?
LM4050AEX3-2.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEX3-2.1+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 LM4050AEX3-2.1+T?
For technical support, including LM4050AEX3-2.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEX3-2.1+T requirements.
6.How does Aetrix verify that LM4050AEX3-2.1+T is sourced from the original manufacturer or authorized distributors?
All LM4050AEX3-2.1+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 LM4050AEX3-2.1+T meets industry standards.
7.What is the process for return or replacement of LM4050AEX3-2.1+T?
All LM4050AEX3-2.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEX3-2.1+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 LM4050AEX3-2.1+T part is unused and in its original packaging.
Return procedure for LM4050AEX3-2.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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