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Analog Devices Inc./Maxim Integrated LM4050AEM3-2.1+T
- Part No.:
- LM4050AEM3-2.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AEM3-2.1+T.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,542
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Product details
Overview
LM4050AEM3-2.1+T from Analog Devices is a precision 2.048V, 0.1% initial accuracy, 50ppm/°C temperature coefficient shunt voltage reference in a 3-pin SOT23 package. It operates over -40°C to +125°C with 60µA–15mA shunt current capability and 28µVRMS wideband noise (10Hz–10kHz), enabling stable reference generation in space-constrained battery-powered systems.
For engineers reviewing the LM4050AEM3-2.1+T datasheet, LM4050AEM3-2.1+T pinout, LM4050AEM3-2.1+T application, or LM4050AEM3-2.1+T equivalent, key selection criteria include guaranteed initial tolerance, low dynamic impedance (0.3–0.8Ω), no external capacitor requirement, AEC-Q100 qualification for automotive use, and compatibility with high-temperature industrial environments.
Technical Context
The LM4050AEM3-2.1+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–15mA of reverse current. Its internal pass transistor sinks variable current to regulate output voltage against load and supply variations.
It exhibits ±15ppm/°C typical temperature coefficient over full operating range and delivers stable performance with any capacitive load-no external stabilization capacitor required. The device clamps to ~0.7V below ground under forward bias up to 10mA, supporting bidirectional protection in mixed-signal circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V nominal at +25°C; guaranteed 2.0460V–2.0500V (A-grade) for high-precision ADC/DAC biasing |
| Initial Accuracy | ±0.1% (±2.0mV max) - enables single-point calibration in portable instrumentation |
| Tempco | 50ppm/°C max over –40°C to +125°C - ensures ≤±10.2mV drift across full industrial range |
| Shunt Current Range | 60µA to 15mA - supports ultra-low-power sensor nodes and high-current reference buffering |
| Dynamic Impedance | 0.3Ω to 0.8Ω at 1mA - minimizes load-induced voltage error in precision feedback loops |
| Wideband Noise | 28µVRMS (10Hz–10kHz) - suitable for 16-bit SAR ADC references without additional filtering |
| Long-Term Stability | 120ppm after 1000 hours - ensures reference integrity in unattended industrial monitoring |
Pinout & Package
LM4050AEM3-2.1+T uses a 3-pin SOT23 surface-mount package (1.8mm × 2.9mm footprint), rated for operation from –40°C to +125°C with 238.1mW power dissipation at +70°C (derated 3mW/°C above).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Positive terminal (anode) | Connected to system ground or low-impedance return path; forms reference node with Pin 2 |
| 2 (–) | Negative terminal (cathode) | Reference output node; voltage regulated at 2.048V relative to Pin 1; connects to RS and load |
| 3 (N.C.) | No connection | Must be left unconnected or tied to Pin 2; not internally bonded - avoids parasitic leakage paths |
Key Features
| Feature | Design Value |
|---|---|
| 0.1% initial accuracy | Reduces or eliminates system-level trimming in factory calibration for medical sensors and data loggers |
| 50ppm/°C tempco guarantee | Ensures predictable, bounded error across automotive under-hood and industrial control environments |
| No output capacitor required | Eliminates BOM cost and board area for stability components in compact wearable designs |
| Tolerates any capacitive load | Enables direct connection to ADC input caps or long PCB traces without oscillation risk |
| AEC-Q100 qualified | Validated for automotive applications including body electronics and ADAS sensor interfaces |
Applications
| Portable Medical Sensors | Automotive Cabin Controllers |
|---|---|
|
Use Scenario: Battery-powered glucose meter with 16-bit ADC measuring electrochemical current. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048V reference for ratiometric ADC conversion. Use Value: 0.1% initial accuracy and 28µVRMS noise enable <1 LSB error at 16-bit resolution without post-calibration. |
Use Scenario: HVAC control module in vehicle cabin requiring reliable temperature sensing over –40°C to +85°C. IC Role / Device Role / Timing Role: Precision voltage reference for thermistor-to-digital signal chain in microcontroller ADC subsystem. Use Value: AEC-Q100 qualification and 50ppm/°C tempco ensure consistent measurement accuracy across automotive thermal cycles. |
| Industrial Data Acquisition | Smart Energy Meters |
|
Use Scenario: DIN-rail mounted PLC analog input module digitizing 4–20mA loop signals. IC Role / Device Role / Timing Role: Primary shunt reference for isolated sigma-delta ADC front-end with galvanic separation. Use Value: 60µA minimum operating current allows operation from low-quiescent isolated supplies; long-term stability reduces field recalibration frequency. |
Use Scenario: Revenue-grade electricity meter requiring metrology-grade voltage reference for energy calculation. IC Role / Device Role / Timing Role: Stable 2.048V reference for polyphase energy measurement IC (e.g., ADE7953) ADC core. Use Value: Laser-trimmed resistors and 120ppm/1000h stability meet IEC 62053-21 Class 0.2 accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040A20IDBZR | 2.048V, 0.1%, SOT23, but 100ppm/°C max tempco vs. 50ppm/°C for LM4050AEM3-2.1+T | Lower tempco makes LM4050AEM3-2.1+T preferred for extended temperature industrial use | Select LM4050AEM3-2.1+T when ±0.6% total error budget over –40°C to +125°C is required |
| REF3020AIDBZR | 2.048V, 0.2%, SC70, 50ppm/°C, but 50µA min operating current vs. 60µA for LM4050AEM3-2.1+T | REF3020AIDBZR offers lower quiescent current; LM4050AEM3-2.1+T provides tighter initial accuracy | Choose LM4050AEM3-2.1+T for highest initial precision; REF3020AIDBZR where ultra-low current dominates |
Compared with LM4040A20IDBZR and REF3020AIDBZR, LM4050AEM3-2.1+T uniquely combines 0.1% initial accuracy, 50ppm/°C tempco, and AEC-Q100 qualification in a single SOT23 package-making it optimal for automotive and high-reliability industrial reference designs where both precision and environmental robustness are critical.
Availability
LM4050AEM3-2.1+T is available at Aetrix Electronics and suitable for portable medical sensors, automotive cabin controllers, and industrial data acquisition systems requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LM4050AEM3-2.1+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 since 1965.
The LM4050/LM4051 series was designed specifically for space-constrained, high-accuracy shunt reference applications demanding low noise, wide operating current range, and guaranteed temperature stability across harsh environments.
FAQ
What is the exact output voltage tolerance of LM4050AEM3-2.1+T at +25°C?
The LM4050AEM3-2.1+T guarantees a reverse breakdown voltage of 2.0460V to 2.0500V at +25°C, corresponding to ±0.1% (±2.0mV) initial accuracy. This tight tolerance is achieved via laser trimming and is validated across 100% of production units at room temperature before shipment.
Does LM4050AEM3-2.1+T require an external capacitor for stability?
No, LM4050AEM3-2.1+T does not require an external capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including direct connection to ADC input capacitors or long PCB traces - eliminating BOM cost and layout constraints.
What is the minimum shunt current needed for regulation in LM4050AEM3-2.1+T?
The LM4050AEM3-2.1+T requires a minimum shunt current of 60µA to maintain regulation across its full temperature range (–40°C to +125°C). Below this threshold, output voltage may deviate beyond specified tolerance; design must ensure ISHUNT ≥ 60µA under worst-case conditions.
Is LM4050AEM3-2.1+T qualified for automotive applications?
Yes, LM4050AEM3-2.1+T is AEC-Q100 qualified for automotive applications. It meets stress test requirements for temperature cycling, humidity, and mechanical shock, and is rated for operation from –40°C to +125°C - suitable for cabin, chassis, and ADAS subsystems.
How does LM4050AEM3-2.1+T compare to LM4050BEM3-2.1+T in terms of accuracy?
LM4050AEM3-2.1+T offers ±0.1% initial accuracy versus ±0.2% for LM4050BEM3-2.1+T. At 2.048V, this translates to ±2.0mV vs. ±4.0mV maximum deviation at +25°C. Both share identical 50ppm/°C tempco, package, and operating current range - the A-grade provides tighter factory calibration.
LM4050AEM3-2.1+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- SOT-23-3
LM4050AEM3-2.1+T FAQ
1.How can I place an order for LM4050AEM3-2.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEM3-2.1+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 LM4050AEM3-2.1+T reliable?
The price and inventory of LM4050AEM3-2.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AEM3-2.1+T is usually 5 days.
3.What payment methods are accepted for LM4050AEM3-2.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEM3-2.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEM3-2.1+T?
LM4050AEM3-2.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEM3-2.1+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 LM4050AEM3-2.1+T?
For technical support, including LM4050AEM3-2.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEM3-2.1+T requirements.
6.How does Aetrix verify that LM4050AEM3-2.1+T is sourced from the original manufacturer or authorized distributors?
All LM4050AEM3-2.1+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 LM4050AEM3-2.1+T meets industry standards.
7.What is the process for return or replacement of LM4050AEM3-2.1+T?
All LM4050AEM3-2.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEM3-2.1+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 LM4050AEM3-2.1+T part is unused and in its original packaging.
Return procedure for LM4050AEM3-2.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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