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Analog Devices Inc./Maxim Integrated LM4050AEM3-4.1+T
- Part No.:
- LM4050AEM3-4.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AEM3-4.1+T.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,380
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Product details
Overview
LM4050AEM3-4.1+T from Analog Devices is a precision 4.096V, 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 64µVRMS wideband noise (10Hz–10kHz), enabling high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4050AEM3-4.1+T datasheet, LM4050AEM3-4.1+T pinout, LM4050AEM3-4.1+T application, or LM4050AEM3-4.1+T equivalent, key selection criteria include guaranteed 0.1% initial tolerance at +25°C, ±4.1mV max total voltage error over full temperature range, no external capacitor requirement, and AEC-Q100 qualification for automotive use cases.
Technical Context
The LM4050AEM3-4.1+T implements a laser-trimmed bandgap shunt architecture delivering stable reverse breakdown voltage without series pass elements. Its internal structure sinks precise current to maintain 4.096V across terminals under varying load and supply conditions.
It achieves ±15ppm/°C typical TC over -40°C to +125°C with guaranteed ≤50ppm/°C max, supports capacitive loads up to 1µF without oscillation, and exhibits 0.5Ω typical dynamic impedance at 1mA shunt current-critical for low-noise data acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; ±4.1mV max initial tolerance at +25°C ensures direct compatibility with 12-bit ADC references. |
| Temperature Coefficient | ≤50ppm/°C max over -40°C to +125°C; guarantees ≤±0.6% total voltage drift across full operating range. |
| Shunt Current Range | 60µA to 15mA; enables operation from ultra-low-power sensor nodes to higher-current analog front-ends. |
| Wideband Noise | 64µVRMS (10Hz–10kHz); supports high-resolution measurement systems requiring sub-LSB stability. |
| Dynamic Impedance | 0.5Ω typical at 1mA; minimizes output voltage shift during transient load changes in precision circuits. |
| Long-Term Stability | 120ppm after 1000 hours; ensures reference integrity in mission-critical industrial control applications. |
Pinout & Package
Package: 3-pin SOT23 (1.7mm × 2.9mm × 1.3mm), RoHS-compliant, thermal resistance θJA = 336°C/W on four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode / Positive Terminal | Connects to system ground or low-impedance return path; reverse-biased configuration requires current sourcing into this pin. |
| 2 (-) | Cathode / Negative Terminal | Output node where regulated 4.096V appears relative to pin 1; connects to load and current-setting resistor. |
| 3 (N.C.) | No Connection | Must be left unconnected or tied to pin 2; floating or misconnected pin 3 causes undefined behavior or device damage. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed resistor network | Enables 0.1% initial accuracy without external calibration, reducing BOM count and test time. |
| No output capacitor required | Eliminates need for stabilization capacitor, saving PCB area and avoiding capacitor aging effects on long-term drift. |
| Capacitive load tolerance | Stable with any output capacitance up to 1µF, simplifying interface with ADC sample-and-hold inputs. |
| AEC-Q100 qualified | Validated for automotive applications including engine control units and ADAS sensor modules per Grade 1 requirements. |
| Ultra-low quiescent current | 60µA minimum operating current enables use in battery-powered devices with multi-year shelf life. |
Applications
| Portable Instrumentation | Automotive Sensor Interface |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC requiring stable 4.096V reference for full-scale range. IC Role / Device Role / Timing Role: Shunt voltage reference providing precision bias to ADC reference input and analog front-end gain stages. Use Value: 0.1% initial accuracy and 50ppm/°C TC ensure <0.02% measurement error across operating temperature, meeting Class II meter specifications. | Use Scenario: Tire pressure monitoring system (TPMS) ECU measuring piezoresistive sensor bridge output. IC Role / Device Role / Timing Role: Reference source for ratiometric ADC conversion of bridge differential voltage. Use Value: AEC-Q100 qualification and -40°C to +125°C operation guarantee reliability in under-hood environments with minimal calibration drift. |
| Industrial Data Acquisition | Medical Vital Sign Monitor |
Use Scenario: Modular PLC analog input module digitizing 4–20mA loop signals with 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Primary reference for ADC and secondary reference for programmable gain amplifier offset trimming. Use Value: 64µVRMS noise and 0.5Ω dynamic impedance prevent noise coupling and maintain ENOB >21 bits at 10SPS. | Use Scenario: Portable ECG monitor digitizing amplified biopotential signals using low-noise instrumentation amplifier and 12-bit ADC. IC Role / Device Role / Timing Role: Stable excitation reference for right-leg drive circuit and ADC reference voltage source. Use Value: No external capacitor requirement eliminates risk of electrolytic aging in medical-grade long-life designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIM3-4.1+T | 0.5% initial accuracy, 100ppm/°C max TC, same SOT23 package and 4.096V output. | Lower accuracy and higher TC limit use to non-critical biasing; not AEC-Q100 qualified. | Select when cost sensitivity outweighs precision and automotive compliance requirements. |
| REF3040AIDBZR | 4.096V, 0.2% initial accuracy, 50ppm/°C TC, but series topology with 50µA max quiescent current. | Series architecture requires minimum load current; incompatible with shunt-based current-sinking designs. | Choose only if system topology mandates series reference and lower dropout is needed. |
Compared with LM4040CIM3-4.1+T and REF3040AIDBZR, the LM4050AEM3-4.1+T uniquely combines 0.1% accuracy, AEC-Q100 qualification, and true shunt operation-making it the sole option for high-reliability, space-constrained, current-sinking reference applications demanding <±0.6% total error.
Availability
LM4050AEM3-4.1+T is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor interfaces, and industrial data acquisition requiring stable component supply with guaranteed long-term availability.
Supply support for LM4050AEM3-4.1+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.
The LM4050/LM4051 product line delivers precision shunt voltage references optimized for space-constrained, high-accuracy applications where micropower operation and temperature stability are critical-especially in battery-powered and automotive systems.
FAQ
What is the guaranteed initial accuracy of the LM4050AEM3-4.1+T at +25°C?
The LM4050AEM3-4.1+T is guaranteed to deliver ±0.1% initial accuracy at +25°C, corresponding to ±4.1mV tolerance around its nominal 4.096V output voltage. This specification is laser-trimmed and 100% production tested, ensuring consistent performance without post-manufacture calibration. The LM4050AEM3-4.1+T meets this accuracy grade across all units shipped.
Does the LM4050AEM3-4.1+T require an external output capacitor for stability?
No, the LM4050AEM3-4.1+T does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including 0–1µF. This eliminates capacitor-related aging, leakage, and board space concerns-making the LM4050AEM3-4.1+T ideal for compact, long-life designs where reliability is paramount.
What is the minimum and maximum shunt current range for reliable regulation of the LM4050AEM3-4.1+T?
The LM4050AEM3-4.1+T maintains stable regulation across a shunt current range of 60µA to 15mA. Operation below 60µA risks loss of regulation; exceeding 15mA may cause thermal stress or exceed safe operating area limits. Absolute maximum reverse current is 20mA, but sustained operation above 15mA is not recommended. The LM4050AEM3-4.1+T is designed for optimal performance within the 60µA–15mA window.
Is the LM4050AEM3-4.1+T qualified for automotive applications?
Yes, the LM4050AEM3-4.1+T is AEC-Q100 qualified for automotive applications. It is rated for operation from -40°C to +125°C and meets stress testing requirements for temperature cycling, humidity, and mechanical shock. This qualification makes the LM4050AEM3-4.1+T suitable for under-hood and cabin ECUs, including TPMS, body control modules, and ADAS sensor signal conditioning.
How does the LM4050AEM3-4.1+T handle temperature-induced voltage drift?
The LM4050AEM3-4.1+T guarantees a maximum temperature coefficient of 50ppm/°C over -40°C to +125°C. Combined with its 0.1% initial accuracy, this results in ≤±0.6% total voltage error across the full temperature range. Its bandgap architecture provides predictable, monotonic drift-enabling accurate system-level compensation if needed. The LM4050AEM3-4.1+T's TC is verified per JEDEC JESD22-A119 standards.
LM4050AEM3-4.1+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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 64µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050AEM3-4.1+T FAQ
1.How can I place an order for LM4050AEM3-4.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEM3-4.1+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 LM4050AEM3-4.1+T reliable?
The price and inventory of LM4050AEM3-4.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AEM3-4.1+T is usually 5 days.
3.What payment methods are accepted for LM4050AEM3-4.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEM3-4.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEM3-4.1+T?
LM4050AEM3-4.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEM3-4.1+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 LM4050AEM3-4.1+T?
For technical support, including LM4050AEM3-4.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEM3-4.1+T requirements.
6.How does Aetrix verify that LM4050AEM3-4.1+T is sourced from the original manufacturer or authorized distributors?
All LM4050AEM3-4.1+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 LM4050AEM3-4.1+T meets industry standards.
7.What is the process for return or replacement of LM4050AEM3-4.1+T?
All LM4050AEM3-4.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEM3-4.1+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 LM4050AEM3-4.1+T part is unused and in its original packaging.
Return procedure for LM4050AEM3-4.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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