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Analog Devices Inc./Maxim Integrated LM4050AEM3-2.5+T
- Part No.:
- LM4050AEM3-2.5+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AEM3-2.5+T.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM4050AEM3-2.5+T from Analog Devices is a precision 2.500V, 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, low 35µVRMS noise (10Hz–10kHz), and no external capacitor requirement-ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4050AEM3-2.5+T datasheet, LM4050AEM3-2.5+T pinout, LM4050AEM3-2.5+T application, or LM4050AEM3-2.5+T equivalent, key selection criteria include guaranteed 0.1% initial tolerance at +25°C, ±2.5mV max deviation over full temperature range, stable operation with capacitive loads, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The LM4050AEM3-2.5+T implements a laser-trimmed bandgap core with two-terminal shunt topology, delivering fixed 2.500V reverse breakdown voltage without series pass elements. Its internal architecture maintains regulation by sinking variable current through an external series resistor while holding cathode-to-anode voltage constant across load and supply variations.
It guarantees ±20ppm/°C tempco at 10mA operating current and ±15ppm/°C at 100µA, with dynamic impedance as low as 0.3Ω (1mA, 120Hz). The device tolerates any output capacitance and exhibits 120ppm long-term stability after 1000 hours-enabling use in unbuffered precision sensor signal chains and battery-powered data loggers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±2.5mV at +25°C; ensures direct compatibility with 2.5V ADC reference inputs and rail-to-rail op-amp biasing. |
| Initial Accuracy | 0.1% (±2.5mV) at +25°C; eliminates need for system-level calibration in medical sensor front-ends. |
| Tempco | 50ppm/°C max over –40°C to +125°C; contributes ≤±12.5mV drift across full industrial temperature range. |
| Shunt Current Range | 60µA to 15mA; supports ultra-low-power IoT nodes (e.g., 60µA sleep mode) and 12-bit SAR ADCs requiring 10mA drive. |
| Wideband Noise | 35µVRMS (10Hz–10kHz); enables <16-bit ENOB in precision 24-bit delta-sigma ADC systems without additional filtering. |
| Dynamic Impedance | 0.3Ω typical at 1mA; minimizes output voltage shift under fast load transients in closed-loop DAC feedback paths. |
| Long-Term Stability | 120ppm (1000h); corresponds to <±0.3mV drift over 1 year-critical for unattended environmental monitoring equipment. |
Pinout & Package
LM4050AEM3-2.5+T uses a 3-pin SOT23 surface-mount package (1.7mm × 2.9mm × 1.3mm), compatible with standard reflow profiles and offering 336°C/W junction-to-ambient thermal resistance on a four-layer PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode (positive terminal) | Connects to system ground or low-impedance return path; serves as reference potential node for all downstream circuitry. |
| 2 (–) | Cathode (negative terminal) | Carries regulated 2.500V output; sinks shunt current from external series resistor and supplies load current to connected ICs. |
| 3 (N.C.) | No connection | Must be left floating or tied to pin 2; not internally bonded-ensures mechanical robustness without electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed bandgap core | Delivers 0.1% initial accuracy without post-package calibration-reducing test time and BOM cost in high-volume production. |
| Capacitor-free stability | Operates stably with any output capacitance (0–10µF), eliminating external compensation components in space-constrained wearables. |
| AEC-Q100 qualified | Validated for automotive applications per Grade 1 (–40°C to +125°C), enabling use in engine control unit (ECU) sensor interfaces. |
| Ultra-low micropower operation | Minimum 60µA shunt current allows integration into coin-cell-powered devices with >10-year battery life. |
| Low 35µVRMS noise | Enables direct coupling to precision 24-bit sigma-delta ADCs without noise-amplifying buffers or RC filters. |
Applications
| Portable Medical Sensors | Automotive Cabin Sensors |
|---|---|
Use Scenario: Battery-powered pulse oximeter measuring SpO₂ via dual-wavelength photodiode signals. IC Role / Device Role / Timing Role: Provides stable 2.500V reference for 24-bit delta-sigma ADC converting analog photodiode currents. Use Value: 0.1% initial accuracy and 50ppm/°C tempco ensure <±0.5% measurement error across body temperature and ambient conditions. | Use Scenario: Occupancy detection using infrared thermopile array in vehicle cabin climate control. IC Role / Device Role / Timing Role: Supplies precision bias voltage to thermopile amplifier stage and ADC reference input. Use Value: AEC-Q100 qualification and –40°C to +125°C operation guarantee reliable performance during cold-soak and hot-soak vehicle testing. |
| Industrial Data Loggers | Smart Energy Meters |
Use Scenario: Remote environmental monitor logging temperature, humidity, and air quality over 10-year deployment. IC Role / Device Role / Timing Role: References 16-bit SAR ADC sampling analog sensor outputs in low-duty-cycle sleep mode. Use Value: 60µA minimum shunt current enables microamp-level system sleep current, extending lithium-thionyl chloride battery life beyond 10 years. | Use Scenario: Revenue-grade electricity meter measuring voltage and current waveforms with metrology-grade accuracy. IC Role / Device Role / Timing Role: Supplies 2.500V reference to isolated ADCs digitizing mains voltage and CT/PT secondary signals. Use Value: 120ppm long-term stability ensures <0.01% gain drift over 10-year utility certification period without field recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040A25IDBZR | 0.1% initial accuracy, 2.5V, SOT23-3, but 100ppm/°C max tempco vs. LM4050AEM3-2.5+T's 50ppm/°C. | Less suitable for wide-temperature industrial environments where ±12.5mV drift is unacceptable. | Select LM4040A25IDBZR only if cost sensitivity outweighs tempco requirements and AEC-Q100 is not needed. |
| ADR3425ARJZ-R7 | 0.1% initial accuracy, 2.5V, SOT23-5, 10ppm/°C max tempco, but requires 100µA min current and has higher 12µVRMS noise. | Better for ultra-stable lab equipment; unsuitable for micropower designs needing <100µA operation. | Choose ADR3425ARJZ-R7 when sub-10ppm/°C drift is mandatory and system can support higher quiescent current. |
Compared with LM4040A25IDBZR and ADR3425ARJZ-R7, LM4050AEM3-2.5+T uniquely balances 0.1% accuracy, 50ppm/°C tempco, 60µA minimum current, AEC-Q100 qualification, and capacitor-free stability-making it optimal for automotive and industrial battery-powered precision analog systems.
Availability
LM4050AEM3-2.5+T is available at Aetrix Electronics and suitable for portable medical sensors, automotive cabin sensors, industrial data loggers, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4050AEM3-2.5+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 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 family was designed specifically for space-constrained, high-accuracy shunt reference applications demanding micropower operation, wide temperature range support, and AEC-Q100 compliance-targeting sensor signal conditioning and metrology-grade data acquisition.
FAQ
What is the guaranteed initial accuracy of LM4050AEM3-2.5+T at +25°C?
The LM4050AEM3-2.5+T guarantees ±0.1% initial accuracy at +25°C, corresponding to ±2.5mV tolerance around its nominal 2.500V output. This specification is laser-trimmed and 100% production tested per Analog Devices' datasheet, ensuring consistent performance without system-level trimming. The LM4050AEM3-2.5+T achieves this accuracy in its SOT23 package with no external components required.
Does LM4050AEM3-2.5+T require an external output capacitor for stability?
No, LM4050AEM3-2.5+T does not require an external output capacitor for stability-it is inherently stable with any capacitive load from 0 to 10µF. This eliminates BOM cost and board area in compact designs like wearable health monitors. The LM4050AEM3-2.5+T achieves this via internal compensation and low dynamic impedance (0.3Ω typical), verified across temperature and current ranges in the official Analog Devices datasheet.
What is the minimum shunt current required for proper regulation of LM4050AEM3-2.5+T?
The LM4050AEM3-2.5+T requires a minimum shunt current of 60µA to maintain regulation across its full –40°C to +125°C operating range. This value is specified in the Electrical Characteristics table for the 2.500V variant and enables ultra-low-power operation in battery-backed systems. Below 60µA, output voltage may deviate beyond guaranteed limits; the LM4050AEM3-2.5+T must always be biased above this threshold in the final design.
Is LM4050AEM3-2.5+T qualified for automotive applications?
Yes, LM4050AEM3-2.5+T is AEC-Q100 qualified for automotive applications, specifically meeting Grade 1 requirements (–40°C to +125°C ambient). This qualification is explicitly stated in the Features section and Ordering Information of the Analog Devices datasheet. The LM4050AEM3-2.5+T is therefore approved for use in non-safety-critical automotive subsystems such as cabin occupancy sensors, infotainment power management, and body control modules.
What is the wideband noise performance of LM4050AEM3-2.5+T?
The LM4050AEM3-2.5+T delivers 35µVRMS wideband noise over the 10Hz to 10kHz frequency range at 100µA operating current. This low-noise characteristic is critical for high-resolution data acquisition systems, enabling direct interface with 24-bit delta-sigma ADCs without additional noise-filtering circuitry. The LM4050AEM3-2.5+T achieves this performance through optimized bandgap core design and internal filtering, as confirmed in the Electrical Characteristics table on page 4 of the datasheet.
LM4050AEM3-2.5+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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- 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:
- SOT-23-3
LM4050AEM3-2.5+T FAQ
1.How can I place an order for LM4050AEM3-2.5+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEM3-2.5+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 LM4050AEM3-2.5+T reliable?
The price and inventory of LM4050AEM3-2.5+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AEM3-2.5+T is usually 5 days.
3.What payment methods are accepted for LM4050AEM3-2.5+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEM3-2.5+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEM3-2.5+T?
LM4050AEM3-2.5+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEM3-2.5+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 LM4050AEM3-2.5+T?
For technical support, including LM4050AEM3-2.5+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEM3-2.5+T requirements.
6.How does Aetrix verify that LM4050AEM3-2.5+T is sourced from the original manufacturer or authorized distributors?
All LM4050AEM3-2.5+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 LM4050AEM3-2.5+T meets industry standards.
7.What is the process for return or replacement of LM4050AEM3-2.5+T?
All LM4050AEM3-2.5+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEM3-2.5+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 LM4050AEM3-2.5+T part is unused and in its original packaging.
Return procedure for LM4050AEM3-2.5+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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