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Analog Devices Inc./Maxim Integrated LM4050AEM3-2.5/V+T
- Part No.:
- LM4050AEM3-2.5/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AEM3-2.5/V+T.pdf
- Description:
- IC VREF SHUNT 2.048V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,307
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Product details
Overview
LM4050AEM3-2.5/V+T from Analog Devices is a precision 2.500 V, 0.1% initial accuracy, 50 ppm/°C max temperature coefficient shunt voltage reference in a 3-pin SOT23 package. It operates over -40°C to +125°C with 60 µA to 15 mA shunt current capability, low 28 µVRMS noise (10 Hz–10 kHz), and no external capacitor requirement-ideal for high-accuracy ADC/DAC biasing in automotive sensor modules.
For engineers reviewing the LM4050AEM3-2.5/V+T datasheet, LM4050AEM3-2.5/V+T pinout, LM4050AEM3-2.5/V+T application, or LM4050AEM3-2.5/V+T equivalent, key selection criteria include guaranteed AEC-Q100 qualification, ±2.5 mV reverse breakdown voltage tolerance at +25°C, stable regulation under capacitive loads, and compatibility with micropower systems requiring <100 µA minimum operating current.
Technical Context
The LM4050AEM3-2.5/V+T implements a laser-trimmed bandgap shunt architecture that maintains a precise 2.500 V reverse breakdown voltage across its anode-cathode terminals. Its internal pass transistor sinks variable current to hold output voltage constant despite supply or load variations, eliminating need for series regulators or op-amp buffers.
It guarantees operation over full industrial-automotive temperature range (-40°C to +125°C) with dynamic impedance ≤0.8 Ω at 1 mA, long-term stability of 120 ppm over 1000 hours, and immunity to output capacitance-enabling direct connection to SAR ADC reference inputs or precision current-sense amplifier feedback nodes without stability concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal at +25°C; ±2.5 mV (0.1%) tolerance ensures ≤0.1% full-scale error in 12-bit ADC references. |
| Initial Accuracy | 0.1% max (Grade A); enables single-point calibration in factory programming without trimming resistors. |
| Tempco | 50 ppm/°C max over -40°C to +125°C; contributes ≤1.25 mV drift across full range-critical for battery-powered instrumentation. |
| Shunt Current Range | 60 µA to 15 mA; supports ultra-low-power sensor nodes (e.g., 60 µA × 2.5 V = 150 µW dissipation) and higher-current analog front-ends. |
| Wideband Noise | 28 µVRMS (10 Hz–10 kHz); limits quantization noise floor in 16-bit delta-sigma ADCs when used as reference source. |
| Dynamic Impedance | ≤0.8 Ω at 1 mA; minimizes voltage perturbation during fast load transients in closed-loop current sources. |
| AEC-Q100 Grade | Qualified per /V suffix; certified for automotive applications including engine control units and ADAS sensor interfaces. |
Pinout & Package
Package: 3-pin SOT23 (1.7 mm × 2.9 mm × 1.3 mm), RoHS-compliant, thermal resistance θJA = 336°C/W on four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode (positive terminal) | Connect to system ground or low-impedance return path; serves as reference potential node for downstream circuitry. |
| 2 (–) | Cathode (negative terminal) | Connect to regulated voltage node (e.g., ADC VREF+); sinks shunt current to maintain 2.500 V across terminals. |
| 3 (N.C.) | No Connection | Must be left unconnected or tied to Pin 2; not internally bonded-floating connection avoids parasitic leakage paths. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-stable shunt reference | Guaranteed 2.500 V ±2.5 mV at +25°C and ±0.6% over full temperature range-enables high-fidelity signal chain calibration. |
| Capacitor-free stability | No external capacitor required; remains stable with any output capacitance up to 10 µF-reduces BOM count and PCB area in space-constrained modules. |
| Micropower operation | 60 µA minimum operating current allows use in always-on wake-up circuits with <1 µA total system standby current. |
| AEC-Q100 qualified | /V suffix confirms qualification for automotive Grade 1 (-40°C to +125°C) applications-validates reliability for under-hood electronics. |
| Low output noise | 28 µVRMS wideband noise enables ≤1 LSB error in 16-bit converters without additional filtering or buffering stages. |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
|
Use Scenario: High-accuracy temperature and pressure sensing in HVAC control modules with CAN bus reporting. IC Role / Device Role / Timing Role: Provides stable 2.500 V reference for 12-bit SAR ADC sampling thermistor and piezoresistive bridge outputs. Use Value: 0.1% initial accuracy and 50 ppm/°C tempco ensure <±0.5°C measurement error across cabin temperature range (-40°C to +85°C). |
Use Scenario: Battery-powered ECG front-end with low-noise instrumentation amplifiers and 16-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Supplies clean, low-drift reference voltage to ADC's VREF+ input and IAs' gain-setting resistors. Use Value: 28 µVRMS noise and capacitor-free operation eliminate noise coupling paths, preserving >90 dB SNR in sub-µV biopotential signals. |
| Industrial Process Transmitters | Smart Energy Meters |
|
Use Scenario: 4–20 mA loop-powered field transmitter measuring flow rate via differential pressure sensor. IC Role / Device Role / Timing Role: Sets precision reference for DAC generating loop current and for sensor excitation voltage. Use Value: 60 µA–15 mA shunt current range accommodates varying loop power budgets while maintaining 2.500 V regulation within ±0.1%. |
Use Scenario: Revenue-grade electricity meter with polyphase energy measurement IC and isolated communication interface. IC Role / Device Role / Timing Role: Supplies reference to metrology ADCs performing simultaneous voltage/current sampling at 8 kSPS. Use Value: AEC-Q100 qualification and 120 ppm long-term stability support 10-year metrology certification without 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 |
|---|---|---|---|
| LM4040C25IDBZR | 2.5 V, 0.5% initial accuracy, 100 ppm/°C tempco, SOT23 package; no AEC-Q100 qualification. | Lower accuracy and higher drift limit use in non-automotive consumer IoT devices only. | Select when cost sensitivity outweighs automotive compliance and precision requirements. |
| ADR3425ARJZ-R7 | 2.5 V, 0.1% initial accuracy, 10 ppm/°C max tempco, SC70 package; higher precision but requires 100 µA min current. | Better stability for lab-grade instruments; SC70 footprint differs from SOT23-PCB redesign needed. | Choose for metrology-grade designs where 10 ppm/°C drift is mandatory and layout flexibility exists. |
Compared with LM4050AEM3-2.5/V+T, LM4040C25IDBZR trades AEC-Q100 compliance and tighter accuracy for lower cost, while ADR3425ARJZ-R7 delivers superior temperature stability in a smaller SC70 package but demands higher minimum current and new layout-making LM4050AEM3-2.5/V+T optimal for automotive-qualified, SOT23-based designs balancing precision, power, and qualification.
Availability
LM4050AEM3-2.5/V+T is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, industrial process transmitters, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4050AEM3-2.5/V+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 voltage reference needs in automotive and industrial systems-emphasizing AEC-Q100 qualification, micropower operation, and capacitor-free stability.
FAQ
What is the guaranteed reverse breakdown voltage tolerance for LM4050AEM3-2.5/V+T at +25°C?
The LM4050AEM3-2.5/V+T has a guaranteed reverse breakdown voltage of 2.500 V ±2.5 mV (0.1%) at +25°C, as specified in the Electrical Characteristics table for Grade A devices. This tight tolerance ensures minimal full-scale error in precision data acquisition systems using the LM4050AEM3-2.5/V+T as a reference source.
Does LM4050AEM3-2.5/V+T require an external output capacitor for stability?
No, the LM4050AEM3-2.5/V+T does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including values up to 10 µF. This eliminates BOM components and simplifies layout-especially valuable in compact automotive and portable designs where the LM4050AEM3-2.5/V+T is commonly deployed.
Is LM4050AEM3-2.5/V+T qualified for automotive applications?
Yes, the /V suffix in LM4050AEM3-2.5/V+T explicitly denotes AEC-Q100 qualification for automotive Grade 1 operation (-40°C to +125°C). This certification validates reliability for under-hood and cabin applications, including engine control, ADAS sensors, and infotainment power management where the LM4050AEM3-2.5/V+T serves as a trusted reference.
What is the minimum shunt current required for proper regulation of LM4050AEM3-2.5/V+T?
The LM4050AEM3-2.5/V+T requires a minimum shunt current of 60 µA to maintain regulation across its full temperature range. Below this threshold, output voltage may deviate beyond specifications. Designers must ensure the source resistor and supply voltage combination sustains ≥60 µA shunt current even under worst-case conditions-e.g., lowest VS and highest ILOAD-when applying the LM4050AEM3-2.5/V+T.
How does the temperature coefficient of LM4050AEM3-2.5/V+T impact system accuracy over -40°C to +125°C?
The LM4050AEM3-2.5/V+T has a maximum temperature coefficient of 50 ppm/°C, contributing up to ±1.25 mV drift (0.05% of 2.5 V) across its full operating range. Combined with its 0.1% initial accuracy, total error remains within ±0.6% over temperature-meeting stringent requirements for automotive and industrial instrumentation where the LM4050AEM3-2.5/V+T is specified.
LM4050AEM3-2.5/V+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
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050AEM3-2.5/V+T FAQ
1.How can I place an order for LM4050AEM3-2.5/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEM3-2.5/V+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/V+T reliable?
The price and inventory of LM4050AEM3-2.5/V+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/V+T is usually 5 days.
3.What payment methods are accepted for LM4050AEM3-2.5/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEM3-2.5/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEM3-2.5/V+T?
LM4050AEM3-2.5/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEM3-2.5/V+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/V+T?
For technical support, including LM4050AEM3-2.5/V+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/V+T requirements.
6.How does Aetrix verify that LM4050AEM3-2.5/V+T is sourced from the original manufacturer or authorized distributors?
All LM4050AEM3-2.5/V+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/V+T meets industry standards.
7.What is the process for return or replacement of LM4050AEM3-2.5/V+T?
All LM4050AEM3-2.5/V+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEM3-2.5/V+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/V+T part is unused and in its original packaging.
Return procedure for LM4050AEM3-2.5/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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