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Analog Devices Inc./Maxim Integrated LM4050AIM3-2.5+T
- Part No.:
- LM4050AIM3-2.5+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AIM3-2.5+T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:16,495
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Product details
Overview
LM4050AIM3-2.5+T from Maxim Integrated is a precision 2.500V shunt voltage reference in SC70-3 package, featuring 0.1% initial accuracy, ±15ppm/°C temperature coefficient (max), and 60µA to 15mA operating current range. It delivers stable reverse breakdown voltage for ADC/DAC biasing, sensor excitation, and portable battery-powered instrumentation.
For engineers reviewing the LM4050AIM3-2.5+T datasheet, LM4050AIM3-2.5+T pinout, LM4050AIM3-2.5+T application, or LM4050AIM3-2.5+T equivalent, key selection criteria include guaranteed -40°C to +125°C operation, no external capacitor requirement, low 35µVRMS wideband noise (10Hz–10kHz), and compatibility with capacitive loads in space-constrained designs.
Technical Context
The LM4050AIM3-2.5+T uses a laser-trimmed bandgap architecture to maintain precise 2.500V reverse breakdown voltage across its cathode-anode terminals. Its internal pass transistor sinks variable shunt current (60µA–15mA) to regulate output under varying load and supply conditions without requiring external stabilization.
It operates as a two-terminal device with pin 3 (N.C.) floating or tied to pin 2, enabling compact layout in high-density PCBs. Guaranteed performance over -40°C to +125°C includes ≤2.5mV reverse voltage change across 1mA–15mA current range and ≤0.8Ω dynamic impedance at 1mA/120Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±2.5mV at +25°C (A-grade, 0.1% initial accuracy) |
| Temp Coefficient | ±15ppm/°C max over -40°C to +125°C - ensures <±0.3125mV drift across full range |
| Operating Current | 60µA to 15mA - supports micropower sensor nodes and higher-current analog circuits |
| Dynamic Impedance | 0.3Ω to 0.8Ω at 1mA - maintains regulation stability during fast load transients |
| Wideband Noise | 35µVRMS (10Hz–10kHz) - suitable for high-resolution 16-bit+ data converters |
| Long-Term Stability | 120ppm after 1000h - predictable aging behavior for mission-critical calibration |
Pinout & Package
LM4050AIM3-2.5+T is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is unconnected (N.C.) and must be left floating or connected to pin 2 per datasheet guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode | Reverse-biased terminal - connects to regulated voltage node; sinks shunt current |
| 2 (−) | Anode | Reference ground return - ties to system ground or low-impedance return path |
| 3 (N.C.) | No Connection | Must remain unconnected or shorted to pin 2 - not used for signal or thermal relief |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | Enables placement in <2mm² board area - ideal for wearables and IoT edge sensors |
| No output capacitor required | Eliminates BOM cost and layout risk while ensuring stability with any capacitive load up to 10µF |
| Low 35µVRMS noise | Reduces quantization error in precision 24-bit sigma-delta ADCs without additional filtering |
| Guaranteed -40°C to +125°C operation | Validated for automotive under-hood, industrial PLC, and aerospace avionics environments |
| 60µA minimum operating current | Supports ultra-low-power wake-up circuits and energy-harvesting systems with µA-level budgets |
Applications
| Portable Medical Sensors | Industrial Data Acquisition |
|---|---|
Use Scenario: Battery-powered ECG front-end with 24-bit ADC sampling at 1kSPS. IC Role / Device Role / Timing Role: Provides stable 2.500V reference for ADC VREF and op-amp biasing. Use Value: 0.1% initial accuracy and ±15ppm/°C TC ensure <±0.5 LSB error over temperature - meets IEC 60601 clinical accuracy requirements. | Use Scenario: 4–20mA loop-powered transmitter with HART modulation. IC Role / Device Role / Timing Role: Supplies precision excitation voltage for RTD/thermistor bridges and ADC reference. Use Value: Micropower 60µA start-up current enables operation below 3.3V supply with >10-year battery life in wireless field devices. |
| Automotive Cabin Controllers | Test & Measurement Equipment |
Use Scenario: HVAC control module with analog sensor inputs and CAN interface. IC Role / Device Role / Timing Role: Reference source for microcontroller ADC and analog comparators monitoring cabin air quality. Use Value: -40°C to +125°C guaranteed operation ensures reliability in dashboard-mounted units exposed to extreme ambient swings. | Use Scenario: Benchtop multimeter with auto-ranging and 6½-digit resolution. IC Role / Device Role / Timing Role: Primary voltage reference for internal DAC-based calibration and measurement scaling. Use Value: 120ppm long-term stability minimizes recalibration frequency - extends time between metrology lab certifications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431AIDBZR | 2.5V adjustable shunt reference; 0.5% initial accuracy; 100ppm/°C TC; requires external resistors for fixed output | Higher TC and lower accuracy limit use in high-precision metrology; adjustable topology adds design complexity | Select when cost sensitivity outweighs accuracy needs and board space allows resistor network |
| ADR3425ARJZ-R7 | 2.5V series reference; 0.1% accuracy; 10ppm/°C TC; 300µA quiescent current; requires input decoupling | Series architecture demands minimum input headroom (2.7V); unsuitable for low-voltage or high-side sensing | Prefer for systems with ≥3.0V supply and where ultra-low TC justifies higher IQ and larger footprint |
Compared with TLVH431AIDBZR and ADR3425ARJZ-R7, the LM4050AIM3-2.5+T offers superior micropower operation (60µA min), zero external components, and SC70 size - making it optimal for space- and energy-constrained shunt-reference applications where 2.500V fixed output is required.
Availability
LM4050AIM3-2.5+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition modules, and automotive cabin controllers requiring stable component supply with RoHS-compliant packaging and full temperature-range validation.
Supply support for LM4050AIM3-2.5+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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for demanding industrial, automotive, and medical applications.
The LM4050 series targets space-critical, high-accuracy voltage reference needs in battery-powered and thermally harsh environments - emphasizing micropower operation, small footprint, and guaranteed performance across -40°C to +125°C.
FAQ
What is the maximum shunt current rating for LM4050AIM3-2.5+T?
The absolute maximum reverse current for LM4050AIM3-2.5+T is 20mA, though functional operation is specified from 60µA to 15mA. Exceeding 15mA risks exceeding power dissipation limits in the SC70 package, especially above +70°C ambient. Derating begins at 2.17mW/°C above +70°C, limiting safe continuous operation at full 15mA above ~85°C ambient.
Does LM4050AIM3-2.5+T require an external capacitor for stability?
No, LM4050AIM3-2.5+T does not require an external output capacitor and remains stable with any capacitive load, including values up to 10µF. This eliminates BOM cost and layout constraints associated with capacitor selection, ESR, and placement - a key advantage over many series references and older shunt designs.
What is the pin configuration and N.C. pin handling requirement for LM4050AIM3-2.5+T?
LM4050AIM3-2.5+T uses a 3-pin SC70 package: Pin 1 is cathode (+), Pin 2 is anode (−), and Pin 3 is N.C. The datasheet explicitly states Pin 3 must be left floating or connected to Pin 2 - it must never be driven or used as a thermal pad. Incorrect handling can cause parametric shift or failure.
How does the temperature coefficient of LM4050AIM3-2.5+T impact system accuracy over -40°C to +125°C?
With a guaranteed ±15ppm/°C temperature coefficient, LM4050AIM3-2.5+T contributes ≤±0.3125mV (±125ppm of 2.500V) total drift across its full operating range. Combined with its 0.1% (±2.5mV) initial accuracy, total worst-case error remains within ±2.8125mV - sufficient for 12-bit systems and marginal for 14-bit designs without calibration.
Is LM4050AIM3-2.5+T compatible with lead-free reflow processes?
Yes, LM4050AIM3-2.5+T carries the '+' suffix indicating RoHS-compliant, lead-free finish. It is qualified for standard Pb-free reflow profiles with peak temperatures up to +260°C (per JEDEC J-STD-020), and its SC70 package supports both nitrogen and air reflow atmospheres without delamination or solder wettability issues.
LM4050AIM3-2.5+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- 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:
- 41µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050AIM3-2.5+T FAQ
1.How can I place an order for LM4050AIM3-2.5+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIM3-2.5+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 LM4050AIM3-2.5+T reliable?
The price and inventory of LM4050AIM3-2.5+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AIM3-2.5+T is usually 5 days.
3.What payment methods are accepted for LM4050AIM3-2.5+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIM3-2.5+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIM3-2.5+T?
LM4050AIM3-2.5+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIM3-2.5+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 LM4050AIM3-2.5+T?
For technical support, including LM4050AIM3-2.5+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIM3-2.5+T requirements.
6.How does Aetrix verify that LM4050AIM3-2.5+T is sourced from the original manufacturer or authorized distributors?
All LM4050AIM3-2.5+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 LM4050AIM3-2.5+T meets industry standards.
7.What is the process for return or replacement of LM4050AIM3-2.5+T?
All LM4050AIM3-2.5+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIM3-2.5+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 LM4050AIM3-2.5+T part is unused and in its original packaging.
Return procedure for LM4050AIM3-2.5+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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