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Analog Devices Inc./Maxim Integrated LM4050AIM3-2.5+
- Part No.:
- LM4050AIM3-2.5+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AIM3-2.5+.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:1,405
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Product details
Overview
LM4050AIM3-2.5+ from Maxim Integrated is a precision 2.500V shunt voltage reference in SC70-3 package, featuring 0.1% initial accuracy, ±15ppm/°C temperature coefficient over –40°C to +125°C, 60µA–15mA operating current range, and 35µVRMS wideband noise (10Hz–10kHz). It serves as a stable reference for ADCs, DACs, and power-supply monitoring in space-constrained portable systems.
For engineers reviewing the LM4050AIM3-2.5+ datasheet, LM4050AIM3-2.5+ pinout, LM4050AIM3-2.5+ application, or LM4050AIM3-2.5+ equivalent, key selection criteria include guaranteed initial tolerance, low-tempco performance across automotive-grade temperature range, micropower operation down to 60µA, and stability with any capacitive load-no external capacitor required.
Technical Context
The LM4050AIM3-2.5+ implements a laser-trimmed bandgap core with integrated pass transistor to maintain precise reverse breakdown voltage under varying shunt current (60µA–15mA) and temperature (–40°C to +125°C). Its dynamic impedance remains ≤0.8Ω at 1mA/120Hz, enabling high PSRR and low output drift.
Unlike series references, it operates as a two-terminal shunt device requiring only an external series resistor (RS) for biasing. Pin 3 is NC and must be left floating or tied to pin 2-this configuration eliminates parasitic leakage paths and ensures specified long-term stability of 120ppm over 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±2.5mV at +25°C (A-grade); enables accurate 12-bit ADC reference without calibration |
| Initial Accuracy | ±0.1% (2.5mV max deviation); supports high-resolution measurement systems |
| Tempco | ±15ppm/°C max over –40°C to +125°C; contributes ≤±1.875mV drift across full range |
| Operating Current | 60µA to 15mA; allows ultra-low-power sensor nodes and high-current regulation simultaneously |
| Output Noise | 35µVRMS (10Hz–10kHz); minimizes quantization error in precision data acquisition |
| Dynamic Impedance | 0.3Ω to 0.8Ω at 1mA/120Hz; ensures stable regulation under fast load transients |
| Long-Term Stability | 120ppm over 1000h; reduces recalibration frequency in industrial instrumentation |
Pinout & Package
LM4050AIM3-2.5+ uses the 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. Thermal resistance θJA = 230°C/W enables operation up to +125°C ambient with proper PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode / Cathode Input | Positive terminal for reverse-bias connection; connects to supply rail via series resistor RS |
| 2 (−) | Cathode / Reference Output | Negative terminal; provides stable 2.500V reference node to load circuits |
| 3 (N.C.) | No Connection | Must be left floating or shorted to pin 2; prevents stray capacitance and leakage-induced error |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% board space vs. SOT23-critical for wearables and IoT edge nodes |
| No output capacitor required | Stable with any capacitive load (0–∞); eliminates BOM cost and layout sensitivity to decoupling |
| Laser-trimmed resistors | Enables 0.1% initial accuracy without post-package trimming-reduces test time and cost |
| Tolerates capacitive loads | Immune to oscillation with ceramic, tantalum, or electrolytic output caps-simplifies power-tree design |
| Micropower start-up | Regulates stably from 60µA; supports battery-powered systems with multi-year shelf life |
Applications
| Portable Medical Sensors | Industrial Data Acquisition |
|---|---|
Use Scenario: Battery-powered ECG front-end with 16-bit SAR ADC and low-noise instrumentation amplifier. IC Role / Device Role / Timing Role: Provides 2.500V reference for ADC and analog signal chain calibration. Use Value: 35µVRMS noise and ±15ppm/°C tempco ensure <0.01% total unadjusted error over temperature-meets IEC 60601-2-27 clinical accuracy requirements. | Use Scenario: 4–20mA loop-powered transmitter with microcontroller, DAC, and HART modem. IC Role / Device Role / Timing Role: Supplies stable reference for DAC output scaling and internal ADC monitoring. Use Value: 60µA minimum operating current enables operation during loop fault conditions (<3.5mA), maintaining diagnostic capability. |
| Automotive Cabin Control Units | Smart Energy Meters |
Use Scenario: HVAC control module with thermistor-based temperature sensing and PWM fan drivers. IC Role / Device Role / Timing Role: References ADC inputs measuring NTC/PTC sensors and supply rails. Use Value: Guaranteed –40°C to +125°C operation and 120ppm/1000h stability ensure reliable calibration across vehicle lifetime without field recalibration. | Use Scenario: Class 0.2 polyphase electricity meter using isolated sigma-delta ADCs and metrology SoC. IC Role / Device Role / Timing Role: High-accuracy reference for voltage and current channel ADCs. Use Value: 0.1% initial accuracy and low 35µVRMS noise directly contribute to meeting IEC 62053-22 accuracy class without trimming. |
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 tempco; requires external resistors for fixed output | Higher tempco and lower accuracy limit use in high-precision metrology; suitable for cost-sensitive consumer power management | Select when budget constraints outweigh precision needs and board space permits resistor network |
| ADR3425ARJZ-R7 | 2.5V series reference; 0.1% accuracy; 10ppm/°C tempco; 300µA quiescent current; requires output capacitor | Lower noise (12µVRMS) but higher supply current and strict capacitor requirement limit use in micropower designs | Prefer for ultra-low-noise applications where 300µA supply current and capacitor placement are acceptable |
Compared with TLVH431AIDBZR and ADR3425ARJZ-R7, the LM4050AIM3-2.5+ uniquely balances ultra-low 60µA operating current, 0.1% accuracy, ±15ppm/°C tempco, and capacitor-free stability-making it optimal for space- and power-constrained precision analog systems.
Availability
LM4050AIM3-2.5+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition, and automotive cabin control units requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4050AIM3-2.5+ 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-with emphasis on reliability, small size, and low power.
The LM4050/LM4051 family was engineered specifically for space-critical, micropower shunt reference applications requiring guaranteed accuracy and stability across –40°C to +125°C without external compensation components.
FAQ
What is the maximum shunt current the LM4050AIM3-2.5+ can safely handle?
The LM4050AIM3-2.5+ supports a continuous shunt current range of 60µA to 15mA. Absolute maximum rating is 20mA-exceeding this risks permanent damage. For reliable operation at 15mA, ensure junction temperature stays ≤+150°C using thermal derating (2.17mW/°C above +70°C) and adequate PCB copper pour.
Does the LM4050AIM3-2.5+ require an external output capacitor for stability?
No-the LM4050AIM3-2.5+ is internally compensated and remains stable with any output capacitance, including zero. This eliminates capacitor-related BOM cost, layout sensitivity, and aging effects. Unlike many series references, no minimum ESR or value is specified.
How does pin 3 (N.C.) affect performance if left unconnected?
Pin 3 must be left floating or connected to pin 2 (−). Leaving it unconnected is fully compliant and maintains all published specifications-including 0.1% accuracy and 120ppm/1000h stability. Connecting it to pin 2 adds redundancy against contamination-induced leakage but is not required for baseline performance.
What is the typical output voltage drift over temperature for the LM4050AIM3-2.5+?
Over –40°C to +125°C, the LM4050AIM3-2.5+ exhibits a maximum average temperature coefficient of ±15ppm/°C. At 2.500V output, this translates to ≤±1.875mV total drift across the full range-verified by production testing and guaranteed by design per datasheet Section "ELECTRICAL CHARACTERISTICS-2.500V".
Can the LM4050AIM3-2.5+ be used in forward-bias mode?
Yes-the LM4050AIM3-2.5+ clamps to approximately one diode drop (~0.7V) below ground when forward biased with up to 10mA. This behavior is specified in Absolute Maximum Ratings and enables dual-mode use (e.g., overvoltage protection), though precision reference operation occurs only in reverse-bias mode.
LM4050AIM3-2.5+ 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+ FAQ
1.How can I place an order for LM4050AIM3-2.5+ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIM3-2.5+ 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+ reliable?
The price and inventory of LM4050AIM3-2.5+ 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+ is usually 5 days.
3.What payment methods are accepted for LM4050AIM3-2.5+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIM3-2.5+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIM3-2.5+?
LM4050AIM3-2.5+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIM3-2.5+ 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+?
For technical support, including LM4050AIM3-2.5+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIM3-2.5+ requirements.
6.How does Aetrix verify that LM4050AIM3-2.5+ is sourced from the original manufacturer or authorized distributors?
All LM4050AIM3-2.5+ 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+ meets industry standards.
7.What is the process for return or replacement of LM4050AIM3-2.5+?
All LM4050AIM3-2.5+ units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIM3-2.5+, 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+ part is unused and in its original packaging.
Return procedure for LM4050AIM3-2.5+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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