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Analog Devices Inc./Maxim Integrated LM4050AIX3-5.0
- Part No.:
- LM4050AIX3-5.0
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050AIX3-5.0.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:1,675
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Product details
Overview
LM4050AIX3-5.0 from Maxim Integrated is a precision 5.000V shunt voltage reference in SC70-3 package, featuring 0.1% initial accuracy, ±15ppm/°C temperature coefficient (max), and 60µA–15mA operating current range. It delivers stable reverse breakdown voltage for ADC/DAC biasing, sensor excitation, and portable power monitoring circuits.
For engineers reviewing the LM4050AIX3-5.0 datasheet, LM4050AIX3-5.0 pinout, LM4050AIX3-5.0 application, or LM4050AIX3-5.0 equivalent, key selection criteria include guaranteed -40°C to +125°C operation, no external capacitor requirement, low 80µVRMS wideband noise (10Hz–10kHz), and SC70 footprint compatibility with space-constrained PCB layouts.
Technical Context
The LM4050AIX3-5.0 uses laser-trimmed bandgap circuitry to maintain precise 5.000V reverse breakdown across its cathode-anode terminals. Its internal BiCMOS design enables stable regulation without output capacitance while tolerating any capacitive load.
It operates as a two-terminal shunt device: reverse current (60µA–15mA) flows from cathode to anode to clamp voltage at 5.000V ±5.0mV (TA = +25°C), with dynamic impedance of 0.5–1.1Ω at 1mA/120Hz. Pin 3 is NC and must be left floating or tied to pin 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±5.0mV at +25°C - ensures accurate reference for 12-bit+ data converters |
| Initial Accuracy | 0.1% (A-grade) - eliminates need for system-level trimming in production |
| Tempco | ±15ppm/°C max over -40°C to +125°C - supports industrial temperature stability without compensation |
| Operating Current | 60µA to 15mA - enables micropower battery operation and high-current precision sensing |
| Wideband Noise | 80µVRMS (10Hz–10kHz) - minimizes quantization error in high-resolution analog front-ends |
| Dynamic Impedance | 0.5–1.1Ω at 1mA - maintains voltage stability under fast load transients |
| Long-Term Stability | 120ppm over 1000h - ensures calibration retention in field-deployed instrumentation |
Pinout & Package
SC70-3 package (1.8mm × 1.8mm × 0.9mm), 50% smaller than SOT23-3. Ultra-compact footprint ideal for wearables and IoT edge nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode | Reverse-bias input terminal; connects to higher-potential supply rail |
| 2 (−) | Anode | Reference ground node; ties to system GND or feedback point |
| 3 (N.C.) | No Connection | Must remain unconnected or shorted to pin 2 - not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| 0.1% Initial Accuracy | Reduces post-manufacturing calibration steps in medical and test equipment |
| No Output Capacitor Required | Eliminates BOM cost and layout area for stability components in compact designs |
| SC70-3 Package | Enables <1.0mm² board area usage - critical for ultra-thin portable devices |
| Stable with Any Capacitive Load | Supports direct connection to ADC input caps or long PCB traces without oscillation |
| 60µA Minimum Operating Current | Permits operation from coin-cell batteries (e.g., CR2032) for >5 years in sleep mode |
Applications
| Portable Instrumentation | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Handheld multimeter with dual-range 16-bit SAR ADC and auto-ranging power supply. IC Role / Device Role / Timing Role: Provides 5.000V reference for ADC full-scale calibration and internal LDO feedback. Use Value: 0.1% accuracy and ±15ppm/°C tempco ensure <0.01% measurement drift across -10°C to +50°C ambient. | Use Scenario: 4–20mA loop-powered pressure transmitter with HART modulation. IC Role / Device Role / Timing Role: Supplies stable excitation voltage to piezoresistive bridge and reference for DAC-controlled current output. Use Value: 60µA–15mA operating range accommodates both low-power sleep (60µA) and active HART comms (12mA) without reference dropout. |
| Battery-Managed Wearables | Automotive Cabin Sensors |
Use Scenario: Smartwatch with integrated ECG front-end and fuel-gauge IC. IC Role / Device Role / Timing Role: Reference for low-noise instrumentation amplifier and ADC sampling of biopotential signals. Use Value: 80µVRMS noise floor prevents degradation of ECG signal-to-noise ratio below 40dB. | Use Scenario: Occupancy detection module using MEMS accelerometer and temperature sensor in HVAC control unit. IC Role / Device Role / Timing Role: Precision reference for ratiometric sensor measurements and microcontroller ADC channel calibration. Use Value: Guaranteed operation from -40°C to +125°C meets automotive AEC-Q200 ambient requirements without derating. |
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 (via resistors); 0.5% initial accuracy; 100ppm/°C tempco; SOT23-3 | Requires external resistor network for 5V setting; less stable over temperature | Select when adjustable output or lower cost outweighs precision and thermal performance needs |
| ADR3450ARJZ-R7 | 5.0V; 0.1% accuracy; 10ppm/°C tempco; SC70-5; series topology (3-pin) | Higher quiescent current (120µA min); requires input-to-output headroom; different pinout | Choose for lowest tempco where series architecture fits supply constraints and layout allows SC70-5 |
Compared with TLVH431AIDBZR and ADR3450ARJZ-R7, the LM4050AIX3-5.0 offers superior thermal stability in shunt configuration, minimal board area, and true zero-headroom operation - making it optimal for ultra-low-power, fixed-voltage, space-critical references.
Availability
LM4050AIX3-5.0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and battery-managed wearables requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4050AIX3-5.0 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, medical, and communications applications.
The LM4050/LM4051 family delivers micropower shunt references optimized for space-constrained, wide-temperature, and low-noise systems - targeting portable test gear, sensor modules, and automotive cabin electronics.
FAQ
What is the minimum operating current for LM4050AIX3-5.0?
The LM4050AIX3-5.0 requires a minimum shunt current of 60µA to maintain regulation. This value is confirmed across the full -40°C to +125°C temperature range and enables ultra-low-power operation in battery-backed systems. Below 60µA, the device exits regulation and output voltage drops nonlinearly.
Does LM4050AIX3-5.0 require an external capacitor for stability?
No, the LM4050AIX3-5.0 does not require an external output capacitor and remains stable with any capacitive load - including direct connection to ADC input capacitors or long PCB traces. This eliminates BOM cost and layout complexity while maintaining 5.000V accuracy across all operating conditions.
What is the temperature coefficient specification for LM4050AIX3-5.0?
The LM4050AIX3-5.0 has a guaranteed temperature coefficient of ±15ppm/°C over -40°C to +125°C. This value applies to the A-grade variant and ensures total output variation remains within ±0.6% across the full temperature range, enabling high-accuracy measurements without software compensation.
Can pin 3 of LM4050AIX3-5.0 be left unconnected?
Yes - pin 3 of LM4050AIX3-5.0 is designated N.C. (no connection) and must be left floating or connected to pin 2 (anode). It is not internally bonded and serves no electrical function; incorrect connection to a voltage rail may damage the device or degrade performance.
What is the wideband noise performance of LM4050AIX3-5.0?
The LM4050AIX3-5.0 exhibits 80µVRMS wideband noise over 10Hz–10kHz at 100µA operating current. This low noise floor preserves signal integrity in precision analog signal chains, such as ECG front-ends or high-resolution data acquisition systems, where reference noise directly impacts effective resolution.
LM4050AIX3-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4050AIX3-5.0 FAQ
1.How can I place an order for LM4050AIX3-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIX3-5.0 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 LM4050AIX3-5.0 reliable?
The price and inventory of LM4050AIX3-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AIX3-5.0 is usually 5 days.
3.What payment methods are accepted for LM4050AIX3-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIX3-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIX3-5.0?
LM4050AIX3-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIX3-5.0 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 LM4050AIX3-5.0?
For technical support, including LM4050AIX3-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIX3-5.0 requirements.
6.How does Aetrix verify that LM4050AIX3-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4050AIX3-5.0 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 LM4050AIX3-5.0 meets industry standards.
7.What is the process for return or replacement of LM4050AIX3-5.0?
All LM4050AIX3-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIX3-5.0, 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 LM4050AIX3-5.0 part is unused and in its original packaging.
Return procedure for LM4050AIX3-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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