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Analog Devices Inc./Maxim Integrated LM4050AIX3-3.0-T
- Part No.:
- LM4050AIX3-3.0-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050AIX3-3.0-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
LM4050AIX3-3.0-T from Maxim Integrated is a precision 3.000V, two-terminal shunt voltage reference in SC70-3 package, featuring 0.1% initial accuracy, ±15ppm/°C temperature coefficient (max), 60µA–15mA operating current range, and 45µVRMS wideband noise (10Hz–10kHz). It serves as a stable reference for ADCs, DACs, and power-supply monitoring in portable battery-powered systems.
For engineers reviewing the LM4050AIX3-3.0-T datasheet, LM4050AIX3-3.0-T pinout, LM4050AIX3-3.0-T application, or LM4050AIX3-3.0-T equivalent, this page delivers verified specifications, SC70-3 terminal mapping, real-world use cases in notebook computers and industrial controls, and validated alternative parts with documented technical differences.
Technical Context
The LM4050AIX3-3.0-T implements a laser-trimmed bandgap core with BiCMOS process, delivering fixed 3.000V reverse breakdown voltage across –40°C to +125°C. Its shunt architecture requires no external capacitor and tolerates arbitrary capacitive loads while maintaining stability.
It operates as a two-terminal device: cathode (Pin 1) and anode (Pin 2), with Pin 3 designated NC (must float or tie to Pin 2). Dynamic impedance is 0.3–0.8Ω at 1mA/120Hz, and long-term stability is 120ppm over 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V ±3.0mV at +25°C (A-grade); enables precise 12-bit ADC reference without calibration. |
| Initial Accuracy | ±0.1% (±3.0mV) at +25°C; eliminates need for system-level trimming in production test. |
| Tempco | ±15ppm/°C max over –40°C to +125°C; ensures ≤±0.6% total drift across full industrial range. |
| Operating Current | 60µA to 15mA shunt current; supports ultra-low-power sensor nodes and high-current regulation simultaneously. |
| Output Noise | 45µVRMS (10Hz–10kHz); suitable for 16-bit SAR ADCs without additional filtering. |
| Dynamic Impedance | 0.3–0.8Ω at 1mA/120Hz; minimizes load-induced voltage shift during transient current changes. |
| Long-Term Stability | 120ppm after 1000h; guarantees reference drift <0.012% over first year of operation. |
Pinout & Package
LM4050AIX3-3.0-T uses the 3-pin SC70 package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is NC and must be left floating or connected to Pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Cathode | Reverse-biased terminal; connects to regulated voltage node (e.g., ADC REF+). |
| Pin 2 (−) | Anode | Reference ground return path; must connect to system ground or low-impedance return. |
| Pin 3 (N.C.) | No Connection | Must remain unconnected or tied to Pin 2; not internally bonded-floating avoids parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% PCB space vs. SOT23, critical for wearables and compact modules. |
| No output capacitor required | Internally compensated-eliminates BOM cost, layout risk, and aging effects of external ceramics. |
| Tolerates capacitive loads | Stable with any COUT value (0–10µF), enabling direct connection to noisy digital supply rails. |
| Wide shunt current range | 60µA minimum ensures operation in µA-scale IoT sensors; 15mA max supports multi-channel analog front-ends. |
| Laser-trimmed accuracy | 0.1% grade achieved via on-die resistor trimming-no post-package calibration needed for high-yield manufacturing. |
Applications
| Portable Medical Sensors | Notebook Computer Power Monitoring |
|---|---|
Use Scenario: Continuous glucose monitor with 16-bit ADC sampling battery voltage and sensor bias. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.000V reference for ADC and LDO feedback. Use Value: 45µVRMS noise and ±15ppm/°C tempco ensure <0.01% measurement error across body-temperature range. |
Use Scenario: Real-time battery fuel-gauge IC monitoring 3.3V system rail and 5V charger input. IC Role / Device Role / Timing Role: Precision 3.000V reference for dual-channel voltage supervisor and ADC. Use Value: 0.1% initial accuracy eliminates factory calibration; SC70 size fits tight space near battery connector. |
| Industrial Process Controller I/O Module | Smart Energy Meter Reference |
Use Scenario: 4–20mA transmitter with isolated 24V loop supply and 12-bit DAC output stage. IC Role / Device Role / Timing Role: Shunt reference setting DAC full-scale voltage and current-sense amplifier gain. Use Value: –40°C to +125°C guaranteed operation and 120ppm long-term stability meet IEC 61000-6-2 industrial requirements. |
Use Scenario: Polyphase energy meter using 24-bit sigma-delta ADCs for voltage and current channel measurement. IC Role / Device Role / Timing Role: Primary 3.000V reference for metrology ADC and secondary reference for RTC backup regulator. Use Value: Low 45µVRMS noise prevents quantization dither in high-resolution measurements; no capacitor simplifies conformal coating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBVR | Adjustable (2.5V–36V) 3-pin shunt; 0.5% initial accuracy; 100ppm/°C tempco; requires external resistors for 3.0V setpoint. | Higher design flexibility but adds resistor tolerance error and board area; less stable over temperature. | Select when adjustable output or higher voltage (>3.0V) is needed; avoid for precision 3.000V fixed reference. |
| REF3030AIDBZR | 3.0V series reference; 0.2% initial accuracy; 50ppm/°C tempco; requires 1.2µA supply current and output capacitor. | Higher quiescent current and mandatory 1µF output cap increase BOM cost and reduce reliability in humid environments. | Select only if low-output-impedance source is required; LM4050AIX3-3.0-T preferred for shunt topology and zero-capacitor simplicity. |
Compared with TLVH431ACDBVR and REF3030AIDBZR, LM4050AIX3-3.0-T delivers superior 0.1% accuracy and lower 15ppm/°C tempco in a smaller SC70 package without external components-making it optimal for space-constrained, high-stability shunt reference designs.
Availability
LM4050AIX3-3.0-T is available at Aetrix Electronics and suitable for portable medical sensors, notebook computer power monitoring, industrial process controllers, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050AIX3-3.0-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 industrial, automotive, and computing applications, with emphasis on low-power, high-accuracy performance.
The LM4050/LM4051 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-reliability systems demanding stable reference voltages from –40°C to +125°C.
FAQ
What is the exact output voltage tolerance of LM4050AIX3-3.0-T at +25°C?
The LM4050AIX3-3.0-T has a reverse breakdown voltage of 3.000V with ±3.0mV (±0.1%) tolerance at +25°C, as specified for the 'A' grade in the Electrical Characteristics table for 3.000V devices. This is confirmed by the selector guide listing LM4050AEX3-3.0+T with 0.1% initial accuracy and 3.000V nominal output.
Does LM4050AIX3-3.0-T require an external output capacitor?
No, LM4050AIX3-3.0-T does not require an external output capacitor. The datasheet explicitly states "No Output Capacitors Required" and confirms stability with any capacitive load, including 0µF. This eliminates BOM cost, layout complexity, and capacitor aging concerns in long-life applications.
What is the correct handling of Pin 3 on LM4050AIX3-3.0-T?
Pin 3 of LM4050AIX3-3.0-T is labeled N.C. (No Connection) and must be left floating or connected to Pin 2 (anode). The datasheet's Pin Description section and top-view diagram both state "PIN 3 MUST BE LEFT FLOATING OR CONNECTED TO PIN 2"-it is not internally bonded and improper connection risks parasitic leakage or instability.
What is the minimum operating current for LM4050AIX3-3.0-T?
The minimum operating current (IRMIN) for LM4050AIX3-3.0-T is 67µA, as specified in the Electrical Characteristics table for 3.000V devices under the 'LM4050A' row. Operation below this current may result in loss of regulation or increased output voltage drift.
How does LM4050AIX3-3.0-T perform over temperature?
LM4050AIX3-3.0-T guarantees ±15ppm/°C temperature coefficient over –40°C to +125°C, resulting in ≤±0.6% total output variation across the full range. Typical output voltage vs. temperature plots (e.g., for 2.5V and 5.0V variants) confirm monotonic, low-drift behavior consistent with bandgap design principles.
LM4050AIX3-3.0-T 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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 45µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 67 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4050AIX3-3.0-T FAQ
1.How can I place an order for LM4050AIX3-3.0-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIX3-3.0-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 LM4050AIX3-3.0-T reliable?
The price and inventory of LM4050AIX3-3.0-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AIX3-3.0-T is usually 5 days.
3.What payment methods are accepted for LM4050AIX3-3.0-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIX3-3.0-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIX3-3.0-T?
LM4050AIX3-3.0-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIX3-3.0-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 LM4050AIX3-3.0-T?
For technical support, including LM4050AIX3-3.0-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIX3-3.0-T requirements.
6.How does Aetrix verify that LM4050AIX3-3.0-T is sourced from the original manufacturer or authorized distributors?
All LM4050AIX3-3.0-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 LM4050AIX3-3.0-T meets industry standards.
7.What is the process for return or replacement of LM4050AIX3-3.0-T?
All LM4050AIX3-3.0-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIX3-3.0-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 LM4050AIX3-3.0-T part is unused and in its original packaging.
Return procedure for LM4050AIX3-3.0-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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