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Analog Devices Inc./Maxim Integrated LM4050AIX3-2.5-T
- Part No.:
- LM4050AIX3-2.5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050AIX3-2.5-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
LM4050AIX3-2.5-T from Maxim Integrated is a precision 2.500V shunt voltage reference in SC70-3 package, delivering 0.1% initial accuracy, ±15ppm/°C temperature coefficient over –40°C to +125°C, and stable regulation across 60µA–15mA shunt current. It serves as a compact, low-noise reference for ADC/DAC biasing, portable power monitoring, and battery-fueled instrumentation.
For engineers reviewing the LM4050AIX3-2.5-T datasheet, LM4050AIX3-2.5-T pinout, LM4050AIX3-2.5-T application, or LM4050AIX3-2.5-T equivalent, this page provides verified specifications, validated pin functions, real-world use cases, and confirmed alternative options for high-accuracy analog signal chains requiring minimal board space and no output capacitor.
Technical Context
The LM4050AIX3-2.5-T uses laser-trimmed bandgap circuitry to maintain a fixed 2.500V reverse breakdown voltage with <±2.5mV tolerance at +25°C and <±15ppm/°C drift over full industrial temperature range. Its BiCMOS process enables ultra-low 35µVRMS wideband noise (10Hz–10kHz) and 0.3Ω typical dynamic impedance at 1mA.
As a two-terminal shunt device, it operates without external stabilization capacitors and tolerates arbitrary capacitive loads. Pin 3 is unconnected (N.C.) or tied to pin 2, eliminating layout ambiguity in SC70-3 footprint implementation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±2.5mV at +25°C - ensures precise 12-bit+ ADC reference without calibration. |
| Initial Accuracy | 0.1% (A-grade) - guarantees ≤2.5mV absolute error at room temperature for factory-set systems. |
| Tempco | ±15ppm/°C max - limits voltage drift to ±1.875mV over –40°C to +125°C ambient. |
| Shunt Current Range | 60µA to 15mA - supports micropower sensor nodes and higher-current analog front-ends. |
| Output Noise | 35µVRMS (10Hz–10kHz) - minimizes quantization uncertainty in precision measurement circuits. |
| Dynamic Impedance | 0.3Ω typ. at 1mA - maintains voltage stability under fast load transients up to 2.5mA step. |
| Long-Term Stability | 120ppm after 1000h - predicts <0.12% output shift over 1 year in continuous operation. |
Pinout & Package
LM4050AIX3-2.5-T is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23-3, optimized for space-constrained PCBs in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode / Positive Terminal | Connects to system ground or low-impedance return path; defines reference node polarity. |
| 2 (−) | Cathode / Negative Terminal | Receives shunt current; voltage develops across pins 1–2 when reverse-biased above 2.5V. |
| 3 (N.C.) | No Connection | Must be left floating or shorted to pin 2; no internal connection-prevents misrouting in layout. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 package | 1.8mm × 1.8mm footprint saves >50% board area vs. SOT23-3, critical for wearables and IoT sensors. |
| No output capacitor required | Internally compensated for stability with any capacitive load-eliminates BOM cost and layout risk. |
| Wide shunt current range | 60µA–15mA operation enables single-part support from nanoamp battery monitors to 10-bit DAC references. |
| Low 35µVRMS noise | Reduces effective number of bits (ENOB) degradation in 16-bit+ SAR ADCs powered from same rail. |
| Laser-trimmed accuracy | 0.1% initial tolerance achieved via on-die resistor trimming-avoids post-assembly calibration. |
Applications
| Battery-Fueled Instrumentation | Portable Medical Sensors |
|---|---|
Use Scenario: Handheld multimeter measuring 0–2.5V DC signals with 12-bit resolution. IC Role / Device Role / Timing Role: Provides stable 2.500V reference for ADC conversion, rejecting supply ripple and thermal drift. Use Value: Enables ±0.01% full-scale accuracy over –10°C to +50°C operating range without recalibration. |
Use Scenario: Wearable ECG front-end digitizing microvolt-level biopotentials. IC Role / Device Role / Timing Role: Supplies low-noise reference for programmable gain amplifier and 16-bit sigma-delta ADC. Use Value: 35µVRMS noise contributes <0.05 LSB error, preserving diagnostic signal fidelity. |
| Industrial Process Transmitters | Smart Energy Meters |
Use Scenario: Loop-powered 4–20mA transmitter operating from 12–36V supply with local sensing. IC Role / Device Role / Timing Role: Shunt reference sets precision current-sense threshold and ADC scaling in isolated analog section. Use Value: ±15ppm/°C tempco ensures <±0.02% reading error across –40°C to +85°C field environments. |
Use Scenario: Revenue-grade electricity meter requiring metrology-grade voltage reference for RMS calculation. IC Role / Device Role / Timing Role: Supplies 2.500V reference to anti-aliasing filter and high-resolution ADC sampling mains waveform. Use Value: 120ppm long-term stability meets IEC 62053-21 Class 0.2 accuracy retention over 10-year service life. |
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; 90ppm/°C tempco; SOT23-3 package. | Requires external resistors for 2.5V setting; higher drift limits use in extended temperature industrial settings. | Select when cost sensitivity outweighs precision needs and board space allows resistor placement. |
| ADR3425ARJZ-R7 | 2.5V series reference; 0.1% accuracy; 10ppm/°C tempco; 6-pin SOT23 package; requires input capacitor. | Three-terminal architecture demands additional input decoupling; unsuitable for shunt-based topologies. | Choose only if system topology permits series configuration and lower tempco justifies added complexity. |
Compared with TLVH431AIDBZR and ADR3425ARJZ-R7, LM4050AIX3-2.5-T delivers superior thermal stability in shunt mode with zero external components, making it optimal for compact, capacitor-free, high-accuracy analog subsystems where pin count and layout simplicity are critical.
Availability
LM4050AIX3-2.5-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical sensors, and industrial process transmitters requiring stable component supply with guaranteed long-term availability.
Supply support for LM4050AIX3-2.5-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 performance applications in industrial, medical, and communications markets.
The LM4050/LM4051 family was engineered specifically for space-constrained, high-accuracy shunt reference needs-delivering micropower operation, laser-trimmed stability, and SC70 packaging without sacrificing specification rigor.
FAQ
What is the maximum shunt current rating for LM4050AIX3-2.5-T?
The LM4050AIX3-2.5-T supports up to 15mA shunt current while maintaining regulation and specified accuracy. Absolute maximum reverse current is 20mA per Absolute Maximum Ratings; sustained operation above 15mA risks exceeding thermal limits in the SC70 package, especially above +85°C ambient.
Does LM4050AIX3-2.5-T require an external output capacitor?
No, LM4050AIX3-2.5-T does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to ADC reference inputs or op-amp feedback networks-eliminating capacitor-related BOM cost and layout constraints.
What is the temperature coefficient specification for LM4050AIX3-2.5-T?
The LM4050AIX3-2.5-T has a guaranteed temperature coefficient of ±15ppm/°C over –40°C to +125°C. This translates to a maximum voltage drift of ±1.875mV across the full temperature range, enabling high-precision applications without active compensation.
How is pin 3 used on LM4050AIX3-2.5-T?
Pin 3 of LM4050AIX3-2.5-T is labeled N.C. (No Connection) and must be left floating or connected to pin 2 (cathode). It has no internal connection-this configuration prevents unintended parasitic paths and ensures correct shunt operation in the SC70-3 footprint.
What is the long-term stability of LM4050AIX3-2.5-T after 1000 hours?
LM4050AIX3-2.5-T exhibits 120ppm reverse breakdown voltage shift after 1000 hours of operation at +125°C junction temperature. This equates to a 0.012% change in 2.500V output, supporting reliable performance in mission-critical analog systems over multi-year deployments.
LM4050AIX3-2.5-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):
- 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:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4050AIX3-2.5-T FAQ
1.How can I place an order for LM4050AIX3-2.5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIX3-2.5-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 LM4050AIX3-2.5-T reliable?
The price and inventory of LM4050AIX3-2.5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AIX3-2.5-T is usually 5 days.
3.What payment methods are accepted for LM4050AIX3-2.5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIX3-2.5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIX3-2.5-T?
LM4050AIX3-2.5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIX3-2.5-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 LM4050AIX3-2.5-T?
For technical support, including LM4050AIX3-2.5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIX3-2.5-T requirements.
6.How does Aetrix verify that LM4050AIX3-2.5-T is sourced from the original manufacturer or authorized distributors?
All LM4050AIX3-2.5-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 LM4050AIX3-2.5-T meets industry standards.
7.What is the process for return or replacement of LM4050AIX3-2.5-T?
All LM4050AIX3-2.5-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIX3-2.5-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 LM4050AIX3-2.5-T part is unused and in its original packaging.
Return procedure for LM4050AIX3-2.5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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