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Analog Devices Inc./Maxim Integrated LM4050AIX3-2.1-T
- Part No.:
- LM4050AIX3-2.1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050AIX3-2.1-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
LM4050AIX3-2.1-T from Maxim Integrated is a precision 2.048V shunt voltage reference in SC70-3 package, featuring 0.1% initial accuracy, ±15ppm/°C temperature coefficient (max), 60µA–15mA operating current range, and 28µVRMS wideband noise (10Hz–10kHz). It serves as a stable reference in high-accuracy ADC/DAC biasing, portable power monitoring, and battery-fueled instrumentation.
For engineers reviewing the LM4050AIX3-2.1-T datasheet, LM4050AIX3-2.1-T pinout, LM4050AIX3-2.1-T application, or LM4050AIX3-2.1-T equivalent, this page delivers verified electrical specs, SC70-3 terminal mapping, grade-A accuracy validation, thermal stability data across –40°C to +125°C, and direct alternatives for space-constrained analog signal chains.
Technical Context
The LM4050AIX3-2.1-T implements a laser-trimmed bandgap core with BiCMOS process, delivering fixed 2.048V reverse breakdown voltage without external stabilization capacitors. Its shunt architecture sinks load-dependent current while maintaining regulation across 60µA–15mA, with dynamic impedance ≤0.8Ω at 1mA/120Hz.
Guaranteed over –40°C to +125°C, it achieves ±2.0mV (±0.1%) total tolerance at +25°C and ≤±12mV full-temperature-range error for Grade A. Pin 3 is NC-must float or tie to pin 2-and the device clamps to ~0.7V below ground under forward bias up to 10mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V nominal reverse breakdown voltage; enables precise 12-bit DAC/ADC full-scale referencing (e.g., 2.048V = 1 LSB = 0.5mV for 4096-step conversion). |
| Initial Accuracy | ±2.0mV (0.1%) at +25°C; ensures single-point calibration suffices for systems requiring <0.2% absolute voltage error. |
| Tempco | ±15ppm/°C max over –40°C to +125°C; contributes ≤±1.5mV drift across full range-critical for industrial sensor front-ends. |
| Operating Current | 60µA to 15mA shunt current range; supports ultra-low-power wake-up circuits (e.g., 60µA sleep mode) and high-current precision regulators (e.g., 15mA for low-Z loads). |
| Output Noise | 28µVRMS (10Hz–10kHz); limits RMS error to <0.0014% of 2.048V-suitable for 16-bit measurement systems. |
| Dynamic Impedance | ≤0.8Ω at 1mA/120Hz; maintains <0.8mV output shift under 1mA load transients-essential for stable feedback in precision LDOs. |
| Long-Term Stability | 120ppm (0.012%) over 1000 hours; ensures <0.25mV drift in 6-month deployed instrumentation. |
Pinout & Package
LM4050AIX3-2.1-T uses the 3-pin SC70 package (1.8mm × 1.8mm), 50% smaller than SOT23, optimized for PCB area-constrained designs like wearable biosensors and compact IoT nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode / Positive Reference Terminal | Connects to system ground or low-impedance return path; reverse-biased operation requires current sink into this node. |
| Pin 2 (−) | Cathode / Negative Reference Terminal | Carries regulated 2.048V output; connects to VREF input of ADC/DAC or error amplifier; must be decoupled locally if driving capacitive loads >1nF. |
| Pin 3 (N.C.) | No Connection | Must remain unconnected or tied directly to pin 2; floating pin 3 avoids parasitic leakage paths that degrade long-term stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm body saves >50% board area vs. SOT23-enables dense mixed-signal layouts in handheld medical devices. |
| No output capacitor required | Internally compensated for stability with any capacitive load; eliminates BOM cost and layout risk of external COUT in battery-powered sensors. |
| Wide shunt current range | 60µA minimum ensures operation in nanoamp sleep modes; 15mA maximum supports active regulation for 10kΩ load at 2.048V. |
| Laser-trimmed accuracy | 0.1% initial tolerance achieved via on-die resistor trimming-reduces need for system-level calibration in production test. |
| Low wideband noise | 28µVRMS (10Hz–10kHz) enables <1LSB noise floor in 16-bit SAR ADCs sampling at 1MSPS with proper filtering. |
Applications
| Battery-Fueled Data Loggers | Portable Medical Sensors |
|---|---|
Use Scenario: Continuous 24/7 temperature/humidity logging in remote environmental monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Provides stable 2.048V reference for 12-bit ADC converting analog sensor outputs; regulates shunt current to match varying supply voltage (2.2V–3.6V). Use Value: 60µA minimum operating current extends battery life beyond 5 years; ±0.1% accuracy ensures traceable NIST-calibrated readings without field recalibration. |
Use Scenario: ECG front-end in handheld cardiac rhythm analyzers where size and low-noise performance are critical. IC Role / Device Role / Timing Role: Supplies reference voltage to instrumentation amplifier gain-setting resistors and ADC input stage; operates in ultra-low-power standby between patient measurements. Use Value: 28µVRMS noise prevents baseline wander in sub-µV ECG signals; SC70-3 package fits within 8mm² PCB real estate constraints. |
| Industrial Process Transmitters | Smart Energy Meters |
Use Scenario: 4–20mA loop-powered pressure transmitter operating in –40°C to +85°C ambient environments. IC Role / Device Role / Timing Role: Generates precision 2.048V reference for DAC-driven current loop control; withstands wide supply variations (7V–36V) via series resistor design. Use Value: ±15ppm/°C tempco ensures <±0.015% span error over temperature-meets ANSI/ISA-71.04 Class G2 corrosion severity requirements. |
Use Scenario: Revenue-grade electricity meter requiring metrology-grade voltage reference for polyphase energy calculation. IC Role / Device Role / Timing Role: References 24-bit sigma-delta ADC measuring phase voltages; operates continuously at 125°C junction temperature in sealed meter enclosures. Use Value: Guaranteed operation to +125°C ambient and 120ppm 1000h stability ensure <0.1% metering error over 10-year service life per IEC 62053-21. |
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) vs. fixed 2.048V; 0.5% initial accuracy; higher 100ppm/°C tempco; SOT23-3 only. | Requires external resistor divider for 2.048V setting; less accurate and thermally stable than LM4050AIX3-2.1-T. | Choose when adjustable output or higher voltage capability is needed; avoid for metrology-grade 2.048V references. |
| ADR3420ARJZ-R7 | Fixed 2.048V; 0.1% accuracy; ±3ppm/°C tempco; 50µA–15mA range; SOT23-5 package with enable pin. | Lower noise (12µVRMS) and superior tempco but larger footprint and higher cost; enable pin adds complexity. | Prefer for ultra-high-stability applications where SC70-3 size isn't mandatory and budget allows premium performance. |
Compared with TLVH431ACDBVR and ADR3420ARJZ-R7, LM4050AIX3-2.1-T uniquely balances SC70-3 miniaturization, 0.1% accuracy, and guaranteed –40°C to +125°C operation without enable logic-making it optimal for space- and temperature-critical embedded analog systems.
Availability
LM4050AIX3-2.1-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical diagnostics, and industrial process transmitters requiring stable component supply with guaranteed long-term availability.
Supply support for LM4050AIX3-2.1-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, medical, and communications applications, emphasizing low-power, high-accuracy, and small-footprint solutions.
LM4050AIX3-2.1-T belongs to the LM4050/LM4051 family of micropower shunt references engineered specifically for space-constrained, high-stability voltage referencing in portable and harsh-environment systems.
FAQ
What is the guaranteed operating temperature range for LM4050AIX3-2.1-T?
The LM4050AIX3-2.1-T is fully specified and guaranteed over –40°C to +125°C ambient temperature. All key parameters-including 2.048V output voltage, ±0.1% initial accuracy, and ±15ppm/°C temperature coefficient-are validated across this full industrial range per Maxim's production test protocol.
Does LM4050AIX3-2.1-T require an external output capacitor for stability?
No, LM4050AIX3-2.1-T does not require an external output capacitor. Its internal compensation 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 sensitivity.
What is the minimum shunt current needed for LM4050AIX3-2.1-T to regulate properly?
The LM4050AIX3-2.1-T requires a minimum shunt current of 60µA to maintain regulation. Below this threshold, output voltage deviates from 2.048V; design must ensure RS selection guarantees ≥60µA under worst-case conditions (min VS, max ILOAD).
How is pin 3 used on LM4050AIX3-2.1-T?
Pin 3 of LM4050AIX3-2.1-T is labeled N.C. (No Connection) and must either be left floating or connected directly to pin 2 (cathode). Connecting pin 3 elsewhere-or leaving it unterminated near noisy traces-can introduce leakage paths that degrade long-term voltage stability.
What does the 'A' grade signify in LM4050AIX3-2.1-T?
The 'A' in LM4050AIX3-2.1-T denotes Grade A accuracy: ±0.1% (±2.0mV) initial tolerance at +25°C and ±12mV total error over –40°C to +125°C. This grade uses laser-trimmed resistors and is selected during final test to meet tight metrological requirements.
LM4050AIX3-2.1-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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 28µVrms
- 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
LM4050AIX3-2.1-T FAQ
1.How can I place an order for LM4050AIX3-2.1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIX3-2.1-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 LM4050AIX3-2.1-T reliable?
The price and inventory of LM4050AIX3-2.1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AIX3-2.1-T is usually 5 days.
3.What payment methods are accepted for LM4050AIX3-2.1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIX3-2.1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIX3-2.1-T?
LM4050AIX3-2.1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIX3-2.1-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 LM4050AIX3-2.1-T?
For technical support, including LM4050AIX3-2.1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIX3-2.1-T requirements.
6.How does Aetrix verify that LM4050AIX3-2.1-T is sourced from the original manufacturer or authorized distributors?
All LM4050AIX3-2.1-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 LM4050AIX3-2.1-T meets industry standards.
7.What is the process for return or replacement of LM4050AIX3-2.1-T?
All LM4050AIX3-2.1-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIX3-2.1-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 LM4050AIX3-2.1-T part is unused and in its original packaging.
Return procedure for LM4050AIX3-2.1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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