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Analog Devices Inc./Maxim Integrated LM4050AIX3-4.1
- Part No.:
- LM4050AIX3-4.1
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050AIX3-4.1.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:2,167
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Product details
Overview
LM4050AIX3-4.1 from Maxim Integrated is a precision 4.096V shunt voltage reference in SC70-3 package, featuring 0.1% initial accuracy, ±15ppm/°C temperature coefficient (max), 64µVRMS wideband noise (10Hz–10kHz), and stable operation from 73µA to 15mA shunt current. It serves as a compact, low-power reference for ADC/DAC biasing, portable instrumentation, and battery-powered sensor signal chains.
For engineers reviewing the LM4050AIX3-4.1 datasheet, LM4050AIX3-4.1 pinout, LM4050AIX3-4.1 application, or LM4050AIX3-4.1 equivalent, key selection criteria include guaranteed -40°C to +125°C operation, no external capacitor requirement, tolerance of capacitive loads, and compatibility with micropower supply designs requiring <100µA minimum operating current.
Technical Context
The LM4050AIX3-4.1 uses a laser-trimmed bandgap core to deliver a fixed 4.096V reverse breakdown voltage with tight initial tolerance and low thermal drift. Its two-terminal shunt architecture operates without series pass transistors-regulation is achieved by sinking variable current through an external series resistor.
It exhibits low dynamic impedance (0.5–1.0Ω at 1mA), enabling stable output under varying load conditions, and maintains specified performance across its full 73µA–15mA operating current range without oscillation-even with arbitrary capacitive loading up to several µF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V ±4.1mV at +25°C (A-grade); enables precise 12-bit DAC/ADC full-scale referencing |
| Initial Accuracy | ±0.1% (±4.1mV) - supports high-resolution data conversion without calibration |
| Tempco | ±15ppm/°C max over -40°C to +125°C - contributes ≤±0.61mV drift across full range |
| Shunt Current Range | 73µA to 15mA - allows use with high-impedance bias networks or moderate-load regulators |
| Wideband Noise | 64µVRMS (10Hz–10kHz) - suitable for 16-bit SAR ADC reference without added filtering |
| Dynamic Impedance | 0.5Ω (typ) at 1mA - ensures <1mV output shift for 500µA load transients |
| Long-Term Stability | 120ppm (1000h) - supports >10-year system calibration integrity in sealed modules |
Pinout & Package
LM4050AIX3-4.1 is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm × 0.9mm), 50% smaller than SOT23-3. Pin 3 is NC and must be left floating or tied to Pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode / Cathode Reference Terminal | Positive terminal of shunt reference; connects to regulated node (e.g., ADC REF+) |
| Pin 2 (−) | Cathode / Ground Reference Terminal | Negative terminal; ties to system ground or low-impedance return path |
| Pin 3 (N.C.) | No Connection | Must remain unconnected or shorted to Pin 2; no internal function |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves PCB space in wearables and handheld medical devices |
| No output capacitor required | Eliminates BOM cost and layout risk associated with stability-compensating ceramics |
| Capacitive load tolerance | Stable with any output capacitance - simplifies filtering for noisy mixed-signal environments |
| Micropower operation down to 73µA | Enables direct use from coin-cell or energy-harvesting sources without LDO pre-regulation |
| Guaranteed -40°C to +125°C operation | Validated for automotive cabin electronics, industrial PLC I/O modules, and downhole sensors |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitor logging temperature, humidity, and pressure at 10s intervals. IC Role / Device Role / Timing Role: Provides stable 4.096V reference for 16-bit sigma-delta ADC measuring bridge-based sensors. Use Value: Enables ±0.05% measurement accuracy over -25°C to +70°C ambient with no recalibration. | Use Scenario: 4–20mA loop-powered transmitter for pressure sensing in factory automation. IC Role / Device Role / Timing Role: Supplies precision reference to current-loop DAC and sensor signal conditioning circuitry. Use Value: Maintains 0.1% full-scale accuracy across 4–20mA span despite 100°C ambient swings. |
| Medical Wearables | Automotive Cabin Electronics |
Use Scenario: ECG patch with ultra-low-power analog front-end and Bluetooth LE telemetry. IC Role / Device Role / Timing Role: References low-noise instrumentation amplifier and SAR ADC sampling biopotential signals. Use Value: 64µVRMS noise ensures ≥85dB SNR for 1kHz bandwidth ECG acquisition. | Use Scenario: In-cabin air quality sensor module with CO₂, VOC, and humidity sensing. IC Role / Device Role / Timing Role: Supplies reference to multi-channel ADC reading electrochemical and NDIR sensor outputs. Use Value: Guaranteed operation to +125°C allows placement near HVAC ducts 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 | Adjustable (2.5V setpoint), 0.5% initial accuracy, 100ppm/°C tempco, SOT23-3 | Requires external resistor divider; less accurate and less stable over temperature | Select when adjustable output or cost sensitivity outweighs precision requirements |
| ADR3440ARJZ-R7 | 4.096V, 0.1% accuracy, 10ppm/°C tempco, but 3.5mA quiescent current, SOT23-5 | Series topology requires minimum load current; higher power consumption limits battery life | Prefer for systems needing lower tempco and can support continuous 3.5mA supply |
Compared with TLVH431AIDBZR and ADR3440ARJZ-R7, LM4050AIX3-4.1 delivers superior micropower operation (73µA min), tighter tempco consistency, and true two-terminal simplicity-making it optimal for space-constrained, long-life, high-accuracy analog subsystems.
Availability
LM4050AIX3-4.1 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and medical wearables requiring stable component supply with full temperature-range validation and RoHS-compliant sourcing.
Supply support for LM4050AIX3-4.1 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.
The LM4050/LM4051 product line delivers micropower, high-accuracy shunt references optimized for space-constrained, battery-operated, and wide-temperature systems where stability and minimal external components are critical.
FAQ
What is the minimum operating current for LM4050AIX3-4.1?
The LM4050AIX3-4.1 requires a minimum shunt current of 73µA to maintain regulation and specified accuracy across its full -40°C to +125°C temperature range. Below this threshold, output voltage may deviate beyond the ±0.1% initial tolerance, especially at temperature extremes. This value is confirmed in the Electrical Characteristics table for the 4.096V variant under "Minimum Operating Current" (IRMIN).
Does LM4050AIX3-4.1 require an external output capacitor?
No, LM4050AIX3-4.1 does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load-from 0pF to several µF-eliminating the need for compensation components and reducing BOM count. This behavior is explicitly stated in both the General Description and Applications Information sections of the datasheet.
What is the pin configuration and package type of LM4050AIX3-4.1?
LM4050AIX3-4.1 uses a 3-pin SC70 package (1.8mm × 1.8mm). Pin 1 is the anode (+), Pin 2 is the cathode (−), and Pin 3 is NC (no connection), which must be left floating or tied to Pin 2. This configuration is shown in the "Pin Configuration" diagram and confirmed in the "Pin Description" table of the datasheet.
How does LM4050AIX3-4.1 perform under capacitive loading?
LM4050AIX3-4.1 is fully stable with arbitrary capacitive loads-no ringing, overshoot, or oscillation occurs. This capability is inherent to its shunt topology and internal compensation, allowing direct connection to ADC reference inputs, filter capacitors, or noisy digital supply rails without external isolation. The datasheet explicitly states "Tolerates Capacitive Loads" in the Features list and confirms stability across all tested COUT values.
What is the wideband noise specification of LM4050AIX3-4.1?
The LM4050AIX3-4.1 exhibits 64µVRMS wideband noise over the 10Hz to 10kHz frequency range, measured at 100µA shunt current. This noise level supports high-fidelity analog measurements in 16-bit data acquisition systems without requiring additional low-noise filtering stages, as verified in the "ELECTRICAL CHARACTERISTICS-4.096V" section of the datasheet.
LM4050AIX3-4.1 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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 64µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4050AIX3-4.1 FAQ
1.How can I place an order for LM4050AIX3-4.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AIX3-4.1 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 LM4050AIX3-4.1 reliable?
The price and inventory of LM4050AIX3-4.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AIX3-4.1 is usually 5 days.
3.What payment methods are accepted for LM4050AIX3-4.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AIX3-4.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AIX3-4.1?
LM4050AIX3-4.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AIX3-4.1 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 LM4050AIX3-4.1?
For technical support, including LM4050AIX3-4.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AIX3-4.1 requirements.
6.How does Aetrix verify that LM4050AIX3-4.1 is sourced from the original manufacturer or authorized distributors?
All LM4050AIX3-4.1 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 LM4050AIX3-4.1 meets industry standards.
7.What is the process for return or replacement of LM4050AIX3-4.1?
All LM4050AIX3-4.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AIX3-4.1, 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 LM4050AIX3-4.1 part is unused and in its original packaging.
Return procedure for LM4050AIX3-4.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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