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Analog Devices Inc./Maxim Integrated LM4050BIX3-3.0-T
- Part No.:
- LM4050BIX3-3.0-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050BIX3-3.0-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
LM4050BIX3-3.0-T from Maxim Integrated is a precision 3.000V, two-terminal shunt voltage reference in SC70-3 package, featuring ±6.0mV initial tolerance (0.2% grade), ±15ppm/°C temperature coefficient over –40°C to +125°C, 67µA minimum operating current, and 45µVRMS wideband noise (10Hz–10kHz). It serves as a stable reference for ADCs, DACs, and sensor signal conditioning in portable battery-powered systems.
For engineers reviewing the LM4050BIX3-3.0-T datasheet, LM4050BIX3-3.0-T pinout, LM4050BIX3-3.0-T application, or LM4050BIX3-3.0-T equivalent, this page delivers verified electrical specs, SC70-3 terminal mapping, real-world use cases in industrial controls and mobile devices, and validated alternative parts with documented performance trade-offs.
Technical Context
The LM4050BIX3-3.0-T uses a laser-trimmed bandgap core to maintain a fixed reverse breakdown voltage across its anode and cathode terminals. Its internal BiCMOS architecture enables stable regulation without external capacitors while tolerating any output capacitance.
It operates as a two-terminal shunt device: reverse current (67µA–15mA) flows from cathode to anode to clamp the voltage at 3.000V ±6.0mV at +25°C, with dynamic impedance ≤0.8Ω at 1mA and long-term stability of 120ppm over 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V ±6.0mV at +25°C - defines reference accuracy for 12-bit ADC biasing and sensor excitation circuits. |
| Initial Accuracy Grade | B grade (0.2%) - guarantees tighter tolerance than C grade (0.5%), enabling higher-resolution measurement systems. |
| Temperature Coefficient | ±15ppm/°C (max) - ensures <±0.7mV drift over –40°C to +125°C, critical for automotive and industrial environments. |
| Operating Current Range | 67µA to 15mA - supports ultra-low-power sensor nodes and high-current analog front-ends without external buffering. |
| Wideband Noise | 45µVRMS (10Hz–10kHz) - limits added noise in precision data acquisition paths, especially with 16-bit+ converters. |
| Dynamic Impedance | ≤0.8Ω at 1mA - maintains voltage stability under fast load transients, e.g., during SAR ADC sampling bursts. |
| Long-Term Stability | 120ppm over 1000h - reduces calibration frequency in field-deployed instrumentation and medical devices. |
Pinout & Package
LM4050BIX3-3.0-T is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is unconnected (N.C.) and must be left floating or tied to pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode (positive terminal) | Connects to system ground or low-impedance return path; forms cathode-to-anode shunt path for regulation. |
| Pin 2 (−) | Cathode (negative terminal) | Reference output node; voltage is clamped to 3.000V relative to pin 1 when reverse-biased with ≥67µA. |
| Pin 3 (N.C.) | No connection | Must remain unconnected or shorted to pin 2; no internal circuitry-violating this risks parametric shift or failure. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 package | 1.8mm × 1.8mm footprint - enables placement in space-constrained wearables and multi-channel sensor modules. |
| No output capacitor required | Stable with any capacitive load - eliminates BOM cost and layout area for decoupling caps in battery-powered designs. |
| Wide shunt current range | 67µA to 15mA operation - accommodates both micropower IoT sensors and high-speed data converters without redesign. |
| Low dynamic impedance | ≤0.8Ω at 1mA - minimizes voltage droop during transient load steps, preserving reference integrity in switched-capacitor circuits. |
| Laser-trimmed accuracy | 0.2% initial tolerance - achieves 12-bit effective resolution without post-manufacturing calibration. |
Applications
| Portable Medical Sensors | Industrial Process Transmitters |
|---|---|
|
Use Scenario: Battery-powered glucose meters and pulse oximeters requiring stable excitation for electrochemical and photodiode sensing. IC Role / Device Role / Timing Role: Shunt reference providing 3.000V bias to analog front-end op-amps and 14-bit SAR ADCs. Use Value: ±6.0mV initial error and ±15ppm/°C drift ensure <±0.5% full-scale error over temperature, meeting ISO 13485 clinical accuracy requirements. |
Use Scenario: 4–20mA loop-powered pressure and temperature transmitters operating in harsh factory environments. IC Role / Device Role / Timing Role: Precision voltage reference for DAC output scaling and sensor bridge excitation in HART-enabled devices. Use Value: 120ppm long-term stability reduces annual recalibration needs; SC70 package withstands reflow and vibration in DIN-rail enclosures. |
| Notebook Computer Power Monitoring | Automotive Cabin Controller Reference |
|
Use Scenario: Real-time battery voltage and rail monitoring in ultrabooks using integrated power management ICs. IC Role / Device Role / Timing Role: Stable 3.000V reference for fuel-gauge ADCs and system voltage supervisors. Use Value: 45µVRMS noise floor prevents false low-battery triggers; operation down to 67µA extends runtime in sleep modes. |
Use Scenario: HVAC and infotainment subsystems in vehicles requiring AEC-Q200-compliant references. IC Role / Device Role / Timing Role: Shunt reference for microcontroller ADC inputs measuring thermistor and potentiometer feedback. Use Value: Guaranteed operation from –40°C to +125°C ambient enables direct PCB mounting near heat sources 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 |
|---|---|---|---|
| TL4050B30IDBZR | Same 3.0V output and 0.2% grade, but ±50ppm/°C tempco (vs. ±15ppm/°C), 60µA min current, 40µVRMS noise. | Higher tempco limits use in extended-temperature industrial sensors; lower noise suits audio-grade references. | Select TL4050B30IDBZR only if cost sensitivity outweighs thermal drift requirements and SC70-3 footprint compatibility is confirmed. |
| ADR3430ARJZ-R7 | 3.0V series reference (not shunt); requires 100µA supply current, ±10ppm/°C tempco, 30µVRMS noise, SOT23-5 package. | Series topology demands dedicated supply rail; unsuitable for high-side sensing or current-limited shunt configurations. | Choose ADR3430ARJZ-R7 only when low-noise, ultra-stable series regulation is needed and board space allows SOT23-5 layout. |
Compared with TL4050B30IDBZR and ADR3430ARJZ-R7, LM4050BIX3-3.0-T uniquely combines SC70-3 size, shunt topology, ±15ppm/°C stability, and capacitor-free operation-making it optimal for space- and power-constrained 2-wire sensor interfaces where layout simplicity is critical.
Availability
LM4050BIX3-3.0-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial process transmitters, notebook computer power monitoring, and automotive cabin controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050BIX3-3.0-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 demanding industrial, medical, and communications applications, emphasizing low-power, high-accuracy, and small-footprint solutions.
The LM4050/LM4051 family was developed specifically for space-critical, battery-operated systems needing stable shunt references without external compensation-targeting portable instrumentation, sensor nodes, and energy-harvesting platforms.
FAQ
What is the guaranteed operating temperature range for LM4050BIX3-3.0-T?
The LM4050BIX3-3.0-T is fully specified and production-tested over –40°C to +125°C ambient temperature. All key parameters-including output voltage, temperature coefficient, and dynamic impedance-are guaranteed across this range per Maxim's datasheet Section "ELECTRICAL CHARACTERISTICS-3.000V" and Absolute Maximum Ratings table.
Can LM4050BIX3-3.0-T be used without an output capacitor?
Yes. The LM4050BIX3-3.0-T is internally compensated and stable with any capacitive load, including zero output capacitance. This is explicitly stated in the General Description and Applications Information sections, eliminating the need for external stabilization capacitors in all standard configurations.
What is the minimum shunt current required for regulation in LM4050BIX3-3.0-T?
The LM4050BIX3-3.0-T requires a minimum shunt current of 67µA to maintain regulation at 3.000V. This value is specified in the "ELECTRICAL CHARACTERISTICS-3.000V" table under "Minimum Operating Current (IRMIN)" for the B grade device and applies across the full –40°C to +125°C temperature range.
How does the pin configuration of LM4050BIX3-3.0-T differ from SOT23 versions?
LM4050BIX3-3.0-T uses the SC70-3 package with identical pin 1 (+), pin 2 (−), and pin 3 (N.C.) assignment as SOT23 variants-but pin 3 must remain unconnected or tied to pin 2. Unlike some SOT23 references, no functional difference exists between packages; only footprint and thermal resistance differ.
Is LM4050BIX3-3.0-T RoHS-compliant and lead-free?
Yes. The "+T" suffix in LM4050BIX3-3.0-T denotes tape-and-reel packaging and confirms RoHS compliance and lead-free construction, as noted in the Ordering Information section ("+Denotes a lead(pb)-free/RoHS-compliant package"). This is verified in Maxim's official package documentation (Document No. 21-0075).
LM4050BIX3-3.0-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:
- ±0.2%
- 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
LM4050BIX3-3.0-T FAQ
1.How can I place an order for LM4050BIX3-3.0-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BIX3-3.0-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 LM4050BIX3-3.0-T reliable?
The price and inventory of LM4050BIX3-3.0-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BIX3-3.0-T is usually 5 days.
3.What payment methods are accepted for LM4050BIX3-3.0-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BIX3-3.0-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BIX3-3.0-T?
LM4050BIX3-3.0-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BIX3-3.0-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 LM4050BIX3-3.0-T?
For technical support, including LM4050BIX3-3.0-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BIX3-3.0-T requirements.
6.How does Aetrix verify that LM4050BIX3-3.0-T is sourced from the original manufacturer or authorized distributors?
All LM4050BIX3-3.0-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 LM4050BIX3-3.0-T meets industry standards.
7.What is the process for return or replacement of LM4050BIX3-3.0-T?
All LM4050BIX3-3.0-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BIX3-3.0-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 LM4050BIX3-3.0-T part is unused and in its original packaging.
Return procedure for LM4050BIX3-3.0-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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