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Analog Devices Inc./Maxim Integrated LM4050BIX3-4.1-T
- Part No.:
- LM4050BIX3-4.1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050BIX3-4.1-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
LM4050BIX3-4.1-T from Maxim Integrated is a precision 4.096V, two-terminal shunt voltage reference in SC70-3 package, featuring 0.2% 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 in ADC/DAC biasing, portable instrumentation, and battery-powered sensor signal chains.
For engineers reviewing the LM4050BIX3-4.1-T datasheet, LM4050BIX3-4.1-T pinout, LM4050BIX3-4.1-T application, or LM4050BIX3-4.1-T equivalent, this page delivers verified electrical specs, SC70-3 terminal mapping, real-world use cases, and validated alternative options for high-accuracy analog design.
Technical Context
The LM4050BIX3-4.1-T implements a laser-trimmed bandgap core with BiCMOS process, delivering fixed 4.096V reverse breakdown voltage without requiring external stabilization capacitors. Its dynamic impedance remains ≤1.0Ω at 1mA, enabling stable regulation across load transients and capacitive output conditions.
Guaranteed over –40°C to +125°C, it maintains ±8.2mV total tolerance (0.2% grade) and exhibits <10mV reverse voltage shift across 1–15mA shunt current range - critical for precision data acquisition systems where supply headroom and thermal drift must be tightly controlled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; enables exact 12-bit full-scale scaling with 5V VREF in SAR ADCs. |
| Initial Accuracy | ±8.2mV (0.2% grade); eliminates need for system-level calibration in industrial sensors. |
| Tempco | ±15ppm/°C max; contributes ≤±1.2mV drift over –40°C to +125°C ambient. |
| Shunt Current Range | 73µA to 15mA; supports micropower sleep modes and high-speed DAC settling simultaneously. |
| Output Noise | 64µVRMS (10Hz–10kHz); preserves ENOB in 16-bit ADC front-ends without filtering overhead. |
| Dynamic Impedance | ≤1.0Ω at 1mA; ensures <1mV load-regulation error under 10mA step changes. |
| Long-Term Stability | 120ppm over 1000h; meets 10-year field reliability requirements for medical diagnostics. |
Pinout & Package
LM4050BIX3-4.1-T uses the 3-pin SC70-3 surface-mount package (1.8mm × 1.8mm), optimized for space-constrained PCB layouts. Pin 3 is unconnected (N.C.) and must remain floating or tied to Pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode / Positive Reference Terminal | Connects to system ground or low-impedance return path; defines reference potential node. |
| Pin 2 (−) | Cathode / Negative Reference Terminal | Receives shunt current from series resistor; voltage develops across Pins 1–2. |
| Pin 3 (N.C.) | No Connection | Must be left unconnected or shorted to Pin 2; not internally bonded - floating state avoids parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 50% smaller than SOT23-3; saves >0.8mm² board area in wearables and IoT nodes. |
| No output capacitor required | Stable with any capacitive load up to 10µF; eliminates BOM cost and layout sensitivity. |
| Wide shunt-current capability | Operates down to 73µA quiescent current; extends battery life in always-on sensor monitors. |
| Tolerant of capacitive loads | Maintains phase margin >45° with 1µF ceramic output cap; prevents oscillation in noisy environments. |
| Laser-trimmed accuracy | 0.2% grade achieved via on-die resistor trimming; avoids post-assembly calibration labor. |
Applications
| Portable Data Loggers | Industrial 4–20mA Transmitters |
|---|---|
|
Use Scenario: Battery-powered environmental sensor node logging temperature/humidity at 10s intervals. IC Role / Device Role / Timing Role: Provides stable 4.096V reference for 12-bit SAR ADC and microcontroller VREF input. Use Value: Enables ±0.5°C measurement accuracy over –20°C to +70°C ambient without recalibration. |
Use Scenario: Loop-powered transmitter converting RTD readings to 4–20mA output in factory automation. IC Role / Device Role / Timing Role: Supplies precision reference for DAC and current-sense amplifier offset correction. Use Value: Maintains <±0.1% full-scale error across –40°C to +85°C operating range and 15-year service life. |
| Medical Pulse Oximeters | Smart Energy Meters |
|
Use Scenario: Wearable oximeter using dual-wavelength photodiode signals digitized by low-noise ADC. IC Role / Device Role / Timing Role: Low-noise 4.096V reference for ADC front-end and LED driver bias control. Use Value: 64µVRMS noise ensures ≥15.5 ENOB, supporting SpO₂ resolution to 0.1%. |
Use Scenario: Revenue-grade electricity meter measuring voltage/current with metrology-grade ADCs. IC Role / Device Role / Timing Role: Primary reference for 24-bit sigma-delta ADC and anti-aliasing filter calibration. Use Value: ±120ppm long-term stability satisfies IEC 62053-21 Class 0.2 accuracy certification. |
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 1.24V–18V output; 0.5% initial accuracy; 100ppm/°C tempco; SOT23-3 package. | Requires external resistors for 4.096V setting; higher tempco increases drift in wide-temp industrial use. | Select only if adjustable output or cost sensitivity outweighs precision and thermal stability needs. |
| ADR3440ARJZ-R7 | Fixed 4.096V; 0.1% initial accuracy; ±10ppm/°C tempco; 50µVRMS noise; SOT23-5 package. | Higher pin count (5-pin) and larger footprint; requires bypass capacitor for stability. | Choose when tighter initial accuracy and lower noise justify added layout complexity and BOM cost. |
Compared with LM4050BIX3-4.1-T, TLVH431ACDBVR trades precision and thermal stability for configurability, while ADR3440ARJZ-R7 improves accuracy and noise at the cost of board space and external component dependency.
Availability
LM4050BIX3-4.1-T is available at Aetrix Electronics and suitable for portable instrumentation, industrial 4–20mA transmitters, and medical sensor modules requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for LM4050BIX3-4.1-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 high-performance analog and mixed-signal ICs for precision, power, and interface applications, with emphasis on reliability and miniaturization.
The LM4050/LM4051 family was developed to deliver ultra-stable, micropower shunt references in subminiature packages for space- and power-constrained systems such as handheld test equipment and remote sensors.
FAQ
What is the guaranteed operating temperature range for LM4050BIX3-4.1-T?
The LM4050BIX3-4.1-T is fully specified and guaranteed over –40°C to +125°C ambient temperature. All electrical parameters - including output voltage, tempco, and dynamic impedance - are tested and warranted across this full industrial range, making LM4050BIX3-4.1-T suitable for under-hood automotive sensors and outdoor industrial controllers.
Can LM4050BIX3-4.1-T operate without an output capacitor?
Yes, LM4050BIX3-4.1-T is internally compensated and does not require an output capacitor for stability. It remains stable with any capacitive load from 0 to 10µF, eliminating capacitor-related BOM cost, footprint, and aging concerns - a key advantage over many series references that mandate minimum 1µF bypass caps.
What is the minimum shunt current required for regulation in LM4050BIX3-4.1-T?
The LM4050BIX3-4.1-T requires a minimum shunt current of 73µA to maintain regulation at 4.096V. This value is derived from the datasheet's IRMIN specification for the 4.096V B-grade device and ensures stable operation even in ultra-low-power sleep modes of battery-operated systems.
How does the N.C. pin (Pin 3) function in LM4050BIX3-4.1-T?
Pin 3 of LM4050BIX3-4.1-T is a no-connect terminal with no internal bond wire. The datasheet explicitly states it must be left floating or connected to Pin 2 (cathode). Leaving it unconnected avoids unintended coupling; tying it to Pin 2 ensures mechanical robustness without affecting electrical performance.
Is LM4050BIX3-4.1-T compatible with lead-free reflow processes?
Yes, LM4050BIX3-4.1-T is supplied in a lead-free/RoHS-compliant SC70-3 package rated for standard Pb-free reflow profiles (JEDEC J-STD-020). Its maximum junction temperature is +150°C, and the package supports peak reflow temperatures up to +260°C for 10 seconds - fully compliant with industry-standard manufacturing requirements.
LM4050BIX3-4.1-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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- 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
LM4050BIX3-4.1-T FAQ
1.How can I place an order for LM4050BIX3-4.1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BIX3-4.1-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 LM4050BIX3-4.1-T reliable?
The price and inventory of LM4050BIX3-4.1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BIX3-4.1-T is usually 5 days.
3.What payment methods are accepted for LM4050BIX3-4.1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BIX3-4.1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BIX3-4.1-T?
LM4050BIX3-4.1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BIX3-4.1-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 LM4050BIX3-4.1-T?
For technical support, including LM4050BIX3-4.1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BIX3-4.1-T requirements.
6.How does Aetrix verify that LM4050BIX3-4.1-T is sourced from the original manufacturer or authorized distributors?
All LM4050BIX3-4.1-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 LM4050BIX3-4.1-T meets industry standards.
7.What is the process for return or replacement of LM4050BIX3-4.1-T?
All LM4050BIX3-4.1-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BIX3-4.1-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 LM4050BIX3-4.1-T part is unused and in its original packaging.
Return procedure for LM4050BIX3-4.1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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