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Analog Devices Inc./Maxim Integrated LM4050BIX3-2.1
- Part No.:
- LM4050BIX3-2.1
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050BIX3-2.1.pdf
- Description:
- LM4050 50PPM PER DEGREE CELSIUS
- Quantity:
- Payment:
- Shipping:
Inventory:1,960
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Product details
Overview
LM4050BIX3-2.1 from Maxim Integrated is a precision 2.048V shunt voltage reference in SC70-3 package, featuring 0.2% initial accuracy, ±15ppm/°C temperature coefficient over –40°C to +125°C, 60µA–15mA operating current range, and 28µVRMS wideband noise (10Hz–10kHz). It serves as a stable reference in portable battery-powered systems requiring micropower operation and space-constrained PCB layouts.
For engineers reviewing the LM4050BIX3-2.1 datasheet, LM4050BIX3-2.1 pinout, LM4050BIX3-2.1 application, or LM4050BIX3-2.1 equivalent, key selection criteria include guaranteed reverse breakdown voltage tolerance across temperature, no-output-capacitor stability, low dynamic impedance (≤0.8Ω), and compatibility with capacitive loads in high-precision ADC/DAC biasing and sensor excitation circuits.
Technical Context
The LM4050BIX3-2.1 uses a laser-trimmed bandgap core to deliver fixed 2.048V reverse breakdown voltage with tight initial tolerance and low thermal drift. Its two-terminal shunt architecture sinks current through an external series resistor to maintain regulation-no feedback loop or external components required.
It operates without output capacitance and remains stable under any capacitive load condition. The device's dynamic impedance of ≤0.8Ω at 1mA ensures minimal voltage shift across its 60µA–15mA shunt current range, supporting consistent reference performance in varying load and supply conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V nominal; ±4.0mV max tolerance at +25°C (B-grade), enabling precise 12-bit DAC/ADC full-scale calibration. |
| Initial Accuracy | ±0.2% (20mV) at +25°C; guarantees reference error before temperature or aging effects. |
| 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 min to 15mA max; supports ultra-low-power IoT nodes and high-current precision data acquisition simultaneously. |
| Dynamic Impedance | ≤0.8Ω at 1mA; limits voltage variation to ≤0.8mV per 1mA load change, ensuring stability in dynamic current-sink applications. |
| Output Noise | 28µVRMS (10Hz–10kHz); low enough for 16-bit SAR ADC reference without additional filtering. |
| Long-Term Stability | 120ppm over 1000h; predicts <0.012% output drift after one year of continuous operation. |
Pinout & Package
LM4050BIX3-2.1 is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23-3, optimized for space-critical portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode / Positive Terminal | Connected to system ground or low-impedance return path; forms cathode-to-anode reverse bias path. |
| 2 (−) | Cathode / Negative Terminal | Reference output node; voltage measured between Pin 2 and Pin 1; sinks shunt current into this terminal. |
| 3 (N.C.) | No Connection | Must be left floating or tied to Pin 2; not internally connected-ensures no parasitic leakage paths affect accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 package | 1.8mm × 1.8mm footprint enables placement in dense portable PCBs where SOT23-3 is prohibitive. |
| No output capacitor required | Guaranteed stability with any capacitive load eliminates BOM cost, layout area, and reliability risk from external C. |
| Wide shunt current range | 60µA–15mA operation allows use from nanoamp sensor biasing to 10-bit DAC reference without redesign. |
| Low 28µVRMS noise | Enables direct coupling to high-resolution ADCs without post-regulation filtering or LDO buffering. |
| Guaranteed –40°C to +125°C operation | Validated performance across automotive under-hood and industrial process control ambient extremes. |
Applications
| Portable Medical Sensors | Industrial Data Acquisition |
|---|---|
Use Scenario: Battery-powered handheld glucose meter with 16-bit sigma-delta ADC measuring electrochemical current. IC Role / Device Role / Timing Role: Provides stable 2.048V reference for ADC full-scale calibration and sensor biasing circuitry. Use Value: 0.2% initial accuracy and ±15ppm/°C tempco ensure <±3 LSB error over temperature, meeting ISO 15197 clinical accuracy requirements. | Use Scenario: 4–20mA loop-powered transmitter conditioning analog sensor signals in factory automation. IC Role / Device Role / Timing Role: Supplies precision reference for 12-bit DAC generating loop current setpoint and for ratiometric sensor signal conditioning. Use Value: Micropower 60µA minimum operating current extends loop compliance margin; SC70 size fits compact DIN-rail module layouts. |
| Wireless IoT Node | Test & Measurement Equipment |
Use Scenario: Sub-GHz LPWAN sensor node with intermittent wake-up, measuring temperature/humidity with integrated ADC. IC Role / Device Role / Timing Role: Powers ADC reference rail during active measurement bursts; remains biased at microamp level during sleep. Use Value: Stable 2.048V output enables consistent 12-bit conversion across battery voltage decay (2.2V–3.6V), eliminating gain recalibration. | Use Scenario: Benchtop multimeter front-end using dual-slope integration with precision voltage reference. IC Role / Device Role / Timing Role: Delivers low-noise, thermally stable reference for integrator capacitor charging and zero-reference comparison. Use Value: 28µVRMS noise and <0.8Ω dynamic impedance prevent integration drift and improve 5½-digit measurement repeatability. |
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 1.24V–18V output; 0.5% initial accuracy; higher 200µA min current; SOT23-3 only. | Requires two external resistors for 2.048V setting; less accurate and noisier (80µVRMS). | Choose when adjustable output or higher voltage capability is needed; avoid for fixed-accuracy 2.048V systems. |
| REF3020AIDBZR | 2.048V series reference; 0.2% accuracy; 50ppm/°C tempco; 50µA quiescent; SOT23-3. | Series topology requires load current sourcing; incompatible with shunt-based bias networks. | Select only if system design permits series reference topology and load current exceeds 50µA; not drop-in compatible. |
Compared with TLVH431AIDBZR and REF3020AIDBZR, the LM4050BIX3-2.1 delivers superior noise performance (28µVRMS vs. ≥80µVRMS), true fixed 2.048V output without resistor tuning, and proven shunt stability with any capacitive load-making it optimal for space-constrained, low-noise, fixed-voltage reference applications.
Availability
LM4050BIX3-2.1 is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition modules, wireless IoT nodes, and test & measurement equipment requiring stable component supply and long-term parametric consistency.
Supply support for LM4050BIX3-2.1 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, medical, and communications applications.
The LM4050/LM4051 product line delivers micropower shunt references optimized for space-constrained, battery-operated systems needing high accuracy, low noise, and guaranteed operation across –40°C to +125°C.
FAQ
What is the exact output voltage tolerance of LM4050BIX3-2.1 at +25°C?
The LM4050BIX3-2.1 has a reverse breakdown voltage of 2.048V with a maximum tolerance of ±4.0mV (±0.2%) at +25°C, as specified for the B-grade variant in the Electrical Characteristics table for 2.048V devices. This tolerance is laser-trimmed and production-tested.
Does LM4050BIX3-2.1 require an external output capacitor for stability?
No, the LM4050BIX3-2.1 does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including 0µF-eliminating BOM cost and board space while simplifying layout for high-reliability applications.
What is the minimum operating current for LM4050BIX3-2.1, and why is it important?
The LM4050BIX3-2.1 requires a minimum shunt current of 60µA to maintain regulation. Below this threshold, the device exits its specified reverse breakdown region and output voltage becomes uncontrolled-critical for ultra-low-power sleep modes where bias current must be carefully budgeted.
How does the temperature coefficient of LM4050BIX3-2.1 impact system accuracy over –40°C to +125°C?
The LM4050BIX3-2.1 has a guaranteed temperature coefficient of ±15ppm/°C. Over the full –40°C to +125°C range (ΔT = 165°C), this contributes up to ±2.475mV (±0.12%) drift relative to its 2.048V nominal output-enabling predictable error budgeting in industrial and automotive environments.
Can LM4050BIX3-2.1 be used in place of LM4050BEM3-2.1?
Yes, the LM4050BIX3-2.1 is functionally identical to LM4050BEM3-2.1 except for package: both share 2.048V output, 0.2% accuracy, and –40°C to +125°C rating. The X3 (SC70-3) offers 50% smaller footprint than EM3 (SOT23-3), but pinout and electrical behavior are identical-making it a direct physical and electrical replacement where board space permits.
LM4050BIX3-2.1 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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- 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
LM4050BIX3-2.1 FAQ
1.How can I place an order for LM4050BIX3-2.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BIX3-2.1 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 LM4050BIX3-2.1 reliable?
The price and inventory of LM4050BIX3-2.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BIX3-2.1 is usually 5 days.
3.What payment methods are accepted for LM4050BIX3-2.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BIX3-2.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BIX3-2.1?
LM4050BIX3-2.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BIX3-2.1 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 LM4050BIX3-2.1?
For technical support, including LM4050BIX3-2.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BIX3-2.1 requirements.
6.How does Aetrix verify that LM4050BIX3-2.1 is sourced from the original manufacturer or authorized distributors?
All LM4050BIX3-2.1 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 LM4050BIX3-2.1 meets industry standards.
7.What is the process for return or replacement of LM4050BIX3-2.1?
All LM4050BIX3-2.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BIX3-2.1, 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 LM4050BIX3-2.1 part is unused and in its original packaging.
Return procedure for LM4050BIX3-2.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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