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Analog Devices Inc./Maxim Integrated LM4051BIX3-1.2
- Part No.:
- LM4051BIX3-1.2
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4051BIX3-1.2.pdf
- Description:
- LM4051 50PPM PER DEGREE CELSIUS
- Quantity:
- Payment:
- Shipping:
Inventory:1,668
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Product details
Overview
LM4051BIX3-1.2 from Maxim Integrated is a precision 1.225V shunt voltage reference in SC70-3 package, featuring ±0.2% initial accuracy, 50ppm/°C max temperature coefficient, and 60µA to 15mA operating current range. It delivers stable reverse breakdown voltage for ADC/DAC biasing, sensor excitation, and portable battery-powered instrumentation.
For engineers reviewing the LM4051BIX3-1.2 datasheet, LM4051BIX3-1.2 pinout, LM4051BIX3-1.2 application, or LM4051BIX3-1.2 equivalent, this page provides verified specifications, validated pin functions, real-world use cases in space-constrained systems, and confirmed alternative options for voltage reference selection.
Technical Context
The LM4051BIX3-1.2 operates as a two-terminal bandgap shunt reference, maintaining a fixed 1.225V output across its anode and cathode when reverse-biased with 60µA–15mA current. Its internal laser-trimmed resistor network ensures tight initial tolerance without external calibration.
It exhibits low dynamic impedance (≤1.5Ω at 1mA), 28µVRMS wideband noise (10Hz–10kHz), and guaranteed stability over −40°C to +125°C - all without requiring output capacitors, even under capacitive loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V nominal; ±0.2% initial accuracy (±2.4mV) at +25°C |
| Tempco | 50ppm/°C max over −40°C to +125°C; ensures ≤±6.1mV drift across full range |
| Operating Current | 60µA minimum to 15mA maximum; enables micropower operation and high-current regulation |
| Dynamic Impedance | ≤1.5Ω at 1mA; maintains voltage stability under load transients |
| Output Noise | 28µVRMS (10Hz–10kHz); suitable for high-resolution 16-bit+ data converters |
| Long-Term Stability | 120ppm after 1000h; supports reliable performance in field-deployed equipment |
Pinout & Package
LM4051BIX3-1.2 uses the 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is no-connect and must be left floating or tied to pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode (positive terminal) | Connects to system ground or low-impedance return path; current sinks into this node |
| 2 (−) | Cathode (negative terminal) | Reference output node; voltage measured between pin 2 and pin 1 |
| 3 (N.C.) | No connection | Must remain unconnected or shorted to pin 2; no internal functionality |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves PCB space in portable and wearable designs |
| No output capacitor required | Stable with any capacitive load; eliminates BOM cost and layout sensitivity |
| Wide shunt current range | 60µA–15mA operation supports both ultra-low-power sleep modes and active high-accuracy measurement |
| Guaranteed temp range | Specified from −40°C to +125°C; qualified for industrial and automotive under-hood applications |
| Laser-trimmed accuracy | ±0.2% initial tolerance achieved via on-die trimming - no external calibration needed |
Applications
| Portable Medical Sensors | Industrial Data Acquisition |
|---|---|
Use Scenario: Battery-powered handheld blood glucose meter requiring stable excitation for electrochemical strip sensing. IC Role / Device Role / Timing Role: Shunt reference providing precise 1.225V bias to analog front-end op-amp and ADC reference input. Use Value: Enables <12-bit effective resolution with <±0.5% full-scale error over temperature and battery discharge. | Use Scenario: 4–20mA loop-powered transmitter in factory automation with wide ambient temperature swings. IC Role / Device Role / Timing Role: Precision voltage reference for DAC output scaling and sensor signal conditioning circuitry. Use Value: Maintains <0.2% output accuracy across −40°C to +85°C without recalibration or thermal compensation. |
| Wearable Health Monitors | Automotive Cabin Sensors |
Use Scenario: Compact ECG patch using ultra-low-quiescent-current analog signal chain. IC Role / Device Role / Timing Role: Micropower shunt reference supplying stable bias to instrumentation amplifier and SAR ADC. Use Value: Draws only 60µA minimum current, extending coin-cell battery life beyond 6 months. | Use Scenario: Occupant detection module inside vehicle seat cushion with limited board area. IC Role / Device Role / Timing Role: Reference source for thermistor-based temperature sensing and humidity IC calibration. Use Value: SC70-3 footprint fits within 2.0mm² board area; 125°C rating survives under-seat thermal environment. |
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 min), 0.5% initial accuracy, 90ppm/°C tempco, SOT23-3 | Requires external resistors for 1.225V setting; higher tempco reduces accuracy over temperature | Choose if adjustable output or cost-sensitive design outweighs precision and size requirements |
| REF3012AIDBZR | Fixed 1.25V, 0.2% accuracy, 50ppm/°C, SC70-3, but 100µA min operating current | Slightly higher output (1.25V vs. 1.225V); incompatible where exact 1.225V is required (e.g., legacy sensor bridges) | Select when 1.25V is acceptable and lower noise (25µVRMS) is prioritized over micropower startup |
Compared with TLVH431AIDBZR and REF3012AIDBZR, LM4051BIX3-1.2 uniquely delivers exact 1.225V output, 60µA minimum current, and SC70-3 footprint - making it optimal for space-constrained, battery-operated systems requiring metrology-grade voltage stability without external components.
Availability
LM4051BIX3-1.2 is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition, and wearable health monitors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4051BIX3-1.2 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 shunt voltage references optimized for space-constrained, battery-operated systems needing high accuracy and wide temperature operation without external stabilization.
FAQ
What is the exact output voltage and tolerance of LM4051BIX3-1.2?
The LM4051BIX3-1.2 has a nominal reverse breakdown voltage of 1.225V with ±0.2% initial accuracy (±2.4mV) at +25°C. Over the full −40°C to +125°C range, total tolerance remains within ±0.7% due to its 50ppm/°C max temperature coefficient - verified per Maxim's datasheet Electrical Characteristics table for LM4051B grade.
Can LM4051BIX3-1.2 operate at 60µA minimum current, and is that guaranteed across temperature?
Yes, LM4051BIX3-1.2 guarantees stable regulation down to 60µA minimum shunt current across its full operating temperature range (−40°C to +125°C). This is explicitly specified in the Absolute Maximum Ratings and Electrical Characteristics tables, enabling true micropower operation in sleep-mode circuits.
Does LM4051BIX3-1.2 require an output capacitor for stability?
No, LM4051BIX3-1.2 does not require an external output capacitor. Its internal design ensures stability with any capacitive load - including direct connection to ADC reference inputs or op-amp feedback networks - eliminating layout sensitivity and reducing BOM count.
What is the function of pin 3 on LM4051BIX3-1.2, and how must it be handled?
Pin 3 on LM4051BIX3-1.2 is labeled N.C. (no connection) and must be left floating or connected to pin 2 (cathode). It serves no internal function; tying it to pin 2 avoids potential floating-node noise or ESD concerns while maintaining full device specification compliance.
How does LM4051BIX3-1.2 compare to LM4050 variants in terms of voltage options and package?
LM4051BIX3-1.2 is the 1.225V variant in SC70-3 package; LM4050 offers 2.048V–5.000V options in same SC70-3 or SOT23-3 packages. The "LM4051" prefix specifically denotes the 1.225V version - distinct in bandgap architecture and laser trim - and is not interchangeable with LM4050 series despite shared features and pinout.
LM4051BIX3-1.2 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):
- 1.225V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 60 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4051BIX3-1.2 FAQ
1.How can I place an order for LM4051BIX3-1.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4051BIX3-1.2 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 LM4051BIX3-1.2 reliable?
The price and inventory of LM4051BIX3-1.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4051BIX3-1.2 is usually 5 days.
3.What payment methods are accepted for LM4051BIX3-1.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4051BIX3-1.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4051BIX3-1.2?
LM4051BIX3-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4051BIX3-1.2 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 LM4051BIX3-1.2?
For technical support, including LM4051BIX3-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4051BIX3-1.2 requirements.
6.How does Aetrix verify that LM4051BIX3-1.2 is sourced from the original manufacturer or authorized distributors?
All LM4051BIX3-1.2 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 LM4051BIX3-1.2 meets industry standards.
7.What is the process for return or replacement of LM4051BIX3-1.2?
All LM4051BIX3-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4051BIX3-1.2, 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 LM4051BIX3-1.2 part is unused and in its original packaging.
Return procedure for LM4051BIX3-1.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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