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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:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:910
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Product details
Overview
LM4051BIX3-1.2+ from Maxim Integrated is a precision 1.225V, two-terminal shunt voltage reference in SC70-3 package with ±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, key selection criteria include guaranteed -40°C to +125°C operation, no external capacitor requirement, low 28µVRMS noise (10Hz–10kHz), and compatibility with capacitive loads in space-constrained designs.
Technical Context
The LM4051BIX3-1.2+ uses a laser-trimmed bandgap core to maintain 1.225V reverse breakdown across 60µA–15mA shunt current, with dynamic impedance ≤1.5Ω at 1mA. Its BiCMOS process ensures stability without output capacitance while tolerating arbitrary capacitive loading.
Specified over -40°C to +125°C, it achieves ±15ppm/°C typical temperature coefficient and exhibits ≤120ppm long-term drift after 1000 hours. Pin 3 is NC and must be left floating or tied to pin 2 per datasheet layout guidance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V nominal reverse breakdown voltage, trimmed to ±0.2% tolerance at +25°C |
| Initial Accuracy | ±0.2% (LM4051B grade), enabling high-resolution 12-bit+ data conversion reference |
| Temp Coefficient | 50ppm/°C max over -40°C to +125°C, ensuring <±0.7% total drift across full industrial range |
| Operating Current | 60µA min to 15mA max shunt current, supporting ultra-low-power and high-current regulation |
| Noise (10Hz–10kHz) | 28µVRMS, critical for precision analog front-ends and low-noise sensor signal chains |
| Dynamic Impedance | ≤1.5Ω at 1mA, maintaining voltage stability under fast load transients |
| Long-Term Stability | 120ppm drift after 1000h, suitable for systems requiring multi-year calibration integrity |
Pinout & Package
SC70-3 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23-3, rated for -40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode / Positive Terminal | Reference output node; connects to regulated voltage rail or ADC reference input |
| 2 (−) | Cathode / Negative Terminal | Current sink node; ties to system ground or current-setting resistor |
| 3 (N.C.) | No Connection | Must be left floating or connected to pin 2; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves PCB space in portable and wearable electronics |
| No output capacitor required | Eliminates BOM cost and layout complexity while ensuring stability with any capacitive load |
| Wide shunt current range | 60µA–15mA operation supports both micropower sensor nodes and higher-current analog subsystems |
| Laser-trimmed accuracy | ±0.2% initial tolerance enables single-point calibration in production test flows |
| Low wideband noise | 28µVRMS (10Hz–10kHz) minimizes quantization error in precision ADC applications |
Applications
| Portable Medical Sensors | Industrial Data Acquisition |
|---|---|
Use Scenario: Battery-powered ECG front-end with 16-bit SAR ADC requiring stable 1.225V reference. IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and ADC VREF for analog signal chain. Use Value: 60µA minimum operating current extends battery life; 28µVRMS noise preserves SNR >90dB. | Use Scenario: 4–20mA loop-powered transmitter with RTD sensor interface. IC Role / Device Role / Timing Role: Precision shunt reference for DAC output scaling and sensor bridge excitation. Use Value: ±0.2% accuracy and 50ppm/°C tempco ensure <0.1% total error across -40°C to +85°C field environment. |
| Automotive Cabin Controllers | IoT Edge Node Power Management |
Use Scenario: HVAC control module with microcontroller ADC monitoring thermistor networks. IC Role / Device Role / Timing Role: Low-drift reference for ratiometric temperature measurement. Use Value: Guaranteed operation to +125°C ambient and 120ppm long-term stability reduce recalibration frequency. | Use Scenario: LPWAN sensor node using 3.3V LDO with 12-bit ADC for environmental monitoring. IC Role / Device Role / Timing Role: Micropower shunt reference supplying VREF to ADC and internal voltage monitor. Use Value: 60µA start-up current enables direct connection to energy-harvesting sources without startup delay. |
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 reference; requires two external resistors; 2% initial accuracy; 100ppm/°C tempco | Not drop-in; needs redesign of feedback network; lower accuracy limits 12-bit+ use cases | Select when adjustable output or cost sensitivity outweighs precision and size requirements |
| ADR3412ARJZ-R7 | Fixed 1.2V; 0.1% initial accuracy; 30ppm/°C tempco; SOT23-3 package; higher quiescent current (120µA min) | Higher accuracy but larger footprint and higher minimum current; not SC70-compatible | Choose for tighter accuracy where board space permits SOT23-3 and power budget allows ≥120µA |
Compared with TLVH431AIDBZR and ADR3412ARJZ-R7, the LM4051BIX3-1.2+ offers the smallest footprint (SC70-3), lowest minimum operating current (60µA), and optimal balance of 0.2% accuracy and 50ppm/°C tempco for space-constrained industrial and portable designs.
Availability
LM4051BIX3-1.2+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition, automotive cabin controllers, and IoT edge node power management requiring stable component supply across extended temperature ranges.
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, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The LM4050/LM4051 product line delivers micropower shunt voltage references optimized for space-critical, battery-operated, and high-reliability applications demanding guaranteed -40°C to +125°C performance.
FAQ
What is the exact output voltage tolerance of LM4051BIX3-1.2+ at +25°C?
The LM4051BIX3-1.2+ has a nominal reverse breakdown voltage of 1.225V with ±0.2% initial accuracy at +25°C, corresponding to a tolerance range of 1.2226V to 1.2275V per the LM4051B grade specification. This value is laser-trimmed and guaranteed across the full -40°C to +125°C operating range per datasheet Note 2.
Can LM4051BIX3-1.2+ operate without an external output capacitor?
Yes, the LM4051BIX3-1.2+ does not require an external output capacitor for stability and remains stable with any capacitive load. This eliminates BOM components and simplifies layout-confirmed in the datasheet's "Output Capacitance" section and Typical Operating Characteristics plots showing stable transient response with 0µF and 1µF loads.
What is the minimum shunt current required for regulation in LM4051BIX3-1.2+?
The LM4051BIX3-1.2+ requires a minimum shunt current of 60µA to maintain regulation, as specified in the Electrical Characteristics table for the 1.225V version. Below this threshold, reverse breakdown voltage accuracy degrades; design must ensure ISHUNT ≥ 60µA across all operating conditions including worst-case temperature and supply voltage.
Is pin 3 of LM4051BIX3-1.2+ functional or should it be left unconnected?
Pin 3 of LM4051BIX3-1.2+ is labeled N.C. (No Connection) and is not internally bonded. The datasheet explicitly states it "must be left floating or connected to pin 2." Connecting it elsewhere may compromise performance or reliability; no functionality is assigned to this terminal.
How does LM4051BIX3-1.2+ perform under high-temperature conditions up to +125°C?
The LM4051BIX3-1.2+ is fully specified and guaranteed over -40°C to +125°C. Its 50ppm/°C max temperature coefficient and ±0.2% initial accuracy ensure total output variation remains within ±0.7% across this range. Thermal derating is handled via package power dissipation limits (174mW at +70°C, derated 2.17mW/°C above), and junction temperature stays within +150°C limit under typical 15mA load conditions.
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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