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Analog Devices Inc./Maxim Integrated LM4051CIX3-1.2+T
- Part No.:
- LM4051CIX3-1.2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4051CIX3-1.2+T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
LM4051CIX3-1.2+T from Maxim Integrated is a precision 1.225V shunt voltage reference in SC70-3 package, featuring ±0.5% initial accuracy, 50ppm/°C max temperature coefficient, and 60µA–15mA operating current range. It delivers stable reverse breakdown voltage for ADC/DAC biasing, sensor excitation, and portable power management circuits.
For engineers reviewing the LM4051CIX3-1.2+T datasheet, LM4051CIX3-1.2+T pinout, LM4051CIX3-1.2+T application, or LM4051CIX3-1.2+T 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 LM4051CIX3-1.2+T uses bandgap-based shunt regulation to maintain a precise 1.225V reverse breakdown voltage across its anode and cathode terminals. Its internal laser-trimmed resistor network ensures ±0.5% initial accuracy at +25°C, with guaranteed performance over full industrial temperature range.
It operates as a two-terminal device requiring only a series current-setting resistor, sinks up to 15mA shunt current, and exhibits low dynamic impedance (≤1.5Ω at 1mA) and stable output under varying load conditions - all without external stabilization capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V nominal reverse breakdown voltage, with ±6.0mV tolerance at +25°C (C-grade) |
| Initial Accuracy | ±0.5% at +25°C - enables direct use in 12-bit systems without calibration |
| Tempco | 50ppm/°C max over -40°C to +125°C - supports stable reference in automotive and industrial environments |
| Operating Current | 60µA to 15mA shunt range - accommodates micropower sensor nodes and higher-current analog front-ends |
| Noise (10Hz–10kHz) | 28µVRMS - low enough for high-resolution 16-bit ADC reference applications |
| Dynamic Impedance | ≤1.5Ω at 1mA - ensures minimal voltage shift under load transients |
| Long-Term Stability | 120ppm over 1000 hours - predictable aging behavior for mission-critical instrumentation |
Pinout & Package
LM4051CIX3-1.2+T is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is NC and must be left floating or tied to Pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode (positive terminal) | Connected to system ground or low-impedance return path; defines reference node polarity |
| Pin 2 (−) | Cathode (negative terminal) | Connected to regulated voltage node; reverse-biased during normal operation |
| Pin 3 (N.C.) | No connection | Must remain unconnected or shorted to Pin 2; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 package | 1.8mm × 1.8mm footprint - saves PCB area in wearables and compact IoT modules |
| No output capacitor required | Internally compensated for stability with any capacitive load - eliminates BOM cost and layout risk |
| Wide shunt current range | 60µA minimum start-up current enables operation in battery-powered sleep modes |
| Guaranteed temp range | -40°C to +125°C operation - qualified for under-hood automotive and industrial control applications |
| Low wideband noise | 28µVRMS (10Hz–10kHz) - preserves SNR in precision data acquisition systems |
Applications
| Portable Medical Sensors | Industrial Data Acquisition |
|---|---|
Use Scenario: Battery-powered glucose meter with integrated 14-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 1.225V reference for ADC conversion and sensor biasing circuitry. Use Value: Enables <1 LSB error over temperature without recalibration, extending battery life via micropower 60µA operation. | Use Scenario: 4–20mA loop-powered transmitter with RTD interface. IC Role / Device Role / Timing Role: Supplies precision excitation voltage for 3-wire RTD bridge and reference for DAC output stage. Use Value: 50ppm/°C tempco ensures <0.1% total error across -40°C to +85°C ambient, meeting IEC 61000-4 compliance. |
| Automotive Cabin Control | Smart Energy Meters |
Use Scenario: HVAC control module with thermistor-based cabin temperature sensing. IC Role / Device Role / Timing Role: Generates accurate bias for NTC thermistor ladder network and reference for microcontroller ADC. Use Value: Guaranteed operation to +125°C junction temperature allows placement near engine bay electronics without derating. | Use Scenario: DIN-rail mounted electricity meter with metrology-grade ADC. IC Role / Device Role / Timing Role: Serves as primary voltage reference for 24-bit sigma-delta ADC measuring grid voltage/current. Use Value: 120ppm long-term stability over 1000h ensures <0.01% drift between annual calibrations per ANSI C12.20. |
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 | 2.5V fixed output; adjustable version available; 100ppm/°C max tempco; SOT23-3 package | Higher output voltage limits use in low-voltage 1.8V systems; less stable over temperature | Select when 2.5V reference suffices and cost sensitivity outweighs precision requirements |
| REF3012AIDBVR | 1.2V output; 50ppm/°C max tempco; 50µA–25mA operating range; SOT23-3 | Slightly lower nominal voltage (1.2V vs. 1.225V); higher max current; same SC70-compatible footprint | Choose for tighter voltage matching in legacy 1.2V designs or where >15mA headroom is needed |
Compared with TLVH431ACDBVR and REF3012AIDBVR, LM4051CIX3-1.2+T offers exact 1.225V output optimized for 12-bit+ systems, guaranteed 60µA min start-up, and identical SC70-3 mechanical fit - making it the preferred choice for new designs targeting metrology-grade accuracy in constrained spaces.
Availability
LM4051CIX3-1.2+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition, and automotive cabin control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4051CIX3-1.2+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, automotive, and communications applications.
The LM4050/LM4051 product line delivers ultra-stable shunt references for high-accuracy measurement systems where space, power, and thermal stability are critical constraints.
FAQ
What is the output voltage tolerance of LM4051CIX3-1.2+T at +25°C?
The LM4051CIX3-1.2+T has a ±6.0mV (±0.5%) output voltage tolerance at +25°C, corresponding to the C-grade accuracy specification. This value is measured under 100µA shunt current and reflects the device's initial calibration before temperature and aging effects.
Does LM4051CIX3-1.2+T require an external capacitor for stability?
No, LM4051CIX3-1.2+T does not require an external capacitor for stability. It is internally compensated and remains stable with any capacitive load, including direct connection to ADC input capacitors or long PCB traces - eliminating design risk and BOM cost.
What is the minimum operating current for LM4051CIX3-1.2+T?
The minimum operating current for LM4051CIX3-1.2+T is 60µA, verified across the full -40°C to +125°C temperature range. Below this threshold, regulation is not guaranteed, and output voltage may deviate beyond specified tolerance.
Can LM4051CIX3-1.2+T be used in automotive under-hood applications?
Yes, LM4051CIX3-1.2+T is rated for -40°C to +125°C operation and qualified for automotive under-hood use. Its 50ppm/°C max tempco and 120ppm long-term stability ensure reliable performance in engine control units and cabin climate modules without derating.
What is the pin configuration of LM4051CIX3-1.2+T?
LM4051CIX3-1.2+T uses a 3-pin SC70 package with Pin 1 = Anode (+), Pin 2 = Cathode (−), and Pin 3 = No Connection (N.C.). Pin 3 must be left floating or tied to Pin 2; it is not internally bonded and serves no electrical function.
LM4051CIX3-1.2+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):
- 1.225V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- 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
LM4051CIX3-1.2+T FAQ
1.How can I place an order for LM4051CIX3-1.2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4051CIX3-1.2+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 LM4051CIX3-1.2+T reliable?
The price and inventory of LM4051CIX3-1.2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4051CIX3-1.2+T is usually 5 days.
3.What payment methods are accepted for LM4051CIX3-1.2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4051CIX3-1.2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4051CIX3-1.2+T?
LM4051CIX3-1.2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4051CIX3-1.2+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 LM4051CIX3-1.2+T?
For technical support, including LM4051CIX3-1.2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4051CIX3-1.2+T requirements.
6.How does Aetrix verify that LM4051CIX3-1.2+T is sourced from the original manufacturer or authorized distributors?
All LM4051CIX3-1.2+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 LM4051CIX3-1.2+T meets industry standards.
7.What is the process for return or replacement of LM4051CIX3-1.2+T?
All LM4051CIX3-1.2+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4051CIX3-1.2+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 LM4051CIX3-1.2+T part is unused and in its original packaging.
Return procedure for LM4051CIX3-1.2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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