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Analog Devices Inc./Maxim Integrated LM4051CIM3-1.2
- Part No.:
- LM4051CIM3-1.2
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4051CIM3-1.2.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,683
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Product details
Overview
LM4051CIM3-1.2 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 stable operation from -40°C to +125°C. It delivers low 28µVRMS noise (10Hz–10kHz), supports 60µA–15mA shunt current, and requires no output capacitor-ideal for battery-powered analog front-ends and portable instrumentation.
For engineers reviewing the LM4051CIM3-1.2 datasheet, LM4051CIM3-1.2 pinout, LM4051CIM3-1.2 application, or LM4051CIM3-1.2 equivalent, key selection criteria include guaranteed 1.225V reverse breakdown voltage at 100µA, ultra-small 1.8mm × 1.8mm footprint, micropower operation down to 60µA, and compatibility with capacitive loads without instability.
Technical Context
The LM4051CIM3-1.2 uses a laser-trimmed bandgap core to maintain precise 1.225V reverse breakdown across its operating current range. Its internal BiCMOS architecture enables low dynamic impedance (≤1.5Ω at 1mA) and stable regulation without external capacitance.
Designed for high-reliability shunt referencing, it tolerates forward currents up to 10mA and reverse currents up to 20mA, with guaranteed performance over full industrial temperature range (-40°C to +125°C) and long-term stability of 120ppm over 1000 hours.
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% (C-grade), enabling direct use in 12-bit ADC reference paths without calibration |
| Tempco | 50ppm/°C max over -40°C to +125°C, ensuring ≤±0.6% total voltage drift across full range |
| Shunt Current Range | 60µA to 15mA - supports ultra-low-power sensor biasing and high-current DAC references |
| Output Noise | 28µVRMS (10Hz–10kHz), critical for high-resolution data acquisition systems |
| Dynamic Impedance | ≤1.5Ω at 1mA, 120Hz - ensures minimal load-induced voltage shift in varying current conditions |
| Long-Term Stability | 120ppm over 1000h - reduces recalibration frequency in field-deployed equipment |
Pinout & Package
LM4051CIM3-1.2 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 | Connects to system ground or low-impedance return path; defines cathode-to-anode reference polarity |
| Pin 2 (−) | Cathode / Negative Terminal | Reference output node; sinks shunt current to maintain 1.225V across load |
| 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 space-constrained portable designs |
| No output capacitor required | Eliminates BOM cost and layout complexity while maintaining stability with any capacitive load |
| Wide shunt current range | 60µA–15mA operation enables use from micropower IoT sensors to industrial DAC buffers |
| Low wideband noise | 28µVRMS (10Hz–10kHz) preserves SNR in precision ADC and sensor signal chains |
| Laser-trimmed accuracy | ±0.5% initial tolerance (C-grade) reduces need for post-production trimming in production lines |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Reference for 12-bit ADC measuring ECG or pulse oximetry signals in handheld monitors. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225V reference for analog front-end gain stages and ADC conversion. Use Value: Low 28µVRMS noise and ±0.5% accuracy ensure <0.1% measurement error without calibration, extending battery life via 60µA minimum operating current. | Use Scenario: Precision reference for thermistor and RTD interfaces in remote environmental monitoring nodes. IC Role / Device Role / Timing Role: Micropower shunt reference supplying excitation and measurement reference for ratiometric sensor bridges. Use Value: 50ppm/°C tempco and -40°C to +125°C rating guarantee consistent readings across outdoor temperature extremes. |
| Industrial Process Transmitters | Wearable Health Devices |
Use Scenario: Reference for 4–20mA loop-powered transmitters converting pressure or flow signals. IC Role / Device Role / Timing Role: Stable shunt reference enabling accurate current-loop DAC output scaling and sensor linearization. Use Value: 15mA shunt current capability supports full-scale loop drive while maintaining 1.225V regulation under varying supply and load conditions. | Use Scenario: Reference for low-noise bio-amplifiers and motion sensor fusion in smartwatches and fitness bands. IC Role / Device Role / Timing Role: Compact, low-drift voltage reference for analog signal conditioning prior to MCU ADC sampling. Use Value: SC70-3 size fits tight wearable PCBs; 120ppm long-term stability minimizes recalibration needs over device lifetime. |
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 (2.5V min), 0.5% initial accuracy, 100ppm/°C tempco, SOT23-3 | Requires external resistors to set 1.225V; higher tempco increases drift in wide-temp environments | Select when adjustable output or cost sensitivity outweighs fixed-voltage precision and low tempco requirements |
| REF3012AIDBZR | 1.2V fixed, 0.2% initial accuracy, 50ppm/°C tempco, SOT23-3, 50µA min current | Slightly lower nominal voltage (1.2V vs. 1.225V); tighter initial accuracy but same tempco and package | Choose for higher accuracy where 15mV offset is acceptable; verify system gain calibration accommodates 1.2V reference |
Compared with TLVH431ACDBVR and REF3012AIDBZR, LM4051CIM3-1.2 provides exact 1.225V output with guaranteed C-grade accuracy and identical 50ppm/°C tempco in the smallest SC70 footprint-making it optimal for space-constrained, high-stability shunt reference designs.
Availability
LM4051CIM3-1.2 is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, and industrial process transmitters requiring stable component supply with guaranteed long-term availability.
Supply support for LM4051CIM3-1.2 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 communications applications.
The LM4050/LM4051 family was engineered to deliver high-accuracy, low-drift shunt references in ultra-compact packages for space- and power-sensitive systems.
FAQ
What is the nominal output voltage of the LM4051CIM3-1.2?
The LM4051CIM3-1.2 has a nominal reverse breakdown voltage of 1.225V, specified at 100µA test current and +25°C. Its C-grade tolerance is ±6.0mV at room temperature, yielding a typical range of 1.2189V to 1.2311V per the datasheet's electrical characteristics table.
Does the LM4051CIM3-1.2 require an external output capacitor?
No, the LM4051CIM3-1.2 does not require an external output capacitor for stability. It is designed to remain stable with any capacitive load, eliminating the need for added components and simplifying layout in compact designs where board space is constrained.
What is the operating temperature range for the LM4051CIM3-1.2?
The LM4051CIM3-1.2 is fully specified and guaranteed over the industrial temperature range of -40°C to +125°C. All key parameters-including output voltage, tempco, and dynamic impedance-are tested and validated across this full range.
What package type is used for the LM4051CIM3-1.2?
The LM4051CIM3-1.2 uses the SC70-3 surface-mount package (1.8mm × 1.8mm), which is 50% smaller than standard SOT23-3. Pin 3 is not connected and must be left floating or tied to Pin 2 per the manufacturer's pin description.
How does the LM4051CIM3-1.2 compare to the LM4050 series?
The LM4051CIM3-1.2 is the 1.225V variant within the LM4050/LM4051 family, differentiated by its lower output voltage and optimized SC70 packaging. Unlike LM4050 variants (2.048V and above), LM4051 variants target sub-1.25V reference needs in ultra-low-voltage systems, retaining identical accuracy grades, tempco, and performance specs.
LM4051CIM3-1.2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.225V
- Voltage - Output (Max):
- -
- Current - Output:
- 12 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4051CIM3-1.2 FAQ
1.How can I place an order for LM4051CIM3-1.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4051CIM3-1.2 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 LM4051CIM3-1.2 reliable?
The price and inventory of LM4051CIM3-1.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4051CIM3-1.2 is usually 5 days.
3.What payment methods are accepted for LM4051CIM3-1.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4051CIM3-1.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4051CIM3-1.2?
LM4051CIM3-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4051CIM3-1.2 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 LM4051CIM3-1.2?
For technical support, including LM4051CIM3-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4051CIM3-1.2 requirements.
6.How does Aetrix verify that LM4051CIM3-1.2 is sourced from the original manufacturer or authorized distributors?
All LM4051CIM3-1.2 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 LM4051CIM3-1.2 meets industry standards.
7.What is the process for return or replacement of LM4051CIM3-1.2?
All LM4051CIM3-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4051CIM3-1.2, 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 LM4051CIM3-1.2 part is unused and in its original packaging.
Return procedure for LM4051CIM3-1.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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