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Analog Devices Inc./Maxim Integrated LM4050CIX3-3.0-T
- Part No.:
- LM4050CIX3-3.0-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050CIX3-3.0-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:10,567
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Product details
Overview
LM4050CIX3-3.0-T from Maxim Integrated is a precision 3.000V, two-terminal shunt voltage reference in SC70-3 package, featuring ±15 ppm/°C temperature coefficient, 0.5% initial accuracy, 60µA–15mA operating current range, and 45 µVRMS wideband noise (10Hz–10kHz). It serves as a stable reference in portable battery-powered systems where space and low quiescent current are critical.
For engineers reviewing the LM4050CIX3-3.0-T datasheet, LM4050CIX3-3.0-T pinout, LM4050CIX3-3.0-T application, or LM4050CIX3-3.0-T equivalent, this page delivers verified specifications, validated pin functions, real-world use cases, and technically grounded alternative options for precision analog design and power management circuits.
Technical Context
The LM4050CIX3-3.0-T implements a laser-trimmed bandgap core with BiCMOS process technology to achieve stable reverse breakdown regulation without external capacitors. Its shunt architecture sinks variable current to maintain fixed 3.000V across terminals under load variations from 60µA to 15mA.
Guaranteed over –40°C to +125°C, it delivers ±30 mV total tolerance (0.5% grade) and exhibits ≤0.9 Ω dynamic impedance at 1mA, enabling robust performance in high-temperature industrial and automotive subsystems requiring long-term stability and low noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000 V nominal; tightly regulated shunt reference voltage for ADC/DAC biasing and sensor excitation. |
| Initial Accuracy | ±15 mV (0.5% grade); ensures system-level calibration margin without post-production trimming. |
| Tempco | ±15 ppm/°C max; guarantees <±0.3 mV drift over full –40°C to +125°C range for thermal-stable designs. |
| Operating Current | 60 µA to 15 mA; supports ultra-low-power sleep modes and high-current precision sensing simultaneously. |
| Output Noise | 45 µVRMS (10 Hz–10 kHz); minimizes error in high-resolution data acquisition paths. |
| Dynamic Impedance | 0.3–0.9 Ω at 1 mA; maintains voltage stability during rapid load transients in mixed-signal systems. |
| Long-Term Stability | 120 ppm after 1000 h; reduces recalibration frequency in field-deployed instrumentation. |
Pinout & Package
LM4050CIX3-3.0-T uses the 3-pin SC70 surface-mount package (1.8 mm × 1.8 mm), 50% smaller than SOT23. Pin 3 is NC (no connection) and must be left floating or tied to pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode / Positive terminal | Reference output node; connects to load or feedback network; voltage referenced to pin 2. |
| Pin 2 (−) | Cathode / Negative terminal | Ground reference point; all current flows into this terminal during regulation. |
| Pin 3 (N.C.) | No connection | Must remain unconnected or shorted to pin 2; no internal function; floating violates specification. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8 mm × 1.8 mm area enables placement in dense portable PCB layouts with minimal board real estate. |
| No output capacitor required | Internally compensated for stability with any capacitive load-eliminates BOM cost and layout risk of external C. |
| Wide shunt current range | 60 µA minimum start-up current allows operation in micropower systems; 15 mA headroom supports active loads. |
| Low 45 µVRMS noise | Enables sub-16-bit ADC accuracy without additional filtering; critical for precision sensor signal chains. |
| –40°C to +125°C guaranteed operation | Validated performance across automotive under-hood and industrial control environments without derating. |
Applications
| Portable Medical Sensors | Notebook System Monitoring |
|---|---|
Use Scenario: Battery-powered glucose meter with 16-bit SAR ADC measuring electrochemical cell output. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.000V reference for ADC conversion and sensor biasing. Use Value: 0.5% initial accuracy and ±15 ppm/°C tempco ensure <±1 LSB error across temperature, eliminating field recalibration. |
Use Scenario: Real-time voltage monitoring of CPU core rail and memory supply in thin-and-light notebooks. IC Role / Device Role / Timing Role: Precision reference for system power management IC's internal ADC and comparator thresholds. Use Value: 45 µVRMS noise prevents false undervoltage detection; SC70 size fits tight space near VRM outputs. |
| Industrial Process Transmitters | Automotive Cabin Control Modules |
Use Scenario: 4–20 mA loop-powered pressure transmitter operating at 85°C ambient. IC Role / Device Role / Timing Role: Stable 3.000V reference for DAC generating loop current and sensor front-end amplification. Use Value: Guaranteed –40°C to +125°C operation and 120 ppm long-term stability reduce calibration drift over 10-year field life. |
Use Scenario: HVAC control unit with thermistor-based cabin temperature sensing and microcontroller ADC. IC Role / Device Role / Timing Role: Reference source for 12-bit internal ADC reading conditioned thermistor voltage. Use Value: 60 µA minimum operating current extends battery backup runtime during vehicle ignition-off states. |
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–36V) vs. fixed 3.000V; higher 100 ppm/°C tempco; 80 µA min current. | Requires external resistor network; less accurate over temperature; higher noise (75 µVRMS). | Select when adjustable output or higher voltage capability is needed; not drop-in for fixed 3.000V designs. |
| REF3030AIDBZR | Series topology (not shunt); 3.0V output; 50 ppm/°C tempco; 50 µA quiescent current. | Requires input-to-output headroom (~100 mV); cannot sink current; unsuitable for loop-powered or high-side sensing. | Choose for low-dropout series reference use cases; incompatible with shunt-based current-sinking topologies. |
Compared with TLVH431ACDBVR and REF3030AIDBZR, LM4050CIX3-3.0-T offers superior thermal stability, lower noise, and true two-terminal simplicity-making it optimal for space-constrained, battery-sensitive shunt-regulated systems where fixed 3.000V is required.
Availability
LM4050CIX3-3.0-T is available at Aetrix Electronics and suitable for portable medical sensors, notebook system monitoring, industrial process transmitters, and automotive cabin control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050CIX3-3.0-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) is a semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
LM4050CIX3-3.0-T belongs to the LM4050/LM4051 family of micropower shunt references designed for space-critical, battery-operated systems demanding high accuracy, low noise, and wide-temperature reliability without external compensation.
FAQ
What is the output voltage tolerance of LM4050CIX3-3.0-T over its full operating temperature range?
The LM4050CIX3-3.0-T (C-grade) has ±0.5% initial accuracy at +25°C and ±15 ppm/°C temperature coefficient. Over –40°C to +125°C, total tolerance is ±1.0%, corresponding to ±30 mV around the 3.000V nominal output. This is confirmed in the datasheet Note 2 and Electrical Characteristics table for 3.000V devices.
Can LM4050CIX3-3.0-T operate without an external capacitor?
Yes, LM4050CIX3-3.0-T does not require an external output capacitor and remains stable with any capacitive load. This is explicitly stated in the General Description and Applications Information sections, and verified by its internal compensation design-eliminating BOM cost and layout dependency on external capacitance.
What is the minimum operating current for LM4050CIX3-3.0-T, and why is it important?
The LM4050CIX3-3.0-T requires a minimum shunt current of 67 µA (per 3.000V electrical characteristics table) to maintain regulation. Operating below this threshold risks loss of voltage accuracy and instability. This value defines the lower bound for RS resistor selection in series-pass configurations and impacts battery life in micropower systems.
How does the SC70-3 package of LM4050CIX3-3.0-T compare to SOT23 versions in thermal performance?
The SC70-3 package has a higher thermal resistance than SOT23: 2.17 mW/°C derating above +70°C versus 4.01 mW/°C for SOT23. At 15 mA and 3.0V, LM4050CIX3-3.0-T dissipates 45 mW-resulting in ~21°C self-heating above ambient. Designers must verify junction temperature stays ≤+150°C, especially in high-ambient environments.
Is pin 3 of LM4050CIX3-3.0-T functional, and how should it be handled?
No, pin 3 of LM4050CIX3-3.0-T is N.C. (no connection) and must be left floating or connected to pin 2 (cathode) as specified in the Pin Description and Typical Operating Circuit diagrams. Connecting pin 3 to any other node may cause malfunction or violate absolute maximum ratings.
LM4050CIX3-3.0-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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 45µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 67 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4050CIX3-3.0-T FAQ
1.How can I place an order for LM4050CIX3-3.0-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIX3-3.0-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 LM4050CIX3-3.0-T reliable?
The price and inventory of LM4050CIX3-3.0-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CIX3-3.0-T is usually 5 days.
3.What payment methods are accepted for LM4050CIX3-3.0-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIX3-3.0-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIX3-3.0-T?
LM4050CIX3-3.0-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIX3-3.0-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 LM4050CIX3-3.0-T?
For technical support, including LM4050CIX3-3.0-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIX3-3.0-T requirements.
6.How does Aetrix verify that LM4050CIX3-3.0-T is sourced from the original manufacturer or authorized distributors?
All LM4050CIX3-3.0-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 LM4050CIX3-3.0-T meets industry standards.
7.What is the process for return or replacement of LM4050CIX3-3.0-T?
All LM4050CIX3-3.0-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIX3-3.0-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 LM4050CIX3-3.0-T part is unused and in its original packaging.
Return procedure for LM4050CIX3-3.0-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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