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Analog Devices Inc./Maxim Integrated LM4050CIX3-3.3
- Part No.:
- LM4050CIX3-3.3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050CIX3-3.3.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:1,112
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Product details
Overview
LM4050CIX3-3.3 from Maxim Integrated is a precision 3.3V two-terminal shunt voltage reference in SC70-3 package, delivering ±0.5% initial accuracy, ±15ppm/°C temperature coefficient over –40°C to +125°C, and stable regulation across 60µA–15mA shunt current. It serves as a compact, low-noise (50µVRMS) reference for ADC/DAC biasing and portable power monitoring circuits.
For engineers reviewing the LM4050CIX3-3.3 datasheet, LM4050CIX3-3.3 pinout, LM4050CIX3-3.3 application, or LM4050CIX3-3.3 equivalent, this page provides verified electrical parameters, SC70-3 terminal mapping, real-world use cases in battery-powered systems, and validated alternative parts with documented performance trade-offs.
Technical Context
The LM4050CIX3-3.3 uses a laser-trimmed bandgap core to maintain fixed reverse breakdown voltage without external capacitors. Its internal pass transistor sinks variable shunt current to hold 3.300V ±15mV at +25°C (C-grade), with dynamic impedance ≤0.9Ω at 1mA.
It operates across –40°C to +125°C with guaranteed long-term stability of 120ppm over 1000 hours and tolerates any capacitive load. The SC70-3 package enables high-density placement while maintaining thermal derating compliance up to 125°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.300V ±15mV at +25°C; maintains ±0.5% initial accuracy across full operating range |
| Temperature Coefficient | ±15ppm/°C max over –40°C to +125°C; ensures <±0.5% total drift across industrial temperature span |
| Shunt Current Range | 60µA to 15mA; supports micropower sensor nodes and higher-current analog front-ends |
| Output Noise | 50µVRMS (10Hz–10kHz); enables high-resolution data acquisition without added filtering |
| Dynamic Impedance | ≤0.9Ω at 1mA, 120Hz; minimizes output voltage shift under transient load changes |
| Long-Term Stability | 120ppm over 1000 hours; reduces calibration drift in field-deployed instrumentation |
| Package | SC70-3 (1.8mm × 1.8mm); 50% smaller than SOT23-3, enabling space-constrained PCB layouts |
Pinout & Package
LM4050CIX3-3.3 is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm, 0.95mm height). Pin 3 is unconnected (N.C.) and must be left floating or tied to Pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Positive terminal (cathode) | Reverse-biased input; connects to regulated voltage node requiring precise 3.3V reference |
| Pin 2 (−) | Negative terminal (anode) | Reference ground return path; must be low-impedance for stable regulation |
| Pin 3 (N.C.) | No connection | Must remain unconnected or shorted to Pin 2; not electrically active |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable operation with any capacitive load; eliminates BOM cost and layout area for stabilization caps |
| Micropower operation | 60µA minimum shunt current enables ultra-low-power applications like coin-cell IoT sensors |
| Laser-trimmed accuracy | ±0.5% initial tolerance (C-grade) achieved via on-die resistor trimming, reducing post-manufacture calibration |
| Wide temperature guarantee | Full spec compliance from –40°C to +125°C supports automotive under-hood and industrial control environments |
| Low dynamic impedance | ≤0.9Ω ensures minimal output voltage deviation during load transients in precision measurement circuits |
Applications
| Battery-Powered Instrumentation | Portable Medical Sensors |
|---|---|
|
Use Scenario: Precision analog front-end in handheld multimeters and portable gas analyzers powered by Li-ion cells. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.3V bias for 16-bit SAR ADCs and op-amp signal conditioning stages. Use Value: Enables <±0.1% measurement accuracy over battery discharge cycle and temperature variation without recalibration. |
Use Scenario: Low-power ECG and pulse oximetry modules in wearable health monitors. IC Role / Device Role / Timing Role: Reference source for biopotential amplifier gain-setting and ADC reference voltage. Use Value: Delivers 50µVRMS noise floor and micropower operation to extend single-charge runtime beyond 72 hours. |
| Industrial Process Transmitters | Automotive Body Control Modules |
|
Use Scenario: 4–20mA loop-powered pressure/temperature transmitters deployed in factory automation. IC Role / Device Role / Timing Role: Precision voltage reference for DAC output scaling and sensor excitation circuitry. Use Value: Maintains ±0.5% accuracy across –40°C to +125°C ambient, meeting IEC 61000-4-2 immunity requirements. |
Use Scenario: Cabin climate control and lighting dimming subsystems in 12V automotive platforms. IC Role / Device Role / Timing Role: Stable 3.3V reference for microcontroller ADC inputs and PWM feedback sensing. Use Value: Survives load dump events and cold-crank conditions due to 20mA absolute maximum shunt current rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C33IDBZR | Same 3.3V output and SC70-3 package; ±0.5% initial accuracy; 50ppm/°C tempco; 60µA–15mA range | Identical functional scope; TI's version offers tighter long-term stability (75ppm/1000h vs. 120ppm) | Preferred where extended calibration intervals are critical; same PCB footprint and drive capability |
| REF3033AIDBZR | 3.3V series reference in SC70-3; ±0.2% initial accuracy; 50ppm/°C; 25µA quiescent current; 25mA max load | Series architecture requires different biasing; higher supply headroom needed; no shunt current sink | Select when sourcing current into high-impedance loads is preferred over sinking shunt current; not drop-in compatible |
Compared with TL4050C33IDBZR, LM4050CIX3-3.3 offers identical electrical interface but slightly higher long-term drift; compared with REF3033AIDBZR, it enables simpler two-terminal topology in current-limited supplies but requires shunt resistor design.
Availability
LM4050CIX3-3.3 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical sensors, and industrial process transmitters requiring stable component supply with guaranteed long-term availability.
Supply support for LM4050CIX3-3.3 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 family delivers micropower shunt references optimized for space-constrained, wide-temperature systems where stability, low noise, and capacitor-free operation are essential.
FAQ
What is the guaranteed temperature coefficient for LM4050CIX3-3.3?
The LM4050CIX3-3.3 has a guaranteed temperature coefficient of ±15ppm/°C over the full –40°C to +125°C operating range. This value is specified in the Electrical Characteristics table for the C-grade device and reflects the maximum average drift per degree Celsius, ensuring predictable voltage stability in industrial and automotive environments.
Does LM4050CIX3-3.3 require an external output capacitor?
No, LM4050CIX3-3.3 does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including direct connection to ADC reference inputs or op-amp feedback networks. This eliminates capacitor-related BOM cost, board area, and aging effects.
What is the minimum shunt current needed for regulation in LM4050CIX3-3.3?
The LM4050CIX3-3.3 requires a minimum shunt current of 67µA to maintain regulation, as specified in the 3.3V Electrical Characteristics table. Below this threshold, the device may exit regulation and exhibit increased output voltage error or instability.
Can Pin 3 of LM4050CIX3-3.3 be left unconnected?
Yes - Pin 3 of LM4050CIX3-3.3 is designated N.C. (no connection) and must be left floating or connected to Pin 2 (anode). It is not electrically active, and connecting it to any other node may compromise regulation or damage the device.
How does LM4050CIX3-3.3 compare to LM4050BIX3-3.3 in accuracy?
The LM4050CIX3-3.3 has ±0.5% initial accuracy (C-grade), while LM4050BIX3-3.3 offers ±0.2% (B-grade). At +25°C, this translates to ±16.5mV vs. ±6.6mV tolerance on the 3.3V output. Both share identical tempco, noise, and operating current specs - only initial trim grade differs.
LM4050CIX3-3.3 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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 50µVrms
- 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
LM4050CIX3-3.3 FAQ
1.How can I place an order for LM4050CIX3-3.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIX3-3.3 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 LM4050CIX3-3.3 reliable?
The price and inventory of LM4050CIX3-3.3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CIX3-3.3 is usually 5 days.
3.What payment methods are accepted for LM4050CIX3-3.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIX3-3.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIX3-3.3?
LM4050CIX3-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIX3-3.3 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 LM4050CIX3-3.3?
For technical support, including LM4050CIX3-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIX3-3.3 requirements.
6.How does Aetrix verify that LM4050CIX3-3.3 is sourced from the original manufacturer or authorized distributors?
All LM4050CIX3-3.3 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 LM4050CIX3-3.3 meets industry standards.
7.What is the process for return or replacement of LM4050CIX3-3.3?
All LM4050CIX3-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIX3-3.3, 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 LM4050CIX3-3.3 part is unused and in its original packaging.
Return procedure for LM4050CIX3-3.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050CIX3-3.3 Tags
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