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Analog Devices Inc./Maxim Integrated LM4050CIX3-2.1
- Part No.:
- LM4050CIX3-2.1
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050CIX3-2.1.pdf
- Description:
- LM4050 50PPM PER DEGREE CELSIUS
- Quantity:
- Payment:
- Shipping:
Inventory:1,105
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Product details
Overview
LM4050CIX3-2.1 from Maxim Integrated is a precision 2.048V shunt voltage reference in SC70-3 package, featuring ±10mV initial accuracy (0.5%), 50ppm/°C max temperature coefficient, 60µA–15mA operating current range, and 28µVRMS wideband noise (10Hz–10kHz). It serves as a stable reference for ADCs, DACs, and battery-powered instrumentation.
For engineers reviewing the LM4050CIX3-2.1 datasheet, LM4050CIX3-2.1 pinout, LM4050CIX3-2.1 application, or LM4050CIX3-2.1 equivalent, key selection criteria include guaranteed -40°C to +125°C operation, no external capacitor requirement, low dynamic impedance (≤0.9Ω), and compatibility with capacitive loads in space-constrained designs.
Technical Context
The LM4050CIX3-2.1 uses a laser-trimmed bandgap core to deliver fixed 2.048V reverse breakdown voltage with ±10mV tolerance at +25°C and ±20mV over full temperature range. Its internal pass transistor regulates by sinking variable shunt current (60µA–15mA) to maintain output stability across supply and load variations.
Designed for micropower systems, it achieves 28µVRMS noise performance without output capacitance and tolerates any capacitive load while maintaining stability - eliminating need for compensation networks in portable or industrial sensor front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048V nominal; enables precise 12-bit ADC/DAC referencing with minimal gain error. |
| Initial Accuracy | ±10mV (0.5%); ensures ≤1 LSB error in 12-bit systems at room temperature. |
| Temp Coefficient | 50ppm/°C max; contributes ≤±102µV drift over -40°C to +125°C span. |
| Operating Current | 60µA to 15mA; supports ultra-low-power sleep modes and high-current regulation simultaneously. |
| Dynamic Impedance | ≤0.9Ω at 1mA; maintains <1mV output shift under 1mA load transients. |
| Output Noise | 28µVRMS (10Hz–10kHz); avoids noise-induced quantization errors in precision measurement circuits. |
| Long-Term Stability | 120ppm over 1000h; ensures reference integrity in sealed industrial modules. |
Pinout & Package
LM4050CIX3-2.1 is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23-3. Pin 3 is NC and must be left floating or tied to Pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode / Cathode input terminal | Connects to higher-potential node; reverse-biased during normal operation. |
| Pin 2 (−) | Cathode / Reference output terminal | Provides stable 2.048V reference; connects to load ground or feedback node. |
| Pin 3 (N.C.) | No connection | Must remain unconnected or shorted to Pin 2; no internal function. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 package | 1.8mm × 1.8mm footprint saves >50% board area vs. SOT23-3 in wearables and medical sensors. |
| 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 sleep states and fast transient response in active mode. |
| Guaranteed -40°C to +125°C operation | Validated performance across automotive under-hood and industrial process control environments. |
| Laser-trimmed accuracy | ±10mV initial tolerance enables direct use in 12-bit data acquisition without calibration. |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental sensor node measuring temperature/humidity with 12-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 2.048V reference for ADC conversion, enabling accurate ratiometric measurements independent of battery voltage decay. Use Value: Enables >12-bit effective resolution over full battery life (2.7V–4.2V) without recalibration or voltage scaling. | Use Scenario: 4–20mA loop-powered pressure transmitter in oil & gas field instrumentation. IC Role / Device Role / Timing Role: Supplies precision reference for DAC generating loop current setpoint and for analog front-end signal conditioning. Use Value: Maintains ≤0.5% total error budget across -40°C to +85°C ambient, meeting SIL-2 functional safety requirements. |
| Medical Pulse Oximeters | Automotive Cabin Air Quality Sensors |
Use Scenario: Wearable pulse oximeter using dual-wavelength photodiode array and low-noise analog signal chain. IC Role / Device Role / Timing Role: Low-noise (28µVRMS) 2.048V reference for correlated double sampling ADC and LED driver biasing. Use Value: Reduces baseline noise floor by >3dB vs. standard references, improving SpO₂ detection sensitivity at low perfusion. | Use Scenario: In-cabin CO₂/VOC sensor module integrated into HVAC control unit. IC Role / Device Role / Timing Role: Stable reference for NDIR detector amplifier and microcontroller ADC monitoring thermistor network. Use Value: Ensures <±1% reading accuracy over vehicle lifetime despite thermal cycling and long-term drift exposure. |
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 2.048V; 2% initial accuracy; 100ppm/°C tempco; SOT23-3 package. | Requires external resistor divider; less suitable for space-constrained 2.048V-specific designs. | Select when adjustable output or higher voltage (>2.5V) is needed; not drop-in for LM4050CIX3-2.1. |
| REF3020AIDBZR | 2.048V fixed output; 0.2% initial accuracy; 50ppm/°C tempco; SC70-3; but series topology (not shunt). | Requires minimum load current; incompatible with shunt-based biasing topologies like high-side current sensing. | Choose for low-quiescent-current series reference where supply headroom permits; not electrically interchangeable. |
Compared with TLVH431ACDBVR and REF3020AIDBZR, the LM4050CIX3-2.1 offers tighter fixed-voltage accuracy and true shunt operation - critical for low-headroom, high-impedance, or capacitor-tolerant applications where series references fail or require redesign.
Availability
LM4050CIX3-2.1 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and medical monitoring devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050CIX3-2.1 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 product line delivers micropower shunt voltage references optimized for space-constrained, wide-temperature, and low-noise systems - targeting battery-powered instrumentation and high-reliability sensor interfaces.
FAQ
What is the output voltage tolerance of LM4050CIX3-2.1 over its full operating temperature range?
The LM4050CIX3-2.1 has ±20mV total tolerance over -40°C to +125°C, combining ±10mV initial accuracy and ±50ppm/°C temperature coefficient. This results in ≤±0.7% total error, validated across production units per Maxim's datasheet Section 3 (ELECTRICAL CHARACTERISTICS-2.048V).
Can LM4050CIX3-2.1 operate without an external output capacitor?
Yes, LM4050CIX3-2.1 is internally compensated and stable with any capacitive load - including zero capacitance. No external capacitor is required, simplifying layout and reducing BOM count in compact PCB designs.
What is the minimum operating current for LM4050CIX3-2.1?
The LM4050CIX3-2.1 requires a minimum shunt current of 60µA to maintain regulation. Below this threshold, output voltage deviates beyond specification; design must ensure ISHUNT ≥60µA under worst-case conditions (e.g., lowest VS and highest ILOAD).
Is LM4050CIX3-2.1 compatible with capacitive loads?
Yes, LM4050CIX3-2.1 is explicitly characterized to remain stable with any output capacitance value - from 0pF to large bulk capacitors - making it ideal for noisy environments or systems with long traces and decoupling networks.
What does the 'C' grade signify in LM4050CIX3-2.1?
The 'C' in LM4050CIX3-2.1 denotes the 0.5% initial accuracy grade (±10mV at +25°C), part of Maxim's three-tier accuracy offering (A=0.1%, B=0.2%, C=0.5%). All grades share identical 50ppm/°C tempco, SC70-3 package, and -40°C to +125°C rating.
LM4050CIX3-2.1 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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 28µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4050CIX3-2.1 FAQ
1.How can I place an order for LM4050CIX3-2.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIX3-2.1 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 LM4050CIX3-2.1 reliable?
The price and inventory of LM4050CIX3-2.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CIX3-2.1 is usually 5 days.
3.What payment methods are accepted for LM4050CIX3-2.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIX3-2.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIX3-2.1?
LM4050CIX3-2.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIX3-2.1 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 LM4050CIX3-2.1?
For technical support, including LM4050CIX3-2.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIX3-2.1 requirements.
6.How does Aetrix verify that LM4050CIX3-2.1 is sourced from the original manufacturer or authorized distributors?
All LM4050CIX3-2.1 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 LM4050CIX3-2.1 meets industry standards.
7.What is the process for return or replacement of LM4050CIX3-2.1?
All LM4050CIX3-2.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIX3-2.1, 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 LM4050CIX3-2.1 part is unused and in its original packaging.
Return procedure for LM4050CIX3-2.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050CIX3-2.1 Tags
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