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Analog Devices Inc./Maxim Integrated LM4050CIX3-2.5-T
- Part No.:
- LM4050CIX3-2.5-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050CIX3-2.5-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
LM4050CIX3-2.5-T from Maxim Integrated is a precision 2.500V shunt voltage reference in a 3-pin SC70 package, designed for space-constrained systems requiring stable, low-drift references. It delivers ±0.5% initial accuracy, ±15ppm/°C temperature coefficient over –40°C to +125°C, and operates across 65µA to 15mA shunt current - enabling use in portable instrumentation and battery-powered ADC front-ends.
For engineers reviewing the LM4050CIX3-2.5-T datasheet, LM4050CIX3-2.5-T pinout, LM4050CIX3-2.5-T application, or LM4050CIX3-2.5-T equivalent, this page provides verified electrical parameters, validated SC70 terminal mapping, real-world load-transient behavior, noise performance (35µVRMS), and direct alternative options with documented functional trade-offs.
Technical Context
The LM4050CIX3-2.5-T implements a laser-trimmed bandgap core with BiCMOS process technology, delivering fixed 2.500V reverse breakdown voltage without external capacitors. Its two-terminal shunt architecture sinks current to maintain regulation, eliminating need for series pass elements or feedback loops.
It guarantees operation from –40°C to +125°C with ≤120ppm long-term stability after 1000 hours, dynamic impedance of 0.3–0.9Ω at 1mA/120Hz, and tolerates any capacitive load while maintaining stability - critical for high-impedance sensor biasing and SAR ADC reference buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V nominal; guaranteed 2.4875V to 2.5125V at +25°C (C-grade) |
| Initial Accuracy | ±0.5% (±13mV) at +25°C - enables 12-bit system-level accuracy without calibration |
| Tempco | ±15ppm/°C max over –40°C to +125°C - contributes ≤±1.5mV drift across full range |
| Shunt Current Range | 65µA min to 15mA max - supports micropower sensor nodes and higher-current DAC references |
| Output Noise | 35µVRMS (10Hz–10kHz) - suitable for 16-bit precision data acquisition |
| Dynamic Impedance | 0.3–0.9Ω at 1mA/120Hz - ensures <1mV output shift under 1mA load transients |
| Long-Term Stability | 120ppm (0.012%) after 1000h - supports >10-year field reliability in industrial monitoring |
Pinout & Package
LM4050CIX3-2.5-T uses the 3-pin SC70 package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is NC and must be left floating or tied to Pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode / Positive Terminal | Connected to system ground or low-impedance return path; forms cathode-to-anode reverse bias path |
| Pin 2 (−) | Cathode / Negative Terminal | Reference output node; voltage regulated at 2.500V relative to Pin 1 when reverse-biased |
| Pin 3 (N.C.) | No Connection | Must remain unconnected or shorted to Pin 2; no internal circuitry - avoids parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70 footprint | 1.8mm × 1.8mm area - saves >50% PCB space vs. SOT23, ideal for wearables and compact modules |
| No output capacitor required | Stable with any capacitive load up to 10µF - eliminates BOM cost and layout sensitivity in ADC reference paths |
| Wide shunt current range | 65µA to 15mA operation - supports both ultra-low-power IoT sensors and moderate-current analog signal chains |
| Low wideband noise | 35µVRMS (10Hz–10kHz) - preserves SNR in 16-bit SAR and sigma-delta converter applications |
| Guaranteed high-temp operation | Specified from –40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Applications
| Portable Instrumentation | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Handheld multimeter with 16-bit ADC and auto-ranging front-end. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.500V reference for ADC conversion and internal DAC calibration. Use Value: ±0.5% initial accuracy and ±15ppm/°C tempco ensure <0.02% total error across operating temperature, eliminating factory recalibration. |
Use Scenario: Wireless environmental sensor node logging temperature/humidity every 5 minutes on coin cell. IC Role / Device Role / Timing Role: Low-quiescent reference for precision analog front-end and microcontroller VREF input. Use Value: 65µA minimum operating current enables >5-year battery life while maintaining 12-bit measurement fidelity. |
| Industrial Process Transmitters | Medical Point-of-Care Devices |
Use Scenario: 4–20mA loop-powered pressure transmitter with HART modulation. IC Role / Device Role / Timing Role: Primary voltage reference for current-loop DAC and sensor signal conditioning. Use Value: 120ppm long-term stability and –40°C to +125°C rating ensure calibration retention over 15+ years in harsh plant environments. |
Use Scenario: Portable blood glucose meter with electrochemical sensor and LCD display. IC Role / Device Role / Timing Role: Reference for analog sensor interface and microcontroller ADC during intermittent active measurement cycles. Use Value: SC70 package enables miniaturized PCB design; 35µVRMS noise prevents false readings in low-amplitude biosignal detection. |
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) 3-terminal shunt; 0.5% initial accuracy; 100ppm/°C tempco; SOT23-3 | Requires external resistor divider; higher tempco increases drift in wide-temperature deployments | Select when adjustable output or higher voltage (>5V) capability is needed; not drop-in for fixed 2.5V SC70 layouts |
| ADR3425ARJZ-R7 | Fixed 2.5V series reference; 0.1% accuracy; 10ppm/°C; SOT23-5; requires supply voltage >2.7V | Series topology consumes more quiescent current; incompatible with shunt-based bias networks | Choose for lower noise (10µVRMS) and tighter tempco where supply headroom permits series architecture |
Compared with LM4050CIX3-2.5-T, TLVH431ACDBVR offers flexibility but sacrifices thermal stability and board-space efficiency, while ADR3425ARJZ-R7 improves noise and drift but demands higher supply voltage and cannot replace shunt configurations without circuit redesign.
Availability
LM4050CIX3-2.5-T is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data loggers, and industrial process transmitters requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for LM4050CIX3-2.5-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, medical, and communications applications, emphasizing high accuracy, small size, and robustness.
The LM4050/LM4051 family was engineered specifically for space-constrained, battery-sensitive systems needing stable shunt references - prioritizing micropower operation, SC70 integration, and guaranteed performance across extended temperature ranges.
FAQ
What is the guaranteed operating temperature range for LM4050CIX3-2.5-T?
The LM4050CIX3-2.5-T is fully specified and guaranteed over –40°C to +125°C. All electrical characteristics - including output voltage, tempco, and dynamic impedance - are tested and warranted across this full industrial temperature range, making it suitable for under-hood automotive and factory-floor applications.
Does LM4050CIX3-2.5-T require an external output capacitor for stability?
No, LM4050CIX3-2.5-T does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including 0–10µF, eliminating the need for additional components in ADC reference buffers or sensor bias networks - a key advantage over many competing shunt references.
What is the minimum shunt current needed for regulation in LM4050CIX3-2.5-T?
The LM4050CIX3-2.5-T requires a minimum shunt current of 65µA to maintain regulation at 2.500V. This value is confirmed in the Electrical Characteristics table for the 2.500V grade under "Minimum Operating Current" (IRMIN), ensuring reliable startup and accuracy even in ultra-low-power modes.
How does the noise performance of LM4050CIX3-2.5-T compare to other shunt references?
LM4050CIX3-2.5-T delivers 35µVRMS wideband noise (10Hz–10kHz), measured at 100µA shunt current. This is lower than standard zener-based references (typically >60µVRMS) and sufficient for 16-bit data acquisition systems - verified in the Typical Operating Characteristics section of the datasheet.
Can LM4050CIX3-2.5-T be used in place of LM4050BIX3-2.5-T?
Yes, LM4050CIX3-2.5-T can substitute for LM4050BIX3-2.5-T in most applications, though with relaxed initial accuracy (±0.5% vs. ±0.2%). Both share identical SC70-3 package, pinout, tempco, and operating current range - no layout changes are needed, but system-level calibration may require adjustment for the wider tolerance band.
LM4050CIX3-2.5-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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- 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
LM4050CIX3-2.5-T FAQ
1.How can I place an order for LM4050CIX3-2.5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIX3-2.5-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 LM4050CIX3-2.5-T reliable?
The price and inventory of LM4050CIX3-2.5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CIX3-2.5-T is usually 5 days.
3.What payment methods are accepted for LM4050CIX3-2.5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIX3-2.5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIX3-2.5-T?
LM4050CIX3-2.5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIX3-2.5-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 LM4050CIX3-2.5-T?
For technical support, including LM4050CIX3-2.5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIX3-2.5-T requirements.
6.How does Aetrix verify that LM4050CIX3-2.5-T is sourced from the original manufacturer or authorized distributors?
All LM4050CIX3-2.5-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 LM4050CIX3-2.5-T meets industry standards.
7.What is the process for return or replacement of LM4050CIX3-2.5-T?
All LM4050CIX3-2.5-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIX3-2.5-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 LM4050CIX3-2.5-T part is unused and in its original packaging.
Return procedure for LM4050CIX3-2.5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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