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Analog Devices Inc./Maxim Integrated LM4050BIX3-2.5
- Part No.:
- LM4050BIX3-2.5
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4050BIX3-2.5.pdf
- Description:
- LM4050 50PPM PER DEGREE CELSIUS
- Quantity:
- Payment:
- Shipping:
Inventory:1,855
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Product details
Overview
LM4050BIX3-2.5 from Maxim Integrated is a precision 2.500V shunt voltage reference in SC70-3 package, featuring ±5.0mV initial accuracy (0.2%), ±15ppm/°C temperature coefficient over –40°C to +125°C, 60µA–15mA operating current range, and 35µVRMS wideband noise (10Hz–10kHz). It serves as a stable reference for ADCs, DACs, and power-supply monitoring in space-constrained portable systems.
For engineers reviewing the LM4050BIX3-2.5 datasheet, LM4050BIX3-2.5 pinout, LM4050BIX3-2.5 application, or LM4050BIX3-2.5 equivalent, key selection criteria include guaranteed 0.2% initial tolerance at +25°C, no external capacitor requirement, stability with capacitive loads, and compatibility with micropower battery-operated designs requiring low quiescent current and high thermal stability.
Technical Context
The LM4050BIX3-2.5 uses a laser-trimmed bandgap core to deliver fixed 2.500V reverse breakdown voltage with minimal drift. Its two-terminal shunt architecture sinks current through an external series resistor to maintain regulation-no forward-bias operation required.
It achieves ±15ppm/°C typical tempco and maintains <8.0mV output voltage change across 1mA–15mA shunt current, enabling stable reference performance in varying load and temperature conditions without output capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±5.0mV at +25°C - ensures precise biasing for 12-bit+ data converters. |
| Initial Accuracy | 0.2% (±5.0mV) - grade-B tolerance enables cost-effective high-accuracy reference without calibration. |
| Tempco | ±15ppm/°C - guarantees ≤±0.375mV drift over –40°C to +125°C, critical for industrial sensor front-ends. |
| Operating Current | 60µA to 15mA - supports ultra-low-power sleep modes and high-current regulation in same device. |
| Output Noise | 35µVRMS (10Hz–10kHz) - low enough for 16-bit SAR ADC reference without additional filtering. |
| Dynamic Impedance | 0.3Ω to 0.8Ω at 1mA - minimizes load-induced voltage sag during transient current demands. |
| Long-Term Stability | 120ppm over 1000h - ensures reference integrity in sealed or inaccessible embedded deployments. |
Pinout & Package
LM4050BIX3-2.5 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 | Connects to higher-potential node; reverse-biased terminal where shunt current enters. |
| Pin 2 (−) | Cathode / Reference Output | Provides stable 2.500V reference voltage; connects to load and feedback networks. |
| Pin 3 (N.C.) | No Connection | Must remain unconnected or shorted to Pin 2; no internal function or electrical path. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 package | 1.8mm × 1.8mm footprint saves >50% board area vs. SOT23-3, ideal for wearables and compact IoT nodes. |
| No output capacitor required | Stable under all capacitive loads - eliminates BOM cost, layout risk, and startup delay from external C. |
| Wide shunt current range | 60µA minimum ensures reliable start-up in µA-level systems; 15mA max supports high-precision active circuits. |
| Low 35µVRMS noise | Enables direct use with 16-bit analog signal chains without added filtering or LDO post-regulation. |
| Guaranteed –40°C to +125°C operation | Validated performance across full automotive and industrial ambient ranges without derating. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous glucose monitor with integrated 14-bit ADC sampling analog biosensor output. IC Role / Device Role / Timing Role: Provides stable 2.500V reference for ADC conversion, rejecting supply ripple and temperature drift. Use Value: Enables ±0.1% measurement accuracy over –20°C to +50°C ambient, meeting ISO 15197 clinical requirements. | Use Scenario: Remote environmental sensor node logging temperature/humidity every 5 minutes on coin-cell battery. IC Role / Device Role / Timing Role: Supplies precision reference to low-power SAR ADC during brief active periods. Use Value: 60µA minimum operating current extends battery life to >5 years while maintaining 12-bit effective resolution. |
| Industrial Process Transmitters | Automotive Cabin Control Units |
Use Scenario: 4–20mA loop-powered pressure transmitter operating in factory environments up to +85°C. IC Role / Device Role / Timing Role: References the DAC generating the loop current; must track over temperature without recalibration. Use Value: ±15ppm/°C tempco ensures <±0.05% full-scale error across –40°C to +85°C, eliminating field calibration. | Use Scenario: HVAC control module in vehicle dashboard with microcontroller, display, and thermistor interface. IC Role / Device Role / Timing Role: Supplies reference to internal ADC measuring cabin temperature and humidity. Use Value: Guaranteed operation to +125°C junction temperature allows placement near heat-generating MCU without derating. |
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 2.5V; less stable over temperature and current | Choose when adjustable output or lower cost is prioritized over precision and thermal stability. |
| REF3025AIDBZR | 2.500V fixed, 0.2% accuracy, 50ppm/°C tempco, but series topology (3-pin, higher dropout) | Requires ≥2.7V input; not shunt-based - incompatible with high-side sensing or simple resistor biasing | Choose only if system already uses series references and needs identical accuracy/tempco with different topology constraints. |
Compared with TLVH431ACDBVR and REF3025AIDBZR, LM4050BIX3-2.5 delivers superior thermal stability (±15ppm/°C vs. 100ppm/°C or 50ppm/°C), true two-terminal simplicity, and guaranteed micropower operation down to 60µA - making it optimal for compact, battery-sensitive, and thermally demanding shunt-reference designs.
Availability
LM4050BIX3-2.5 is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, and industrial process transmitters requiring stable component supply with consistent lead times and RoHS-compliant sourcing.
Supply support for LM4050BIX3-2.5 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 industrial, automotive, and communications markets, emphasizing high accuracy, low power, and small form factor.
The LM4050/LM4051 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and wide-temperature applications where stability, size, and simplicity are critical.
FAQ
What is the guaranteed initial accuracy of LM4050BIX3-2.5 at +25°C?
The LM4050BIX3-2.5 is specified with ±5.0mV (0.2%) initial accuracy at +25°C, corresponding to a 2.495V to 2.505V output voltage range. This grade-B tolerance is laser-trimmed and production-tested per Maxim's datasheet, ensuring predictable performance without user calibration.
Does LM4050BIX3-2.5 require an external output capacitor for stability?
No, LM4050BIX3-2.5 does not require an external output capacitor. Its internal design ensures unconditional stability with any capacitive load, including 0µF. This eliminates BOM cost, PCB area, and potential oscillation risks associated with capacitor selection and layout parasitics.
What is the minimum operating current for LM4050BIX3-2.5, and why is it important?
The LM4050BIX3-2.5 requires a minimum shunt current of 60µA to maintain regulation. Below this threshold, output voltage deviates from specification. This value defines the lowest usable bias point in ultra-low-power systems, directly impacting battery life and wake-up reliability in intermittent-sampling applications.
Can LM4050BIX3-2.5 be used in automotive under-hood applications?
Yes, LM4050BIX3-2.5 is rated for operation from –40°C to +125°C and qualified for industrial and automotive ambient environments. Its guaranteed performance across this range, combined with 120ppm long-term stability, makes it suitable for cabin control units and non-safety-critical under-hood modules where junction temperature remains within +150°C limits.
How does the temperature coefficient of LM4050BIX3-2.5 affect its output over temperature?
The LM4050BIX3-2.5 has a guaranteed ±15ppm/°C temperature coefficient. Over the full –40°C to +125°C range (ΔT = 165°C), this contributes ≤±0.619mV drift (±15ppm × 2.5V × 165), well within its total accuracy budget. Actual drift is typically parabolic and often less than the worst-case linear bound.
LM4050BIX3-2.5 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:
- ±0.2%
- 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
LM4050BIX3-2.5 FAQ
1.How can I place an order for LM4050BIX3-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BIX3-2.5 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 LM4050BIX3-2.5 reliable?
The price and inventory of LM4050BIX3-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BIX3-2.5 is usually 5 days.
3.What payment methods are accepted for LM4050BIX3-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BIX3-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BIX3-2.5?
LM4050BIX3-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BIX3-2.5 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 LM4050BIX3-2.5?
For technical support, including LM4050BIX3-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BIX3-2.5 requirements.
6.How does Aetrix verify that LM4050BIX3-2.5 is sourced from the original manufacturer or authorized distributors?
All LM4050BIX3-2.5 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 LM4050BIX3-2.5 meets industry standards.
7.What is the process for return or replacement of LM4050BIX3-2.5?
All LM4050BIX3-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BIX3-2.5, 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 LM4050BIX3-2.5 part is unused and in its original packaging.
Return procedure for LM4050BIX3-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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