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Texas Instruments LM4050BEM3X-2.5
- Part No.:
- LM4050BEM3X-2.5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BEM3X-2.5.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,702
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Product details
Overview
LM4050BEM3X-2.5 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 2.5 V reverse breakdown voltage with ±5 mV (±0.2%) initial tolerance at 25°C, 41 μVrms wideband noise (10 Hz–10 kHz), and 50 ppm/°C max temperature coefficient across −40°C to 125°C. It operates from 65 μA to 15 mA and requires no output capacitor, supporting space-constrained analog front-ends in portable instrumentation.
For engineers reviewing the LM4050BEM3X-2.5 datasheet, LM4050BEM3X-2.5 pinout, LM4050BEM3X-2.5 application, or LM4050BEM3X-2.5 equivalent, key selection criteria include its 2.5 V fixed reference accuracy, low-noise performance, capacitive-load tolerance, industrial/extended temperature support, and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
The LM4050BEM3X-2.5 uses bandgap-based Zener-zap trimmed shunt regulation with curvature-corrected temperature drift compensation, enabling stable 2.5 V reference output over wide current (65 μA–15 mA) and temperature (−40°C to 125°C) ranges. Its dynamic impedance is 0.3 Ω at 1 mA, ensuring minimal load-induced voltage deviation.
It features fuse-trimmed reverse breakdown voltage during wafer sort for grade-B (±0.2%) accuracy, supports capacitive loads without external stabilization, and exhibits 120 ppm long-term stability after 1000 hours at 25°C - critical for calibration-critical measurement systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal; enables precise ADC/DAC biasing and sensor excitation at standard logic-compatible level |
| Initial Tolerance | ±5 mV (±0.2%) at 25°C; ensures first-pass accuracy without trimming in production test |
| Temp Coefficient | ≤50 ppm/°C max over −40°C to 125°C; limits reference drift to ±1.3 mV across full range |
| Operating Current | 65 μA min to 15 mA max; supports ultra-low-power battery operation and high-current sensing circuits |
| Output Noise | 41 μVrms (10 Hz–10 kHz); preserves SNR in 16-bit+ data acquisition systems |
| Dynamic Impedance | 0.3 Ω at 1 mA; minimizes load-regulation error (<2.3 mV change from 1–15 mA) |
| Long-Term Stability | 120 ppm after 1000 hrs; maintains calibration integrity in field-deployed equipment |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount, 3-pin configuration with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference voltage node | Connects to supply rail; sinks all operating current; defines 2.5 V reference potential relative to Anode |
| Anode (Pin 2) | Common return / ground reference | Must be connected to system ground; serves as voltage reference reference point |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no routing or soldering required |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into compact layouts without stability-compensation components |
| Tolerates capacitive loads | Stable with any load capacitance - eliminates need for series resistance or isolation |
| Fixed 2.5 V reverse breakdown | Matches common ADC reference rails and microcontroller VREF inputs without scaling |
| Low 41 μVrms noise | Supports high-resolution analog signal chains without added filtering overhead |
| −40°C to 125°C extended temp range | Validated for under-hood automotive and industrial control environments |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeters and battery-powered sensor nodes requiring stable reference under varying load and temperature. IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and ADC reference for precision analog front-end. Use Value: 65 μA minimum operating current extends battery life; ±5 mV tolerance avoids factory calibration. |
Use Scenario: Modular DAQ modules sampling thermocouples, strain gauges, and RTDs in lab and field environments. IC Role / Device Role / Timing Role: Precision reference source for 16-bit SAR ADCs and programmable gain instrumentation amplifiers. Use Value: 41 μVrms noise and ≤50 ppm/°C drift preserve effective resolution across temperature swings. |
| Process Control Transmitters | Automotive Battery Monitoring |
Use Scenario: 4–20 mA loop-powered transmitters measuring pressure, flow, or level in industrial plants. IC Role / Device Role / Timing Role: Stable 2.5 V reference for DACs generating loop current and for sensor signal conditioning. Use Value: 120 ppm long-term stability ensures calibration retention over multi-year maintenance cycles. |
Use Scenario: In-vehicle battery voltage monitoring and cell balancing circuits in 12 V and 48 V architectures. IC Role / Device Role / Timing Role: Reference for high-side current sense amplifiers and MCU ADCs tracking battery state-of-health. Use Value: Extended −40°C to 125°C rating supports operation near engine compartments and under hood electronics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050B25IDBZR | Same 2.5 V, ±0.2% tolerance, SOT-23 package; 45 μVrms noise; 60 μA min current | Lower noise floor but tighter min current spec; less margin in ultra-low-power sleep modes | Select when lower noise is prioritized and supply can guarantee ≥60 μA quiescent current |
| ADR3425ARJZ-R7 | 2.5 V, ±0.1% (A-grade), SOT-23; 10 μVp-p (0.1–10 Hz); 100 μA min current; higher cost | Superior initial accuracy and low-frequency noise; requires ≥100 μA, limiting use in sub-100 μA systems | Choose for metrology-grade calibration where 0.1% tolerance and microvolt-level drift dominate design |
Compared with TL4050B25IDBZR and ADR3425ARJZ-R7, the LM4050BEM3X-2.5 offers optimal balance of 0.2% accuracy, 65 μA minimum current, and proven robustness in extended temperature automotive and industrial deployments - making it preferred for cost-sensitive, wide-operating-range applications where moderate noise is acceptable.
Availability
LM4050BEM3X-2.5 is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and process control transmitters requiring stable component supply with guaranteed long-term continuity and traceable sourcing.
Supply support for LM4050BEM3X-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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in precision reference design.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and high-reliability applications - emphasizing accuracy, thermal stability, and ease of use without external compensation.
FAQ
What is the minimum operating current for LM4050BEM3X-2.5?
The LM4050BEM3X-2.5 requires a minimum operating current of 65 μA across its full temperature range (−40°C to 125°C). At 25°C, the typical minimum is 41 μA, but design must accommodate the worst-case 65 μA to ensure regulation stability. This value is confirmed in Section 6.6 of the SNOS455G datasheet under "IRMIN" for the 2.5-V option, grade B.
Does LM4050BEM3X-2.5 require an output capacitor?
No, the LM4050BEM3X-2.5 does not require an output capacitor for stability. Its internal design tolerates any capacitive load without oscillation, eliminating the need for external stabilization components. This is explicitly stated in the Features section and validated in the Functional Block Diagram and Application Information sections of the TI datasheet.
What is the temperature coefficient specification for LM4050BEM3X-2.5?
The LM4050BEM3X-2.5 has a maximum temperature coefficient of 50 ppm/°C over the full operating range of −40°C to 125°C. At 25°C, the typical coefficient is ±15 ppm/°C. This ensures total voltage drift remains within ±1.3 mV across the extended temperature range - critical for uncalibrated field instruments.
Is LM4050BEM3X-2.5 qualified for automotive applications?
The LM4050BEM3X-2.5 is part of the industrial-grade LM4050-N family and is not AEC-Q100 qualified. For automotive use, TI offers the LM4050-N-Q1 variant (e.g., LM4050BEM3X-2.5Q1), which is AEC-Q100 Grade 1 qualified and manufactured on an automotive-grade flow. The standard LM4050BEM3X-2.5 is rated for −40°C to 125°C but lacks automotive qualification documentation.
What is the reverse dynamic impedance of LM4050BEM3X-2.5?
The reverse dynamic impedance of LM4050BEM3X-2.5 is 0.3 Ω, measured at 1 mA DC current with 120 Hz, 0.1×IR AC signal. This low impedance ensures excellent load regulation - output voltage changes by only 2.3 mV when load current shifts from 1 mA to 15 mA at 25°C, as specified in Section 6.6 of the datasheet.
LM4050BEM3X-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 41µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050BEM3X-2.5 FAQ
1.How can I place an order for LM4050BEM3X-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BEM3X-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 LM4050BEM3X-2.5 reliable?
The price and inventory of LM4050BEM3X-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 LM4050BEM3X-2.5 is usually 5 days.
3.What payment methods are accepted for LM4050BEM3X-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BEM3X-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BEM3X-2.5?
LM4050BEM3X-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BEM3X-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 LM4050BEM3X-2.5?
For technical support, including LM4050BEM3X-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BEM3X-2.5 requirements.
6.How does Aetrix verify that LM4050BEM3X-2.5 is sourced from the original manufacturer or authorized distributors?
All LM4050BEM3X-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 LM4050BEM3X-2.5 meets industry standards.
7.What is the process for return or replacement of LM4050BEM3X-2.5?
All LM4050BEM3X-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BEM3X-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 LM4050BEM3X-2.5 part is unused and in its original packaging.
Return procedure for LM4050BEM3X-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050BEM3X-2.5 Tags
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