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Texas Instruments LM4050AEM3X-2.5
- Part No.:
- LM4050AEM3X-2.5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AEM3X-2.5.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,556
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Product details
Overview
LM4050AEM3X-2.5 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 2.500 V reverse breakdown voltage with ±0.1% initial tolerance (A grade), 50 ppm/°C max temperature coefficient, and 41 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA over −40°C to 85°C and requires no output capacitor, supporting space-constrained battery-powered instrumentation.
For engineers reviewing the LM4050AEM3X-2.5 datasheet, LM4050AEM3X-2.5 pinout, LM4050AEM3X-2.5 application, or LM4050AEM3X-2.5 equivalent, key selection criteria include initial voltage accuracy, low operating current, capacitive-load stability, thermal hysteresis (0.7 mV), and industrial-temperature-range performance without external compensation.
Technical Context
The LM4050AEM3X-2.5 uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its dynamic impedance is 0.3 Ω at 1 mA, enabling stable regulation under varying load currents from 60 μA to 15 mA.
It achieves ±0.1% initial accuracy at 25°C and maintains ≤±11 mV total voltage tolerance over −40°C to 85°C (industrial range), verified via statistical quality control across production lots. The device tolerates unlimited capacitive loads and exhibits no oscillation without external stabilization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal; fixed reverse breakdown voltage for precision biasing and ADC/DAC reference |
| Initial Tolerance | ±0.1% at 25°C (A grade); ensures <±2.5 mV absolute error before temperature or aging effects |
| Temp Coefficient | 50 ppm/°C max (−40°C to 85°C); contributes ≤±8.125 mV drift over full industrial range |
| Operating Current | 60 μA min to 15 mA max; supports ultra-low-power sensor nodes and high-current analog front-ends |
| Output Noise | 41 μVrms (10 Hz–10 kHz); suitable for 16-bit+ data acquisition systems requiring low-noise references |
| Dynamic Impedance | 0.3 Ω at 1 mA; minimizes load-induced voltage shift during transient current changes |
| Long-Term Stability | 120 ppm after 1000 hrs; predictable aging behavior for calibration-critical applications |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body, 3-pin surface-mount, JEDEC MO-178AC compliant. Anode (Pin 2) connects to system ground; Cathode (Pin 1) carries shunt current and sets reference node; Pin 3 is NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current path & reference output node | Connects to regulated voltage node; sinks all current not drawn by load; defines VREF at this terminal |
| Anode (Pin 2) | Common return / ground reference | Must be connected to system ground; establishes reference potential for reverse-biased operation |
| NC (Pin 3) | No internal connection | Must remain unconnected or floating; no electrical function; avoids unintended parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Eliminates BOM cost and board area for stabilization; enables direct use in space-constrained layouts |
| Tolerates capacitive loads | Stable with any value of output capacitance; removes need for ESR constraints or damping networks |
| Low 60 μA minimum operating current | Enables operation in micropower systems such as coin-cell IoT sensors and portable medical devices |
| 50 ppm/°C max tempco | Ensures <±8.125 mV variation across −40°C to 85°C; meets industrial-grade precision requirements |
| 41 μVrms wideband noise | Supports high-resolution (≥16-bit) analog-to-digital conversion without added filtering overhead |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
|
Use Scenario: Handheld multimeters and portable oscilloscopes powered by Li-ion batteries with tight power budgets. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V for ADC reference and analog signal conditioning. Use Value: 60 μA minimum current enables >1-year battery life; ±0.1% tolerance ensures measurement repeatability without field recalibration. |
Use Scenario: Modular DAQ modules in factory automation, acquiring 16-bit sensor data across multiple channels. IC Role / Device Role / Timing Role: Precision voltage reference for successive-approximation ADCs and programmable gain amplifiers. Use Value: 41 μVrms noise and 0.3 Ω dynamic impedance preserve ENOB; no capacitor needed simplifies multi-channel layout. |
| Energy Management Units | Precision Audio Components |
|
Use Scenario: Smart metering subsystems monitoring grid voltage/current with metrology-grade accuracy. IC Role / Device Role / Timing Role: Reference source for isolated sigma-delta ADCs measuring AC mains parameters. Use Value: 120 ppm long-term stability and 0.7 mV thermal hysteresis ensure consistent billing accuracy over 10+ year product lifetime. |
Use Scenario: High-fidelity DAC output stages and active filters in studio-grade audio interfaces. IC Role / Device Role / Timing Role: Low-noise DC bias reference for op-amp rails and analog switch control voltages. Use Value: 41 μVrms noise floor prevents audible artifacts; SOT-23 footprint allows placement near sensitive analog circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050A25IDBZR | Same 2.5 V, ±0.1%, SOT-23; higher 75 μA min operating current; 55 ppm/°C max tempco | Less suitable for sub-70 μA systems; slightly higher thermal drift impacts wide-temperature designs | Prefer LM4050AEM3X-2.5 where ultra-low IQ or tighter tempco is critical |
| ADR3425ARJZ-R7 | 2.5 V series reference; 3.3 V min supply; 10 μA quiescent current; 10 ppm/°C max tempco | Requires dedicated supply rail; incompatible with shunt topology; superior drift but higher complexity | Select LM4050AEM3X-2.5 for simplicity, ground-referenced design, and minimal external components |
Compared with TL4050A25IDBZR and ADR3425ARJZ-R7, the LM4050AEM3X-2.5 uniquely combines ultra-low 60 μA start-up current, capacitor-free stability, and 50 ppm/°C tempco in a 3-pin shunt configuration-making it optimal for compact, battery-operated, and cost-sensitive precision analog systems.
Availability
LM4050AEM3X-2.5 is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management units requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050AEM3X-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 connectivity technologies, with decades of leadership in precision reference design.
The LM4050-N family was engineered for space-constrained, micropower applications demanding high initial accuracy, low noise, and robust capacitive-load stability-targeting instrumentation, portable test equipment, and industrial sensing.
FAQ
What is the minimum operating current for LM4050AEM3X-2.5?
The LM4050AEM3X-2.5 has a minimum operating current of 60 μA at 25°C, rising to 65 μA across the full −40°C to 85°C industrial temperature range. This ultra-low threshold enables reliable startup and regulation in micropower systems such as battery-backed sensors and portable meters where current budgets are tightly constrained. The LM4050AEM3X-2.5 maintains specified accuracy and noise performance down to this limit.
Does LM4050AEM3X-2.5 require an output capacitor for stability?
No, the LM4050AEM3X-2.5 does not require an output capacitor for stability. Its internal design eliminates the need for external compensation, and it remains stable with any capacitive load-including zero capacitance. This simplifies PCB layout, reduces BOM count, and avoids ESR-related instability risks common in other shunt references. The LM4050AEM3X-2.5 achieves this via proprietary dynamic impedance control and curvature-compensated bandgap architecture.
What is the temperature coefficient specification for LM4050AEM3X-2.5?
The LM4050AEM3X-2.5 has a maximum average temperature coefficient of 50 ppm/°C over the −40°C to 85°C industrial temperature range. At 25°C, the typical tempco is ±15 ppm/°C. This translates to a worst-case voltage drift of ±8.125 mV across the full range (2.5 V × 50 ppm/°C × 65°C), ensuring predictable performance in thermally varying environments without recalibration. The LM4050AEM3X-2.5 achieves this via on-die curvature correction.
How does LM4050AEM3X-2.5 compare to series voltage references in layout flexibility?
Unlike series references that require dedicated input and output pins plus decoupling, the LM4050AEM3X-2.5 operates as a 2-terminal shunt device-only needing Cathode and Anode connections-with Anode tied to ground. This enables placement directly at the load node, minimizes trace inductance, and avoids supply-rail dependencies. The LM4050AEM3X-2.5's SOT-23 footprint and capacitor-free operation further enhance routing simplicity in dense layouts where space and component count are critical.
What is the long-term stability of LM4050AEM3X-2.5?
The LM4050AEM3X-2.5 exhibits 120 ppm maximum reverse breakdown voltage change after 1000 hours of operation at 25°C and 100 μA bias current. This quantified aging behavior supports reliability modeling in calibration-critical applications such as metrology equipment and energy meters, where reference drift must be bounded over product lifetime. The LM4050AEM3X-2.5's wafer-level Zener-zap trimming and passivation contribute to this predictable stability profile.
LM4050AEM3X-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:
- ±0.1%
- 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
LM4050AEM3X-2.5 FAQ
1.How can I place an order for LM4050AEM3X-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEM3X-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 LM4050AEM3X-2.5 reliable?
The price and inventory of LM4050AEM3X-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 LM4050AEM3X-2.5 is usually 5 days.
3.What payment methods are accepted for LM4050AEM3X-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEM3X-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEM3X-2.5?
LM4050AEM3X-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEM3X-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 LM4050AEM3X-2.5?
For technical support, including LM4050AEM3X-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEM3X-2.5 requirements.
6.How does Aetrix verify that LM4050AEM3X-2.5 is sourced from the original manufacturer or authorized distributors?
All LM4050AEM3X-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 LM4050AEM3X-2.5 meets industry standards.
7.What is the process for return or replacement of LM4050AEM3X-2.5?
All LM4050AEM3X-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEM3X-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 LM4050AEM3X-2.5 part is unused and in its original packaging.
Return procedure for LM4050AEM3X-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050AEM3X-2.5 Tags
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