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Texas Instruments LM4050AEM3X-2.5/NOPB
- Part No.:
- LM4050AEM3X-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AEM3X-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,994
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Product details
Overview
LM4050AEM3X-2.5/NOPB 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), 41 μVrms wideband noise (10 Hz–10 kHz), and 50 ppm/°C max temperature coefficient across −40°C to +85°C. It operates from 60 μA to 15 mA and requires no output capacitor, supporting space-constrained analog front-ends in portable instrumentation.
For engineers reviewing the LM4050AEM3X-2.5/NOPB datasheet, LM4050AEM3X-2.5/NOPB pinout, LM4050AEM3X-2.5/NOPB application, or LM4050AEM3X-2.5/NOPB equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in battery-powered data acquisition and precision audio, and two confirmed alternative parts with documented technical and application differences.
Technical Context
The LM4050AEM3X-2.5/NOPB uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation, enabling stable 2.5 V reference performance over industrial temperature range (−40°C to +85°C) and extended range (−40°C to +125°C). Its low dynamic impedance (0.3 Ω at 1 mA) and capacitive-load tolerance eliminate external stabilization components.
It achieves ±0.1% initial accuracy via wafer-level fuse and Zener-zap trimming, with long-term stability of 120 ppm after 1000 hours and thermal hysteresis of 0.7 mV across −40°C to +125°C cycling - critical for high-resolution ADC biasing and calibration circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal; enables precise 2.5 V biasing for 12-bit+ SAR ADCs and DAC references. |
| Initial Tolerance | ±0.1% at 25°C (A grade); reduces system calibration burden in production test equipment. |
| Temp Coefficient | ≤50 ppm/°C max over −40°C to +85°C; ensures <±11 mV drift across full industrial range. |
| Output Noise | 41 μVrms (10 Hz–10 kHz); supports low-noise sensor signal conditioning without post-filtering. |
| Operating Current | 60 μA min to 15 mA max; allows ultra-low-power operation in coin-cell devices and robust sourcing in active filters. |
| Dynamic Impedance | 0.3 Ω at 1 mA; maintains regulation under fast load transients in precision current sources. |
| Long-Term Stability | 120 ppm after 1000 hrs; ensures reference integrity over multi-year deployment in energy meters. |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference voltage node | Connects to regulated supply rail; sinks all operating current plus load current - sets reference voltage at this node. |
| Anode (Pin 2) | Common return / ground reference | Must be connected to system ground; defines 0 V reference point for cathode voltage measurement. |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or solder mask required - avoids unintended parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Eliminates BOM cost and board area for external COUT, simplifying layout in wearables and handheld testers. |
| Tolerates capacitive loads | Stable with any value of output capacitance - enables direct buffering into op-amp inputs or ADC sample capacitors. |
| Fixed 2.5 V breakdown | Matches common ADC/DAC full-scale ranges and microcontroller VREF inputs without resistor dividers. |
| Low 60 μA minimum current | Supports operation from high-impedance bias networks and nanoamp-level leakage-limited systems. |
| AEC-Q100 Grade 1 option | LM4050AEM3X-2.5/NOPB itself is industrial-grade; Q1 variant exists for automotive under-hood sensors (−40°C to +125°C). |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and auto-ranging front-end. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V VREF for ADC conversion and gain-setting DACs. Use Value: ±0.1% initial tolerance and 50 ppm/°C TC ensure <±0.02% full-scale error across operating temperature without recalibration. |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA sensor loops. IC Role / Device Role / Timing Role: Precision reference for current-to-voltage conversion and ADC reference in isolated channel cards. Use Value: 41 μVrms noise and 0.3 Ω dynamic impedance prevent reference-induced quantization noise in 24-bit measurements. |
| Precision Audio Components | Energy Management Systems |
Use Scenario: High-fidelity audio CODEC with integrated PGA and anti-aliasing filters. IC Role / Device Role / Timing Role: Bias reference for microphone preamplifier DC offset cancellation and DAC output stage. Use Value: Low thermal hysteresis (0.7 mV) prevents audible "popping" during power-up/down cycles in battery-powered recorders. |
Use Scenario: Smart electricity meter with metrology ASIC and tamper-detection circuitry. IC Role / Device Role / Timing Role: Stable reference for voltage and current channel ADCs, ensuring Class 0.2 accuracy compliance. Use Value: 120 ppm long-term stability guarantees meter calibration validity over 10+ years of field operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBVR | Adjustable 2.495 V reference (±1% initial), higher 1.5 mA min current, 0.22 Ω dynamic impedance. | Requires two external resistors for 2.5 V setting; unsuitable for ultra-low-power (<100 μA) designs. | Select when adjustable output or higher sink current (>100 mA) is needed; not drop-in for LM4050AEM3X-2.5/NOPB's fixed 2.5 V, micropower use. |
| MAX6126AASA25+ | 2.500 V series reference, ±0.02% initial tolerance, 1.1 μVrms noise, but requires 3.3 V–5.5 V supply and 200 μA quiescent current. | Series topology demands dedicated supply rail; incompatible with shunt-based bias networks. | Choose for lowest noise and highest accuracy where board space allows separate LDO and supply routing - not a functional substitute in shunt configurations. |
Compared with TL431ACDBVR and MAX6126AASA25+, the LM4050AEM3X-2.5/NOPB uniquely combines fixed 2.5 V output, 60 μA minimum current, no external capacitor requirement, and SOT-23 footprint - making it irreplaceable in space- and power-constrained shunt reference roles.
Availability
LM4050AEM3X-2.5/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and precision audio components requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050AEM3X-2.5/NOPB 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 and embedded processing technologies, with decades of expertise in precision reference design and high-volume manufacturing.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and high-accuracy measurement systems - targeting instrumentation, industrial sensing, and portable test equipment.
FAQ
What is the minimum operating current for LM4050AEM3X-2.5/NOPB?
The LM4050AEM3X-2.5/NOPB requires a minimum operating current of 60 μA at 25°C and up to 65 μA across its full industrial temperature range (−40°C to +85°C). This ultra-low current enables use in energy-harvesting and coin-cell-powered applications where supply current must be tightly constrained. The LM4050AEM3X-2.5/NOPB remains stable and within specification down to this threshold.
Does LM4050AEM3X-2.5/NOPB require an external output capacitor?
No - the LM4050AEM3X-2.5/NOPB is specifically designed to operate stably without any external output capacitor, unlike many older shunt references. Its internal architecture tolerates capacitive loads of any value, eliminating the need for COUT and reducing bill-of-materials cost and PCB area. This feature is explicitly validated in the TI datasheet SNOS455G Section 1.
What is the temperature coefficient specification for LM4050AEM3X-2.5/NOPB?
The LM4050AEM3X-2.5/NOPB has a maximum average temperature coefficient of 50 ppm/°C over the industrial temperature range (−40°C to +85°C). At 25°C, the typical coefficient is ±15 ppm/°C. This translates to a worst-case voltage drift of ±11 mV across the full range - calculated as 2.5 V × 50 ppm/°C × 65°C - ensuring predictable performance in unregulated thermal environments.
Is LM4050AEM3X-2.5/NOPB pin-compatible with other LM4050 variants?
Yes - all LM4050-N variants in the SOT-23 (DBZ) package, including LM4050AEM3X-2.5/NOPB, share identical pinout (Cathode, Anode, NC) and mechanical footprint. Voltage options (2.048 V, 4.096 V, 5 V, etc.) and grade variants (A/B/C) are fully interchangeable at the board level, enabling single-layout designs with voltage-selectable references.
What is the long-term stability of LM4050AEM3X-2.5/NOPB?
The LM4050AEM3X-2.5/NOPB exhibits 120 ppm maximum reverse breakdown voltage shift after 1000 hours of operation at 25°C and 100 μA test current. This long-term stability metric reflects parametric drift due to device aging and is measured under controlled conditions per JEDEC standards - critical for applications like utility meters and medical diagnostics where calibration intervals exceed five years.
LM4050AEM3X-2.5/NOPB 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:
- Active
- 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/NOPB FAQ
1.How can I place an order for LM4050AEM3X-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEM3X-2.5/NOPB 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/NOPB reliable?
The price and inventory of LM4050AEM3X-2.5/NOPB 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/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050AEM3X-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEM3X-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEM3X-2.5/NOPB?
LM4050AEM3X-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEM3X-2.5/NOPB 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/NOPB?
For technical support, including LM4050AEM3X-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEM3X-2.5/NOPB requirements.
6.How does Aetrix verify that LM4050AEM3X-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050AEM3X-2.5/NOPB 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/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050AEM3X-2.5/NOPB?
All LM4050AEM3X-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEM3X-2.5/NOPB, 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/NOPB part is unused and in its original packaging.
Return procedure for LM4050AEM3X-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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