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Texas Instruments LM4050AEM3-2.5/NOPB
- Part No.:
- LM4050AEM3-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050AEM3-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,035
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Product details
Overview
LM4050AEM3-2.5/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 ±2.5 mV (±0.1%) 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 enables high-accuracy ADC biasing in portable instrumentation.
For engineers reviewing the LM4050AEM3-2.5/NOPB datasheet, LM4050AEM3-2.5/NOPB pinout, LM4050AEM3-2.5/NOPB application, or LM4050AEM3-2.5/NOPB equivalent, key selection criteria include its no-output-capacitor-required operation, capacitive-load tolerance, 0.3 Ω dynamic impedance at 1 mA, and A-grade industrial/extended temperature support - critical for battery-powered data acquisition and precision analog front-ends.
Technical Context
The LM4050AEM3-2.5/NOPB uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation, ensuring stable 2.5 V reference under varying load and thermal conditions. Its fuse-trimmed wafer-sort process guarantees ±0.1% initial accuracy without post-package calibration.
It functions as a two-terminal shunt regulator: cathode accepts input current and sets output voltage via reverse breakdown, while anode connects to system ground. The NC pin (Pin 3) is unconnected and must remain floating - enabling direct integration into compact, low-noise feedback paths without external stabilization components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal; ±2.5 mV (±0.1%) tolerance at 25°C ensures ≤1 LSB error in 12-bit systems |
| Tempco | ≤50 ppm/°C max over −40°C to 125°C; maintains <±11 mV drift across full industrial range |
| Operating Current | 65 μA min to 15 mA max; supports ultra-low-power sensor nodes and high-current DAC references |
| Noise (10 Hz–10 kHz) | 41 μVrms typical; contributes <0.025% of full-scale error in 16-bit ADCs |
| Dynamic Impedance | 0.3 Ω at 1 mA, 120 Hz; minimizes load-induced voltage shift in dynamic current-sinking applications |
| Long-Term Stability | 120 ppm after 1000 hrs; enables >10-year calibration retention in test equipment |
| Thermal Hysteresis | 0.7 mV over −40°C ↔ 125°C cycle; prevents repeatability errors in thermal-cycling environments |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, 3-pin surface-mount configuration with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Connects to regulated voltage rail; sinks all load + reference current; defines 2.5 V potential relative to anode |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; forms low-impedance return path for cathode current |
| NC (Pin 3) | No internal connection | Must remain unconnected or floating; no PCB trace or pad required |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Eliminates BOM cost and board space for stability; works with 0–∞ load capacitance |
| Tolerates capacitive loads | Stable under any CL, including ceramic decoupling caps on ADC reference inputs |
| Fixed 2.5 V breakdown | Matches standard DAC/ADC full-scale ranges; avoids resistor-divider error and drift |
| A-grade precision | ±0.1% initial accuracy enables factory calibration-free designs in portable test gear |
| Extended temp range | −40°C to +125°C operation supports automotive cabin and industrial motor-control environments |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and pressure with 16-bit sigma-delta ADCs. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.5 V excitation and ADC reference voltage. Use Value: 41 μVrms noise and 50 ppm/°C tempco ensure <±0.005% total error over 10-year field deployment. |
Use Scenario: 4–20 mA loop-powered transmitters converting RTD or strain-gauge signals in oil & gas plants. IC Role / Device Role / Timing Role: Precision shunt reference for ratiometric excitation and analog-to-digital conversion. Use Value: 65 μA minimum operating current enables operation below 100 μA loop budget; NC pin simplifies layout in tight enclosures. |
| Automotive Cabin Sensors | Calibration-Grade Test Equipment |
Use Scenario: Occupant detection and HVAC sensor modules requiring AEC-Q100-compliant references. IC Role / Device Role / Timing Role: Voltage reference for microcontroller ADCs and analog comparators in harsh-temperature zones. Use Value: Extended −40°C to +125°C range and 0.7 mV thermal hysteresis ensure repeatable readings after thermal cycling. |
Use Scenario: Benchtop multimeters and calibration sources needing long-term voltage stability and low noise. IC Role / Device Role / Timing Role: Primary shunt reference in closed-loop voltage calibrators with active temperature compensation. Use Value: 120 ppm 1000-hr long-term stability and ±2.5 mV initial tolerance reduce annual recalibration frequency by 60%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3025AIDBZR | Series reference (not shunt); requires input voltage ≥2.7 V; 50 μVrms noise; 50 ppm/°C tempco | Needs dedicated supply rail; unsuitable for current-limited or floating-node topologies | Select when system has clean ≥2.7 V supply and ground-referenced regulation is preferred |
| ADR3425ARJZ-R7 | Series reference; 3.6 V min input; 12 μVrms noise; 10 ppm/°C tempco; higher cost | Superior noise/tempco but incompatible with shunt topology; requires PCB redesign | Choose only if ultra-low noise and <10 ppm/°C drift justify series architecture and layout change |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the LM4050AEM3-2.5/NOPB uniquely supports shunt-mode operation with zero-input-voltage overhead, making it irreplaceable in current-loop, floating-sensor, and ultra-low-voltage (<2.7 V) applications where series references cannot function.
Availability
LM4050AEM3-2.5/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and automotive cabin sensing requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050AEM3-2.5/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, embedded processing, and power management ICs, with decades of heritage in precision reference design.
The LM4050-N family was engineered for space-constrained, micropower applications demanding high initial accuracy and low thermal drift - targeting portable medical devices, battery-operated test gear, and automotive subsystems where reliability and stability are non-negotiable.
FAQ
What is the minimum operating current for LM4050AEM3-2.5/NOPB?
The LM4050AEM3-2.5/NOPB 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 60 μA. This low quiescent current enables use in energy-harvesting and coin-cell-powered systems where supply current is tightly constrained. The LM4050AEM3-2.5/NOPB remains stable and within specification down to this threshold.
Does LM4050AEM3-2.5/NOPB require an output capacitor?
No, the LM4050AEM3-2.5/NOPB does not require an output capacitor for stability. Its internal design eliminates the need for external capacitance, even with large (>1 μF) ceramic or tantalum loads. This simplifies layout, reduces BOM count, and improves reliability in space-constrained applications - a key differentiator versus older shunt references. The LM4050AEM3-2.5/NOPB maintains stability across 0–∞ load capacitance.
What is the thermal hysteresis specification for LM4050AEM3-2.5/NOPB?
The LM4050AEM3-2.5/NOPB exhibits 0.7 mV maximum thermal hysteresis over a −40°C to 125°C temperature cycle, measured as the voltage difference at 25°C before and after extreme-temperature exposure. This low hysteresis ensures measurement repeatability in thermally cycled environments such as automotive cabins or outdoor industrial sensors - critical for calibration-grade performance. The LM4050AEM3-2.5/NOPB achieves this via monolithic bandgap-Zener hybrid construction.
Is LM4050AEM3-2.5/NOPB qualified for automotive applications?
The LM4050AEM3-2.5/NOPB is not AEC-Q100 qualified; it belongs to the industrial-grade LM4050-N series. For automotive use, TI offers the LM4050-N-Q1 variant (e.g., LM4050AEM3-2.5Q/NOPB), which is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and manufactured on an automotive-grade flow. The LM4050AEM3-2.5/NOPB remains suitable for non-safety-critical cabin sensors where full qualification is not mandated.
How does the LM4050AEM3-2.5/NOPB achieve ±0.1% initial accuracy?
The LM4050AEM3-2.5/NOPB achieves ±0.1% initial accuracy via wafer-level Zener-zap and fuse trimming during sort testing - a precision laser-based adjustment that sets the reverse breakdown voltage before packaging. This process, combined with curvature-corrected bandgap temperature compensation, ensures the LM4050AEM3-2.5/NOPB meets its A-grade tolerance without post-assembly calibration or external trimming components.
LM4050AEM3-2.5/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
LM4050AEM3-2.5/NOPB FAQ
1.How can I place an order for LM4050AEM3-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050AEM3-2.5/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 LM4050AEM3-2.5/NOPB reliable?
The price and inventory of LM4050AEM3-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050AEM3-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050AEM3-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050AEM3-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050AEM3-2.5/NOPB?
LM4050AEM3-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050AEM3-2.5/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 LM4050AEM3-2.5/NOPB?
For technical support, including LM4050AEM3-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050AEM3-2.5/NOPB requirements.
6.How does Aetrix verify that LM4050AEM3-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050AEM3-2.5/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 LM4050AEM3-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050AEM3-2.5/NOPB?
All LM4050AEM3-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050AEM3-2.5/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 LM4050AEM3-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4050AEM3-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050AEM3-2.5/NOPB Tags
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